Identification of water problems
Many people determine the quality of the water they consume by how it smells, tastes or looks. Although these are important criteria, they are primarily aesthetic properties of the water. A glass of water may not look, smell or taste good, but it could still be suitable to drink from a health standpoint.
The way water looks, smells and tastes can be used to help determine what type of treatment is necessary to improve the quality of the water. The following guidelines will help you determine if there are any problems with your water and what the most likely cause of those problems might be. All you need is a clear container to take a water sample and then use your senses of sight, smell and taste.
APPEARANCE
Water is clear when first drawn from the raw water tap then becomes yellow or reddish in appearance, but clears upon standing for 24 hours.
Dissolved iron present.
Water is yellow or reddish when first drawn from the raw water tap but clears upon standing for 24 hours.
Undissolved iron present.
Yellow or brownish cast to water even after softening and/or filtering and does not clear up after standing for 24 hours.
Tannin (humic acid) in water. Comes from water passing through coal veins, peaty soils and decaying vegetation.
Black cast to water that clears upon standing for 24 hours.
Dissolved manganese present.
Milky water.
Excessive air in the water caused by the well pump sucking air (excessive drawdown) or a malfunctioning pressure tank. Also, can be caused by high amounts of bicarbonate precipitates resulting from an increase in pH.
Blackening, tarnishing, or pitting of metal sinks, utensils, pipes, etc.
High amounts of salt (chlorides and sulfates) or hydrogen sulfide gas.
Green stains on sinks and other porcelain bathroom fixtures. Blue green cast to water.
Acidic water (pH below 6.8) reacting with brass and copper pipes and fittings.
Suspended matter in water.
Caused by riled up water in a surface supply or sand pumping from a well.
Soap curds and lime scum in wash basins and bathtubs. Whitish scale deposits in tea kettle and on the ends of plumbing fixtures (faucet, shower head, etc.).
Hard Water caused by calcium and magnesium salts in the raw water supply.
Stained aluminum cookware.
High dissolved mineral content and high alkalinity in the raw water.
SMELL
Chlorine smell.
Normal chlorination of public or private well sources.
Fishy, musty or earthy smell.
Generally harmless organic matter. Commonly associated with surface water supplies.
Rotten egg odor from the raw water tap or directly from the well.
Dissolved hydrogen sulfide gas in the raw water.
Rotten egg odor only from the hot water tap.
Sulfates present in the raw water reacting with the magnesium anode which causes hydrogen sulfide gas. Can be corrected by removing the anode or replacing it with an aluminum anode.
Detergent odor and water foams when drawn. Also septic odor.
Leakage from a sewer system is entering the water supply.
TASTE
Salty flavor to the water that may have a laxative effect in some situations.
High salt content (primarily sodium sulfate and magnesium sulfate).
Metallic taste.
High concentration of manganese, or possibly other metals.
Correction of the water problem
When the cause of a water problem has been identified, then a method of treatment can be used to correct or minimize the problem. Before purchasing a treatment system, first have your water analyzed by a state certified laboratory to determine the quantity of foreign material in your water. The most common water tests are for:
Coliform Bacteria
Nitrates
pH
Total Dissolved Solids
Hardness
Iron and Manganese
After the water is analyzed, you can use the following chart to determine what treatment methods are needed to correct the problem. You may have identified more than one problem. If this is the case, you may need more than one type of treatment. Many reputable water treatment companies have equipment that will treat more than one problem.
Raw Water Problems and Commom Treatment Methods
------------------------------------------------------------
Raw Water Problem Common Treatment Method
------------------------------------------------------------
Bacterial contamination Treat using chlorination or other
forms of disinfection (boiling,
iodine, etc.) until the source of
contamination is found and corrected
or removed.
Fine sand, clay Remove using mechanical (fine screen)
or other sediments or sand filtration.
Odor and taste other Corrected with activated carbon
than ROTTEN EGG SMELL filters.
Hydrogen Sulfide Gas Remove using chlorination followed by
(ROTTEN EGG SMELL) sedimentation or use an oxidation
filter (sometimes called an aeration
filter) followed by an activated carbon
filter to remove excess chlorine.
Small amounts of Remove with a common water softener.
dissolved iron and The water softener manufacturer should
manganese. have a level of iron removal rating.
Higher amounts of Remove using an oxidizing agent such as
dissolved iron and potassium permanganate or chlorine
manganese followed by a mechanical screen or use
a green sand filter.
Suspended iron and Remove using mechanical (fine screen)
manganese particles or sand filtration.
Hard water Treat using a water softener.
Acid water Treat with a neutralizing filter (adds
(pH less than 5.0) calcium carbonate)
Alkaline water Treat by injecting a weak acid (acetic
(pH greater than 9.0) acid or white vinegar)
Tannin (humic acid) Remove using chlorination with a
detention tank or a special anion
exchange unit.
Volatile organic1 Remove using an activated carbon
compounds, certain filter. Other treatment options
pesticides, trihalo- include reverse osmosis or distillation.
methanes and radon
Nitrates, heavy metals* Remove with reverse osmosis or by
(lead, copper, etc.), distillation. Nitrates can be removed
high total dissolved with an anion exchange unit.
solids (TDS), sodium,
sulfates.
------------------------------------------------------------
*These problems are not generally noticeable to human senses.
Testing for these constituents should be performed by a
trained professional familiar with the problems that can cause
these forms of contamination.
Common water treatment methods
A brief description of the six most common types of household water treatment is found on the following chart. The list explains the main use for the treatment method and also, equally important, the major limitations of the method.
Common Home Water Treatment Methods
------------------------------------------------------------------------
Treatment
Method Main Use Restrictions
------------------------------------------------------------------------
Water Reduces water hardness minerals Replaces calcium and
Softening (calcium and magnesium) by magnesium with sodium
replacing them with sodium. which can present a
problem for people on
Softened water requires less low sodium diets. A
soap or detergent for washing kitchen faucet should be
and cleaning. left unsoftened for
drinking purposes.
Reduces scale formation in Periodic backwashing and
pipes, water heaters and on regeneration of the
faucets. Improves sudsing resin bed using salt
ability of soaps and detergents. brine is required.
------------------------------------------------------------------------
Oxidative Reduces iron and manganese Periodic backwashing
Iron concentrations to levels where required. Periodic
Filtration they don't stain clothes or recharging with potassium
plumbing fixtures. permanganate is
required.
Prevents odors caused by
hydrogen sulfide Should be installed
(rotten egg smell). upstream from a water
softener.
------------------------------------------------------------------------
Activated Removes general taste and odor Generally does not
Carbon problems including chlorine. remove nitrates, sulfates,
Filtration bacteria or heavy metals.
Usually installed at the Periodic replacement of
point-of-use for drinking activated charcoal
and cooking. (usually in canisters)
is required forcontinuous
operation.
------------------------------------------------------------------------
Reverse Reduces heavy metals, most Does not remove all
Osmosis pesticides, and fluoride to organic chemicals such
acceptable levels. as chloroform. Does not
remove 100% of most
Used primarily for drinking chemicals.
and cooking. Uses large amounts of
water for flushing.
------------------------------------------------------------------------
Distillation Removal of dissolved minerals, Produces bland tasting
trace amounts of heavy metals water.
and many organic chemicals.
Requires significant
Used primarily for drinking energy, therefore small
and cooking. capacity units are used.
------------------------------------------------------------------------
Chlorination Disinfection of biologically Not recommended as a
contaminated water supplies, continuous practice for
"shock" treatment of wells and the control of bacteria
storage tanks. in private water wells.
A new, bacteria free
Aids in the removal of high source of water should be
levels of iron and manganese. found.
Additional treatment is
required to remove
residual chlorine and
chlorinated organics.
------------------------------------------------------------------------
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Sunday, February 20, 2005
IDENTIFICATION OF WATER PROBLEM
Environmental Entrepreneur,Green Biz.NRN Murthy of Infosys says that we Indians are weak in execution.We need to realize the need and practice of gud project management. Form a group of competent Managers,Give them responsibilities and review the project from day One.
SOLVING IRON PROBLEM IN WELL WATER
Aeration followed by filtration
High levels of dissolved iron and manganese at combined concentrations up to 25 mg/l can be oxidized to a solid form by aeration (mixing with air). For domestic water processing, the "pressure-type aerator" often is used.
In this system, air is sucked in and mixed with the passing stream of water. This air-saturated water then enters the precipitator/aerator vessel where air separates from the water. From this point, the water flows through a filter where various filter media are used to screen out oxidized particles of iron, manganese and some carbonate or sulfate.
The most important maintenance step involved in operation is periodic backwashing of the filter. Manganese oxidation is slower than for iron and requires greater quantities of oxygen. Aeration is not recommended for water containing organic complexes of iron/manganese or iron/manganese bacteria that will clog the aspirator and filter.
Chemical oxidation followed by filtration
High levels of dissolved or oxidized iron and manganese greater than 10 mg/l can be treated by chemical oxidation, using an oxidizing chemical such as chlorine, followed by a sand trap filter to remove the precipitated material. Iron or manganese also can be oxidized from the dissolved to solid form by adding potassium permanganate or hydrogen peroxide to untreated water. This treatment is particularly valuable when iron is combined with organic matter or when iron bacteria is present.
The oxidizing chemical is put into the water by a small feed pump that operates when the well pump operates. This may be done in the well, but typically is done just before the water enters a storage tank. A retention time of at least 20 minutes is required to allow oxidation to take place. The resulting solid particles then must be filtered. When large concentrations of iron are present, a flushing sand filter may be needed for the filtering process.
If organic-complexed or colloidal iron/manganese is present in untreated water, a longer contact time and higher concentrations of chemicals are necessary for oxidation to take place. Adding aluminum sulfate (alum) improves filtration by causing larger iron/manganese particles to form.
When chlorine is used as the oxidizing agent, excess chlorine remains in treated water. If the particle filter is made of calcite, sand, anthracite or aluminum silicate, a minimum quantity of chlorine should be used to avoid the unpleasant taste that results from excess chlorine. An activated carbon filter can be used to remove excess chlorine and small quantities of solid iron/manganese particles.
Any filtration material requires frequent and regular backwashing or replacement to eliminate the solid iron/manganese particles. Some units have an automatic backwash cycle to handle this task.
The ideal pH range for chlorine bleach to oxidize iron is 6.5 to 7.5. Chlorination is not the method of choice for high manganese levels since a pH greater than 9.5 is required for complete oxidation. Potassium permanganate will effectively oxidize manganese at pH values above 7.5 and is more effective than chlorine oxidation of organic iron if that is a problem.
Potassium permanganate is poisonous and a skin irritant. There must be no excess potassium permanganate in treated water and the concentrated chemical must be stored in its original container away from children and animals. Careful calibration, maintenance and monitoring are required when potassium permanganate is used as an oxidizing agent.
Table I. Treatment of iron and manganese in drinking water
Indication Cause Treatment
Water clear when drawn but red-brown or black particles appear as water stands; red-brown or black stains on fixtures or laundry Dissolved iron or manganese Phosphate compounds (< 3 mg/l iron)
Water softener (<5 mg/l combined concentrations of iron and manganese)
Oxidizing filter (manganese greensand or zeolite) (<15 mg/l combined concentrations of iron and manganese)
Aeration (pressure) (<25mg/l combined concentrations of iron and manganese)
Chemical oxidation with potassium permanganate or chlorine; followed with filtration (>10 mg/l combined concentrations of iron and manganese)
Water contains red-brown particles when drawn; particles settle out as water stands Iron particles from corrosion of pipes and equipment Raise pH with neutralizing filter
Water contains red-brown or black particles when drawn; particles settle out as water stands Oxidized iron/manganese due to exposure of water to air prior to tap Particle filter (if quantity of oxidized material is high, use larger filter than inline; e.g., sand filter)
Red-brown or black slime appears in toilet tanks or from clogs in faucets Iron or manganese bacteria Kill bacteria masses by shock treatment with chlorine or potassium permanganate, then filter; bacteria may originate in well, so it may require continuous feed of chlorine or potassium permanganate, then filter
Reddish or black color that remains longer than 24 hours Colloidal iron/manganese; organically complexed iron/manganese Chemical oxidation with chlorine or potassium permanganate; followed with filtration
Adapted from "Iron and Manganese in Household Water," Water Treatment Notes. Fact Sheet 6, Cornell Cooperative Extension. (1989).
Estimate the water volume contained in the well casing using Table I and the "YOUR WELL" column of the following worksheet.
Table I. Volume of water contained per foot of well depth.
Well casing diameter (inches) Water volume per foot of
water depth (gallons)1
4 0.65
6 1.47
8 2.61
10 4.08
12 5.88
18 13.22
24 23.50
30 36.72
36 52.87
1Volume of water calculated as the volume of a cylinder multiplied by 7.48 gallons/cubic foot.
Step 1. Determine the depth of water in the well: The company that constructed the well should be able to provide you with the well depth and water level. For example, let's say that you have a 50 feet deep well, and the water level is at 40 feet. The well contains 10 feet of water (50-40=10 feet). You can view this information in Figures 1, 2, and 3.
Step 2. Determine the volume of water in the well. You measured the inside diameter of the well and it was 30 inches. Find the gallons per foot of depth for a 30-inch well in Table I. For our example we would multiply the depth of the water in the well (10 feet) by 36.7 gallons of water per foot of water depth (from Table I) to get 367 gallons of well water (10 x 36.7 = 367 gallons of water in the well).
For large diameter wells or cisterns, contact the Division of Drinking Water and Environmental Sanitation at the Nebraska Department of Health for information on how to disinfect your system.
Step 3. Estimate the volume of water in the distribution system. Total up the water storage in the system, including the water heater, pressure tank, etc., and add 50 gallons for the pipeline. If you have a 30-gallon hot water heater and a 30-gallon pressure tank, you need to add 110 gallons for the distribution system.
Step 4. Determine the water contained in the entire system. Add the water volume in the well to the water contained in the distribution system to get 477 gallons (367 gallons in the well plus 110 gallons in the distribution system).
Step 5. Determine the amount of chlorine product required for a 200 ppm solution. Table II lists the product amounts needed to create a 200 ppm chlorine solution using typically available sources. If you decide to purchase laundry bleach, you will need 3 pints of bleach per 100 gallons of water in the well and distribution system. For our example, you would need to purchase 14 pints or 1.75 gallons of liquid laundry bleach. You would determine this by using the worksheet at the end of this article (477 gallons divided by 100, multiplied by 3 pints per 100 gallons, and divided by 8 pints per gallon is equal to 1.75 gallons).
Table II. Amount of chemical required to create a chlorine concentration of about 200 ppm.
Chemical name Amount per 100 gallons of water a
Liquid Laundry Bleach (5.25% NaOCl) 3 pints
Commercial Strength Bleach (12-17% NaOCl) 1 pint
Chlorinated Lime (25% CaOCl2) 11 ounces
Dairy Sanitizer (30% CaOCl2) 9 ounces
High-test calcium hypochlorite b (65-75% Ca(OCl)2) 4 ounces
aWell water containing iron, hydrogen sulfide, or organic substances may require more chemical to create a 200 ppm solution. Chlorine combines readily with these materials, making some of the chlorine ineffective as a disinfectant.
bHigh-test hypochlorite is available as a powder and as a tablet.
Step 6: Introduce the chlorine material into the well and distribution system. The best way to introduce chlorine material into the well is to dissolve the chlorine in a 5-gallon bucket of fresh water. Be sure the bucket is plastic and has been thoroughly washed. Then pour the chlorine solution into the well. Try to splash the solution on the sidewalls of the well casing as much as possible. Attach a hose to the water hydrant or faucet nearest the well and run water through the hydrant and back into the well (Figure 1). TStep 7: Let the chlorine disinfect the system. The most difficult step is to refrain from using water from the well so that the chlorine can disinfect the system. The system should remain idle for at least 2-3 hours, preferably overnight.
Step 8: Flush the system to remove the chlorine. After the water system chlorination has been completed, the entire system must be emptied of chlorine and thoroughly flushed with fresh water by running water out of each faucet or hydrant until the chlorine odor dissipates. Distribute the waste water on gravel roads or other areas without plants or aquatic life, which it might harm.
his will thoroughly mix the chlorine solution and well water.
Do not allow more than 50 gallons of chlorinated water to enter the septic system. If possible, attach a hose to outlets inside the house and distribute the water to a nongrass area away from the house. The chlorine will eventually evaporate into the atmosphere.
Step 9: Retest the water supply for bacterial contamination. The final step is to retest the water to ensure that the water source is bacteria free. Take a water sample 1-2 weeks after shock chlorinating the well, using the same procedures as before. Though most shock chlorination treatments are successful, do not drink the water until the laboratory results confirm that no bacteria are present. Retest the well every month for 2-3 months to be sure contamination is not reoccurring. If test results are negative, an annual water analysis program can be reinstated.
If the water supply continues to develop bacterial contamination problems after being shock chlorinated, continuous chlorination may be an option. Other options include repairing the well, or constructing a new well. It may be necessary to abandon the water source. Procedures for properly abandoning a well are explained in NebFact NF92-81, Plugging Abandoned Wells, available from your Cooperative Extension Office. You may want to contact a licensed water well contractor to perform these duties.
Chlorine Solution Calculation Worksheet
Calculate volume of water in well: Example: Your well:
1. Depth of casing: (See Figure 1) 50 feet __________feet
2. Depth to water: (See Figure 1) 40 feet __________feet
3. Total depth of water: (#1 - #2) 10 feet __________feet
4. Diameter of well: (Measure inside diameter) 30 inches __________inches
5. Volume of water per foot: (Table I, column 2) 36.7 gallons __________gallons
6. Total volume of water in casing: (#3 x #5) 367 gallons __________gallons
7. Volume of water in the system: 110 gallons __________gallons
8. Total volume of water:(#6 + #7) 477 gallons __________gallons
Calculate Amount of Chlorine Product for a 200 ppm Solution:
Chlorine product used: Liquid Laundry Bleach
9. Product needed per 100 gallons:
(Table II - circle the correct units) 3 (ounces/pints) __________(ounces/pints)
10. Total product needed:
(#8 x #9- circle the correct units) 14 (ounces/pints) __________(ounces/pints)
If you use chlorine as the oxidizing agent, it is important to note that any excess chlorine will stay in the water. While chlorine is an effective disinfecting agent, unpleasant taste results from too much chlorine. Using an activated carbon filter is an effective way to remove excess chlorine and improve taste.
The pH of the water supply should be considered when choosing an oxidizing agent. If the pH of the water is less than 6.5, a neutralizing treatment is needed before chemical oxidation. Chlorine bleach is the most effective for oxidizing iron if the pH level is 6.5 to 7.5. Consequently, chlorination is not recommended for treatment of high levels of manganese because a pH level of 9.5 or greater is required for complete manganese oxidation. Potassium permanganate can oxidize manganese at pH levels of 7.5 or higher and is also an effective method of oxidizing organic iron.
However, caution must be exercised with potassium permanganate because it is both a poison and a skin irritant. Furthermore, it is very important that no excess potassium permanganate be present in the water supply. In addition, caution must be exercised when storing the concentrated potassium permanganate to ensure that it is kept where children and animals cannot access it. If potassium permanganate is used, careful calibration, maintenance, and monitoring of your water treatment equipment
High levels of dissolved iron and manganese at combined concentrations up to 25 mg/l can be oxidized to a solid form by aeration (mixing with air). For domestic water processing, the "pressure-type aerator" often is used.
In this system, air is sucked in and mixed with the passing stream of water. This air-saturated water then enters the precipitator/aerator vessel where air separates from the water. From this point, the water flows through a filter where various filter media are used to screen out oxidized particles of iron, manganese and some carbonate or sulfate.
The most important maintenance step involved in operation is periodic backwashing of the filter. Manganese oxidation is slower than for iron and requires greater quantities of oxygen. Aeration is not recommended for water containing organic complexes of iron/manganese or iron/manganese bacteria that will clog the aspirator and filter.
Chemical oxidation followed by filtration
High levels of dissolved or oxidized iron and manganese greater than 10 mg/l can be treated by chemical oxidation, using an oxidizing chemical such as chlorine, followed by a sand trap filter to remove the precipitated material. Iron or manganese also can be oxidized from the dissolved to solid form by adding potassium permanganate or hydrogen peroxide to untreated water. This treatment is particularly valuable when iron is combined with organic matter or when iron bacteria is present.
The oxidizing chemical is put into the water by a small feed pump that operates when the well pump operates. This may be done in the well, but typically is done just before the water enters a storage tank. A retention time of at least 20 minutes is required to allow oxidation to take place. The resulting solid particles then must be filtered. When large concentrations of iron are present, a flushing sand filter may be needed for the filtering process.
If organic-complexed or colloidal iron/manganese is present in untreated water, a longer contact time and higher concentrations of chemicals are necessary for oxidation to take place. Adding aluminum sulfate (alum) improves filtration by causing larger iron/manganese particles to form.
When chlorine is used as the oxidizing agent, excess chlorine remains in treated water. If the particle filter is made of calcite, sand, anthracite or aluminum silicate, a minimum quantity of chlorine should be used to avoid the unpleasant taste that results from excess chlorine. An activated carbon filter can be used to remove excess chlorine and small quantities of solid iron/manganese particles.
Any filtration material requires frequent and regular backwashing or replacement to eliminate the solid iron/manganese particles. Some units have an automatic backwash cycle to handle this task.
The ideal pH range for chlorine bleach to oxidize iron is 6.5 to 7.5. Chlorination is not the method of choice for high manganese levels since a pH greater than 9.5 is required for complete oxidation. Potassium permanganate will effectively oxidize manganese at pH values above 7.5 and is more effective than chlorine oxidation of organic iron if that is a problem.
Potassium permanganate is poisonous and a skin irritant. There must be no excess potassium permanganate in treated water and the concentrated chemical must be stored in its original container away from children and animals. Careful calibration, maintenance and monitoring are required when potassium permanganate is used as an oxidizing agent.
Table I. Treatment of iron and manganese in drinking water
Indication Cause Treatment
Water clear when drawn but red-brown or black particles appear as water stands; red-brown or black stains on fixtures or laundry Dissolved iron or manganese Phosphate compounds (< 3 mg/l iron)
Water softener (<5 mg/l combined concentrations of iron and manganese)
Oxidizing filter (manganese greensand or zeolite) (<15 mg/l combined concentrations of iron and manganese)
Aeration (pressure) (<25mg/l combined concentrations of iron and manganese)
Chemical oxidation with potassium permanganate or chlorine; followed with filtration (>10 mg/l combined concentrations of iron and manganese)
Water contains red-brown particles when drawn; particles settle out as water stands Iron particles from corrosion of pipes and equipment Raise pH with neutralizing filter
Water contains red-brown or black particles when drawn; particles settle out as water stands Oxidized iron/manganese due to exposure of water to air prior to tap Particle filter (if quantity of oxidized material is high, use larger filter than inline; e.g., sand filter)
Red-brown or black slime appears in toilet tanks or from clogs in faucets Iron or manganese bacteria Kill bacteria masses by shock treatment with chlorine or potassium permanganate, then filter; bacteria may originate in well, so it may require continuous feed of chlorine or potassium permanganate, then filter
Reddish or black color that remains longer than 24 hours Colloidal iron/manganese; organically complexed iron/manganese Chemical oxidation with chlorine or potassium permanganate; followed with filtration
Adapted from "Iron and Manganese in Household Water," Water Treatment Notes. Fact Sheet 6, Cornell Cooperative Extension. (1989).
Estimate the water volume contained in the well casing using Table I and the "YOUR WELL" column of the following worksheet.
Table I. Volume of water contained per foot of well depth.
Well casing diameter (inches) Water volume per foot of
water depth (gallons)1
4 0.65
6 1.47
8 2.61
10 4.08
12 5.88
18 13.22
24 23.50
30 36.72
36 52.87
1Volume of water calculated as the volume of a cylinder multiplied by 7.48 gallons/cubic foot.
Step 1. Determine the depth of water in the well: The company that constructed the well should be able to provide you with the well depth and water level. For example, let's say that you have a 50 feet deep well, and the water level is at 40 feet. The well contains 10 feet of water (50-40=10 feet). You can view this information in Figures 1, 2, and 3.
Step 2. Determine the volume of water in the well. You measured the inside diameter of the well and it was 30 inches. Find the gallons per foot of depth for a 30-inch well in Table I. For our example we would multiply the depth of the water in the well (10 feet) by 36.7 gallons of water per foot of water depth (from Table I) to get 367 gallons of well water (10 x 36.7 = 367 gallons of water in the well).
For large diameter wells or cisterns, contact the Division of Drinking Water and Environmental Sanitation at the Nebraska Department of Health for information on how to disinfect your system.
Step 3. Estimate the volume of water in the distribution system. Total up the water storage in the system, including the water heater, pressure tank, etc., and add 50 gallons for the pipeline. If you have a 30-gallon hot water heater and a 30-gallon pressure tank, you need to add 110 gallons for the distribution system.
Step 4. Determine the water contained in the entire system. Add the water volume in the well to the water contained in the distribution system to get 477 gallons (367 gallons in the well plus 110 gallons in the distribution system).
Step 5. Determine the amount of chlorine product required for a 200 ppm solution. Table II lists the product amounts needed to create a 200 ppm chlorine solution using typically available sources. If you decide to purchase laundry bleach, you will need 3 pints of bleach per 100 gallons of water in the well and distribution system. For our example, you would need to purchase 14 pints or 1.75 gallons of liquid laundry bleach. You would determine this by using the worksheet at the end of this article (477 gallons divided by 100, multiplied by 3 pints per 100 gallons, and divided by 8 pints per gallon is equal to 1.75 gallons).
Table II. Amount of chemical required to create a chlorine concentration of about 200 ppm.
Chemical name Amount per 100 gallons of water a
Liquid Laundry Bleach (5.25% NaOCl) 3 pints
Commercial Strength Bleach (12-17% NaOCl) 1 pint
Chlorinated Lime (25% CaOCl2) 11 ounces
Dairy Sanitizer (30% CaOCl2) 9 ounces
High-test calcium hypochlorite b (65-75% Ca(OCl)2) 4 ounces
aWell water containing iron, hydrogen sulfide, or organic substances may require more chemical to create a 200 ppm solution. Chlorine combines readily with these materials, making some of the chlorine ineffective as a disinfectant.
bHigh-test hypochlorite is available as a powder and as a tablet.
Step 6: Introduce the chlorine material into the well and distribution system. The best way to introduce chlorine material into the well is to dissolve the chlorine in a 5-gallon bucket of fresh water. Be sure the bucket is plastic and has been thoroughly washed. Then pour the chlorine solution into the well. Try to splash the solution on the sidewalls of the well casing as much as possible. Attach a hose to the water hydrant or faucet nearest the well and run water through the hydrant and back into the well (Figure 1). TStep 7: Let the chlorine disinfect the system. The most difficult step is to refrain from using water from the well so that the chlorine can disinfect the system. The system should remain idle for at least 2-3 hours, preferably overnight.
Step 8: Flush the system to remove the chlorine. After the water system chlorination has been completed, the entire system must be emptied of chlorine and thoroughly flushed with fresh water by running water out of each faucet or hydrant until the chlorine odor dissipates. Distribute the waste water on gravel roads or other areas without plants or aquatic life, which it might harm.
his will thoroughly mix the chlorine solution and well water.
Do not allow more than 50 gallons of chlorinated water to enter the septic system. If possible, attach a hose to outlets inside the house and distribute the water to a nongrass area away from the house. The chlorine will eventually evaporate into the atmosphere.
Step 9: Retest the water supply for bacterial contamination. The final step is to retest the water to ensure that the water source is bacteria free. Take a water sample 1-2 weeks after shock chlorinating the well, using the same procedures as before. Though most shock chlorination treatments are successful, do not drink the water until the laboratory results confirm that no bacteria are present. Retest the well every month for 2-3 months to be sure contamination is not reoccurring. If test results are negative, an annual water analysis program can be reinstated.
If the water supply continues to develop bacterial contamination problems after being shock chlorinated, continuous chlorination may be an option. Other options include repairing the well, or constructing a new well. It may be necessary to abandon the water source. Procedures for properly abandoning a well are explained in NebFact NF92-81, Plugging Abandoned Wells, available from your Cooperative Extension Office. You may want to contact a licensed water well contractor to perform these duties.
Chlorine Solution Calculation Worksheet
Calculate volume of water in well: Example: Your well:
1. Depth of casing: (See Figure 1) 50 feet __________feet
2. Depth to water: (See Figure 1) 40 feet __________feet
3. Total depth of water: (#1 - #2) 10 feet __________feet
4. Diameter of well: (Measure inside diameter) 30 inches __________inches
5. Volume of water per foot: (Table I, column 2) 36.7 gallons __________gallons
6. Total volume of water in casing: (#3 x #5) 367 gallons __________gallons
7. Volume of water in the system: 110 gallons __________gallons
8. Total volume of water:(#6 + #7) 477 gallons __________gallons
Calculate Amount of Chlorine Product for a 200 ppm Solution:
Chlorine product used: Liquid Laundry Bleach
9. Product needed per 100 gallons:
(Table II - circle the correct units) 3 (ounces/pints) __________(ounces/pints)
10. Total product needed:
(#8 x #9- circle the correct units) 14 (ounces/pints) __________(ounces/pints)
If you use chlorine as the oxidizing agent, it is important to note that any excess chlorine will stay in the water. While chlorine is an effective disinfecting agent, unpleasant taste results from too much chlorine. Using an activated carbon filter is an effective way to remove excess chlorine and improve taste.
The pH of the water supply should be considered when choosing an oxidizing agent. If the pH of the water is less than 6.5, a neutralizing treatment is needed before chemical oxidation. Chlorine bleach is the most effective for oxidizing iron if the pH level is 6.5 to 7.5. Consequently, chlorination is not recommended for treatment of high levels of manganese because a pH level of 9.5 or greater is required for complete manganese oxidation. Potassium permanganate can oxidize manganese at pH levels of 7.5 or higher and is also an effective method of oxidizing organic iron.
However, caution must be exercised with potassium permanganate because it is both a poison and a skin irritant. Furthermore, it is very important that no excess potassium permanganate be present in the water supply. In addition, caution must be exercised when storing the concentrated potassium permanganate to ensure that it is kept where children and animals cannot access it. If potassium permanganate is used, careful calibration, maintenance, and monitoring of your water treatment equipment
Environmental Entrepreneur,Green Biz.NRN Murthy of Infosys says that we Indians are weak in execution.We need to realize the need and practice of gud project management. Form a group of competent Managers,Give them responsibilities and review the project from day One.
ATI KYA KHANDALA
From: Mehul Turakhia
Subject: aati kya khandala - in various languages , jus go through it
THIS ONE'S REALLY COOL.............
A Kya Bolti Tu
A Kya Mai Bolu
Sun
Suna
Ati Kya Khandala
Kya karu Ake mai Khandala
Are Ghumenge, nachenge, gayenge Aish karenge or kya ?
English :
Aye what do you say?
Aye what should I say?
Listen.
Speak on.
Coming to khandala?
What should I do, coming to khandala?
We'll roam, we'll loaf, we'll sing, we'll dance we"ll
freak, baby,what else?
Sanskrit : This is too good
Aye balike, twam katham kathisyasi
Aye balakah aham kim kathisyamh
Shrinvasi!
Shrunha
Kim twam khandaalaa agchasyasi
Aham kim kurwasyami khandaalayeh
gamisyami, bhramisyami, nryuthyami, gaayami, maja
karishma, kim karishyami?
Punjabi :
A ! ke boldi tu;
A ke mein bolan;
Sunh
Sunha
Chaldi khandala
Ki karaan ae ke mein khandala
Are Ghoomenge, Turainge, Naachenge, Gaavenge, Mauj
Karenge, Aur Ki ?
Gujarati :
Aye shun bole tu?
Aye hun shun bolu?
Sambhal
Sambhlaav
Aave chey su khandaalaa?
Shun karu aaviine khandaalaa?
Ghumshun, pharshun, naachshun, gaashun, majaa karshun,
beeju shun?
Marathi
Aye kaai tu mhantes?
Aye kaai mi mhanhu?
Aik
Aikav
Yetes kai khandaalaa?
Kai karu yevon mi khandaalaa?
Are ghumuyaa, phiruyaa, gavuyaa, nachuyaa, aish
karuyaa, aankhin kai?
! Kashmiri :
Heey, kya chaakh wannan
Heev, kya bhe wanneyyyy
Booz
Wanoo
Pakha telle khandalaa;
Kya karee weeteth bhe khandalaa
Pherevhey, nachevhey, geevevhey, khevevhey, eesh
karav, beyy kya?
Konkani :Aye ! kitte sangta tu?
Aye ! aao kite sangu?
Saang
Saan! gta
Khandalaa yeta ghi?
Khandalaa yevun kithe kharche?!
Bhovya, Phireya, Naachya, Gauya, maja korya, anikithe?
Bengali :
Ei ki bolis tui
Ei ki ar boli
Shon
Shonaa
Jabi ki khondalaa
K! i kori giye khondalaa
Are, ghurbo, phirbo, nachbo, gaibo, maja korbo ar ki?
**************************Want some
more?????***************
Malayalam :
Aye yenna pariyunnu?
Aye nyan yenna pariyu?
Keku
Pariyu
Varinno kh! andala?
Yendu cheyam? Nyaan vannu Khandaala?
Karangam, chuttam, paadam, aadam, maja
cheyyam,verendha?
Telugu :
Aye, ainte chaepphuta vu
Aye,ainte chaepala
Vinu! Chaeppu
Wastava Khandala
Yem Chesedhi? vacchi Khandala
Thiruguthamu, eguruthamu, aadthaamu, paadthaamu,maja
chesthamu inkemi?
Sindhi :
Aye cha thi c! haen tu?
Aye Maan chaa chavan?
Budh
Budhai
Acheti cha khandaalaa?
Cha kandis achi maan khandaalaa?
Are Ghumandasi, phirandasi, gayendasi,
Nachandasi,aaish kan! dasi, byo cha?
Magahi : (BIHARI)
A ki bolahin tu
A kya boliyuow hum
Sun
SunaowAaimahi ki khandala
Ki kariaow aake hum khandala
Gumbai, Phirbai, naachai, gaayii, aish karbai aur ki
Assamese:
ey ki kua tumi?
ey ki kom moi?
sun
suna
ahibi ki khandala?
ki korim aahi moi kahandalaa
are ghurim,phirim,nasim,gaam,khub phurti korim aru ki?
Tamil:
Enna solre
Ennatha solla
mudalla kelu,
sari sollu
Kandala variya
kandala poi enna panrathu
Vera enna .oor suthuvom aaduvom paaduvom jalsa
pannuvom
******If you have reached upto this stage, 't seems
you dont have work, rite? Then have some
more...!!!!*******************
Foreign Languages :
German :
Was sagst du?
Was soll ich sagen?
Hor mal!
Sag mal!
Kommst Nach Khandala?
Was machen wir in Khaldala?
Wir gehen, spazieren, tanzen, singen, haben spaCx,
was noch?
Spanish :
Tu que deceas?
Yo que deseo?
Oye
Di me
Vas a tu khandaalaa?
Que haceo, yo voy en el khandaalaa?
Viajamos, vagabundeamos, bailamos, cantamos,
disfrutamos, si no.
Chinese :
Ain, Chon Zuan Ho?
Ain, Chon Hee Zuano?
Sui,
Suion,
Hyuan Chon Khandala?
Chon Tsuani Hyui Hee Khandala?
Chijuan, Kajuan, Marijuan, Siuan, Samshuan
Tsuaniya Tsu Chon?
Russian :
Aeich, Kov Speache niv?
Aeich, Kov miv Speache?Nuushev,!
Nuusheva,
Comeva Kov Khandala?
Kov Sheychev Comov miv Khandala! ?
Rotiv, Rotrach, Balleva, Opereacha, Enjova
Sheychevin, Kov
Gobraich?
French :!
Aye! qu'est-ceque tu dis?
Aye! qu'est-ceque tu me vouler dire?
Entendre
Entendrez
Est-ceque tu viens a la Khandala
Qu'est-ceque je fais a aller a la Khandala ?
Promenez,! Allez, Dansez, Chantez a quelle?
Zambesi : (African)
Aye, Zwa To Zulu,
Aye, Zwa Ze ! Zu! lu,
Wahte,
Kaso,
Heliyo To Khandaalaa?
Zwa Kumi, Helithe Khandaalaa?!
Himala, Romala, Wahwahla, Infala, Kumaya Kumana, Ni
---------------------------------
From: Akshay Jain
Subject: AIR INDIA
Surinder's uncle was booked into an SIA flight to
Bombay. But as this was his first time in an airplane,
he made a few preparations that were out of place.
When the stewardess came around to take orders for the
in-flight meal, the uncle declared loudly, "I have
brought my own lunch. Make sure you don't charge me
for food and drinks!"
So, as everybody was given their in-flight meal, the
uncle began spreading out his own home-cooked meal.
The man sitting next to him was an American history
researcher, who was curious about the food. "Excuse
me, what is that drink?" he asked.
The uncle picked up the yogurt-based lassi drink and
said, "Milk of India!"
The the uncle took out several pieces of chapattis and
started feasting. "And what is that dish?" asked the
curious American.
"Wheat of India!" replied the uncle proudly.
Finally, the uncle took out some desserts. He offered
some to the American.
"What is it?" asked the American.
"Sweet of India!" replied the old man.
After the meal, everyone was settling down when there
was a loud "Pooooooooot!" from the uncle.
"What was that?" asked the American in disgust.
The old man replied coolly, "That's Air India!"
)
From: ">< JiTeN ><"
Subject: WAYS TO PROPOSE
1. (Walk up behind girl and point fingers shaped like gun into her back)
You're under arrest! ;
(For what?)
For stealing my heart
2. Hi, my name is Chance, Do I have one?
3. are your legs tired?
( girl: Why?)
because you have been running through my mind all day!
4. I lost my phone number, can I borrow yours?
5. Can you give me directions to your heart?
I've seemed to have lost myself in your eyes.
6. (Take a look at the tag on the girls shirt, jacket, etc.);
She would say ; What are doing
& respond,Oh, just checking to see if you were made in Heaven.
7. (Pick up a flower and walk over to girl.)
I was just showing this flower how beautiful you are.
8. Is it hot in here or is it just you?
9. Walk up to a girl and say: Are you from Greece?
She answers.
Oh, I thought all the goddesses were from Greece...
10. I could be born in your eye, run down your cheek,
and & die on your lips.
11. Did you know they changed the alphabet?
They put U and I together.
12. Are you lost?
'cause it's so strange to see an angel so far from heaven.
13. Do you believe in love at first sight,
or do I have to walk by you again?
14. What's that in your eye? Oh...it's a sparkle.
15. Do you have a map? I just got lost in your eyes.
16. You can forget about going to heaven because it's
a sin to look that good.
17. If I had eleven roses and you, I'd have a dozen
!!~@ JiTeN @~!!
Subject: aati kya khandala - in various languages , jus go through it
THIS ONE'S REALLY COOL.............
A Kya Bolti Tu
A Kya Mai Bolu
Sun
Suna
Ati Kya Khandala
Kya karu Ake mai Khandala
Are Ghumenge, nachenge, gayenge Aish karenge or kya ?
English :
Aye what do you say?
Aye what should I say?
Listen.
Speak on.
Coming to khandala?
What should I do, coming to khandala?
We'll roam, we'll loaf, we'll sing, we'll dance we"ll
freak, baby,what else?
Sanskrit : This is too good
Aye balike, twam katham kathisyasi
Aye balakah aham kim kathisyamh
Shrinvasi!
Shrunha
Kim twam khandaalaa agchasyasi
Aham kim kurwasyami khandaalayeh
gamisyami, bhramisyami, nryuthyami, gaayami, maja
karishma, kim karishyami?
Punjabi :
A ! ke boldi tu;
A ke mein bolan;
Sunh
Sunha
Chaldi khandala
Ki karaan ae ke mein khandala
Are Ghoomenge, Turainge, Naachenge, Gaavenge, Mauj
Karenge, Aur Ki ?
Gujarati :
Aye shun bole tu?
Aye hun shun bolu?
Sambhal
Sambhlaav
Aave chey su khandaalaa?
Shun karu aaviine khandaalaa?
Ghumshun, pharshun, naachshun, gaashun, majaa karshun,
beeju shun?
Marathi
Aye kaai tu mhantes?
Aye kaai mi mhanhu?
Aik
Aikav
Yetes kai khandaalaa?
Kai karu yevon mi khandaalaa?
Are ghumuyaa, phiruyaa, gavuyaa, nachuyaa, aish
karuyaa, aankhin kai?
! Kashmiri :
Heey, kya chaakh wannan
Heev, kya bhe wanneyyyy
Booz
Wanoo
Pakha telle khandalaa;
Kya karee weeteth bhe khandalaa
Pherevhey, nachevhey, geevevhey, khevevhey, eesh
karav, beyy kya?
Konkani :Aye ! kitte sangta tu?
Aye ! aao kite sangu?
Saang
Saan! gta
Khandalaa yeta ghi?
Khandalaa yevun kithe kharche?!
Bhovya, Phireya, Naachya, Gauya, maja korya, anikithe?
Bengali :
Ei ki bolis tui
Ei ki ar boli
Shon
Shonaa
Jabi ki khondalaa
K! i kori giye khondalaa
Are, ghurbo, phirbo, nachbo, gaibo, maja korbo ar ki?
**************************Want some
more?????***************
Malayalam :
Aye yenna pariyunnu?
Aye nyan yenna pariyu?
Keku
Pariyu
Varinno kh! andala?
Yendu cheyam? Nyaan vannu Khandaala?
Karangam, chuttam, paadam, aadam, maja
cheyyam,verendha?
Telugu :
Aye, ainte chaepphuta vu
Aye,ainte chaepala
Vinu! Chaeppu
Wastava Khandala
Yem Chesedhi? vacchi Khandala
Thiruguthamu, eguruthamu, aadthaamu, paadthaamu,maja
chesthamu inkemi?
Sindhi :
Aye cha thi c! haen tu?
Aye Maan chaa chavan?
Budh
Budhai
Acheti cha khandaalaa?
Cha kandis achi maan khandaalaa?
Are Ghumandasi, phirandasi, gayendasi,
Nachandasi,aaish kan! dasi, byo cha?
Magahi : (BIHARI)
A ki bolahin tu
A kya boliyuow hum
Sun
SunaowAaimahi ki khandala
Ki kariaow aake hum khandala
Gumbai, Phirbai, naachai, gaayii, aish karbai aur ki
Assamese:
ey ki kua tumi?
ey ki kom moi?
sun
suna
ahibi ki khandala?
ki korim aahi moi kahandalaa
are ghurim,phirim,nasim,gaam,khub phurti korim aru ki?
Tamil:
Enna solre
Ennatha solla
mudalla kelu,
sari sollu
Kandala variya
kandala poi enna panrathu
Vera enna .oor suthuvom aaduvom paaduvom jalsa
pannuvom
******If you have reached upto this stage, 't seems
you dont have work, rite? Then have some
more...!!!!*******************
Foreign Languages :
German :
Was sagst du?
Was soll ich sagen?
Hor mal!
Sag mal!
Kommst Nach Khandala?
Was machen wir in Khaldala?
Wir gehen, spazieren, tanzen, singen, haben spaCx,
was noch?
Spanish :
Tu que deceas?
Yo que deseo?
Oye
Di me
Vas a tu khandaalaa?
Que haceo, yo voy en el khandaalaa?
Viajamos, vagabundeamos, bailamos, cantamos,
disfrutamos, si no.
Chinese :
Ain, Chon Zuan Ho?
Ain, Chon Hee Zuano?
Sui,
Suion,
Hyuan Chon Khandala?
Chon Tsuani Hyui Hee Khandala?
Chijuan, Kajuan, Marijuan, Siuan, Samshuan
Tsuaniya Tsu Chon?
Russian :
Aeich, Kov Speache niv?
Aeich, Kov miv Speache?Nuushev,!
Nuusheva,
Comeva Kov Khandala?
Kov Sheychev Comov miv Khandala! ?
Rotiv, Rotrach, Balleva, Opereacha, Enjova
Sheychevin, Kov
Gobraich?
French :!
Aye! qu'est-ceque tu dis?
Aye! qu'est-ceque tu me vouler dire?
Entendre
Entendrez
Est-ceque tu viens a la Khandala
Qu'est-ceque je fais a aller a la Khandala ?
Promenez,! Allez, Dansez, Chantez a quelle?
Zambesi : (African)
Aye, Zwa To Zulu,
Aye, Zwa Ze ! Zu! lu,
Wahte,
Kaso,
Heliyo To Khandaalaa?
Zwa Kumi, Helithe Khandaalaa?!
Himala, Romala, Wahwahla, Infala, Kumaya Kumana, Ni
---------------------------------
From: Akshay Jain
Subject: AIR INDIA
Surinder's uncle was booked into an SIA flight to
Bombay. But as this was his first time in an airplane,
he made a few preparations that were out of place.
When the stewardess came around to take orders for the
in-flight meal, the uncle declared loudly, "I have
brought my own lunch. Make sure you don't charge me
for food and drinks!"
So, as everybody was given their in-flight meal, the
uncle began spreading out his own home-cooked meal.
The man sitting next to him was an American history
researcher, who was curious about the food. "Excuse
me, what is that drink?" he asked.
The uncle picked up the yogurt-based lassi drink and
said, "Milk of India!"
The the uncle took out several pieces of chapattis and
started feasting. "And what is that dish?" asked the
curious American.
"Wheat of India!" replied the uncle proudly.
Finally, the uncle took out some desserts. He offered
some to the American.
"What is it?" asked the American.
"Sweet of India!" replied the old man.
After the meal, everyone was settling down when there
was a loud "Pooooooooot!" from the uncle.
"What was that?" asked the American in disgust.
The old man replied coolly, "That's Air India!"
)
From: ">< JiTeN ><"
Subject: WAYS TO PROPOSE
1. (Walk up behind girl and point fingers shaped like gun into her back)
You're under arrest! ;
(For what?)
For stealing my heart
2. Hi, my name is Chance, Do I have one?
3. are your legs tired?
( girl: Why?)
because you have been running through my mind all day!
4. I lost my phone number, can I borrow yours?
5. Can you give me directions to your heart?
I've seemed to have lost myself in your eyes.
6. (Take a look at the tag on the girls shirt, jacket, etc.);
She would say ; What are doing
& respond,Oh, just checking to see if you were made in Heaven.
7. (Pick up a flower and walk over to girl.)
I was just showing this flower how beautiful you are.
8. Is it hot in here or is it just you?
9. Walk up to a girl and say: Are you from Greece?
She answers.
Oh, I thought all the goddesses were from Greece...
10. I could be born in your eye, run down your cheek,
and & die on your lips.
11. Did you know they changed the alphabet?
They put U and I together.
12. Are you lost?
'cause it's so strange to see an angel so far from heaven.
13. Do you believe in love at first sight,
or do I have to walk by you again?
14. What's that in your eye? Oh...it's a sparkle.
15. Do you have a map? I just got lost in your eyes.
16. You can forget about going to heaven because it's
a sin to look that good.
17. If I had eleven roses and you, I'd have a dozen
!!~@ JiTeN @~!!
Environmental Entrepreneur,Green Biz.NRN Murthy of Infosys says that we Indians are weak in execution.We need to realize the need and practice of gud project management. Form a group of competent Managers,Give them responsibilities and review the project from day One.
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