COPY RIGHTS : TO AVOID COPYRIGHT VIOLATIONS, ALL POSTS ARE SHOWN ALONG WITH SOURCES FROM WHERE ITS TAKEN. PLEASE CONTACT ME IN MY EMAIL SALEEMASRAF@GMAIL.COM , IF YOU ARE THE AUTHOR AND YOUR NAME IS NOT DISPLAYED IN THE ARTICLE.THE UNINTENTIONAL LAPSE ON MY PART WILL BE IMMEDIATELY CORRECTED.

I HAVE SHARED ALL MY PRACTICAL WATER TREATMENT EXPERIENCES WITH SOLVED EXAMPLE HERE SO THAT ANYBODY CAN USE IT.

SEARCH THIS BLOG BELOW FOR ENVO ,COMPACT STP,ETP,STP,FMR,MBBR,SAFF,IRON,ARSENIC,FLUORIDE,FILTER,RO,UASB,BIO GAS,AERATION TANK,SETTLING TANK,DOSING,AMC.

SEARCH THIS BLOG

Wednesday, January 27, 2010

Laboratory Scale Bio Gas Plant





STARTING UP A BIO GAS PLANT

POST NUMBER :08   Date : 02/05/2004
BIO GAS PLANT PROCESS DESCRIPTION:

FLOW CHART: CRUSHER(less than 7mm particle size)----thermophilic Aerobic digester(Temp 55 degree C)---Mesophilic Anaerobic Digester(37 Degree C and pH at 7.5)---Manure Pit

Biotechnology process
stage one : hydrolysis by hydrolytic bactaria, conversion of extracellular molecules
stage two : thermophilic fermentation based on carbohydrates
stage three : synthesis of volatile fatty acids by acetogenic bacteria
stage four : synthesis of methane by methanogenic organisms

STARTING UP A BIO GAS PLANT:


OPERATION OF BIO GAS PLANT

FLOW CHART: CRUSHER(less than 7mm particle size)----thermophilic Aerobic digester(Temp 55 degree C  pH  5.5)---Mesophilic Anaerobic Digester(37 Degree C and pH at 7.5)---Manure Pit


Aspect
Bottlenecks
Remarks
CONTROLS
Check for Gas leaks
Check hood , pipe etc. Monthly checking of leakage by pressure system and or with soap water
Cow dung slurry
Make slurry of cow dung and fresh water in the ratio 2kg dung 15 liter water (thumb rule 10% dung of water volume). Fill up the bio digester with the slurry.
Slurry fermentation
Wait for slurry to form gas. It normally takes 3 to ten days.Gas formation can be seen by rising of floating dome or pressure gauge in fixed dome.
Start of Feeding
Start fresh feeding after formation of gas. Start with small quantity of feed material in 1:1 ratio. After 15 days, start feeding full capacity.
Complete Release of first gas produced
Gases should be released to the atmosphere at least three  times at a gap of three days each.
It may be needed to be released more till methane percentage of 60% reached .Do a sample bio gas test to know exact position of gas produced.
Technical
Improper preparation of influent solids
leading to blockage and scum formation
Proper milling and other treatment measures (pre-
soaking, adjustment of C/N ratio); removal of inert
particles: sand and stone.
Temperature fluctuations
Careful regulation of temperature through use of
incorporation of auxiliary solar heating system.
Maintenance of pH for optimal growth of
Methanogenic bacteria
C/N ratio
Appropriate choice of raw material, regulation of
C/N ratio and dilution rate.
Appropriate mixing of N-rich and N-poor
substrates with cellulosic substrates.
Dilution ratio of influent solids content
Appropriate treatment of raw materials to avoid
stratification and scum formation.
Retention time of slurry
Dependent upon dilution ratio, loading rate,
digestion temperature.
Loading rate
Dependent upon digester size, dilution ratio,
digestion temperature.
Seeding of an appropriate bacterial
Population for biogas generation
Development of specific and potent cultures.
Corrosion of gas holder
Construction from cheap materials (glass fibre,
clay, jute-fibre reinforced plastic) and/or regular
cleaning and layering with protective materials
(e.g., lubricating oil).
Pin-hole leakages (digester tank, holder,
inlet, outlet)
Establishment of "no leak" conditions, use of
external protective coating materials (PVC,
creosotes
Occurrence of CO2 reducing calorific
value of biogas
Reduction in CO2 content through passage in
lime-water
Occurrence of water condensate in gas
supply system (blockage, rusting)
Appropriate drainage system using condensate
traps
Occurrence of H2S leading to corrosion
On a village scale, H2S removed by passing over
ferric oxide or iron filings
Improper combustion
Proper air gas  mixing appliances necessary
Maintenance of gas supply at constant
pressure
Regulation of uniform distribution and use of gas;
removal of water condensate from piping systems;
appropriate choice of gas holder in terms of weight
and capacity
Residue
utilization
Risks to health and plant crops resulting
from residual accumulation of toxic materials
and encysted pathogens
Avoid use of chemical industry effluents; more
research on type, nature, and die-off rates of
persisting organisms; minimize long transportation
period of un-dried effluent
Health
Hazards to human health in transporting
night soil and other wastes (gray-water)
Linkage of latrine run-offs into biogas reactors
promotes non-manual operations and general
aesthetics
Safety
Improper handling and storage of methane
Appropriate measures necessary for plant
operation, handling, and storage of biogas through
provision of extension and servicing facilities


DO NOT USE eggshells, Onion peels or left-over bones in this system as they will affect the efficient functioning of the system
Hazards: Methane in a concentration of 6 to 15 percent with air is an explosive mixture. Since it is lighter than air, it will collect in rooftops and other enclosed areas. It is relatively odorless and detection may be difficult. Extreme caution and special safety features are necessary in the digester design and storage tank


Monday, January 18, 2010

how to make friends on facebook

1. ADD GIRLS YOU THINK ARE CUTE
Spend a couple of hours per week, adding 5 to 10 girls you think are cute or really hot as a friend. Write an intriguing opening line in the “add message” box that pops up.
If you can’t think of anything funny or intriguing to say, just forget the message and add her as a friend anyway. Make sure your photos are up to date – Keep them fresh, like within the last couple of months .No nude girl photos in your album.

2. GET FAMILIAR WITH HER PAGE
Spend 15 minutes skimming through her about page, interests, past wall posts in her timeline and photos. Just get a good understanding of who she is, what she’s about and how she interacts with her friends.This will give you a better overview of her.
3. COMMENT ON NEW PHOTOS, VIDEOS AND STATUS UPDATES
When she posts a new photo, video or status update that you like, comment on it with a funny or positive message. Keep doing this for about 3 weeks, so she becomes familiar with you. Always post a funny comment or don’t post anything at all. Women like funny guys but if you’re always trying to be funny, it can wear thin pretty quickly. So use the funny lines every so often
4. SEND THE FIRST MESSAGE
After you’ve posted a few comments and liked her status updates, photos, videos etc, go ahead and message her to get the ball rolling.
Keep it brief, ask her opinion on something, so that she will likely respond. Women just can’t resist offering advice, it’s like breathing for them.If she responds to every message, it means she like you… so keep it up. Each message should be short and sweet, but you should be trying to connect with her. Try to really understand what she lives for, how she feels, and who she really is. Go with that goal and your conversations will be more interesting and connected.
Your personal space is your personal space. Respect it.NEVER SHARE PERSONAL THINGS ON FACEBOOK. A rule of thumb is to announce in FACEBOOK only the positive - a new job, a celebration or new degree. Steer clear of washing dirty linen in public. Do not talk about your bad day at work , about your boss , client or your unpleasant marriage. Remember: 500 friends of friends do not need to know.

Sunday, January 17, 2010

bio gas design NABARD

bio gas design NABARD