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Tuesday, September 11, 2007

EM Technology Of Waste Water Treatment

TREATMENT AND DISPOSAL OF FOOD COURT WASTE.

The waste water quality from food courts could be broadly summarized as follows:

pH 5,7 to 8,4;

BOD 250-300 ppm

COD 350--450 mg / L;

suspended solids 200-350 mg / L;

Oil & Grease 20-50 ppm

GURANTEED PARAMETERS OF TREATED WATER

The parameters of the treated effluent water will be Guaranteed as under meeting norms of Pollution control board.

S.No.

Parameter

Unit

Value

pH

7.0 – 8.0

Total Suspended Solids

Mg/l

< 100

B.O.D.

Mg/l

< 30

C.O.D.

Mg/l

< 250

Oil & Grease

Mg/l

< 10

SOURCES OF WASTE

Sources of pollution from food courts:

  1. Wash Area.
  2. Restaurant
  3. Kitchen

Total Flow = 20,000 Liter Per Day

Working Hours : 16 hours

Flow rate : 1250 liter per hour

EM Technology Of Waste Water Treatment Adopted:

EM - short for "Effective Micro-organisms.

EM is a liquid culture of aerobic and anaerobic micro-organisms mainly sourced from human food processing and from nature. It consists of lactobacilli, yeast, photosynthetic bacteria, ray fungi and filamentous fungi. It does not contain any genetically modified organisms, is safe and easy to handle, and harmless to human health even if accidentally ingested.

EM offers benefits in the following fields of activities: Solid waste management, sewage and effluent treatment, hazardous waste treatment, hygiene management, and environmental regeneration.

METHOD OF PREPARATION OF EM SOLUTION:

One liter of EM stock solution and 1 kg or 1 liter of organically grown jaggery (or of molasses) are to be mixed with 20 liters of water. The water has to be clean and free from chlorine. The container should be of food-grade plastic. (Glass or metal containers are not appropriate as the development of gas may cause the container to break or explode.). It should be clean, not contaminated with chemicals, and have an airtight lid. As little air as possible should be left in the container (between the liquid and the lid). As gas pressure will develop, the lid will have to be opened everyday for a second to release it.

For the period of activation, in tropical regions such as Tamil Nadu, the container has to be placed in shade at ambient temperatures (20-40 degrees Celsius) without exposure to strong temperature fluctuations. Depending on actual ambient temperatures, extended EM (abbreviated as EMe or EMa) will be ready after five to ten days: This is verified by a pH of or lower than 3.5 and a pleasant sweet-sour smell.

Thus from one liter of EM stock solution and one kg (or liter) of jaggery, 22 liters activated EM solution ready for use can be produced. In hygiene, EMa is being used full strength or in dilution with water up to 1:100, in farming in dilutions ranging from 1:200 to 1:1,000, and in wastewater treatment diluted (with effluent or sewage) up to several thousand times. With one liter of EM stock solution, 2,200 liters (if EMa is diluted 1:100) or 22,000 liters (if EMa is diluted 1:1,000) of solution can be produced, and even bigger volumes of effluents can be treated.

UNIT PROPOSED FOR EFFLUENT TREATMENT PLANT :

Best management practices which broadly applies in terms of treatment include:

1.Fat / oil removal by flotation; manually Oil is removed daily .One oil trap is provided each for Mcdonald stream and Kwality stream. The outlet from the oil traps are fed to the upflow anaerobic Bio Reactor..

2. Upflow Anaerobic Bio Reactor.

The effluent will flow by gravity from the oil trap chamber at an average flow rate to the Biological reactor. The biological reactor is fed with 200 Liter of EM solution.

This is basically upflow anaerobic bio reactor.

The clarified wastewater collected from the collection launder of reactor is pumped out.

Area requirement :

The ETP is located in a area outside the building premises of 25 mt x 10 mt area earmarked by the party near the work place.

9 comments:

Sarika said...

This is really a good blog. I have one question. From where can we procure EM stock solution.

Thanks

vasudev said...

Hello,

Go to google search and enter Consolidated Agritech Co; . You will get all information on EM.

Nandan

JITENDRA said...

call me, for EM or AEM on 9903994404,

jitendra singh, kolkata

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