What are the parameters of effluent discharge?
parameters of the effluent do not exceed the permissible limits set out in the Second Schedule….
| Parameter | Unit | Maximum permissible limit |
|---|---|---|
| Nitrate as N | mg/l | 10 |
| Total Kjeldahl Nitrogen (TKN) | mg/l | 25 |
| Nitrite as N | mg/l | 1 |
| Aluminium | mg/l | 5 |
What are the effluent standards?
Effluent standards are concentrations of pollutants expressed in terms of parts per million for waste water discharged through outfall pipes from publicly owned sewage treatment plants or industrial plants.
What are the standard limits for BOD and COD?
According to standards of Central Pollution Control Board, permissible value of BOD is 30 mg/l and COD is 250 mg/l.
What are the parameters of STP?
The treated parameters in STP include: 1….
| Parameter | Required Standards |
|---|---|
| pH | 6.5-8.5 |
| Suspended Solids | <10mg/l |
| Ammonia Nitrogen | <5mg/l |
| Fecal Coliform | <100 MPN/100ml |
Who permissible wastewater limits?
The WHO recommended safe limits of Hg in wastewater and soils for agriculture are 0.0019 and 0.05 ppm respectively10.
What is permissible limit of BOD?
The Central Pollution Control Board has prescribed the limit of BOD for the discharge of industrial and municipal waste in order to regulate the water pollution and for efficient water treatment, and it is <10 ppm.
What is BOD and COD in ETP?
The biochemical oxygen demand (BOD) represents the amount of dissolved oxygen (DO) consumed by biological organisms when they decompose organic matter in water. The chemical oxygen demand (COD) is the amount of oxygen consumed when the water sample is chemically oxidised.
What is the permissible limit of BOD in wastewater?
According to WHO for drinking water BOD limit is less than < 5.0 mg/l at this limit BOD will not cause any harmful impacts on human body, wastewater sewage must has BOD around 80 ppm and COD 200 ppm for discharge in see.
What is BOD and COD parameters?
Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) are two of the most important parameters to characterise (measure the degree of pollution) of wastewater. BOD, the biological demand for oxygen a source of water has, is the amount of oxygen used by microorganisms to break down organic substances.
What is COD BOD ratio?
The ratio COD/BOD is defined as the portion of biodegradable organics compared to total (bio + non bio) degradable organics. This ratio is generally greater than 1, but can be equal to 1 if sample has only biodegradable organics.
What is BOD limit in wastewater?
In general, maximum allowable concentration for direct environmental wastewater discharge fall around 10 mg/L BOD and maximum allowable concentrations for discharge to sewer systems around 300 mg/L BOD.
What is the minimum percentage of solid in wastewater?
What is the minimum percentage of solids in wastewater? Explanation: The organic matter consists mainly of proteins, carbohydrates and fats. Between 40 and 65 % of the solids in an average wastewater are suspended.
What is the minimum value of BOD in polluted water?
Clean water has BOD value less than 5 ppm. Polluted water has BOD value higher than 10 ppm.
What is the limit of BOD on discharge of wastewater on the surface water?
What is standard BOD?
Concept: Biochemical oxygen demand (B.O.D.): It is the amount of dissolved oxygen needed by aerobic biological organisms in a body of water or wastewater sample to break down organic material present in a given water or wastewater sample at certain temperature (20˚C) over a specific time period (5 days).
In which water BOD is maximum?
Notes: BOD is amount of dissolved oxygen needed by aerobic biological organisms in a body of water to break down organic material present in a given water sample at certain temperature over a specific time period, for running rivers, it would be minimum and for Untreated Municipal waste water it would be maximum.
What is the ratio of COD to BOD?
The ratio between BOD to COD is variable with season and geographical location. generally it is 0.4 – 0.45 in summer and increases 0.3 – 0.35 in winter. Depend on the type of your wastewater can vary from 0.6 to 0.8, this rate can be consider biodegradable (biological treatment is recommended).
What is the BOD of normal water?
Drinking water has a BOD level of 1 – 2 ppm. When the BOD value of water is in the range 3 – 5 ppm, the water is moderately clean. Polluted water has a BOD value in the range of 6 – 9 ppm. In polluted water, some organic waste is present.