Table of Contents
- 1 What is the permissible limit of BOD and COD in wastewater?
- 2 What are the parameters in wastewater treatment?
- 3 What is the acceptable range of BOD in drinking water?
- 4 What is standard value of COD?
- 5 What are the wastewater quality parameters?
- 6 What are the water quality parameters?
- 7 Is Cod a water quality parameter?
- 8 What is the permissible limit of cod?
- 9 Why is the BOD5 test not used in wastewater treatment?
- 10 What is the difference between cod and BOD ratio?
What is the permissible limit of BOD and COD in wastewater?
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 in wastewater treatment?
The most frequently used parameters are: Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Organic Carbon (TOC), Alkalinity, Chlorides, Nitrogen, Oil and Grease, Dissolved Oxygen, pH, Phosphorus, Gases, Sulphur, Solids, Temperature, Metals as well as Micro-organisms.
What is the value of COD for drinking water?
All Answers (5) The concentrations of COD observed in surface waters range from 20 mg/l O2 or less in unpolluted waters to greater than 200 mg/l O2 in waters receiving effluents. Industrial wastewaters may have COD values ranging from 100 mg/l O2 to 60,000 mg/ O2.
What is the acceptable range of BOD in drinking water?
Drinking water should have after 5 days a BOD of well below 1 mg/l. Acceptable wastewater from a sewage treatment plant should have a BOD of around 20 mg/l.
What is standard value of COD?
The COD of surface water normally ranges from 5 to 20 mg l−1. The COD as standardized method has found its way into wastewater legislation.
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 are the wastewater quality parameters?
Biochemical oxygen demand (BOD), chemical oxygen demand (COD), total dissolved solids (TDS) and total suspended solids (TSS) are the most commonly regulated wastewater effluent parameters.
What are the water quality parameters?
Water quality parameters include chemical, physical, and biological properties and can be tested or monitored based on the desired water parameters of concern. Parameters that are frequently sampled or monitored for water quality include temperature, dissolved oxygen, pH, conductivity, ORP, and turbidity.
Is COD a water quality parameter?
COD is a water quality measure used not only to determine the amount of biologically active substances such as bacteria but also biologically inactive organic matter in water [8]. It is an important and rapidly measured variable for characterizing water bodies, sewage, industrial wastes, and treatment plant effluents.
Is Cod a water quality parameter?
What is the permissible limit of cod?
7. These regulations shall come into operation on 01 September 2003….
| Parameter | Unit | Maximum permissible limit |
|---|---|---|
| Chemical Oxygen Demand (COD) | mg/l | 120 |
| Biochemical Oxygen Demand (BOD5) | mg/l | 40 |
| Chloride | mg/l | 1500 |
| Sulphate | mg/l | 1500 |
What is BOD and cod in wastewater?
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.
Why is the BOD5 test not used in wastewater treatment?
When microorganisms become poisoned by toxic substances, they are unable to oxidize waste, in which case the BOD5 test becomes an ineffective measure of organic pollution. Most industrial wastewater treatment plants use chemical oxygen demand (COD) rather than the BOD5 test.
What is the difference between cod and BOD ratio?
All Answers (107) COD is a measure of total organic molecules dissolved in waste water, Where as The concept of BOD came after cities started dumping their waste water into the water bodies and this led to depletion of oxygen and then death of water bodies.BOD/COD ratio is a measure of food value.
Is BOD-COD ratio a good indicator for pollution measurement in River?
Results of the investigation revealed that BOD: COD ratio is a good indicator for pollution measurement in river. It can be used as an indicator to predict the relationship of BOD and COD in the river. It is also found to be reliable and useful indicator to relate organic matter content in the river water.
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