No, BOD is always less or equal to COD, since BOD gives you only the biodegradable organic content of a aquatic sample, while COD gives you the biodegradable and the non-biodegradable organic content, thus the total organic content.
Is it possible to obtain the same COD and BOD value for a sample?
Simply BOD indicates the biodegradable organic matter (OM) while COD represents both biodegradable and non-biodegradable OM in water. If all OM is your sample is biodegradable, so BOD will approximately equal COD.
COD is closely related to BOD or Biochemical Oxygen Demand, the difference being that BOD is a test of the level of organic matter that can be biologically oxidised while COD is a test of the amount of organic matter that can be chemically oxidised.
Can COD be higher than BOD?
Why is COD higher than BOD? COD is always higher than BOD because chemical oxidation is easier than biological oxidation.
Why COD is always higher than BOD for the same waste water sample?
The COD test uses a chemical (potassium dichromate in a 50% sulfuric acid solution) that “oxidizes” both organic (predominate) and inorganic substances in a wastewater sample, which results in a higher COD concentration than BOD concentration for the same wastewater sample since only organic compounds are consumed
Why are BOD values lesser than COD values?
No, BOD is always less or equal to COD, since BOD gives you only the biodegradable organic content of a aquatic sample, while COD gives you the biodegradable and the non-biodegradable organic content, thus the total organic content.
What is the relationship between the COD and BOD values in waste water?
COD results are typically higher than BOD5 values, and the ratio between them will vary depending on the characteristics of the wastewater. This ratio has been commonly used as an indicator for biodegradation capacity [1]. It is called “Biodegradability index” (B.I.).
What is the ratio of BOD and COD of water?
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).
Which of the following shows the correct relationship BOD and COD?
The only relation between COD & BOD is – COD > BOD. For most industrial process waste water, community sewage, drains and even some hetrogeneous sources, COD/BOD ratio has been found to be in a defined range and hence, COD result gives more or less BOD value range for such identifiable waste water.
What does BOD COD ratio mean?
The BOD to COD ratio is an indicator of the proportion of biologically degradable organic matter to total organic matter.
Why COD and BOD ratio is important?
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.
What is the difference between COD and BOD?
The main difference between BOD and COD is that BOD is the amount of oxygen which is consumed by bacteria while decomposing organic matter under aerobic conditions whereas COD is the amount of oxygen required for the chemical oxidation of total organic matter in water.
Marilyn Medina is a food expert with over 15 years of experience in the culinary industry. She has worked in some of the most prestigious kitchens in the world, including The Ritz-Carlton and The French Laundry.
What makes Marilyn stand out from other chefs is her unique approach to cooking. She believes that food should be accessible to everyone, regardless of their budget or dietary restrictions. Her recipes are simple, delicious, and healthy – perfect for anyone who wants to cook like a pro!