Hello.
I want to complete my information on water and wastewater and methods of effluent analysis.
What is effluent COD measurement methods?
Chemical Oxygen demand is indirect measure of total organics present in water. There are two types of organic in water, bio-degradable and non-biodegradable. Bio-degradables are measured as Biological Oxygen Demand (BOD).
Non bio-degradable = COD - BOD
For COD strong oxidizing agent is used such a potassium dichromate (PDC) solution of known strength. A know volume of oxidising agent is added and digested in acidic medium (H2SO4). The unused dichomate is measured with the help of Farious ammonium sulfate (FAS) of known strength.
COD (mg/l)=
ml of PDC*N of PDC*8000/ml of sample
Chemical Oxygen demand is indirect measure of total organics present in water. There are two types of organic in water, bio-degradable and non-biodegradable. Bio-degradables are measured as Biological Oxygen Demand (BOD).
Non bio-degradable = COD - BOD
For COD strong oxidizing agent is used such a potassium dichromate (PDC) solution of known strength. A know volume of oxidising agent is added and digested in acidic medium (H2SO4). The unused dichomate is measured with the help of Farious ammonium sulfate (FAS) of known strength.
COD (mg/l)=
ml of PDC*N of PDC*8000/ml of sample
We prepared this video for our students regarding COD
https://www.youtube.com/watch?time_continue=4&v=cGVlKH78uAs&feature=emb_logo
The chemical oxygen demand is a measure of organic matter content that is susceptible to oxidation by a strong chemical oxidant
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