Removal of COD from Waste Water
Removal of COD from Waste Water
(OP)
In a Industrial Waste Water,
COD is 480 mg/l &
BOD is 360 mg/l
My understanding is 360 mg/l out of 480 mg/l of COD is Biodegradable & can be biologically oxidized & the remaining 120 mg/l of COD is non biodegradable & need to be oxidized chemically or by Activated Carbon.
Please advise if my understanding is right or not.
COD is 480 mg/l &
BOD is 360 mg/l
My understanding is 360 mg/l out of 480 mg/l of COD is Biodegradable & can be biologically oxidized & the remaining 120 mg/l of COD is non biodegradable & need to be oxidized chemically or by Activated Carbon.
Please advise if my understanding is right or not.





RE: Removal of COD from Waste Water
The ratio of BOD/COD: COD is typically higher than that of BOD; a minimum of 2:1 for municipal wastewater, but varies depending on the industrial process and nature of the raw materials used.
RE: Removal of COD from Waste Water
RE: Removal of COD from Waste Water
The disadvantage of the COD test is that not all of the measured COD can be degraded biologically. There may also be some interferences with the COD test. Low molecular weight fatty acids and aromatic hydrocarbons (organics) may not be well oxidized during a COD test and some inorganic ions (chloride and nitrite) may be oxidized. The addition of catalysts during the COD test may help to eliminate the interferences.
RE: Removal of COD from Waste Water
Different wastewaters will have different relationships between BOD5, TBOD and COD.
TBOD will be closer to COD than BOD5. BOD5 should be less than TBOD. In domestic wastewater BOD5 is likely to be 0.75 or more of the TBOD
but it varies. In industrial wastewater there is sometimes a very large difference between BOD5 and TBOD.
Regards
Ashtree
"Any water can be made potable if you filter it through enough money"