Water treatment COD
Thread Content
Generally, COD is monitored online at low concentrations. Is there any equipment for online COD monitoring at high concentrations that does not require dilution? The device should cost less than 10W; I hope experts can provide some advice
Is it still meaningful to measure COD values above 5,000?
Is it still meaningful to measure COD values above 5,000? Hello, I’m not very familiar with this. Why is it meaningless when the value exceeds 5000? Here we usually use a value of 10,000; it needs to be manually diluted to 3000 for manual testing. Since human error is likely to occur, we prefer to use equipment for such tests
If you can already see that there’s poop inside, what’s the point of testing for it anymore?
In organic chemical manufacturing processes, there are certain special processes in which process materials exist in the discharged water either in dissolved or suspended form, resulting in very high COD values. Typically, COD testing is not carried out for the purpose of monitoring environmental emissions, but rather to assess the recovery of these materials from the discharged water and to determine their impact on the load of downstream water treatment units. For water with high concentrations of organic pollutants, it is recommended to use the TOC method for testing. During COD testing, when the COD value is too high, the oxidants and acids are consumed, resulting in poor oxidation capacity and inaccurate measurement values; moreover, this can also make it difficult to clean the containers used in the digestion process.