What is the COD removal rate for treating domestic wastewater using biological contact oxidation?

2011-02-21View Original

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What is the COD removal rate for treating domestic wastewater using biological contact oxidation?

Reply #22011-02-21

Under the comprehensive standards for wastewater discharge, the first-stage discharge criteria for urban secondary wastewater treatment plants are BOD 20 and COD 60. Both the activated sludge method and the contact oxidation method yield excellent treatment results. For typical domestic wastewater, with BOD of 200 and COD of 400, the removal rates are 90% and 85% respectively. This is for reference only.

Reply #32011-02-21

This post was last edited by fangqiong on 2011-2-22 at 17:13. Currently, the general requirement for water discharge standards is that COD should be below 150; in the three major river systems, it should be below 100. What the person on the second floor said is that the discharged water does not meet the standards!

Reply #42011-02-28

This post was last edited by fangqiong on 2011-2-28 at 11:50. The COD removal rate in the aerobic treatment of domestic wastewater is generally above 80%.

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