Two-stage anaerobic/aerobic treatment process

Details Two-stage anaerobic/aerobic treatment process Two-stage anaerobic/aerobic treatment process

C - Chemistry, Metallurgy

02

F

362/4

C02F 3/30 (2006.01) C02F 3/10 (2006.01) C02F 3/12 (2006.01) C02F 3/28 (2006.01)

Patent

CA 2007024

ABSTRACT OF THE DISCLOSURE A two-stage process for purifying wasetwater includes the steps of biophysical anaerobic treatment to remove the majority of the COD, followed by biophysical aerobic treatment to further purify the wastewater. A powdered adsorbent, preferrably powdered activated carbon, is used with biological solids in each treatment step. Excess biophysical solids from the aerobic step are transferred to the anaerobic step for digestion. Fresh powdered adsorbent is added to the aerobic treatment step to compensate for that transferred to the anaerobic treatment step. Solids concentration in the anaerobic step is controlled by wasting solids to disposal.

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