CPC B01D 53/85 (2013.01) [C02F 1/004 (2013.01); C02F 3/04 (2013.01); C02F 3/327 (2013.01); C02F 2201/005 (2013.01); C02F 2301/046 (2013.01); C02F 2303/02 (2013.01)] | 15 Claims |
1. A method for treating contaminated air to remove selected compounds using microorganisms in a media bed without use of potable water, comprising:
receiving a contaminated water stream;
treating the contaminated water stream to form a non-potable irrigation water stream containing contaminants at levels below levels harmful to the microorganisms, wherein the non-potable irrigation water stream has contaminant levels of about 5 to 60 ppm TSS, about 10 to 60 ppm total nitrogen with about 2 to 30 ppm in the form of NH3 (ammonia), about 5 to 50 mg/L CBOD5 and about 10 to 100 mg/L COD;
irrigating the media bed and microorganisms with the non-potable irrigation water stream; and
producing a treated air stream by directing a contaminated air stream through the irrigated media bed and microorganisms to remove at least one selected compound from the contaminated air stream;
wherein said treating the contaminated water stream comprises:
passing the contaminated water stream through a water treatment media bed supporting water treatment microorganisms selected to reduce contaminant compounds in the contaminated water stream;
recirculating a portion of the non-potable irrigation water stream back through the water treatment media bed; and
controlling flow of the contaminated water stream and the recirculated portion of non-potable irrigation water stream through the media bed to control the level of contaminant removal;
and wherein said controlling comprises controlling said flows to maintain said contaminant levels in the non-potable irrigation water stream to be at a level beneficial to the microorganisms used in producing the treated air stream.
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