Biological denitrification of waste water
专利汇可以提供Biological denitrification of waste water专利检索，专利查询，专利分析的服务。并且PURPOSE: To denitrify night soil sludge or the like,by circulating most of a nitrified liquid in the step of nitrification to the first step of denitrification at a front stage to denitrify NO
x in said circulated liquid, and introducing the remainder of said nitrified liquid together with returned sludge into the second step of denitrification.
CONSTITUTION: Night soil 1 is let flow together with a circulated nitrified liquid 2 into the first denitrification tank 3 under an anaerobic condition, NO
x in the nitrified liquid 2 is reductively decomposed into N
2 by denitrifying bacteria using BOD components in the night soil 1 as a reducig agent, and then NH
3 and residual BOD components in the night soil 1 are let flow into a nitrification tank 4 under an aerobic condition to nitrify NH
3 into NO
x and to oxidatively decompose residual BOD components. Most of the nitrified liqud is circulated to the first denitrification tank 3, while the remainder is let flow together with returned sludge 5 into the second denitrificatin tank 6 to reductively decompose NO
x into N
2 gas with mathanol 7 and a reaeration tank 8 to diffusively remove N
2 gas in water under a condition opened to the atmosphere and then separated into solid matter and a liquid in a precipitation tank 9.
COPYRIGHT: (C)1984,JPO&Japio，下面是Biological denitrification of waste water专利的具体信息内容。
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