专利汇可以提供Method and equipment for removing nitrogen from sewage专利检索,专利查询,专利分析的服务。并且PURPOSE: To make installation area comparatively small and also to obtain a preferable biological denitrifying process at small volume without lowering denitrification efficiency by mixing sewage with both the returned activated sludge and circulated nitrification liquid to perform denitrification and thereafter performing oxidation of BOD and then performing solid-liquid separation and aerobically nitrifying the separated water with the solid particle group.
CONSTITUTION: Raw water is agitated and mixed with both the activated sludge returned from a final sedimentation basin 14 and nitrification liquid circulated from a nitrification vessel 12 in a denitrification vessel 2 and denitrification is performed. The discharged water is introduced into a BOD oxidation vessel 11 and aeration is performed in the existence of activated sludge and BOD remaining in water is chiefly oxidized. The solid particle group with nitrification bacteria stuck thereon is housed in a nitrification vessel 12 and this solid particle group is brought into contact with the separated water of the final sedimentation basin 14 under the aerobic conditions to perform nitrification treatment. Since large amounts of nitrification bacteria are held on the solid particle group having the large surface area, nitrification treatment is extremely efficiently performed even in a miniature vessel.
COPYRIGHT: (C)1990,JPO&Japio,下面是Method and equipment for removing nitrogen from sewage专利的具体信息内容。
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