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Denitrification

阅读:585发布:2021-12-12

专利汇可以提供Denitrification专利检索,专利查询,专利分析的服务。并且PURPOSE: To perform through denitrification when a nitric acid state N and a nitrous acid state N in a solution are reduced into nitrogen gas by denitrifying bacteria in the presence of a hydrogen donor, by controlling the pH level of the hydrogen donor to be supplied to a denitrifying vessel and a measuring vessel and supplying a sufficient amount of hydrogen donor to the measuring vessel.
CONSTITUTION: The aqueous solution containing the nitric acid state N and/or the nitrous acid state N, and an active sludge concentrated liquid 3 are introduced into a mixing vessel and uniformly mixed with each other. Most of the mixed liquid is introduced into the denitrifying vessel 1 and a part of the mixed liquid is introduced into the measuring vessel 5 through a pump 16 at such a flow rate that the residence uime of the mixed liquid in the vessel 5 is equalized to that in the vessel 1. Then, the hydrogen donor is supplied into the vessels 5, 1. At that time, for the vessel 5, an amount of the hydrogen donor large enough to thoroughly reduce the nitric (nitrous) acid state N into N
2 is supplied. For the vessel 1, the amount of the hydrogen donor is so controlled that a formula, (pH level in the vessel 5)-0.4≤ (pH level in the vessel 1),下面是Denitrification专利的具体信息内容。

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