Biological nitrogen removal method based on anaerobic Feammox and application thereof

Abstract

The invention discloses a biological nitrogen removal method based on anaerobic Feammox and application thereof. The biological nitrogen removal method comprises the following steps that sludge containing Feammox microorganisms is added into an anaerobic reactor, ammonia containing wastewater is led into the reactor, NH4 + in the Fe (III) NTA oxidized wastewater is utilized to generate NO2-, and then nitrogen treatment is performed. The biological nitrogen removal method comprises the specific steps that 1, the Feammox enriched microorganisms are cultivated: the sludge is pretreated and the Feammox microorganisms are cultivated; 2, the Feammox microorganisms are utilized to perform wastewater treatment; 3, nitrogen removal treatment is performed by using the liquid collected after anaerobic Feammox treatment. The method has the advantages of lower power consumption, few carbon source demands, less greenhouse gas emissions, less produced NO3- and the like, is lower in investment and operating costs and wide in application prospect.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method for treating ammonia in sewage by using anaerobic iron to oxidize ammonia and its application in sewage denitrification. Background technique [0002] At present, NH can be realized in sewage treatment 4 + The microbial processes of oxidation are mainly aerobic ammonium oxidation and anaerobic ammonium oxidation. Although the traditional aerobic ammonium oxidation process has been widely used in sewage treatment, this process requires oxygen from the outside to be able to test NH 4 + Oxidation of Oxygen and product NO in the aerobic ammonium oxidation system 2 - , so there are usually nitrite oxidizing bacteria in the system to convert NO 2 - Oxidation to NO 3 - , and then through the denitrification process to be able to NO 3 - Revert to N 2 Achieve NH 4 + removal, so the traditional nitrification and denitrification process needs to a...

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Problems solved by technology

[0006] Jaffé of Princeton University in the United States found Feammox bacteria in the soil of riverbank grasslands, which can realize Feammox. They took soil samples from the site and used anaerobic reactors in the laboratory to pass ferrihydrite or goethite through 180 days. However, due to the low solubility and poor bioavailability of iron in ferrihydrite or goethite, the enrichment effect is not very ideal.

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