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Method for treating organic nitrogen in sewage

A treatment method, organic nitrogen technology, applied in biological water/sewage treatment, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as limited promotion, bacteria breeding, and easy blockage of membrane pores. Achieve the effect of simple and intensive process, reduce eutrophication, and strong impact load resistance

Active Publication Date: 2013-10-30
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the popularization of this technology is greatly limited due to the problems such as easy clogging of membrane pores and the growth of bacteria.

Method used

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  • Method for treating organic nitrogen in sewage

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Embodiment Construction

[0026] The invention provides a sewage advanced treatment method for removing organic nitrogen in the secondary effluent of urban sewage treatment plants by combining biodegradation and physical filtration, that is, SBBR+coagulation-microfiltration process, to remove most of the organic nitrogen (including easy biodegradable and refractory), while further reducing the content of inorganic nitrogen such as ammonia nitrogen and nitrate nitrogen in the effluent.

[0027] The sewage referred to in the present invention is from the secondary effluent of urban sewage treatment plants, COD Cr Content below 100mg / L, NH 3 -N content is below 15mg / L.

[0028] The purpose of the present invention can be achieved through the following measures:

[0029] The secondary effluent of urban sewage treatment plants directly enters the SBBR reactor, and adopts the method of intermittent aeration to form an anaerobic, anoxic, and aerobic environment inside and outside the activated sludge flocs ...

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Abstract

The invention discloses a method for treating organic nitrogen in sewage. The method comprises the following steps of: treating sewage by using a sequencing batch biofilm reactor, decomposing macromolecular organic nitrogen into micromolecular organic nitrogen under the coexistence of anaerobic, anoxic and aerobic conditions, removing the micromolecular organic nitrogen by using the degradation of microbes, and simultaneously removing ammonia nitrogen and nitrate nitrogen through short-cut nitrification and denitrification and anaerobic ammonium oxidation; and treating by using a coagulation-microfiltration method, precipitating to remove bacteria, suspended solids (SS) and other nitrogen-containing substances by adding a coagulant, and removing refractory macromolecular organic nitrogen such as humic acid, fulvic acid and the like through filtration of a hollow fiber microfiltration membrane to reduce the total amount of the organic nitrogen in the sewage. The invention also discloses a device for implementing the treatment method.

Description

technical field [0001] The invention belongs to the field of advanced treatment of sewage, and in particular relates to an advanced treatment method for organic nitrogen in sewage, which can be used to remove organic nitrogen in the secondary effluent of urban sewage treatment plants. [0002] The invention also relates to a device for implementing the above method. Background technique [0003] Nitrogen in urban sewage exists in two forms: inorganic nitrogen and organic nitrogen. The former refers to ammonia nitrogen, nitrate nitrogen, and nitrite nitrogen, which mainly come from farmland drainage and surface runoff, fecal sewage, and industrial wastewater effluent where nitrogen fertilizers are applied. The latter refers to amino acids (including: free state and bound state), nucleic acid, protein, urea, humus, etc., mainly from domestic sewage, agricultural waste (plant straw, livestock manure, etc.) and some industrial wastewater (nitrogen fertilizer, printing and dyein...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F3/30C02F3/34C02F1/52C02F1/44C02F101/38
Inventor 霍守亮席北斗张靖天苏婧
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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