Efficient biological nitrogen removal process for sewage treatment

Abstract

The invention discloses an efficient biological nitrogen removal process for sewage treatment. The process consists of an efficient biological nitrogen removal device main body for sewage treatment, asedimentation tank, a constant temperature system, a water inlet system, an aeration system and a dosing system, wherein the efficient biological nitrogen removal device main body is composed of a constant temperature water bath layer, an outer cylinder, a cylindrical flow guide, an inner cavity, a triangular flow guide, a fluidized filler and a fixed fiber filler. In operation of the process, the ammonia nitrogen concentration of fed water is 40-80mg/L, and the water retention time is 2-12 hours; and in operation of the process, an air pump is adopted for continuous aeration, the aeration rate is 0-6m<3> air/m<3>/h, the dissolved oxygen concentration inside the device main body is 0-2mg/L, the temperature is 25-40 DEG C, and the pH value is 7-8.5. According to the process, zeolite and activated carbon fiber are adopted to adsorb ammonia nitrogen, ecological structures of florae are optimized, and enrichment of functional florae is promoted; and bottom aeration is implemented to realize internal circulation and dosing is implemented when operating performance is reduced, and the process has the advantages of long-term stable operation, simple and compact structures, convenience inoperation, good ammonia removal effects, energy conservation and high efficiency, environmental friendliness, and the like.

Description

technical field [0001] The invention relates to a high-efficiency biological denitrification process for sewage treatment, which belongs to the technical field of sewage treatment. [0002] technical background [0003] Not only is our country seriously short of water resources, but water pollution is also becoming increasingly serious. Ammonia nitrogen is one of the main target removal substances in water treatment, and anaerobic ammonium oxidation is the most economical biological nitrogen removal technology known so far. [0004] Anaerobic ammonium oxidation refers to the anaerobic ammonium oxidation bacteria under anaerobic or anoxic conditions, with NO 2 - Oxidation of NH for electron acceptor 4 + , yielding N 2 and a small amount of NO 3 - biological process. Compared with the traditional process, the anaerobic ammonium oxidation treatment technology shortens the denitrification pathway, has the advantages of saving energy, reducing excess sludge production, sav...

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Problems solved by technology

[0008] The problem to be solved by the present invention is: the traditional biological denitrification process with nitrification-denitrification as the core has high energy consumption, long process and low efficiency, and the biological denitrification process based on anaerobic ammonium oxidation technology is difficult to control and unstable in operation performance The present invention provides a high-efficiency biological denitrification process for sewage treatment with simple and compact structure, optimized flow field, convenient operation, easy control, low energy consumption and stable long-term operation performance

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