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Efficient biological nitrogen removal process for sewage treatment

A technology for biological denitrification and sewage treatment, which is applied in biological water/sewage treatment, water/sludge/sewage treatment, water pollutants, etc. It can solve the problem of difficult control, unstable operation performance and high energy consumption of biological denitrification process. and other problems, to achieve the effect of stable nitrification, optimization of biological community structure, and enhanced denitrification effect.

Active Publication Date: 2020-01-14
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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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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Embodiment Construction

[0062] The present invention will be described in detail below in the form of specific embodiments.

[0063] A high-efficiency biological denitrification process for sewage treatment mainly consists of a high-efficiency biological denitrification device main body (2), a sedimentation tank (7), a constant temperature system (1), a water inlet system (8), an aeration system (9), a chemical dosing system System (10) constitutes.

[0064] The constant temperature system (1) is composed of a constant temperature water bath layer (1-4), a constant temperature layer water inlet (1-1) (7 mm in diameter of the orifice) and a constant temperature layer water outlet (1-2) (7 mm in diameter of the orifice).

[0065] The said outer cylinder (2-11) consists of an upper cylinder (2-9) (290mm in height, 210mm in diameter) and a lower rounding platform (2-10) (210mm in diameter on the upper bottom surface, 50mm in diameter on the lower bottom surface, and 60mm in height); The upper cylinder (...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/30C02F101/16
CPCC02F3/34C02F3/301C02F2101/16C02F2203/006
Inventor 陈宏刘珂陈婧雷超熊鹰谢敏吴莎龚丽玲赵文玉杜春艳
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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