Sewage treatment method and system

A sewage treatment method and sewage pretreatment technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of denitrification carbon source deficiency, denitrification and phosphorus removal, etc. , to achieve the effect of improving the efficiency of wastewater treatment

Inactive Publication Date: 2014-05-28
SOUNDGRP CO LTD
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a sewage treatment method and system, which can realize the removal of phosphorus while improving the denitrification effect, and improve the efficien

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Embodiment Construction

[0018] The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0019] The embodiment of the present invention provides a sewage treatment method, which can take into account biological denitrification and biological phosphorus removal at the same time, and can be used for large-scale municipal sewage treatment, small town sewage treatment, and existing sewage treatment with limited land occupation and high requirements for effluent quality. The upgrade of the plant and the treatment of some high-concentration industrial wastewater are treated by a system consisting of a pretreatment unit, a seco...

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Abstract

The invention discloses a sewage treatment method and a sewage treatment system, and belongs to the field of sewage treatment. With adoption of the method, a sewage pre-treatment unit, a secondary biological treatment unit and an advanced treatment unit which are sequentially connected are adopted, the method comprises the following steps: pretreatment: allowing the to-be-treated sewage to enter the sewage pre-treatment unit, and filtering, floating in air or precipitating to remove suspended matters in the sewage; secondary biological treatment: allowing the pre-treated sewage to enter the secondary biological treatment unit, using A2/O-MBR in a front oxygen deficit tank in the secondary biological treatment unit to remove COD (Chemical Oxygen Demand), ammonia nitrogen, and total nitrogen and phosphorus; and advanced treatment: allowing the effluent secondarily biologically treated to enter the advanced treatment unit, and directly discharging or recycling the effluent after disinfection. The pretreatment, the secondary biological treatment and the advanced treatment are matched, particularly, A2/O-MBR in the front oxygen deficit tank in the secondary biological treatment effectively removes COD, ammonia nitrogen, and total nitrogen and phosphorus in the sewage, so that the phosphorus is removed while the denitrification effect is guaranteed, and the waste water treatment efficiency is improved.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a sewage treatment method and system. Background technique [0002] In recent years, the environmental problems caused by eutrophication of water bodies have become increasingly prominent, and the shortage of water resources and water environment pollution have become one of the important factors affecting the sustainable development of my country's economic society. During the "Twelfth Five-Year Plan" period, my country's water pollution reduction target will strengthen the control of ammonia nitrogen and total phosphorus on the basis of the original total COD control. Material Emission Standard "Class A Standard". [0003] Traditional A / O, A 2 / O, oxidation ditch and other sewage treatment processes have their own shortcomings, mainly due to the influence of these processes on the adjustment of factors such as sludge age, sludge concentration, carbon source, nitrate, etc., whic...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 刘杰王亚东娄高彬李传举马宁王俊安姜安平
Owner SOUNDGRP CO LTD
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