Municipal sewage treatment system and method

A municipal sewage and treatment system technology, applied in water/sewage treatment, oxidized water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the waste of resources and energy, aggravate greenhouse gas emissions, increase excess sludge, etc. problems, to achieve the effect of recycling energy protection, achieving reduction, and leading process performance

Active Publication Date: 2019-02-12
GUOZHONG AIHUA TIANJIN MUNICIPAL ENCIRONMENT ENG
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  • Application Information

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Problems solved by technology

In addition, non-biodegradable organic substances such as cellulose that cannot be removed in the pretreatment process of traditional processes directly lead to the increase of excess sludge, which often has to be reduced and stabilized by means of final incineration
[0003] The traditional sewage treat

Method used

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  • Municipal sewage treatment system and method

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Embodiment

[0110] Adopt the municipal sewage treatment system of the embodiment of the present invention, take a certain municipal sewage treatment plant project and adopt the municipal sewage treatment system of the present invention as an example, the method for municipal sewage treatment is as follows:

[0111] It consists of an enhanced pretreatment unit, an enhanced biological treatment unit, an advanced treatment unit and an energy recovery unit connected in sequence. Influent COD, BOD 5 , NH 3 -N, TN, TP, SS concentrations are 400mg / L, 250mg / L, 40mg / L, 55mg / L, 6mg / L, 200mg / L respectively, after the above-mentioned new treatment, when the treatment scale is 200t / d, Effluent COD, BOD 5 , NH 3 -The concentrations of N, TN, TP, and SS can reach 20mg / L, 10mg / L, 0.8mg / L, 8mg / L, 0.2mg / L, and 5mg / L respectively, which can reach the Beijing local standard "Comprehensive Discharge of Water Pollutants" Standard "(DB11 / 307-2013) A standard.

[0112] Compared with the existing technology,...

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Abstract

The invention discloses a municipal sewage treatment system and method. The municipal sewage treatment system comprises a strengthened pre-treatment unit, a strengthened biological treatment unit, a deep treatment unit and an energy recycling unit, wherein the strengthened pre-treatment unit is internally provided with a cellulose recycling device; the cellulose recycling device is provided with acellulose recycling opening; a municipal sewage inlet is formed in the front end of the strengthened pre-treatment unit and an outlet is formed in the rear end of the strengthened pre-treatment unit;the outlet at the rear end of the strengthened pre-treatment unit is connected with the strengthened biological treatment unit and the deep treatment unit in sequence; the deep treatment unit is provided with an up-to-standard water outlet; the strengthened biological treatment unit is internally provided with a lateral flow phosphorus recycling device; the lateral flow phosphorus recycling device is provided with a phosphorus recycling opening; the strengthened biological treatment unit is provided with a residual sludge outlet; the energy recycling unit is connected with the up-to-standardwater outlet of the deep treatment unit; the energy recycling unit is provided with a resource recycling opening and an energy recycling opening respectively. The system can meet high emission standards and also can be used for recycling resources and energy sources including phosphorus, chemical energy, heat energy, cellulose and the like in sewage.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a system and method for treating municipal sewage. Background technique [0002] In recent years, black and odorous water bodies have been raging, and my country has paid more and more attention to water pollution issues. The country has continuously improved the discharge standards of water pollutants from urban sewage treatment plants: my country's water pollution reduction targets will be based on the original COD total control. To strengthen the control of ammonia nitrogen and total phosphorus, it is clearly stated that sewage treatment plants should gradually meet the first-level A standard of GB18918-2002 "Pollutant Discharge Standards for Urban Sewage Treatment Plants"; while in environmentally sensitive areas, more stringent local standards have been issued one after another. For example, the "Comprehensive Discharge Standard of Water Pollutants" (DB11 / 890-2012) issued by Be...

Claims

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Application Information

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IPC IPC(8): C02F9/14
CPCC02F1/001C02F1/38C02F1/5236C02F1/56C02F1/78C02F3/30C02F9/00C02F2301/08C02F2303/10
Inventor 刘杰林甲江瀚吴远远
Owner GUOZHONG AIHUA TIANJIN MUNICIPAL ENCIRONMENT ENG
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