Urban comprehensive sewage treatment process

A sewage treatment and process technology, applied in the field of urban comprehensive sewage treatment process, can solve the problems of large surplus sludge output, high operating costs, high energy consumption, etc., and achieve the effect of saving sludge treatment costs and improving effluent water quality standards

Active Publication Date: 2017-05-10
江苏绿尚环保科技有限公司
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Problems solved by technology

[0003] Urban sewage plants usually adopt some traditional sewage treatment processes, such as AAO, oxidation ditch, etc. The tradi

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Embodiment Construction

[0060] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0061] Jiangyin Yuantong Comprehensive Sewage Treatment Co., Ltd., the water treatment volume is 10,000 tons / day, and the influent concentration before treatment is COD≤440mg / L, BOD 5 ≤260mg / L, PH≤4, ammonia nitrogen≤35mg / L, TP≤5.5mg / L, SS≤300mg / L.

[0062] The effluent of the original process is required to meet the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" GB18918-2002 Class I B standard. Now the standard has been upgraded, and the treated effluent can meet the "Urban Sewage Treatment Plant Pollutant Discharge Standards" GB18918-2002 Class A A standard .

[0063] The original treatment process mainly adopts the AAO method combined with the enhanced physical and chemical method. Now it is modified according to this process. The process flow is as follows

[0064] Steps:

[0065] (1) The comprehensive urban sewage pa...

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Abstract

The invention relates to an urban comprehensive sewage treatment process which comprises the following steps: the urban comprehensive sewage passes through coarse and fine grates to remove large granular solid impurities, and enters a silt settling tank to further remove silt and small granular solids; supernatant of the silt settling tank enters an 'AAO' process stage, that is, an 'anaerobic-anoxic-aerobic' reaction tank; various pollutants are removed by microbial degradation; the effect of nitrogen and phosphorus removal is realized; an anaerobic tank is subjected to sludge discharge treatment periodically; a part of mixture flowing out of an aerobic reaction tank flows back to an anoxic reaction tank; an appropriate amount of LS nano-bio-circulating water treatment agent is pumped into a water outlet pipe of the aerobic reaction tank; the wastewater enters a sedimentation tank; the sedimentation tank is provided with sludge backflow for respectively flowing back to the aerobic reaction tank and the anaerobic reaction tank; the supernatant can be discharged on standard through filtration and disinfection. The urban comprehensive sewage treatment process achieves the reduction of sludge, further purifies the water quality, and greatly increases drainage.

Description

technical field [0001] The invention belongs to a sewage treatment process, in particular to an urban comprehensive sewage treatment process using a biological treatment agent. Background technique [0002] Urban comprehensive sewage plants mainly receive urban industrial wastewater and domestic sewage. In recent years, with the development of economic life, the urban population has increased, the city has expanded, and the discharge of industrial wastewater and domestic sewage has increased. pressures and challenges. At the same time, the country continues to introduce environmental protection policies for sewage treatment, and the standards and requirements for sewage treatment continue to increase. The original treatment process of sewage plants needs to be upgraded to adapt to the current status of sewage and sewage treatment requirements. [0003] Urban sewage plants usually adopt some traditional sewage treatment processes, such as AAO, oxidation ditch, etc. The tradi...

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Application Information

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IPC IPC(8): C02F9/14
CPCC02F1/001C02F3/30C02F3/34C02F9/00C02F2001/007C02F2303/04
Inventor 薛小虎刘成柱黄超
Owner 江苏绿尚环保科技有限公司
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