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Large-scale treatment system for municipal domestic sewage

A domestic sewage and treatment system technology, applied in the direction of light water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems that restrict the development level of cities and towns, and achieve sufficient dehydration and decontamination treatment , the residence time is less, the effect of not easy to expand

Inactive Publication Date: 2018-09-07
HENAN UNIV OF SCI & TECH
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Problems solved by technology

[0004] The engineering design problems of urban sewage will affect the natural environment and quality of life of cities and towns, and seriously restrict the development level of cities and towns. Therefore, it is imminent to design a large-scale urban domestic sewage treatment system with standard passing, suitable technology and efficient treatment.

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  • Large-scale treatment system for municipal domestic sewage
  • Large-scale treatment system for municipal domestic sewage
  • Large-scale treatment system for municipal domestic sewage

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Embodiment Construction

[0025] Below in conjunction with specific embodiment, content of the present invention is described in further detail:

[0026] Such as figure 1 As shown, this embodiment is a large-scale urban domestic sewage treatment system, including a throttle overflow well 1, a coarse grid room 2, a lifting pump room 3, a fine grid room 4, a primary sedimentation distribution well 5, a primary Settling tank 6, oxidation ditch 7, secondary settling water distribution well 8, secondary settling tank 9 and disinfection outlet room 10; The concentration pool 11 is provided with an excess sludge pump set 13 and a return sludge pump set 14 , and the return sludge pump set 14 is connected to the oxidation ditch 7 .

[0027] Such as figure 2 As shown, the oxidation ditch 7 is elliptical and includes an outer ditch 15, a middle ditch 16, an inner ditch 17 and an anaerobic tank 18 arranged from the outside to the inside, and the outer ditch 15, the middle ditch 16, the inner ditch 17 and the an...

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Abstract

The invention discloses a large-scale treatment system for municipal domestic sewage. The large-scale treatment system comprises a throttling overflow well, a coarse rack room, a lift pump station, afine rack room, a primary sedimentation distributing well, a primary sedimentation tank, oxidation ditches, a secondary sedimentation distributing well, secondary sedimentation tanks and a disinfection water outlet room which are sequentially connected. BOD5, SS as well as nitrogen and phosphorus existing in various forms in the domestic sewage are removed separately by adopting an A2O process; sludge has good settleability and is not easy to bulge; the complete set of equipment system stably operates, and large-scale integrated purification treatment on municipal sewage and sludge is realized; treated effluent reaches Standard B of a primary standard in the Discharge Standard for Pollutants in Municipal Sewage Treatment Plant. The large-scale treatment system disclosed by the invention issuitable for a treatment technology of the municipal domestic sewage.

Description

technical field [0001] The invention relates to the technical field of urban domestic sewage treatment, in particular to a large-scale urban domestic sewage treatment system. Background technique [0002] my country has a vast territory, natural conditions and economic development levels vary greatly, and urban regional characteristics, industrial structures and main functions are also different. Therefore, the characteristics, collection methods, discharge water body conditions, design land use, and selection processes of urban sewage are all different. . At present, there are no on-site drainage design specifications, standards, regulations, etc. for small town sewage treatment projects (the treatment scale is less than 20,000 tons / day, mostly concentrated at 2,000-5,000 tons / day), and the current medium and large-scale sewage is still used. Dealing with the relevant standards of the project, many problems were found in the engineering design. [0003] Urban sewage mainly...

Claims

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Application Information

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IPC IPC(8): C02F9/14
CPCC02F1/004C02F1/32C02F3/30C02F9/00C02F2001/007C02F2301/08
Inventor 齐茜张纪亮朱文文孙平任洪涛张春暖
Owner HENAN UNIV OF SCI & TECH
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