Tail water advanced treatment device and treatment method

A sewage treatment device and advanced treatment technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of large mud production, large floor area, and inconvenient maintenance and management And other issues

Pending Publication Date: 2020-06-02
桂润环境科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Insufficient carbon sources in the influent lead to poor denitrification and phosphorus removal effects in township sewage treatment facilities. It is often necessary to continuously add carbon sources and PAC and other chemicals to improve the denitrification and phosphorus removal effects, and the cost is high; and PAC and other phosphorus removal agents Using it will cause problems such as large mud production
[0003] Aiming at the problems of low C / N and low nitrogen and phosphorus removal efficiency of township sewage treatment facilities, Chinese patents CN209259896U and CN108101222A advocate the use of constructed wetlands for advanced treatment of tail water after treatment of township sewage, but the advanced treatment methods of constructed wetlands account for Large area, easy to block, inconvenient maintenance and management

Method used

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  • Tail water advanced treatment device and treatment method
  • Tail water advanced treatment device and treatment method
  • Tail water advanced treatment device and treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] use as figure 1 The tail water advanced treatment device shown is for township sewage treatment; among them, the design flow rate is 1000m 3 / d, the average daily treated water volume is 800m 3 / d;

[0096] The sewage treatment device 2 is a DMBR double-membrane integrated equipment based on the MBR process, such as figure 2 As shown, it includes a grille 2-1, a denitrification adjustment tank 2-2, a biochemical reaction tank 2-3 and a filter tank 2-4 connected in sequence; the denitrification adjustment tank 2-2 is provided with a first sludge outlet , the biochemical reaction tank 2-3 is provided with a second sludge outlet, the filter tank 2-4 is provided with a third sludge outlet, the first sludge outlet, the second sludge outlet and the third sludge outlet The outlet is independently connected to the feed port of the sludge thickening tank 2-5; the sewage outlet of the sludge thickening tank 2-5 is connected to the feed port of the excess sludge liquefaction d...

Embodiment 2

[0109] use as figure 1 The tail water advanced treatment device shown is used for township sewage treatment; among them, the design flow rate is 800m 3 / d, the average daily treated water volume is 500m 3 / d;

[0110] The sewage treatment device 2 is a DMBR double-membrane integrated equipment based on the MBR process, such as figure 2 shown. Due to the discharge of slaughter wastewater into the pipe network, the concentration of ammonia nitrogen and total phosphorus pollutants in the water is relatively high. figure 1 The water quality of influent water is shown in Table 3;

[0111] The water quality of table 3 embodiment 2 inlet water

[0112]

[0113] Tail water advanced treatment method is as follows:

[0114] (1) Sludge liquefaction and recovery of carbon sources: the excess sludge of the sludge concentration unit of the sewage treatment plant 2 enters the excess sludge liquefaction plant 1 for hydrolysis and acidification to obtain a hydrolyzate; the hydrolysis...

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Abstract

The invention relates to the technical field of sewage treatment, in particular to a tail water advanced treatment device and treatment method. The tail water advanced treatment device provided by theinvention comprises a sewage treatment apparatus, an ammonia recovery apparatus, a phosphorus recovery apparatus, a denitration apparatus, a backwash filtering apparatus and a disinfection apparatuswhich are communicated sequentially, and the treatment device further comprises a residual sludge liquefaction apparatus, a sewage outlet of the sewage treatment apparatus is communicated with a feedinlet of the residual sludge liquefaction apparatus, and a liquid outlet of the residual sludge liquefaction apparatus is communicated with a water inlet of the sewage treatment apparatus. Residual sludge discharged by the sewage treatment apparatus is subjected to hydrolytic acidification through the residual sludge liquefaction apparatus so as to be recycled as a carbon source, and the defect ofinsufficient carbon source of village and town sewage is overcome. By adopting the tail water advanced treatment device provided by the invention, efficient denitration, denitrification and phosphorus removal can be carried out on tail water automatically, nitrogen and phosphorus resources are recycled, and to-be-discharged water meeting the standard of surface quasi-class IV water is obtained.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a tail water advanced treatment device and a treatment method. Background technique [0002] At present, the decentralized township sewage treatment process mainly uses oxidation ditch, SBR, A / O, A 2 / O or "A / O, A 2 / O+MBR” process is the main method, and there is a common problem of low C / N in the influent. Insufficient carbon sources in the influent lead to poor nitrogen and phosphorus removal effects in township sewage treatment facilities, and continuous dosing of carbon sources and PAC and other chemicals is often required , to improve the effect of nitrogen and phosphorus removal, the cost is high; and the use of phosphorus removal agents such as PAC will cause problems such as large sludge production. [0003] Aiming at the problems of low C / N and low nitrogen and phosphorus removal efficiency of township sewage treatment facilities, Chinese patents CN209259896U...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/30
CPCC02F1/001C02F1/42C02F3/30C02F9/00C02F2001/007C02F2101/30C02F2303/04C02F2303/14
Inventor 张小平梁剑成余意杨兴欧奕霏奚益翔黄春湘黄春倩
Owner 桂润环境科技股份有限公司
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