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Enhanced phosphorus removal and sludge reduction type sewage treatment process

A technology for sludge reduction and sewage treatment, applied in water/sludge/sewage treatment, water/sewage treatment, biological water/sewage treatment, etc. The problem of low efficiency

Active Publication Date: 2017-06-09
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the problems of long sewage treatment process, large sludge output, low nitrogen and phosphorus removal efficiency, weak anti-impact ability to deal with abnormal water inflow and high treatment cost in the existing sewage treatment technology, and designs an enhanced phosphorus removal and sewage treatment technology. Sludge reduction type sewage treatment process. The process of the present invention integrates biological flocculation sedimentation, mainstream biological phosphorus removal coupled with side flow chemical phosphorus removal, synchronous nitrification and denitrification denitrification, and in-situ sludge reduction, and can cope with short-term high-concentration organic waste. At the same time, it has the advantages of small sludge output, good nitrogen and phosphorus removal effects, strong impact resistance, and simple treatment process. It is an urban sewage treatment process that can effectively deal with abnormal water inflow.

Method used

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  • Enhanced phosphorus removal and sludge reduction type sewage treatment process
  • Enhanced phosphorus removal and sludge reduction type sewage treatment process

Examples

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Embodiment 1

[0049] An enhanced phosphorus removal and sludge reduction wastewater treatment process (treatment devices such as figure 1 (Shown), the treatment of ordinary domestic sewage, the use of multiple steps to enhance anaerobic phosphorus release: the movable partition in the return point of the nitrification liquid prevents the diffusion of the return nitrification liquid to an anaerobic tank, reducing the effect of inhibiting phosphorus release; pre-sludge reduction The module anoxic / anaerobic environment consumes nitrate and reduces the effect of inhibiting phosphorus release; high-concentration mixed liquid and long mud age increase the concentration of easy biochemical carbon sources such as fatty fatty acids, and strengthen the subsequent anaerobic pool phosphorus release; increase the anaerobic pool At the side flow point of the clear liquid, the supernatant flows into the side-stream chemical phosphorus removal sedimentation tank in proportion, and the biological and chemical ...

Embodiment 2

[0066] An enhanced phosphorus removal and sludge reduction sewage treatment process, which treats sewage with high organic load, includes the following steps:

[0067] Overall treatment: When the influent is sewage with high organic load, if the water quality changes suddenly after a rainy day, adjust the hydraulic retention time of the pre-sludge reduction unit to 5h. The extended residence time makes the reduction unit not only play the role of sludge reduction, but also effectively reduce the high organic load. The secondary effect can weaken the impact of sewage on the rear reactor and affect the treatment effect. The rest of the operation is the same as in Example 1.

[0068] The sewage treated in Example 2 was the water taken from the middle water station of Shandong Jianzhu University after heavy rain. The water quality (mg / L) of the treated water: COD: about 600 mg / L, SS increased sharply by about 1000 mg / L, and suspended solids increased. After the pre-sludge reduction un...

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Abstract

The invention relates to an enhanced phosphorus removal and sludge reduction type sewage treatment process. The process includes that sewage enters a preposed sludge reduction unit, repeatedly backflows into a main reactor for treatment in reverse flow state and oblique diagonal mode and sequentially flows through an anaerobic area, an anoxic area and an aerobic area for biochemical reaction treatment, outgoing water enters a second setting tank for standing, sludge on the lower portion of the second setting tank backflows to the preposed sludge reduction unit through a sludge outer backflow pipe, and the sludge after being treated is discharged from a water outgoing pipe on the upper portion of the second setting tank; at the same time, clear liquid on the anaerobic area enters a side flow chemical crystallizing column for chemical crystallizing removal of phosphorus, and the clear liquid after phosphorus removal backflows to the anoxic area. A device adopted in the sewage treatment process is convenient to mount, simple and quick to operate, reliable and stable in performance, good in treatment effect and low in running cost. The flow state of the process is a mixed flow state, a bio-carrier is suspended filler and is needless to support and fix and convenient to use, and good sewage denitrification, phosphorus removal, phosphorus recycling and sludge reduction effects can be realized.

Description

Technical field [0001] The invention belongs to the technical field of sewage treatment, and relates to a sewage treatment process of enhanced phosphorus removal and sludge reduction. Background technique [0002] The discharge of sewage with high nitrogen and phosphorus will consume a large amount of oxygen in the water body, resulting in eutrophication and even toxicity. Therefore, the removal of biological and organic substances in sewage, especially the use of biological methods, is essential for the protection of the water environment. At present, the mainstream sewage phosphorus removal technology is mainly the single use and combination of physical, chemical and biological methods. The physical phosphorus removal method has been proved to be a relatively expensive treatment method, such as electrolysis and reverse osmosis technology, but these technologies are inefficient and the removal rate is only 10%. Chemical phosphorus removal technology will cause relatively high ...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/30C02F101/10
CPCC02F1/52C02F1/58C02F3/301C02F3/308C02F2101/105
Inventor 王永磊刘宝震王洪波张克峰尹萌萌王宁徐学信王文浩许斐薛舜
Owner SHANDONG JIANZHU UNIV
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