A kind of sewage treatment and recycling equipment and method

A technology for sewage treatment and equipment, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. Achieve the effect of reducing energy consumption, reducing membrane area and improving working conditions

Active Publication Date: 2015-09-16
四川省水处理及资源化工程技术研究中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high sludge content in the sewage during filtration, the water flow rate of the filter membrane is low, which is easy to cause membrane clogging, and continuous cleaning of large pores and frequent backwashing are required, so the service life of the membrane is short

Method used

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  • A kind of sewage treatment and recycling equipment and method
  • A kind of sewage treatment and recycling equipment and method
  • A kind of sewage treatment and recycling equipment and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1 3AO biochemical reaction pool

[0044] like figure 1 As shown, a 3AO biochemical reaction pool is composed of the first anoxic pool A1, the anaerobic pool A2, the second anoxic pool A3 and the aerobic pool O, and the four pools are respectively equipped with agitators and flowmakers , the first anoxic pool A1, the anaerobic pool A2 and the second anoxic pool A3 are connected end to end in turn, the aerobic pool O adopts an oxidation ditch form, and its end is connected with the second anoxic pool A3, and part of the sewage is in The end of the aerobic pool flows back to the A3 pool, and the first anoxic pool A1 is provided with a water inlet. After the pretreated sewage 31 is mixed with the return concentrated liquid 33 and / or the return sludge 32, it enters the first anoxic pool through the water inlet. Pool A1; the aerobic pool is provided with a vent, and the end of the aerobic pool O is also provided with a water outlet, and the biochemically treated sewa...

Embodiment 2

[0046] Example 2 Sewage treatment system

[0047] like figure 2 As shown, a sewage treatment and recycling equipment includes a biochemical reaction tank, a high-efficiency sedimentation tank and a membrane filtration unit. Described biochemical reaction pond is the 3AO biochemical reaction pond described in embodiment 1

[0048] The high-efficiency sedimentation tank such as image 3 As shown, it includes water inlet pipe 1, buffer zone 2, sludge discharge pump 3, inclined pipe or inclined plate 4, clear water area 5, outlet pipe 6 and sludge discharge pipe 7; after the sewage enters the sedimentation tank, it first passes through the buffer zone, and then the sludge Under the action of the inclined pipe or inclined plate 4, it settles quickly and is discharged through the mud discharge pump 3 and the mud discharge pipe 7, and the clean water in the clean water area 5 is discharged through the outlet pipe 6 and enters the membrane filtration unit. The bottom of the sedime...

Embodiment 3

[0052] A sewage treatment and recycling process, using the equipment described in Example 2, using a combination of biochemical treatment, high-efficiency sedimentation and membrane filtration, the sewage after biochemical treatment first enters a high-efficiency sedimentation tank to settle out most of the sludge, followed by membrane filtration. The specific operation steps are (such as Figure 6 shown):

[0053] (1) The new sewage from the pretreatment system is mixed with the reflux concentrate and / or reflux sludge and enters the first anoxic pool A1 for anoxic denitrification and denitrification reaction;

[0054] (2) The sewage enters the anaerobic pond (A2) from the first anoxic pond (A1). Under the anaerobic environment, the phosphorus accumulating bacteria in the sewage release phosphorus to generate energy to absorb and rapidly degrade organic matter, and convert it into poly-β-hydroxy Butyric acid is stored;

[0055] (3) The sewage enters the second anoxic pond (...

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Abstract

The invention discloses a process method for sewage treatment and recycling and a device for the process method. The sewage treatment system is mainly composed of a biochemical treatment module, a precipitation module and a membrane filtering module; by adopting the mode of combining the biochemical treatment, efficient precipitation and membrane filtering, the biochemically treated sewage firstly enters an efficient precipitation pool to precipitate so as to remove most of the sludge, and the membrane filtering is performed. The modular combination is less in investment, stable and reliable in operation, low in operation cost and less in occupied area.

Description

technical field [0001] The invention belongs to the field of wastewater treatment and resource utilization, and in particular relates to a process and equipment for wastewater treatment and recycling. Background technique [0002] There have been more than 100 years of history in the research and application of urban domestic sewage treatment process methods, and the main processes include biochemical methods and physical chemical methods. Driven by technological progress in related industries, the sewage treatment industry has produced a large number of the latest technological achievements with commercial value, but the current engineering applications of these technological achievements are not ideal. On the other hand, due to the improvement of sewage discharge standards and the requirements for energy saving and consumption reduction, technology integration and technology integration are required. Using new technologies, new processes, new materials and new equipment th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 宋宝增李洪徐庆元罗明仁黄卫东
Owner 四川省水处理及资源化工程技术研究中心有限公司
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