Remaining active sludge deep process decrement method

A technology for residual activity and sludge, which is applied in the fields of sludge treatment, pyrolysis treatment of sludge, chemical instruments and methods, etc., can solve the problems of large amount of chemical agent, low reduction efficiency, poor stability, etc., and achieve the treatment cost. Low, good reduction effect, simple process effect

Inactive Publication Date: 2019-06-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to overcome the problems of low reduction efficiency, poor stability, high energy consumption or large amount of chemical agents in the sludge reduction process in the prior art

Method used

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  • Remaining active sludge deep process decrement method

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Experimental program
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Embodiment approach

[0030] Such as figure 1 Shown, the embodiment of a kind of excess activated sludge depth process reduction method of the present invention is as follows:

[0031] (1) Sewage enters the sewage biochemical treatment system 1 for biochemical treatment. The sewage biochemical treatment system 1 is filled with hydrophilic biological fillers, which can be suspended formaldehyde vinylon silk fillers, or hydrophilic modified polyethylene, polyester, etc. Propylene or polyurethane suspension filler, the filling volume ratio in the sewage biochemical treatment system 1 is 20-50%, and the preferred range is 30-40%;

[0032] (2) The remaining activated sludge after the biochemical treatment in step (1) enters the remaining activated sludge concentration system 2. The required concentration range of the concentrated sludge is 5-30g / L, and a part of the concentrated remaining activated sludge enters the remaining active sludge The sludge dewatering system 3 performs dehydration treatment, ...

Embodiment 1

[0038] Characteristics of residual activated sludge: 1m of sludge in the biochemical treatment process sludge thickening tank of a sewage treatment plant 3 , the sludge indicators are: mixed suspended solids concentration (MLSS) is 16.8g / L, mixed liquor volatile suspended solids concentration (MLVSS) is 11.9g / L, organic matter percentage is 70.8%.

[0039] The implementation steps of the above-mentioned residual activated sludge treatment are as follows:

[0040] (1) The sewage enters the sewage biochemical treatment system 1. The sewage biochemical treatment system 1 is filled with hydrophilic biological fillers. The filling volume ratio in the sewage biochemical treatment system 1 is 30%, and the biological fillers are hydrophilic modified polyurethane porous suspension fillers. ;

[0041] (2) The excess activated sludge after the biochemical treatment in step (1) enters the excess activated sludge concentration system 2, and a part of the concentrated excess activated sludge...

Embodiment 2

[0048] Characteristics of residual activated sludge: 1m of sludge in the biochemical treatment process sludge thickening tank of a sewage treatment plant 3 , the sludge indicators are: mixed suspended solids concentration (MLSS) is 16.8g / L, mixed liquor volatile suspended solids concentration (MLVSS) is 11.9g / L, organic matter percentage is 70.8%.

[0049] The implementation steps of the above-mentioned residual activated sludge treatment are as follows:

[0050] (1) The sewage enters the sewage biochemical treatment system 1. The sewage biochemical treatment system 1 is filled with hydrophilic biological fillers. The filling volume ratio in the sewage biochemical treatment system 1 is 20%, and the biological fillers are hydrophilic modified polyethylene suspension fillers. ;

[0051] (2) The excess activated sludge after the biochemical treatment in step (1) enters the excess activated sludge concentration system 2, and a part of the concentrated excess activated sludge ente...

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Abstract

The invention relates to the technical field of solid waste treatment, particularly to a remaining active sludge deep process decrement method. A purpose of the present invention is to overcome the problems of low decrement efficiency, poor stability, high energy consumption or large chemical agent consumption and the like in the sludge decrement process in the prior art. According to the presentinvention, a biochemical system embedded thermal hydrolysis sludge cracking technology and a biological filler are combined to achieve the active sludge deep process decrement; and the remaining active sludge deep process decrement method has advantages of good decrement effect, low treatment cost, mature technology, reliability, simple process and the like, can effectively reduce the percentage of the organic matter in the remaining active sludge and greatly reduce the amount of the remaining active sludge and the treatment cost, and further has good economic and application value.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, and is a method for reducing the amount of excess activated sludge in the deep process, in particular, it is a combination of biochemical system embedded thermal hydrolysis sludge cracking technology and biological fillers to realize the deep process of activated sludge method of reduction. Background technique [0002] Activated sludge method is currently the most widely used sewage treatment method. It utilizes the biological coagulation, adsorption and oxidation of activated sludge to decompose and remove organic pollutants in sewage. It has the significant advantages of low treatment cost and high efficiency. However, in the process of sewage treatment by activated sludge method, a large amount of excess activated sludge will also be produced at the same time. Excess activated sludge is an extremely complex heterogeneous body composed of organic matter fragments, bacterial cells...

Claims

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Application Information

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IPC IPC(8): C02F3/00C02F3/34C02F11/121C02F11/18C02F11/10
Inventor 魏令勇李昕阳邱松杨芳芳侯秀华
Owner CHINA PETROLEUM & CHEM CORP
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