A method for reducing excess sludge

A treatment method and technology for excess sludge, applied in the fields of sludge treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of increasing chemical pollution, increasing treatment costs, etc., to simplify the operation process and save money. Investment cost, reduction effect

Active Publication Date: 2016-01-20
广西益江环保科技股份有限公司
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Problems solved by technology

[0004] The above methods need to add chemicals for treatment, which not only increases the treatment cost, but also easily increases chemical pollution.

Method used

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  • A method for reducing excess sludge

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Experimental program
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Effect test

Embodiment 1

[0023] (1) Sludge intake and drainage: When mud intake, drainage and sludge discharge, the mud-water mixture in the reaction tank does not undergo circulation reaction and aeration, and the sludge to be treated enters the reaction tank in the way of upward flow from the bottom of the reaction tank by lifting the material pump , control the flow rate of the mud-water mixture in the reaction tank to 0.4m / h, the driving action of the mud water in the reaction tank will discharge the sewage separated from the upper part of the reaction tank from the outlet pipe at the upper part of the reaction tank, and the inorganic sludge after digestion and reduction will flow from the bottom of the reaction tank The internal mud discharge pipe is discharged regularly;

[0024] (2) Biochemical reaction: During the reaction period, the reaction tank does not enter the mud and drain the mud, and use the lifting effect of the material pump to make the mud-water mixture in the reaction tank circula...

Embodiment 2

[0027] (1) Sludge intake and drainage: When mud intake, drainage and sludge discharge, the mud-water mixture in the reaction tank does not undergo circulation reaction and aeration, and the sludge to be treated enters the reaction tank in the way of upward flow from the bottom of the reaction tank by lifting the material pump , control the upward flow velocity of the mud-water mixture in the reaction tank to 0.5m / h, the driving action of the mud water in the reaction tank will discharge the sewage separated from the upper part of the reaction tank from the outlet pipe at the upper part of the reaction tank, and the inorganic sludge after digestion and reduction will flow from the bottom of the reaction tank The internal mud discharge pipe is discharged regularly;

[0028] (2) Biochemical reaction: During the reaction period, the reaction tank does not enter the mud and drain the mud, and use the lifting effect of the material pump to make the mud-water mixture in the reaction t...

Embodiment 3

[0031](1) Sludge intake and drainage: When mud intake, drainage and sludge discharge, the mud-water mixture in the reaction tank does not undergo circulation reaction and aeration, and the sludge to be treated enters the reaction tank in the way of upward flow from the bottom of the reaction tank by lifting the material pump , control the upward flow velocity of the mud-water mixture in the reaction tank to 0.3m / h, the driving action of the mud water in the reaction tank will discharge the sewage separated from the upper part of the reaction tank from the outlet pipe at the upper part of the reaction tank, and the inorganic sludge after digestion and reduction will flow from the bottom of the reaction tank The internal mud discharge pipe is discharged regularly;

[0032] (2) Biochemical reaction: During the reaction period, the reaction tank does not enter the mud and drain the mud, and use the lifting effect of the material pump to make the mud-water mixture in the reaction ta...

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Abstract

The invention discloses a method for reducing the amount of excess sludge, which is characterized in that the excess sludge is treated by adopting an intermittently operated circulating upstream high-concentration sludge bed process, and one treatment cycle includes sludge intake, drainage, sludge discharge, biochemical reaction and sludge discharge. There are three steps of mud sedimentation. The remaining sludge flows into the reaction tank and circulates in the system composed of the reaction tank, return pipe, aeration tank and material pump. The aerator aerates and oxygenates the mud-water mixture in the aeration tank. The mud-water mixture alternately undergoes aerobic-facultative-anaerobic biochemical reactions, the organic matter in the remaining sludge is degraded, converted and removed, and the large-particle sludge is precipitated in the reaction tank and discharged to achieve sludge reduction. The method of treating excess sludge by the present invention has less investment in equipment, simple operation, no need to add chemicals, low energy consumption, good sludge reduction effect, and good economic and environmental benefits.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and relates to a method for reducing excess sludge, in particular to a method for reducing sludge in an intermittent circulation upstream high-concentration sludge bed treatment process. Background technique [0002] With the development of cities and the continuous expansion of urban population, the discharge of industrial wastewater and domestic sewage is increasing, and the corresponding sludge output in the process of sewage treatment is also increasing rapidly. According to the statistics of the Ministry of Housing and Urban-Rural Development, as of the end of March 2014, a total of 3,622 sewage treatment plants have been built in cities and counties (excluding other towns) nationwide, with a sewage treatment capacity of about 153 million cubic meters per day, an increase of about 430 from the end of 2013. 10,000 cubic meters per day. Activated sludge method is currently the most w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00
Inventor 胡湛波周权能李振友
Owner 广西益江环保科技股份有限公司
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