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Sludge anaerobic treatment method and system

An anaerobic treatment, sludge technology, applied in the direction of biological sludge treatment, dehydration/drying/thickened sludge treatment, pyrolysis treatment of sludge, etc., can solve the problem of low organic matter content of effluent sludge and water content of effluent sludge Low yield, high organic matter content and other problems, to achieve the effect of increasing the total biogas production, good dehydration, and low organic matter content

Pending Publication Date: 2018-11-23
TIANJIN ENEW ENVIRONMENTAL PROTECTION ENGCO LTD
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Problems solved by technology

[0004] The invention provides a sludge anaerobic treatment method and system. Aiming at the problems of high content of organic matter and large yield of biogas residue in traditional anaerobic digestion, the sludge is pretreated by thermal hydrolysis, and the hydrolyzate is used for anaerobic digestion. Digestion, biogas residue reflux to thermal hydrolysis stage, thermal hydrolysis sludge is discharged, which has the advantages of less discharged sludge, low moisture content of discharged sludge, low content of organic matter in discharged sludge, and high biogas production rate of the system

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  • Sludge anaerobic treatment method and system

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Effect test

Embodiment 1

[0027] A certain municipal sludge has an organic matter content of 42%, adjust its water content to 90%, and heat-treated the sludge after thermal hydrolysis. The organic matter content of the sludge after thermal hydrolysis is 29%, and the sludge after thermal hydrolysis The sludge is dehydrated, and the released aqueous solution enters the sludge digester for anaerobic digestion, and the dehydrated sludge forms a mud cake for export; anaerobic digestion produces biogas, and the gas production is 41.26Nml / g, and the biogas residue and the organic matter of the biogas residue are discharged The content is 59%. After the biogas residue is dehydrated, part of the water enters the conditioning tank to adjust the moisture content of the sludge, and part of the water enters the sewage treatment device. The degraded sludge undergoes thermal hydrolysis reaction together.

Embodiment 2

[0029] A certain municipal sludge has an organic matter content of 27%, adjust its moisture content to 93%, and heat-hydrolyze the sludge after conditioning. The organic matter content of the sludge after thermal hydrolysis is 15%, and the sludge after thermal hydrolysis The sludge is dehydrated, and the released aqueous solution enters the sludge digester for anaerobic digestion, and the dehydrated sludge forms a mud cake for export; anaerobic digestion produces biogas, and the gas production is 31.71Nml / g, and the biogas residue is discharged, and the organic matter content of the biogas residue is After the biogas residue is dehydrated, part of the water enters the conditioning tank to adjust the moisture content of the sludge, part of the water enters the sewage treatment plant, and is discharged up to the standard after treatment. The dehydrated biogas residue enters the thermal hydrolysis tank for conditioning and conditioning The final sludge is subjected to thermal hydr...

Embodiment 3

[0031] A certain municipal sludge, its organic matter content is 55%, adjust its water content to 92%, the sludge after conditioning is subjected to thermal hydrolysis, the organic matter content of the sludge after thermal hydrolysis is 33%, and the sludge after thermal hydrolysis The sludge is dehydrated, and the released aqueous solution enters the sludge digester for anaerobic digestion, and the dehydrated sludge forms a mud cake for export; anaerobic digestion produces biogas, the gas production is 52.18Nml / g, and the biogas residue is discharged, and the organic matter content of the biogas residue is After the biogas residue is dehydrated, part of the water enters the conditioning tank to adjust the moisture content of the sludge, part of the water enters the sewage treatment plant, and is discharged up to the standard after treatment. The dehydrated biogas residue enters the thermal hydrolysis tank for conditioning and tempering The final sludge is subjected to thermal ...

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Abstract

The invention provides a sludge anaerobic treatment method and a system. The sludge anaerobic treatment method and the system aim at solving the problems of high content of organic matter and large output of biogas residue in the traditional anaerobic digestion biogas residue; the sludge is pretreated by a hot hydrolysis method, a hydrolysate is used for anaerobic digestion, the biogas residue flows back into the hot hydrolysis stage, and the hot hydrolysis sludge is discharged out. The sludge anaerobic treatment method and the system have the advantages that the amount of discharged sludge issmall, the content of water in the discharged sludge is low, the content of organic matter in the discharged sludge is low, and the output of biogas is high.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a sludge anaerobic treatment method and system. Background technique [0002] Sludge is a by-product of sewage treatment, with a large output and low disposal rate. The sludge treatment methods in my country mainly include landfill, composting, natural drying, and incineration. At present, landfill is still the main method of sludge treatment in my country. In addition, the disposal capacity of urban sewage treatment enterprises in my country is insufficient and the disposal methods are backward. A large amount of sludge has not been treated in a standardized manner, which directly causes "secondary pollution" and seriously affects the ecological environment. It not only reduces the effective treatment capacity of sewage treatment facilities, but also poses a serious threat to the ecological environment and causes a great waste of resources. Anaerobic digestion of sludge is a slud...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/10C02F11/04C02F11/12
CPCC02F11/04C02F11/10C02F11/12
Inventor 王学科
Owner TIANJIN ENEW ENVIRONMENTAL PROTECTION ENGCO LTD
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