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Method for degrading polyacrylamide in domestic sludge

A polyacrylamide and domestic sludge technology, which is applied in biological sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem of large area occupied by the storage area, slow physical degradation, and secondary pollution To achieve the effect of speeding up the decomposition rate, reducing the absorption rate and promoting the transformation

Inactive Publication Date: 2019-09-03
吉林省博任环保科技有限公司
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Problems solved by technology

[0002] At present, the treatment method for domestic sludge is mainly landfill, but after the polyacrylamide in domestic sludge is flocculated, the sludge with a moisture content of 80%-85% can be naturally decomposed in nature for more than 2 years, and Odor will be generated during the degradation process. Due to the large amount of domestic sludge with high moisture content, the storage area will occupy a large area. During the stacking process, polyacrylamide will slowly degrade physically (thermally, mechanically) and chemically ( hydrolysis, oxidation and catalytic oxidation) and biodegradation, and finally produce various oligomers and highly toxic acrylamide monomers with neurotoxicity, causing secondary pollution to the environment of the storage area

Method used

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Embodiment Construction

[0010] The preferred embodiments of the present invention are described in detail below, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0011] A method for degrading polyacrylamide in domestic sludge, comprising:

[0012] (1) The domestic sludge with a moisture content of 80%-85% is mixed with the crushed straw at a weight ratio of 1:1, and the prepared materials are put into the fermentation tank.

[0013] (2) Put MOF-Ti with a weight ratio of 0.003% into the fermentation tank.

[0014] (3) After activating 0.001% fermenting bacteria with water for 20 minutes, put them into the fermenter.

[0015] (4) The temperature in the fermenter is set at the lowest temperature of 100° C. for fermentation. The fermentation period is 2 hours, and the temperature of the fermenter is maintained at 90° C.-110° C. during the fermentation.

[...

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Abstract

The invention relates to a method for degrading polyacrylamide in domestic sludge. The method comprises: pouring domestic sludge with a water content of 80-85% and crushed straws into a fermentation kettle according to a weight ratio of 1:1, adding MOF-Ti and high temperature fermentation bacteria, maintaining the temperature of the fermentation kettle at 90-110 DEG C, starting the fermentation kettle, carrying out high temperature stirring and fermenting for 2-3 h, spreading the fermented domestic sludge onto the ground, naturally cooling, and dewatering to obtain the decomposed harmless domestic sludge. According to the present invention, the method has advantages of simple operation, rapid degradation, simple process and low cost, and has broad application prospects in the treatment ofdomestic sludge containing polyacrylamide.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for degrading polyacrylamide in domestic sludge. Background technique [0002] At present, the treatment method for domestic sludge is mainly landfill, but after the polyacrylamide in domestic sludge is flocculated, the sludge with a moisture content of 80%-85% can be naturally decomposed in nature for more than 2 years, and Odor will be generated during the degradation process. Due to the large amount of domestic sludge with high moisture content, the storage area will occupy a large area. During the stacking process, polyacrylamide will slowly degrade physically (thermally, mechanically) and chemically ( Hydrolysis, oxidation and catalytic oxidation) and biodegradation, and finally produce various oligomers and highly toxic acrylamide monomers with neurotoxicity, causing secondary pollution to the environment of the storage area. How to quickly decomp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/02C02F11/12C02F101/38
CPCC02F11/02C02F11/12C02F2101/38
Inventor 林克麟邓永洪
Owner 吉林省博任环保科技有限公司
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