A composite fungus-earthworm synergistic treatment method for sewage plant residual sludge

A technology of excess sludge and synergistic treatment, applied in biological sludge treatment and other directions, can solve problems such as pathogenic bacteria contamination, and achieve the effects of low cost, mild reaction conditions and simple operation.

Inactive Publication Date: 2018-12-14
天津大学前沿技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of pathogenic bacteria pollution when sludge from sewage treatment plants is returned to the field, and to provide a method for synergistically treating excess sludge in sewage plants with composite fungi and earthworms

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Pretreatment of rice straw: crush rice straw, add urea, granulated sugar, water, and straw into the degradation bucket according to the ratio of 18:0.9:800:5000, and add 0.1% of the straw mass of compound fungi (green wood mold, Aspergillus niger, and Penicillium citrinum according to the ratio of 1.5:1:1) were cultivated in a constant temperature incubator at a constant temperature of 30°C for 10 days to obtain pretreated rice straw;

[0026] (2) Take the dehydrated residual sludge (moisture content ≤ 30%) from the domestic sewage treatment plant and blend evenly with the pretreated rice straw in a ratio of 3:1;

[0027] (3) Put 1.5kg of straw and sludge mixture in a disposable flowerpot, add 50 adult red earthworms Taiping No. 10 ~10 11 down to 10 6 ~10 7 indivual.

Embodiment 2

[0029] (1) Pretreatment of rice straw: pulverize rice straw, add urea, granulated sugar, water, and straw into the degradation barrel according to the ratio of 20:1:1000:5000, and add 0.3% compound fungus (Trichoderma viride , Aspergillus niger, and Penicillium citrinum were cultivated at a ratio of 1.5:1:1) in a constant temperature incubator at 35°C for 12 days to obtain pretreated rice straw.

[0030] (2) Take the dehydrated residual sludge (water content ≤ 30%) from the domestic sewage treatment plant and blend evenly with the pretreated straw according to the ratio of 4:1.

[0031] (3) Put 1.5kg of straw and sludge mixture in a disposable flower pot, add 80 adult red earthworms Taiping No. 11 ~10 10 down to 10 6 ~10 7 indivual.

Embodiment 3

[0033] (1) Pulverize the rice straw, add urea, granulated sugar, water, and straw into the degradation barrel according to the ratio of 22:1.5:1100:5000, and add 0.5% of the straw quality compound fungus (Trichoderma viride, Aspergillus niger, orange green mold according to the ratio of 1.5:1:1) in a constant temperature incubator at 37°C for 10 days at a constant temperature to obtain pretreated rice straw.

[0034] (2) Take the dehydrated residual sludge (water content ≤ 30%) from the domestic sewage treatment plant and blend evenly with the pretreated straw at a ratio of 5:1.

[0035] (3) Put 1.5kg of straw and sludge mixture in a disposable flower pot, add 100 adult red earthworms Taiping No. 10 ~10 11 down to 10 5 ~10 6 indivual.

[0036] The present invention uses composite fungi and earthworms to synergistically treat sewage treatment plant sludge, and the presence of earthworms can cause antagonism to bacteria in the sludge, resulting in a significant decrease in t...

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PUM

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Abstract

A composite fungus-earthworm synergistic treatment method for sewage plant residual sludge is disclosed. The method includes mixing urea, granulated sugar, water and straw according to a ratio, addingthe mixture into a degradation barrel, adding composite funguses, performing constant-temperature culture in a constant-temperature culture tank at 35-39 DEG C for 10-14 d to obtain pretreated rice straw, fully mixing dehydrated residual sludge and the pretreated rice straw according to a ratio, adding earthworms into the straw-sludge mixture, and treating the mixture at 20-30 DEG C in a moistureenvironment for 15-20 d. Sewage plant sludge is degraded by utilizing the earthworms, the funguses and other protists, reaction conditions are mild, and secondary pollution caused by sludge to the environment is reduced. The method is low in cost and simple to operate and can effectively reduce toxic harmful bacteria and other microbes in the sludge.

Description

technical field [0001] The invention belongs to the field of microbial degradation of industrial solid waste, and in particular relates to a method for synergistically treating excess sludge in a sewage plant with composite fungi and earthworms. Background technique [0002] Sewage treatment plant sludge is the sedimentary substance produced in the sewage treatment process, including solid particles such as mud, sand, fibers and coagulated flocs in sewage, various colloids, organic matter and adsorbed metal elements, microorganisms, etc. With the increase of urbanization, the sludge of urban domestic sewage treatment plants has also increased sharply. It is predicted that by 2020, the sludge output will exceed 60 million tons per year. The sludge problem has become a problem that sewage treatment plants are currently facing. important issues and challenges. The main methods of sludge treatment are sanitary landfill, incineration and land utilization. At present, 34.48% of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/02
CPCC02F11/02
Inventor 袁东孙培张晴
Owner 天津大学前沿技术研究院
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