Thermophile complex inoculant and method thereof for degrading excess sludge

A technology of thermophilic microorganisms and composite bacterial agents, which is applied in the field of thermophilic microbial composite bacterial agents and their degradation of excess sludge, and the use of thermophilic microbial composite bacterial agents to degrade excess sludge can solve the problem of harmless disposal of excess sludge , reduction, recycling, residual sludge is difficult to harmless, reduction and resource processing and other issues, to achieve the effect of improving degradation efficiency

Inactive Publication Date: 2017-07-25
SHANGHAI ZHONGHAILONG NEW ENERGY
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Problems solved by technology

[0004] The purpose of the present invention is to provide a thermophilic microbial composite bacterial agent that is convenient to be used to solve the above-mentioned problems that the remaining sludge is difficult to be harmless, reduced, and resourced.
[0005] The purpose of the present invention is to provide a thermophilic microbial composite bacterial agent that is convenient to use to solve the problem of harmless, reduced and resourceful treatment of excess sludge generated in urban sewage treatment

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  • Thermophile complex inoculant and method thereof for degrading excess sludge

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Embodiment Construction

[0018] Sampling was taken from soil, oil-contaminated samples, plant straw compost, and sludge compost. After separation, screening, and identification, five strains of thermophilic microorganisms including Bacillus steatosis, Geobacillus pumilus, Bacillus pumilus, Bacillus subtilis and actinomycetes were obtained. Bacillus steatosis, Bacillus geobacillus, Bacillus pumilus, Bacillus subtilis and actinomycetes were respectively cultured in self-made liquid culture at 50°C, 150rpm for 72 hours; The volume ratio of the culture solution of actinomycetes is 3:3:3:2:2; then it is dried to make a composite bacterial agent. Adjust the temperature of the sludge to be degraded to 65°C, pH to 11, and DO to 1-3mg / L; inoculate the thermophilic microbial compound bacterial agent into the sludge at an inoculation amount of 5% to carry out the aerobic fermentation pre-treatment for the first 2 days. treatment, and extend the hydraulic retention time until the end of aerobic fermentation; stop...

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Abstract

The invention discloses a thermophile complex inoculant and a method thereof for degrading excess sludge. The thermophile complex inoculant is prepared by uniformly mixing five thermophiles, namely, bacillus stearothermophilus, geobacillus sp, bacillus pumilus, bacillus subtilis and actinomycetes at the ratio of 3 to 3 to 3 to 2 to 2, wherein the five thermophiles are obtained by separating from soil, a petroleum pollution sample, composted plant straws and composted sludge, screening and identifying. The thermophile complex inoculant, under certain conditions, can degrade 70% of excess sludge after 5d fermentation, and can completely degrade the excess sludge within 10d. With the application of the thermophile complex inoculant, excess sludge composting efficiency can be improved and degradation of organic matters can be accelerated; therefore, the thermophile complex inoculant takes an important role in excess sludge treatment and recycling. The method is convenient to operate, relatively good in economic performance and easy for management; and the method shows a good application potential.

Description

technical field [0001] The invention relates to a thermophilic microbial compound bacterial agent and a method for degrading excess sludge thereof, which is a technique for degrading excess sludge by using a thermophilic microbial compound bacterial agent, and belongs to the field of environmental protection. Background technique [0002] Residual sludge is the part of the sludge that is deposited in the secondary sedimentation tank during the urban sewage treatment process and is discharged to the outside of the system after being removed and returned to the aeration tank for reprocessing sewage. At present, sewage treatment plants in major cities across the country mostly use landfill and incineration to treat excess sludge in order to prevent secondary pollution. At present, due to insufficient processing capacity and imperfect sludge composting technology in our country, the resource utilization rate of excess sludge is extremely low, which not only takes up a lot of lan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20C02F11/02C05F7/00C05F17/00C12R1/07C12R1/125
CPCC02F11/02C02F2303/06C05F7/00C05F17/00C12N1/20C05F11/08Y02W10/20Y02W30/40Y02A40/20
Inventor 朱恩灿邢斌陈金艳杨丽
Owner SHANGHAI ZHONGHAILONG NEW ENERGY
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