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Comprehensive treatment technology for municipal domestic sludge

A technology for comprehensive treatment of municipal domestic sludge, applied in the field of comprehensive treatment of municipal domestic sludge, to achieve the effects of improving resource utilization efficiency, improving soil structure, and avoiding secondary pollution

Inactive Publication Date: 2015-03-25
新疆天物生态环保股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems existing in the single fermentation of municipal domestic sludge in the prior art, the present invention provides a comprehensive treatment process for municipal domestic sludge, which adopts a combined treatment mode of anaerobic digestion and high-temperature aerobic fermentation, on the one hand overcomes the It overcomes the shortcomings of sludge anaerobic digestion and high-temperature aerobic fermentation sludge treatment methods, and inherits the advantages of the above two treatment methods. The reduction and harmless treatment, and improve the utilization rate of resources

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  • Comprehensive treatment technology for municipal domestic sludge

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Effect test

Embodiment 1

[0039] Municipal domestic sludge comprehensive treatment process of the present invention is as follows:

[0040] 1. Cultivation of anaerobic methanogenic bacteria liquid: The strains were purchased from the strains independently screened by the Chengdu Biogas Institute of the Ministry of Agriculture, and are now preserved in the China Agricultural Microbial Strain Collection Management Center, Methanobrevibacte.00117. The cultivation of anaerobic methanogens is to use domestic sludge leachate, add cornmeal (or potato leachate) with a mass percentage of sludge leachate of 5%, and then add anaerobic methanogen Methanobrevibacte with a mass percentage of sludge leachate of 5% .00117 seed liquid, anaerobic culture at 30°C for 3 days, can obtain the methane bacteria liquid for cultivating and propagating.

[0041] 2. Domestic sewage treatment: A certain urban domestic sewage treatment plant can produce 300 tons of fresh urban domestic sludge every day. The sludge is transported to...

Embodiment 2

[0045] Municipal domestic sludge comprehensive treatment process of the present invention is as follows:

[0046] 1. Cultivation of anaerobic methanogenic bacteria liquid: The strains were purchased from the strains independently screened by the Chengdu Biogas Institute of the Ministry of Agriculture, and are now preserved in the China Agricultural Microbial Strain Collection Management Center, Methanobrevibacte.00117. The cultivation of anaerobic methanogens is to use domestic sludge leachate, add cornmeal (or potato leachate) with a mass percentage of sludge leachate of 5%, and then add anaerobic methanogen Methanobrevibacte with a mass percentage of sludge leachate of 5% .00117 seed liquid, anaerobic culture at 30°C for 4 days, can obtain the methane bacteria liquid for cultivating and propagating.

[0047] 2. Domestic sewage treatment: A certain urban domestic sewage treatment plant can produce 300 tons of fresh urban domestic sludge every day. The sludge is transported to...

Embodiment 3

[0051] Municipal domestic sludge comprehensive treatment process of the present invention is as follows:

[0052]1. Cultivation of anaerobic methanogenic bacteria liquid: The strains were purchased from the strains independently screened by the Chengdu Biogas Institute of the Ministry of Agriculture, and are now preserved in the China Agricultural Microbial Strain Collection Management Center, Methanobrevibacte.00117. The cultivation of anaerobic methanogens is to use domestic sludge leachate, add cornmeal (or potato leachate) with a mass percentage of sludge leachate of 5%, and then add anaerobic methanogen Methanobrevibacte with a mass percentage of sludge leachate of 5% .00117 seed liquid, anaerobic culture at 30°C for 5 days to obtain the methane bacteria liquid for cultivation and propagation.

[0053] 2. Domestic sewage treatment: A certain urban domestic sewage treatment plant can produce 300 tons of fresh urban domestic sludge every day. The sludge is transported to th...

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Abstract

The invention provides a comprehensive treatment technology for municipal domestic sludge. The comprehensive treatment technology comprises the following steps: (1), the municipal domestic sludge is subjected to anaerobic fermentation and digestion treatment; and (2), residual sludge after anaerobic fermentation and digestion treatment is subjected to high-temperature aerobic fermentation. After two treatment processes, the municipal domestic sludge is thoroughly decomposed, finally changed to nutrient soil containing high organic matters and total NPK (nitrogen, phosphorus and potassium) nutrients, and can be used for producing various organic fertilizer products through processing. By means of the comprehensive treatment technology, not only can the municipal domestic sludge be thoroughly reduced and harmless, but also a series of environmental pollution for the air, the earth's surface, the water body and the like due to the municipal domestic sludge can be eliminated completely, the resource utilization rate of the municipal domestic sludge is increased, biogas can be produced and prepared at the anaerobic fermentation stage, sludge decomposed nutrient soil can be used for processing various organic fertilizers for landscaping, agriculture and the like at the high-temperature aerobic fermentation stage, the soil organic matters are increased, and the soil structure is improved.

Description

technical field [0001] The invention relates to a comprehensive treatment process of municipal domestic sludge. Background technique [0002] Municipal domestic sludge has the characteristics of large volume, unstable physical and chemical properties, easy corruption in stacking, and irritating odor. If it is not properly treated, disposed and utilized, it will cause serious secondary pollution to the environment. The common disposal methods of sludge include agricultural utilization of sludge, sanitary landfill, incineration treatment, material processing and ocean consumption, etc. Among the final disposal methods of many sludges, the agricultural use of sludge is one of the most economical, environmentally friendly and practical methods. It can stabilize, reduce, harmless and recycle sludge, and has been obtained at home and abroad. widely used. [0003] In the comprehensive treatment of municipal domestic sludge, due to the low content of heavy metals and high organic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F5/00C05F17/00
CPCC05F7/00C05F17/50Y02A40/20Y02E50/30Y02W30/40
Inventor 蔡宜东何薇郭志国陈秀敏丁丽刘淑萍杨娜李京华刘欢田佳俊王君岩
Owner 新疆天物生态环保股份有限公司
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