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Immobilized thermophilic microflora for treating municipal sludge as well as preparation and use methods thereof

A technology for thermophilic microorganisms and municipal sludge, applied in the field of immobilized thermophilic microbial flora, can solve the problems of environmental safety hazards, reduce sludge water content, social impact, etc., achieve high mechanical strength, strong tolerance, Not easy to lose effect

Inactive Publication Date: 2019-12-20
湖南洁源生物能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the municipal sludge must be dried before its discharge and utilization to reduce the water content of the sludge. However, the traditional treatment methods (landfill, composting, digestion and incineration, etc.) all have environmental safety hazards and bring social influence

Method used

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  • Immobilized thermophilic microflora for treating municipal sludge as well as preparation and use methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Streptococcus thermophilus, Bacillus coagulans and Candida utilis were activated and enriched to the logarithmic phase of growth, and the culture medium OD 600 was 2.5, and the bacterial fluids of Streptococcus thermophilus, Bacillus coagulans and Candida utilis were obtained respectively. Detect the bacterial counts of Streptococcus thermophilus, Bacillus coagulans and Candida utilis, and mix them according to the percentage of the bacterial counts of each strain to the total bacterial count of thermophilic microorganisms. Bacillus 15%, Bacillus subtilis 15%, Cellulomonas lutea 23% and Candida utilis 27%.

[0030] Put 40-mesh sawdust into 15% sodium sulfite solution at a ratio of 60% by weight, adjust the pH to 4.0, soak at 60°C for 48 h, and rinse with water. 20% NaOH to neutralize, wash with water, and dry. Mix sawdust with Streptococcus thermophilus, Bacillus coagulans and Candida utilis in a weight ratio of 100:40, expose at room temperature for 90 h, and dry at 40...

Embodiment 2

[0033] Streptococcus thermophilus, Bacillus coagulans, Cellulomonas xanthogenes and Candida utilis were activated and enriched to the logarithmic phase of growth, and the culture medium OD 600 was 2.3, and the bacterial liquids of Streptococcus thermophilus, Bacillus coagulans, Cellulomonas chrysogenum and Candida utilis were obtained respectively. Detect the bacterial counts of Streptococcus thermophilus, Bacillus coagulans, Cellulomonas chrysogenum and Candida utilis, and mix them according to the percentage of the bacterial counts of each strain to the total bacterial count of the thermophilic microbial flora. Streptococcus 25%, Bacillus coagulans 20%, Cellulomonas lutea 25%, and Candida utilis 30%.

[0034] Mix zeolite and sepiolite with Streptococcus thermophilus, Bacillus coagulans, Cellulomonas chrysogenum and Candida utilis in a weight ratio of 100:43, wherein the mass of zeolite and sepiolite The ratio is 1:1. Expose at room temperature for 92 hours, and dry at 43ºC...

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Abstract

The invention relates to the technical field of biological fermentation, in particular to an immobilized thermophilic microflora for treating municipal sludge as well as preparation and use methods thereof. The microflora is formed by compounding thermophilic bacteria and thermophilic yeast; through immobilization, the thermophilic microflora is in the best growth state in the municipal sludge biological drying process and the cultures are mutually synergistic and are not mutual antagonistic, so the growth of harmful microorganisms is effectively inhibited, the degradation effect and the deodorization effect of the sludge are greatly improved, the sludge drying time is greatly shortened, the water content of the municipal sludge is significantly reduced and the sludge reducing effect is good.

Description

technical field [0001] The invention relates to the technical field of fermentation biology, in particular to an immobilized thermophilic microbial flora for treating municipal sludge and its preparation and use methods. Background technique [0002] With the increase of urban domestic sewage, the output of municipal sludge in my country is increasing day by day. It is estimated that the total output of municipal sludge will reach 60 million tons by 2020. Sludge reduction and resource utilization have gradually become the strategic needs of national development. Improper disposal of sludge is likely to cause secondary pollution, which will not only affect the treatment capacity of the sewage treatment system, but also pose a serious threat to the ecological environment and human activities. Sludge is a waste produced in the process of sewage treatment. Its own composition is relatively complex, and its water content can be as high as 90%. It has a high content of refractory ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20C12N1/16C12N11/14C02F11/02C02F11/12C12R1/46C12R1/07C12R1/125C12R1/01C12R1/72
CPCC12N1/20C12N1/16C12N11/14C02F11/02C02F11/12
Inventor 曾虹燕邢喜成张卫平张栋徐圣
Owner 湖南洁源生物能源科技有限公司
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