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A kind of sludge treatment method

A sludge treatment and sludge technology, applied in the direction of sludge treatment, biological sludge treatment, water/sludge/sewage treatment, etc., can solve the problems of treatment effect impact, effect discount, etc. Effect of deodorization and reduction of heavy metal content

Active Publication Date: 2021-09-28
湖南鑫恒环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanism of microbial treatment of sludge is not yet very clear, and the interaction between different microorganisms may have a significant impact on the treatment effect; and most of the research is still in the laboratory stage, and the effect will be different when it is transformed into large-scale sludge treatment. Big discount

Method used

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  • A kind of sludge treatment method

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Experimental program
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Effect test

Embodiment 1

[0029] A sludge treatment method, comprising the steps of:

[0030] 1. Primary fermentation:

[0031] Preparation of primary fermentation bacteria: culture active Nitrobacter (ATCC14123), Nitrosomonas Europe (ATCC19718), Achromobacter denitrifying (CGMCC1.2679), Pseudomonas putida (CGMCC1.8829), Bacillus cereus Bacillus (ATCC 14579) and Streptomyces griseus (CGMCC4.5718), the concentration is about 7×10 10 CFU / mL of bacterial liquid; each bacterial liquid was divided into active Nitrobacter: Nitrosomonas europeanus: Achromobacter denitrificans: Pseudomonas putida: Bacillus cereus: Streptomyces griseus = 1:1:1 :1:3:3 volume ratio mixing.

[0032] Use 30% sodium hydroxide to adjust the pH of the sludge with a water content of 99.8% to 7.2, add 2.5 L of fermentation agent per ton of sludge, and ferment for 3 days at 28° C. and 20 r / min.

[0033] 2. Secondary fermentation:

[0034] Preparation of secondary fermentation bacteria: culture Lactobacillus plantarum (CGMCC1.573), Sa...

Embodiment 2

[0041] 1. Primary fermentation:

[0042] Preparation of primary fermentation bacteria: culture active Nitrobacter (ATCC14123), Nitrosomonas Europe (ATCC19718), Achromobacter denitrifying (CGMCC1.2679), Pseudomonas putida (CGMCC1.8829), Bacillus cereus Bacillus (ATCC 14579) and Streptomyces griseus (CGMCC4.5718), the concentration is about 7×10 10 CFU / mL of bacterial liquid; each bacterial liquid was divided into active Nitrobacter: Nitrosomonas europeanus: Achromobacter denitrificans: Pseudomonas putida: Bacillus cereus: Streptomyces griseus = 1:1:1 :1:3:3 volume ratio mixing.

[0043] Use 30% sodium hydroxide to adjust the pH of the sludge with a water content of 98.4% to 7.2, add 2.5 L of fermentation agent per ton of sludge, and ferment for 2 days at 30 ° C and 30 r / min.

[0044] 2. Secondary fermentation:

[0045] Preparation of secondary fermentation bacteria: culture Lactobacillus plantarum (CGMCC1.573), Saccharomyces cerevisiae (Angel high temperature resistant Sacch...

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Abstract

The invention discloses a sludge treatment method, comprising the following steps: (1) primary fermentation: adjusting the pH of sludge with a water content ≥ 95% to 7.0-7.5, adding a fermentation bacterial agent, and stirring and fermenting at 28-30°C 2-3d; (2) Secondary fermentation: adjust the pH of the sludge to 5-6.5, add secondary fermentation bacteria, and ferment at 34-37°C for 2-3d; (3) Microwave treatment: put the sludge at 4-6kW / L microwave radiation treatment for 2‑3min; (4) filter press treatment: use a membrane filter press to press and dehydrate the sludge to reduce the water content in the sludge to less than 30%. The present invention can effectively reduce the content of heavy metals in the sludge, kill pathogenic microorganisms, and remove odors through two fermentation treatments combined with pressure filtration and microwave treatment; furthermore, the resource utilization effect of subsequent sludge can be improved.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a sludge treatment method. Background technique [0002] During the sewage treatment process, a large amount of by-product sludge will be produced. The sludge has a high water content and contains a large amount of harmful heavy metals and pathogenic microorganisms. It releases a strong odor. If it is not handled properly, it will cause serious harm to the ecological environment and human health. [0003] Sludge resource utilization is the best way to treat sludge, including incineration, building materials, composting, etc. No matter which way you choose for sludge treatment, you must first reduce the content of heavy metals, kill pathogenic microorganisms, and remove odors to prevent impacts on subsequent utilization. [0004] The use of microorganisms to treat sludge is a relatively safe method with little impact on subsequent resource utilization. However, the mech...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C02F11/02C02F11/122
CPCC02F11/004C02F11/02C02F11/122C02F2303/02C02F2303/06
Inventor 冯浩源钟仁华钟红林蔡红春彭诗阳
Owner 湖南鑫恒环境科技有限公司