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Sludge decomposition pretreatment method

A treatment method and sludge technology, applied in sludge treatment, biological sludge treatment, sewage/sludge fertilizer, etc., can solve the problems of low microbial temperature rise, long decomposing time, and slow efficiency, so as to speed up decomposing and improve composting Temperature, the effect of increasing the decomposing efficiency

Inactive Publication Date: 2016-09-28
金中钟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical application, the inventors found that due to the poor air permeability of the composting system in the early stage, only anaerobic and facultative anaerobic microorganisms started to work, but the temperature rise of these microorganisms was low, only 30-40°C, and the water evaporated and lost slowly, making It is difficult for aerobic microorganisms to work due to lack of oxygen. They can only rely on continuous turning, drying, and air-drying to reduce moisture, thereby creating a working environment for aerobic microorganisms.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Add the organic material dry powder mixed with yeast to the sludge for mixing, and add yeast and nuclear quantitative organic material dry powder at a ratio of 0.1kg per cubic sludge to obtain a sludge mixture with a moisture content of 50%. Subsequently, the sludge mixture material is made into blocks, and the organic material dry powder added with aerobic decomposing bacteria is applied to the surface of the formed sludge material, wherein the proportion of 0.25kg per cubic sludge is added Oxygen decomposing bacteria and nuclear quantitative dry powder of organic materials; when the sludge is matured and the temperature of the stockpile is lower than 45°C, add aerobic actinomycetes at a rate of 1kg per cubic meter of compost at this time, and mix them with the compost turning machine Composting starts to work at about 35°C and moisture content of about 40%. It continues to deeply degrade the organic matter and minerals in the compost, and secretes gibberellin, cytokini...

Embodiment 2

[0040] Add the dry powder of organic materials mixed with yeast to the sludge for mixing, wherein 0.15 kg of dry powder of organic materials is added to the sludge in a ratio of 0.15 kg per cubic sludge to obtain a sludge mixture with a moisture content of 60%. Subsequently, the sludge mixture material is made into blocks, and the organic material dry powder added with aerobic decomposing bacteria is applied to the surface of the molded sludge, wherein the aerobic powder is added in a ratio of 0.5kg per cubic sludge. Decomposing bacteria and nuclear quantitative dry powder of organic materials; when the sludge is mature and enters the cooling stage, when the temperature of the stockpile is lower than 45°C, add aerobic actinomycetes at a rate of 1.5kg per cubic meter of compost at this time, and turn the compost with the turning machine Mixed with compost, it starts working at around 35°C and 40% moisture, and continues to deeply degrade the organic matter and minerals in the co...

Embodiment 3

[0042] Add the dry powder of organic materials mixed with yeast to the sludge for mixing, wherein 0.25kg of dry powder of yeast and the quantitative amount of organic materials are added to the sludge to obtain a sludge mixture with a moisture content of 55%. Subsequently, the sludge mixture material is made into blocks, and the organic material dry powder added with aerobic decomposing bacteria is applied to the surface of the molded sludge, wherein the aerobic decomposing bacteria are added in a ratio of 1 kg per cubic sludge. Dry powder of organic materials with quantitative bacteria and nuclei; when the sludge heap is mature and the temperature of the stockpile is lower than 45°C, add aerobic actinomycetes according to the ratio of 2kg per cubic meter of compost at this time, and mix it into the compost with the turning machine. Start working at about 35°C and about 40% moisture, continue to degrade the organic matter in the compost, and secrete gibberellin, cytokinin, auxi...

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Abstract

The invention provides a sludge decomposition pretreatment method, and belongs to the technical field of sludge treatment. The method can increase the air permeability of a system and shorten the decomposition period in the sludge treatment process. The sludge decomposition pretreatment method comprises the following steps: mixing sludge with organic material dry powder containing facultative anaerobes to obtain a sludge mixture with the water content of 50-60%; carrying out molding treatment on the sludge mixture, and coating the surface of the molded sludge mixture with organic material dry powder containing aerobic decomposing bacteria; and separating the molded sludge mixture from superfluous organic material dry powder, and carrying out compost decomposition. The method can be used in the sludge decomposition pretreatment stage.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a pre-treatment method for sludge decomposing. Background technique [0002] Sludge is the product of sewage treatment, which is a complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, colloids, etc. With the rapid development of the sewage treatment industry, the amount of sludge produced is increasing, but the problem of sludge disposal has been shelved for a long time, making the problem of sludge safe disposal increasingly urgent. Compared with sludge disposal methods such as landfill and incineration, composting can realize the resource utilization of sludge and is the most promising sludge treatment method. [0003] At present, aerobic composting is mostly used for composting. Specifically, composting begins after mixing sludge with low-moisture organic material dry powder added with compound decomposing bacteria. However, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F15/00C05F17/00C02F11/02
CPCC02F11/02C05F5/00C05F17/00C05F5/002C05F7/00C05F11/00C05F11/02C05F11/08Y02W10/20Y02W30/40
Inventor 金中钟
Owner 金中钟
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