Sludge composting method and organic fertilizer

A composting method and organic fertilizer technology, applied in the field of composting, can solve the problems of limited applicability of composting products, long fermentation time, large floor area, etc., and achieve the effects of reducing secondary pollution, increasing fermentation rate, and improving production efficiency

Inactive Publication Date: 2019-06-25
XIAMEN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above method requires a large floor area and a long fermentation time, and the applicable objects of composting products are limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of sludge composting method, concrete steps are as follows:

[0038] S1: Use sludge, mushroom residue and wood as raw materials, and crush the raw materials. The mass ratio of sludge, mushroom residue and wood block is 4:3:3, and the moisture content of sludge is not higher than 55%. Sludge and wood blocks are mixed evenly first, and then mixed with mushroom slag, and the humidity of the material is controlled. The C / N of the material is controlled at 1:25-30. The temperature of the pile is monitored in real time to keep the temperature of the pile at 55-60°C. between.

[0039]S2: the uniformly mixed material is piled up in the Gore membrane, and the compound microbial enzyme fermentation bacterium liquid is added. The addition of the compound microbial enzyme fermentation bacterium liquid is 25wt% of the heap body, finally forming a bottom width of 2m and a height of 2.5m. Stacks with a top width of 1m. Cover the surface of the pile with Gore film, and supply...

Embodiment 2

[0043] A kind of sludge composting method, concrete steps are as follows:

[0044] S1: Use sludge, mushroom residue and wood as raw materials, and crush the raw materials. The mass ratio of sludge, mushroom residue and wood block is 4:2:2, and the moisture content of sludge is not higher than 55%. After the sludge and wood blocks are mixed evenly, they are mixed with mushroom residues and piled up to control the humidity of the material. The C / N of the material is controlled to be 1:25-30. The temperature of the pile is monitored in real time to keep the temperature of the pile at 55-60°C. between.

[0045] S2: pile up the uniformly mixed material in the Gore membrane, add the compound microbial enzyme fermentation bacterium liquid, the addition of the compound microbial enzyme fermentation bacterium liquid is 30wt% of the heap, finally form a bottom width of 2m, a height of 2.5m, Stacks with a top width of 1m. Cover the surface of the pile with Gore film, and supply oxygen...

Embodiment 3

[0049] A kind of sludge composting method, concrete steps are as follows:

[0050] S1: Use sludge, mushroom residue and wood as raw materials, and crush the raw materials. The mass ratio of sludge, mushroom residue and wood block is 4:2:3, and the moisture content of sludge is not higher than 55%. After the sludge and wood blocks are mixed evenly, they are mixed with mushroom residues and piled up to control the humidity of the material. The C / N of the material is controlled to be 1:25-30. The temperature of the pile is monitored in real time to keep the temperature of the pile at 55-60°C. between.

[0051] S2: pile up the uniformly mixed material in the Gore membrane, add the compound microbial enzyme fermentation bacterium liquid, the addition of the compound microbial enzyme fermentation bacterium liquid is 28wt% of the heap, finally form a bottom width of 2m, a height of 2.5m, Stacks with a top width of 1m. Cover the surface of the pile with Gore film, and supply oxygen...

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Abstract

The invention relates to a sludge composting method and organic fertilizer. The sludge composting method comprises the steps that sludge, mushroom dregs and wood blocks serve as raw materials, and after the sludge, the mushroom dregs and the wood blocks are mixed, pile bodies are formed; the pile bodies are piled in a gore membrane, composite microbial enzyme fermented liquid is added, thus a stack is prepared, the surface of the stack is covered with the gore membrane, and the stack is placed in a ventilation oxygen-supplying environment to be subjected to aerobic fermentation; and after fermentation is conducted for 3-4 weeks, discharging and aging are conducted to obtain a coarse fertilizer product, sterilizing, dehydrating, air pumping for odor removing, drying and sieving are conducted sequentially, and thus the organic fertilizer with the uniform particle size is prepared. The sludge composting method is small in occupied space and easy to popularize, the problem that existing municipal sludge cannot be subjected to efficient harmless treatment and disposal is solved, the sludge composting fermentation rate is effectively increased, the pressure of treating the municipal sludge is effectively reduced, the production efficiency of converting organic solid waste into the organic fertilizer is improved, meanwhile, secondary pollution of traditional incineration or sludge landfill to the environment can be reduced, and good environmental protection significance is achieved.

Description

technical field [0001] The invention relates to the technical field of composting, in particular to a sludge composting method and organic fertilizer. Background technique [0002] In the process of urbanization and development, the amount of sewage treatment has increased, which has also led to a significant increase in the output of sewage treatment subsidiary sludge. How to deal with and dispose of these sludges, make them harmless and make effective use is a problem that the world pays attention to. Municipal sludge refers to the dark brown mud or mud cake with a water content of about 80% that is discharged from the sewage treatment plant after being concentrated and dehydrated. It contains a lot of water, rich organic matter, and nutrients such as nitrogen, phosphorus, and potassium. Elements, random disposal of sludge will cause serious waste of resources and easily form secondary pollution. [0003] Composting is a good method for harmless treatment of sludge, but ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F15/00C05F17/00
CPCY02W30/40
Inventor 陈鑫阳艾利肖美玲文笑
Owner XIAMEN UNIV OF TECH
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