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Improvement method of sludge compost

A sludge and composting technology, applied in the direction of sewage/sludge fertilizer, nitrogen fertilizer, organic fertilizer, etc., can solve the problems of high soluble salt concentration and high heavy metal content in sludge composting, so as to avoid secondary pollution, reduce the breeding of mosquitoes and flies, Simple operation effect

Inactive Publication Date: 2017-05-31
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an improved method for composting sludge, which solves the technical problems of high heavy metal content and high concentration of soluble salts in sludge composting in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The improvement method of present embodiment sludge composting comprises the following methods:

[0026] S1. Weigh 100 parts of sludge, 15 parts of zeolite powder, 20 parts of urea, 15 parts of aluminum oxide, 10 parts of earthworm excrement, 20 parts of fly ash, 15 parts of activated carbon, 20 parts of modifier, and 20 parts of fermentation bacteria;

[0027] S2, adding 50% of the total mass of fermenting bacteria weighed in step S1 to the sludge for preliminary fermentation, reducing the water content to 60%, to obtain fermented sludge;

[0028] S3. Add zeolite powder, urea, aluminum oxide, earthworm excrement, fly ash, activated carbon, modifier and fermentation bacteria to the fermented sludge prepared in step S2, and stir evenly to obtain a mixed material;

[0029] S4. Put the mixed material into the fermentation equipment and carry out composting and fermentation treatment on the mixed material through the combination of static forced ventilation and manual force...

Embodiment 2

[0031] The improvement method of present embodiment sludge composting comprises the following methods:

[0032] S1. Weigh 150 parts of sludge, 25 parts of zeolite powder, 30 parts of urea, 30 parts of aluminum oxide, 18 parts of earthworm excrement, 30 parts of fly ash, 30 parts of activated carbon, 30 parts of modifier, and 30 parts of fermentation bacteria;

[0033] S2, adding 50% of the total mass of fermented bacteria weighed in step S1 to the sludge for preliminary fermentation, reducing the water content to 70%, to obtain fermented sludge;

[0034] S3. Add zeolite powder, urea, aluminum oxide, earthworm excrement, fly ash, activated carbon, modifier and fermentation bacteria to the fermented sludge prepared in step S2, and stir evenly to obtain a mixed material;

[0035] S4. Put the mixed material into the fermentation equipment and carry out composting and fermentation treatment on the mixed material through the combination of static forced ventilation and manual forced...

Embodiment 3

[0038] The improvement method of present embodiment sludge composting comprises the following methods:

[0039] S1. Weigh 125 parts of sludge, 20 parts of zeolite powder, 25 parts of urea, 23 parts of aluminum oxide, 14 parts of earthworm excrement, 25 parts of fly ash, 22 parts of activated carbon, 25 parts of modifier, and 25 parts of fermentation bacteria;

[0040] S2, adding 50% of the total mass of fermented bacteria weighed in step S1 to the sludge for preliminary fermentation, reducing the water content to 65%, to obtain fermented sludge;

[0041] S3. Add zeolite powder, urea, aluminum oxide, earthworm excrement, fly ash, activated carbon, modifier and fermentation bacteria to the fermented sludge prepared in step S2, and stir evenly to obtain a mixed material;

[0042] S4. Put the mixed material into the fermentation equipment and carry out composting and fermentation treatment on the mixed material through the combination of static forced ventilation and manual forced...

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Abstract

The invention provides an improvement method of sludge compost, and relates to the technical field of sludge treatment. The improvement method comprises the following steps: mixing sludge with zymophyte for fermentation; adding zeolite powder, urea, aluminum oxide, earthworm feces, coal ash, activated carbon, an improver and zymophyte and uniformly mixing, so as to obtain a mixed material; and placing the mixed material into fermentation equipment for fermentation, composting for one time for every 7-9 days, fermenting for 30-45 days and discharging. The sludge compost prepared by the method provided by the invention can be widely applied in agriculture, garden greens and roof greening, so that full utilization of sludge resources and environmental protection are facilitated, the waste of plant nutrients such as organic matters, nitrogen and phosphorus contained in sludge is avoided, and the secondary pollution to the environment is also avoided.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to an improvement method for sludge composting. Background technique [0002] A large amount of sludge is produced in the process of municipal and industrial sewage treatment, and the sludge contains a large amount of organic matter, nitrogen and phosphorus and other plant nutrients. At present, sludge disposal methods include: landfill, incineration, throwing into the sea, and making construction materials, etc. The agricultural use of sludge is undoubtedly one of the best disposal methods to turn harm into benefit and avoid secondary pollution, but there are also sludge in sludge. Contain harmful substances such as pathogens, parasite eggs, heavy metals and organic pollutants. If it is directly applied to the agriculture and forestry industry without treatment, it is likely to cause secondary pollution to the environment. [0003] Composting is a microbiological proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00
CPCC05C9/00C05D9/00C05F3/00C05F7/00C05F11/08C05F17/80C05F5/002C05F11/00C05F11/02
Inventor 徐家威吕文洲莫国建廖晓燕
Owner NINGBO UNIV
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