Method for preparing organic fertilizer by virtue of sludge

A technology of organic fertilizer and sludge, which is applied in the field of using sludge to prepare organic fertilizer, can solve the problems of high treatment cost, environmental pollution, and high cost, and achieve the effects of reducing pollution, improving soil ecological environment, and improving fertilizer efficiency

Inactive Publication Date: 2016-08-10
张能力
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the sludge treatment methods in my country are incineration, drying or sanitary landfill. These are either too expensive to deal with, or cause pollution to the environment, which is not suitable for the current international development.
In recent year

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of method utilizing sludge to prepare organic fertilizer, concrete steps are as follows:

[0021] (1) Prepare 100 parts of municipal domestic sludge, add water according to the mass ratio of water and municipal domestic sludge 1.5: 1, add industrial grade according to the mass ratio of 95% industrial grade acetic acid and residual sludge 0.03: 1 Acetic acid, after stirring evenly, make sludge slurry;

[0022] (2) Heating the sludge slurry to 40° C., stirring for 50 in during the heating process, mechanically filtering the heated sludge slurry and washing with water to obtain a mud cake;

[0023] (3) Add 40 parts of cow dung, 10 parts of straw powder, 10 parts of wax gourd skin, 8 parts of sea asparagus powder and 3 parts of quicklime powder to the mud cake, mix and stir for 3 hours to obtain the mixture A;

[0024] (4) Mix 10% of mixed material A with 10 parts of sugar beet meal, then add 30 parts of water-absorbing material, mix evenly to obtain mixed material ...

Embodiment 2

[0029] A kind of method utilizing sludge to prepare organic fertilizer, concrete steps are as follows:

[0030] (1) Prepare 150 parts of municipal domestic sludge, add water according to the mass ratio of water and municipal domestic sludge 2: 1, add industrial grade according to the mass ratio of 96% industrial grade acetic acid and residual sludge 0.04: 1 Acetic acid, after stirring evenly, make sludge slurry;

[0031] (2) Heating the sludge slurry to 45° C., stirring for 55 minutes during the heating process, mechanically filtering the heated sludge slurry and washing with water to obtain a mud cake;

[0032] (3) Add 45 parts of cow dung, 12 parts of straw powder, 12 parts of wax gourd skin, 9 parts of sea asparagus powder and 3.5 parts of quicklime powder to the mud cake, mix and stir for 3.5 hours to obtain a mixture A;

[0033] (4) Mix 12% of mixed material A with 12 parts of sugar beet meal, then add 32 parts of water-absorbing material, mix well to obtain mixed materi...

Embodiment 3

[0038] A kind of method utilizing sludge to prepare organic fertilizer, concrete steps are as follows:

[0039] (1) Prepare 200 parts of municipal domestic sludge, add water according to the mass ratio of water and municipal domestic sludge 2.5: 1, add industrial grade according to the mass ratio of 96% industrial grade acetic acid and residual sludge 0.05: 1 Acetic acid, after stirring evenly, make sludge slurry;

[0040] (2) Heating the sludge slurry to 50° C., stirring for 60 minutes during the heating process, mechanically filtering the heated sludge slurry and washing with water to obtain a mud cake;

[0041] (3) Add 50 parts of cow dung, 15 parts of straw powder, 15 parts of wax gourd skin, 10 parts of sea asparagus powder and 4 parts of quicklime powder to the mud cake, mix and stir for 4 hours to obtain a mixture A;

[0042] (4) Mix 15% of mixed material A with 15 parts of sugar beet meal, then add 35 parts of water-absorbing material, mix well to obtain mixed materia...

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PUM

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Abstract

The invention discloses a method for preparing an organic fertilizer by virtue of sludge. The method specifically comprises the following steps: preparing sewage sludge from municipal domestic sludge; heating the sewage sludge, and performing mechanical filtration and washing to obtain a sludge cake; adding cow dung, straw powder, Chinese wax gourd peel powder, sea asparagus powder and quicklime powder into the sludge cake to obtain a mixed material A; preparing a return product; performing fermentation; after-ripening a compost to obtain a powdery fermented material; adding weathered coal, urea, monoammonium phosphate, potassium sulfate, ferrous sulfate, magnesium sulfate, zinc sulfate, manganese sulfate and borax to obtain an organic fertilizer finished product. According to the method, environmental pollution is reduced, and energy resources are saved; beet pulp contains a large amount of water-soluble organic matters, and can be directly used for regulating a water-soluble carbon-nitrogen ratio, so that the fertilizer efficiency of a compost product is greatly improved, and the market competitiveness of the product is enhanced; the organic fertilizer contains multiple nutrient elements and active substances required by growth of crops, so that the fertilizer efficiency is persistent, the water retention, fertilizer retention and ventilation capability of soil can be enhanced, and the ecological environment of the soil can be improved.

Description

technical field [0001] The invention relates to the technical field of sludge utilization, in particular to a method for preparing organic fertilizer from sludge. Background technique [0002] As we all know, urban domestic sludge refers to the solid waste produced by the treatment of domestic sewage, with a moisture content of about 80%. Domestic sludge usually contains various microorganisms and flocs composed of organic and inorganic particles, and contains a large amount of toxic and harmful substances. Such as parasite eggs, pathogenic microorganisms, bacteria, synthetic organic matter and heavy metal ions, etc.; at the same time, the sludge also contains nitrogen, phosphorus, potassium required for plant growth and development, and various trace elements to maintain the normal growth and development of plants and can improve soil structure. of organic matter. At present, most of the sludge treatment methods in our country are incineration, drying or sanitary landfill....

Claims

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Application Information

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IPC IPC(8): C05G3/04C05F17/00C05G3/80
CPCC05B7/00C05D3/02C05F9/04C05F17/50C05G3/80C05C9/00C05D1/02C05D5/00C05D9/00C05D9/02C05F11/02C05F3/00C05F5/002C05F5/006C05F7/00C05F11/00C05F11/08Y02W30/40
Inventor 张能力
Owner 张能力
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