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Organic fertilizer prepared from activated sludge, and preparation method and application thereof

A technology of activated sludge and organic fertilizer, applied in the agricultural field, can solve problems such as heavy metal ion enrichment

Inactive Publication Date: 2019-05-24
WUXI LUHUA FERTILIZER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there is still the enrichment of heavy metal ions

Method used

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  • Organic fertilizer prepared from activated sludge, and preparation method and application thereof
  • Organic fertilizer prepared from activated sludge, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0051] This embodiment provides a kind of preparation method of the organic fertilizer that activated sludge prepares, and described preparation method comprises the following steps:

[0052] (1) Mix straw, bamboo, and blue-green algae according to the mass ratio of 3:7:1, and heat for 70 minutes under anaerobic conditions, the heating temperature is 220°C, and the pretreatment mixture is obtained after cooling to 25°C;

[0053] (2) The activated sludge with a water content of 70% is mixed with the pretreatment mixture obtained in step (1) according to a mass ratio of 5:1, and then heated for 45 minutes under anaerobic and vacuum conditions, and the heating temperature is 135 ° C. After cooling to 25°C, mixed sludge is obtained;

[0054] (3) mixing step (2) gained mixed sludge and nutrient solution, nutrient solution is 7wt.% of described mixed sludge, composting treatment 30d, every 6d turns over once, obtains the sludge after composting, and described nutrient solution is ma...

Embodiment 2

[0057] This embodiment provides a kind of preparation method of the organic fertilizer that activated sludge prepares, and described preparation method comprises the following steps:

[0058] (1) Mix straw, bamboo, and blue-green algae according to the mass ratio of 5:12:2, and heat for 65 minutes under anaerobic conditions, the heating temperature is 230°C, and the pretreatment mixture is obtained after cooling to 27°C;

[0059] (2) The activated sludge with a water content of 65% is mixed with the pretreatment mixture obtained in step (1) according to a mass ratio of 4:1, and then heated for 50 minutes under anaerobic and vacuum conditions, and the heating temperature is 130 ° C. After cooling to 24°C, mixed sludge is obtained;

[0060] (3) mixing step (2) gained mixed sludge and nutrient solution, nutrient solution is 8wt.% of described mixed sludge, composting treatment 27d, every 5d stirs once, obtains the sludge after composting, and described nutrient solution is made f...

Embodiment 3

[0063] This embodiment provides a kind of preparation method of the organic fertilizer that activated sludge prepares, and described preparation method comprises the following steps:

[0064] (1) Mix straw, bamboo, and blue-green algae according to the mass ratio of 7:15:4, and heat for 75 minutes under anaerobic conditions. The heating temperature is 210°C, and the pretreatment mixture is obtained after cooling to 24°C;

[0065] (2) The activated sludge with a water content of 75% is mixed with the pretreatment mixture obtained in step (1) according to a mass ratio of 6:1, and then heated for 40 minutes under anaerobic and vacuum conditions, and the heating temperature is 140 ° C. After cooling to 27°C, mixed sludge is obtained;

[0066] (3) mixing step (2) gained mixed sludge and nutrient solution, nutrient solution is 6wt.% of described mixed sludge, composting treatment 32d, every 7d stirs once, obtains the sludge after composting, and described nutrient solution is made f...

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Abstract

The invention belongs to the technical field of agriculture, and relates to organic fertilizer prepared from activated sludge, and a preparation method and application thereof. The preparation methodincludes the steps of mixing straw with bamboos and cyanobacteria, heating the mixture under anaerobic conditions, and cooling the mixture to obtain the pretreated mixture; mixing the activated sludgewith the obtained pretreated mixture, heating the two under anaerobic vacuum conditions, and cooling down to obtain the mixed sludge; mixing the obtained mixed sludge with a culture solution, and performing composting to obtain the composted sludge, wherein the culture solution is prepared from sterile water, lactic acid bacteria, saccharomycetes and thiobacillus ferrooxidans; mixing the composted sludge with brucite fibers and calcium carbonate powder, and performing pelletizing and drying to obtain the organic fertilizer. The preparation method has the advantages that the activated sludge can be fully utilized, can fully absorb active ingredients released by the straw, the cyanobacteria and the bamboos, and can have the effect of slowly releasing the fertilizer effect.

Description

technical field [0001] The invention belongs to the technical field of agriculture, and relates to a method for preparing an organic fertilizer, in particular to an organic fertilizer prepared by using activated sludge, a preparation method and an application thereof. Background technique [0002] With the operation of large and medium-sized sewage treatment plants, the sewage treatment rate continues to increase, but the sludge output also increases rapidly. When the sewage treatment capacity of the activated sludge in the sewage treatment plant decreases, the utilization value of the remaining activated sludge decreases, but The remaining activated sludge still contains a large number of microorganisms, organic matter adsorbed by microorganisms, microbial metabolites, polysaccharides, proteins, and cellulose. The use of these activated sludge as fertilizer can meet the needs of plants for nutrients. [0003] CN 1354158 A discloses a method for producing bio-organic compou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
Inventor 丁路
Owner WUXI LUHUA FERTILIZER TECH
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