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Method for producing gamma-polyglutamic acid organic fertilizer by utilizing sludge

A technology for polyglutamic acid and organic fertilizer, which is applied in the field of producing γ-polyglutamic acid organic fertilizer, can solve the problems of difficulty in popularization and application, high price, and high production cost of γ-polyglutamic acid organic fertilizer, and can reduce production Cost, low production cost, effect of reducing water and nutrient loss

Active Publication Date: 2017-10-10
CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the preparation of γ-polyglutamic acid organic fertilizer is mainly to add finished γ-polyglutamic acid to composted fermented organic fertilizer. Due to the high price of finished γ-polyglutamic acid, the method prepared The production cost of γ-polyglutamic acid organic fertilizer is relatively high, which makes popularization and application difficult

Method used

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  • Method for producing gamma-polyglutamic acid organic fertilizer by utilizing sludge
  • Method for producing gamma-polyglutamic acid organic fertilizer by utilizing sludge
  • Method for producing gamma-polyglutamic acid organic fertilizer by utilizing sludge

Examples

Experimental program
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Effect test

Embodiment 1

[0041] 1), the raw materials are put into the mixer according to the following mass percentages: 64% of heavy metal-removed dewatered sludge, 20% of straw, 10% of pig manure, and 5% of medical stone, so that the carbon-nitrogen molar ratio in the matrix is ​​20: 1~25:1, wherein the moisture content of the heavy metal dewatered sludge is 75~80%.

[0042] 2) Dilute and activate the 0.5% biological fermentation agent in an appropriate amount of water.

[0043] 3) Sprinkle the activated bio-fermentation agent on the mixed material obtained in step 1), spray tap water therein to adjust the moisture content to 50-65%, mix again and move it to the tank fermentation bed for composting Ripe. Keep feeding air into the trough-type pipeline every day. After 2 days of composting, the temperature of the compost body reaches above 40°C. At this time, the compost body is turned over every 2 days. After 25 days, the organic fertilizer is fully decomposed to obtain bio-organic fertilizer.

[...

Embodiment 2

[0047] 1), the raw materials are put into the mixer according to the following mass percentages: 55% of heavy metal-removed dewatered sludge, 30% of straw, 10% of pig manure, and 4% of medical stone, so that the carbon-nitrogen molar ratio in the matrix is ​​20: 1~25:1.

[0048] 2) Dilute and activate the biological fermentation agent with a mass percentage of 1% in an appropriate amount of water.

[0049] 3) Sprinkle the activated bio-fermentation agent on the mixed material obtained in step 1), spray tap water therein to adjust the moisture content to 50-65%, mix again and move it to the tank fermentation bed for composting Ripe. Keep feeding air into the trough pipeline every day. After 2 days of composting, the temperature of the compost body reaches above 40°C. At this time, the compost body is turned over every 2 days. After 28 days, the organic fertilizer is fully decomposed to obtain bio-organic fertilizer.

[0050] 4) Add 9% monosodium glutamate meal (with a glutami...

Embodiment 3

[0053] Preparation of biological leavening agent:

[0054] 1), preparation medium:

[0055] a. Beef extract peptone solid slant medium: the formula is 3g beef extract, 10g peptone, 5g NaCl, 20g agar, add water to 1000mL, pH 7.0-7.4;

[0056] b. Beef extract-peptone liquid medium: its formula is 3g of beef extract, 10g of peptone, 5g of NaCl, supplemented with water to 1000mL, pH 7.0-7.4.

[0057] 2), activation, cultivation:

[0058] Sterilize the beef extract peptone solid slant medium at 121°C for 30 minutes, then insert Bacillus amyloliquefaciens JX-6 into the solid slant medium, and activate it at 30-37°C for 36 hours; sterilize the beef extract peptone liquid medium After being sterilized at 121°C for 30 minutes, the activated Bacillus amyloliquefaciens JX-6 was inserted into the liquid medium, shaken and cultivated at 35°C and 150 r / min for 24 hours to prepare a biological fermentation agent.

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Abstract

The invention belongs to the field of agricultural fertilizer preparation and aims to provide a method for producing a gamma-polyglutamic acid organic fertilizer by utilizing sludge. According to the technical scheme, the method comprises the following steps: putting 50-70% of dewatered sludge without heavy metal, 25-40% of agricultural waste auxiliary materials and 4-8% of medical stone in weight percent into a mixer for uniformly mixing; adding 0.1-1% of activated biological fermenting agent into a mixture, composting to obtain a bio-organic fertilizer; adding 5-10% of aginomoto meal into the bio-organic fertilizer, fully and uniformly mixing and then leveling and performing aerobic fermentation, drying the fermentation product, pelletizing and bagging, thereby obtaining the organic fertilizer. The method provided by the invention is low in production cost and is beneficial to environmental protection; the prepared gamma-polyglutamic acid organic fertilizer contains balanced nutrition, is capable of purifying soil and can increase the ratio of water and fertilizer used by the crops; the preparation technology is simple, safe and environment-friendly and has excellent application prospect.

Description

technical field [0001] The invention belongs to the field of agricultural fertilizer preparation, in particular to a method for producing gamma-polyglutamic acid organic fertilizer from sludge. Background technique [0002] With the development of society and the continuous improvement of people's living standards, urban sewage treatment plants are becoming more and more popular, and the amount of biological sludge produced is also increasing. The amount of sludge (dry weight) discharged by sewage treatment plants in my country is about 2 million tons per year. And grow at a rate of more than 10% per year. The best way to treat sludge is to use aerobic composting, stacking incineration, dry landfill and other processes for harmless, reduction and stabilization treatment. But in fact, only 20% of the sludge has been harmlessly treated and stabilized, 10% of the sludge is directly used in farmland, 20% of the sludge is landfilled, and 50% of the sludge is not treated. Arbitra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20C05G3/04C12P13/02C12R1/07C05G3/80
CPCC05C11/00C12N1/20C12P13/02C05G3/80C12N1/205C12R2001/07C05D9/00C05F3/00C05F5/008C05F7/00C05F11/00C05F11/08
Inventor 闫志英姬高升许力山房俊楠刘晓风
Owner CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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