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Preparation method of organic fertilizer taking activated sludge as raw material

A technology of activated sludge and organic fertilizer, applied in the direction of organic fertilizer, sewage/sludge fertilizer, inorganic fertilizer, etc., to achieve the effect of increasing organic matter, strong resistance resistance, and significant effect of increasing production

Inactive Publication Date: 2021-04-30
HEBEI UNIV OF ENVIRONMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is no complete treatment method for excess sludge at home and abroad, and most methods are only in the initial stage of stabilization and reduction. However, the final disposal method of sludge is to realize the harmless treatment and resource utilization

Method used

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  • Preparation method of organic fertilizer taking activated sludge as raw material
  • Preparation method of organic fertilizer taking activated sludge as raw material

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preparation example Construction

[0027] In one embodiment, the preparation method of the fermentation broth in step 1) comprises the following steps: making Bacillus licheniformis, Bacillus subtilis, Bacillus megaterium, Bacillus jelly-like, Lactobacillus acidophilus, phospholytic solution The slanted seeds of Bacillus megaterium and Bacillus thuringiensis were respectively inoculated into the seed culture medium, and cultivated for 12-24 hours at a temperature of 30-35°C and a rotation speed of 100-150r / min to obtain a seed liquid; the seed liquid Inoculate them into the liquid fermentation medium respectively, cultivate them for 24-36 hours at a temperature of 30-35°C and a rotational speed of 100-150r / min to obtain a fermentation broth, and mix the fermentation broths of different strains, Obtain the compound fermentation broth.

[0028] In one embodiment, the compound fermentation broth in the step 1) includes the following fermentation broth in parts by weight: 10-15 parts of Bacillus licheniformis ferme...

Embodiment 1

[0035] A kind of preparation method of the organic fertilizer that takes activated sludge as raw material is as follows:

[0036] 1) Weigh the following raw materials in proportion: 40 parts of activated sludge, 10 parts of molasses, 20 parts of bran shells, 30 parts of water, 5 parts of fermented bacteria liquid, 20 parts of humus soil, and 1 part of trace elements;

[0037] 2) Pulverizing the chaff and passing through an 80-mesh sieve to obtain chaff powder;

[0038] 3) Mix and stir the raw materials described in step 1) and the bran hull powder obtained in step 2) in proportion, the water content of the mixture is 35%, and form the mixture into a mixture pile with a width of 1m and a height of 1m. Fermentation, after fermentation to a temperature of 90°C, turn over and continue fermentation, repeat 3 times;

[0039] 4) Crushing and sieving the organic fertilizer after the fermentation is completed to obtain a finished organic fertilizer.

[0040] The preparation method of...

Embodiment 2

[0045] Same as Example 1, the difference is that the raw material is composed of the following components by weight: 60 parts of activated sludge, 15 parts of molasses, 25 parts of chaff, 45 parts of water, 8 parts of fermented bacteria liquid, 25 parts of humus, 5 parts of trace elements.

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Abstract

The invention provides a preparation method of an organic fertilizer taking activated sludge as a raw material. The preparation method comprises the following steps: 1) weighing the following raw materials in parts by weight: 40-60 parts of activated sludge, 10-15 parts of molasses, 30-45 parts of water, 5-8 parts of zymophyte liquid, 20-25 parts of humus soil and 1-5 parts of trace elements; 2) crushing and sieving the bran husks to obtain bran husk powder; (3) uniformly mixing and stirring the raw materials in the step (1) and the bran husk powder obtained in the step (2) in proportion, stacking the mixture into a mixture pile with the width of 11.5 m and the height of 0.81 m, fermenting until the central temperature is 90-95 DEG C, turning over the pile, continuously fermenting, and repeating for 2-3 times; 4) crushing and screening the fermented organic fertilizer to obtain the finished product organic fertilizer. According to the method, harmful ingredients in the activated sludge can be eliminated, meanwhile, the prepared organic fertilizer can significantly improve the crop yield while fertilizing soil, and the good economic value and industrial production prospects are achieved.

Description

technical field [0001] The invention relates to the technical field of organic fertilizers, in particular to a method for preparing organic fertilizers using activated sludge as a raw material. Background technique [0002] Activated sludge method is a widely used sewage treatment technology at present. This method can effectively treat sewage and make it meet the discharge standard. However, a large amount of residual sludge will be generated while using this method to treat sewage. The main components of the remaining activated sludge are flocculent organisms, which contain a lot of water, rich organic matter and nutrients such as nitrogen, phosphorus and potassium, and also have a high calorific value, so it can be used as a high-quality "secondary sludge" resource". However, it also enriches a large amount of heavy metal ions and a small amount of harmful solid substances such as pathogenic microorganisms and parasite eggs, which limits the utilization of remaining acti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/80C05F17/20
CPCC05G3/80C05C3/00C05F17/20C05D3/00C05D5/00C05D9/02C05F5/00C05F5/002C05F7/00C05F11/02C05F11/08Y02W30/40
Inventor 何鑫耿世刚张庆瑞宋瑜吴昊张颖超杜洁刘佳莉
Owner HEBEI UNIV OF ENVIRONMENTAL ENG
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