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Preparation method of activated sludge spray-type fertilizer

A technology of activated sludge and fertilizer, applied in fertilizer mixture, fertilization device, application, etc., can solve problems such as poor effect, and achieve the effect of reducing cost, enhancing disease resistance, and reducing the amount of pesticide application

Inactive Publication Date: 2015-06-24
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activated sludge is directly used as farmland fertilizer after dehydration, which also contains a lot of harmful substances, and the effect is poor when used directly as fertilizer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A kind of preparation method of activated sludge spraying type fertilizer of the present invention comprises the following steps:

[0016] (1) Mix activated sludge and water at a weight ratio of 1:100 and pass through a 20-mesh sieve to obtain a suspension;

[0017] (2) Add iron sulfate 150-200r / min to the sieved suspension and stir for 5 hours, centrifuge, discard the filtrate, and keep the solid mixture;

[0018] (3) Add the solid mixture obtained in step (2) into water, use 20kHz ultrasonic to crush the sludge cells, and take the clear liquid after centrifugation;

[0019] (4) Add ε-polylysine, ascorbic acid, ammonium molybdate, methylene succinic acid, and hexanoate and stir evenly to obtain activated sludge spraying fertilizer.

[0020] The components by mass ratio are: 100 parts of activated sludge, 4 parts of ferric sulfate, 6 parts of ε-polylysine, 4 parts of ascorbic acid, 2 parts of ammonium molybdate, 3 parts of methylene succinic acid, and 4 parts of diethy...

Embodiment 2

[0022] A kind of preparation method of activated sludge spraying type fertilizer of the present invention comprises the following steps:

[0023] (1) Mix activated sludge and water at a weight ratio of 1:100 and pass through a 20-mesh sieve to obtain a suspension;

[0024] (2) Add iron sulfate 150-200r / min to the sieved suspension and stir for 5 hours, centrifuge, discard the filtrate, and keep the solid mixture;

[0025] (3) Add the solid mixture obtained in step (2) into water, use 30kHz ultrasonic to crush the sludge cells, and take the clear liquid after centrifugation;

[0026] (4) Add ε-polylysine, ascorbic acid, ammonium molybdate, methylene succinic acid, and hexanoate and stir evenly to obtain activated sludge spraying fertilizer.

[0027] The components by mass ratio are: 100 parts of activated sludge, 5 parts of ferric sulfate, 8 parts of ε-polylysine, 5 parts of ascorbic acid, 3 parts of ammonium molybdate, 4 parts of methylene succinic acid, and 5 parts of diethy...

Embodiment 3

[0029] A kind of preparation method of activated sludge spraying type fertilizer of the present invention comprises the following steps:

[0030] (1) Mix activated sludge and water at a weight ratio of 1:100 and pass through a 20-mesh sieve to obtain a suspension;

[0031] (2) Add iron sulfate 150-200r / min to the sieved suspension and stir for 5 hours, centrifuge, discard the filtrate, and keep the solid mixture;

[0032] (3) Add the solid mixture obtained in step (2) into water, use 25kHz ultrasonic to crush the sludge cells, and take the clear liquid after centrifugation;

[0033] (4) Add ε-polylysine, ascorbic acid, ammonium molybdate, methylene succinic acid, and hexanoate and stir evenly to obtain activated sludge spraying fertilizer.

[0034] The components by mass ratio are: 100 parts of activated sludge, 3 parts of iron sulfate, 5 parts of ε-polylysine, 3 parts of ascorbic acid, 1 part of ammonium molybdate, 1 part of methylene succinic acid, and 2 parts of diethylhex...

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PUM

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Abstract

The invention discloses a preparation method of activated sludge spray-type fertilizer. The preparation method comprises the following steps: mixing the activated sludge with water, and sieving with a 20-mesh sieve to obtain a suspension; adding ferric sulfate, stirring at a speed of 150-200r / min, performing centrifugal separation, adding water into a solid mixture, crushing sludge cells by using ultrasonic, performing centrifugal separation, and taking supernatant; and adding epsilon-polylysine, ascorbic acid, ammonium molybdate, methylene succinic acid and diethyl aminoethyl hexanoate, and uniformly stirring to obtain the activated sludge spray-type fertilizer. According to the fertilizer prepared through adopting the method, toxic components are effectively removed from the activated sludge, and polysaccharides, proteins, trace elements, a variety of minerals and other nutrients are extracted from the sludge; and by matching with other components, the activated sludge spray-type fertilizer can regulate the balance of plant nutrients, enhance the disease resistance of plants and has the effect of inhibiting harmful bacteria.

Description

technical field [0001] The invention relates to the technical field of spraying fertilizers, in particular to a preparation method of activated sludge spraying fertilizers. Background technique [0002] The residual sludge of sewage treatment plants mainly contains microorganisms, organic matter adsorbed by microorganisms and products of microbial metabolic activities, as well as a large amount of polysaccharides, proteins, and cellulose substances. The activated sludge is directly used as farmland fertilizer after dehydration, which also contains many harmful substances, and the effect is poor when used directly as fertilizer. How to process activated sludge into high-efficiency organic fertilizers that can be directly put into use is a problem that needs to be solved now. In recent years, the application of nitrogen and phosphorus fertilizers has increased year by year, the relative decrease of organic fertilizers, the lack of various nutrients has become increasingly ser...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00
Inventor 郭晓斐于春光牛林
Owner SHANDONG JIANZHU UNIV
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