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Method for preparing organic fertilizer from domestic sludge and organic garbage through mixing

A technology for domestic sludge and organic waste, applied in the preparation of organic fertilizers, organic fertilizers, sewage/sludge fertilizers, etc., can solve the problems of unstable environment, complex process, re-pollution, etc., to maintain the soil and water environment and taste good , the effect of reducing pollution

Inactive Publication Date: 2017-02-22
ZHONGCHUANG HONGYUAN BEIJING ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing organic fertilizer by mixing domestic sludge and organic waste, which is used to solve the problems of complex process, high cost, instability and re-pollution to the environment in the existing sludge treatment method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In this embodiment, a method for preparing organic fertilizer by mixing domestic sludge and organic waste includes the following steps.

[0033] Step S1: Use domestic sludge with a water content of 75% as a raw material and mix it with a dehydrating agent once in a mixing bin to perform primary dehydration treatment on domestic sludge, wherein the mass ratio of domestic sludge to dehydrating agent is 3.0: 2. Dehydrating agent refers to the substance that can reduce the moisture in the material or remove the crystal water in the compound molecule. Commonly used dehydrating agents include alcohol, glycerin, polyaluminum chloride and other substances. The dehydrating agent in this embodiment is preferably cationic polypropylene amides.

[0034] The organic matter in the municipal waste is sorted, homogenized and crushed, then added to the mixing bin through the delivery pump, and mixed with domestic sludge and dehydrating agent for the second time. Among them, the sludge ...

Embodiment 2

[0055] In this embodiment, a method for preparing organic fertilizer by mixing domestic sludge and organic waste includes the following steps.

[0056] Step S1: Use domestic sludge with a water content of 60% as a raw material and mix it with a dehydrating agent once in a mixing bin to perform primary dehydration treatment on domestic sludge, wherein the mass ratio of domestic sludge to dehydrating agent is 2.5: 2. The dehydrating agent in this embodiment is cationic polyacrylamide.

[0057] The organic matter in the municipal waste is sorted, homogenized and crushed, then added to the mixing bin through the delivery pump, and mixed with domestic sludge and dehydrating agent for the second time. Among them, the sludge after primary dehydration treatment (that is, domestic sewage The mass ratio of mud and dehydrating agent) to garbage organic matter is 3.2:4.0. After mixing evenly, let the mixed material in the mixing bin stand for 5 hours.

[0058] The mixed material obtaine...

Embodiment 3

[0076] In this embodiment, a method for preparing organic fertilizer by mixing domestic sludge and organic waste includes the following steps.

[0077] Step S1: Use domestic sludge with a water content of 80% as a raw material and mix it with a dehydrating agent once in a mixing bin to perform primary dehydration treatment on domestic sludge, wherein the mass ratio of domestic sludge to dehydrating agent is 2.8: 2. The dehydrating agent in this embodiment is cationic polyacrylamide.

[0078] The organic matter in the municipal waste is sorted, homogenized and crushed, then added to the mixing bin through the delivery pump, and mixed with domestic sludge and dehydrating agent for the second time. Among them, the sludge after primary dehydration treatment (that is, domestic sewage The mass ratio of mud and dehydrating agent) to garbage organic matter is 3.5:4.0. After mixing evenly, let the mixed material in the mixing bin stand for 5.5 hours.

[0079] The mixed material obtai...

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Abstract

The invention discloses a method for preparing organic fertilizer from domestic sludge and organic garbage through mixing. According to the method, the domestic sludge is taken as a main raw material and mixed with organic matter in the garbage, with combination of a microbial starter culture and adoption of the principle of dry type high-temperature anaerobic fermentation, the sludge mixed with the organic matter is subjected to composting, dehydration and deodorization in an anaerobic high-temperature environment, fermentation is finished finally, mixed material fermentation powder is obtained through grinding and sieving, the organic fertilizer is prepared from the mixed material fermentation powder, and the requirements for harmless, stable and recycling sludge treatment are met. The process is simple, energy consumption is low, the problem of sludge treatment is solved, and environmental pollution caused by the organic matter in urban garbage is reduced. The organic fertilizer prepared with the method is stable in nature, and has low heavy metal content and high nutritional value.

Description

technical field [0001] The invention relates to the technical field of domestic sludge treatment, in particular to a method for preparing organic fertilizer by mixing domestic sludge and organic waste. Background technique [0002] The traditional sludge treatment methods and urban solid waste treatment methods in my country or in the world mainly include water system dumping, incineration, landfill and land utilization. Among them, the dumping method of the water system will pollute the water body and destroy the ecological balance in the water; although the incineration method has obvious reductions, it consumes a lot of energy and investment, and the dust generated will pollute the air and is not energy-saving; the landfill method will Cause soil and groundwater pollution; and land use methods, although helpful to soil fertility, but the heavy metals contained in sludge and garbage itself will cause soil pollution, and the parasitic bacteria produced will also affect the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00
CPCC05B7/00C05C9/00C05D1/02C05F7/00C05F9/00C05F11/08C05F17/00
Inventor 袁境
Owner ZHONGCHUANG HONGYUAN BEIJING ENVIRONMENTAL PROTECTION TECH CO LTD
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