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Method for treating sludge in large scale by utilizing earthworm

A sludge and earthworm technology is applied in the field of large-scale sludge treatment using earthworms. Simple to use effects

Inactive Publication Date: 2011-04-20
JILIN LVHUAN ORGANIC SOLID WASTES BIOLOGICAL TREATMENT TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of environmental risks, incineration and landfills have risks of tail gas and groundwater pollution respectively.
The risk of direct land use of sludge also needs to be controlled. Although sludge without special treatment contains some organic matter, the heavy metals, pathogenic bacteria and other long-lasting organic pollutants contained in it will cause harm to the soil and affect the quality of crops. severely affected
The random application of sludge fertilizer in some places has caused problems such as land salt damage, burning seedlings, pests and diseases, etc.

Method used

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  • Method for treating sludge in large scale by utilizing earthworm
  • Method for treating sludge in large scale by utilizing earthworm
  • Method for treating sludge in large scale by utilizing earthworm

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Experimental program
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Embodiment Construction

[0041] refer to figure 1 , the inventive method comprises:

[0042] 1. Laying and cultivation of soil microbial cultivation bed;

[0043] Breeding conditions:

[0044] 1. Cultivation substrate selection: fresh manure from dairy cows or fattening cattle;

[0045] 2. Requirements for the size of the cultivation bed: 1m wide, 25cm high, and unlimited length;

[0046] Note: The width of the cultivation bed is the recommended production size, and it is not necessary and must be followed as one of the conditions for cultivating soil microorganisms.

[0047] 3. Temperature and humidity indicators during the cultivation process: the humidity of the cultivation bed is 60%, and the temperature of the cultivation bed is 20°C;

[0048] 4. Site selection: the ambient temperature is 15°C;

[0049] 5. Operation method: On the basis of meeting the above conditions, cover the cultivation bed with straw curtains with a thickness of 5 cm. After 72 hours, the required soil microorganisms - n...

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Abstract

The invention relates to a method for treating sludge in large scale by utilizing earthworm, including three stages of cultivation of soil micro organisms, cultivation of specific organism seed applicable to sludge treatment and sludge treatment by utilizing the specific organism seed. The method for treating municipal domestic sewage treatment plant sludge in large scale by utilizing earthworm of the invention has the advantages of low investment, simple operation and wide region applicability, the volume of sludge through the treatment of the invention can be reduced to one sixth of the original volume, and product after treatment (earthworm excretion) has stable physical and chemical properties, accords with organic fertilizer application standard, can be widely applied in the fields of soil improvement (such as saline-alkali soil reformation), urban landscaping, animals and plants cultivation and the like, can obtain respectable economic benefit and can realize resource recycling.Thus, the method is feasible in application of sludge treatment and can realize harmlessness, reduction and recycling of sludge treatment.

Description

technical field [0001] The invention relates to a sludge treatment method, in particular to a method for using earthworms to treat sludge on a large scale. Background technique [0002] The problem of urban sludge is accompanied by the process of urbanization in the world. At present, the total annual sludge production in my country reaches 9 million tons, while the standardized disposal rate of sludge in sewage treatment plants is less than 20%. The problem of sludge treatment and disposal has become a bottleneck problem restricting the healthy development of the entire sewage treatment industry, and it has also been paid more and more attention by governments at all levels. [0003] At present, various countries have adopted different treatment methods for sludge, mainly including reclamation, landfill, incineration and land use. Among them, reclamation has been banned by the international law of the sea due to serious pollution problems. The above abolished, the remainin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/02
Inventor 王文东周宗忠
Owner JILIN LVHUAN ORGANIC SOLID WASTES BIOLOGICAL TREATMENT TECH
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