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A kind of method for processing sludge fermentation to produce bio-organic fertilizer

A bio-organic fertilizer and organic fertilizer technology is applied in the preparation of organic fertilizers, the treatment of bio-organic parts, organic fertilizers, etc., which can solve the problems of environmental secondary pollution and waste of organic fertilizer resources, and achieve low operating costs and low floor space. Small, small investment effect

Inactive Publication Date: 2011-11-30
YANTAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the purpose of the present invention is to disclose a method for rapid fermentation of sludge to produce high-efficiency bio-organic fertilizer. The raw materials used in the method have a wide range of sources, simple process equipment, low cost, convenient operation, short fermentation time, and high fermentation efficiency. The final sludge can be used to produce organic fertilizers, which solves the technical problems of secondary environmental pollution and waste of a large amount of organic fertilizer resources in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: A method for processing sludge fermentation to produce bio-organic fertilizer, the steps are as follows:

[0029] 1), at room temperature, prepare the fermentation medium with the urban sewage treatment plant sludge and auxiliary materials with a water content of 70% in a weight ratio of 1:1; make the C / N ratio of the fermentation pile reach the level of 20:1 (analyze and determine the fermentation medium first). The total C and total N content of the heap, and then by adding soluble carbon sources such as brown sugar and soluble nitrogen sources such as urea to regulate the C / N ratio of the fermentation heap to meet the nutrients required for the normal growth and reproduction of microorganisms), the moisture content is 40wt% , the amount by weight of the conditioner, expansion agent and heavy metal deactivator is 12.5:14.5:4.5.

[0030] 2), then add 0.3% by weight of the fermented strain preparation and fully stir to form high-temperature compost, keeping ...

Embodiment 2

[0034] Example 2: A method for processing sludge fermentation to produce bio-organic fertilizer, the steps are as follows:

[0035] 1) Prepare fermentation medium with sludge and auxiliary materials at a weight ratio of 0.5:2.5 at normal temperature; control the C / N ratio of the fermentation medium to 35:1, and the water content is 65wt%. The difference from Example 1 is that the weight ratio of conditioning agent, expansion agent and heavy metal deactivator is 15.5:18.5:3.8.

[0036] 2), then add the fermented strains that account for 0.8% by weight of the fermentation medium, fully stir to form high-temperature compost, and keep the relative humidity at 80%;

[0037] 3) Put the high-temperature compost material into a ventilated and rain-proof environment for strip-type high-temperature composting, control the temperature at 75°C, continue fermentation for 7 days, control the water content at 45%, and make the primary material of organic fertilizer;

[0038] 4) Remove the...

Embodiment 3

[0040] Example 3: A method for processing sludge fermentation to produce bio-organic fertilizer, the steps are as follows:

[0041] 1) The sludge and auxiliary materials are prepared with a fermentation medium in a weight ratio of 2:0.3; the C / N ratio of the fermentation medium is controlled to reach a level of 30:1, and the water content is 60wt%. The difference from Example 1 is that the weight ratio of conditioning agent, expansion agent and heavy metal deactivator is 18.5:20.5:2.8.

[0042] 2), then add the fermented strains that account for 0.5% by weight of the fermentation medium, fully stir to form high-temperature compost, and keep the relative humidity at 70%;

[0043] 3) Put the high-temperature compost material into a ventilated and rain-proof environment for strip-type high-temperature composting, control the temperature at 50°C, continue fermentation for 6 days, control the water content at 40%, and make the primary material of organic fertilizer;

[0044] 4) ...

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Abstract

The invention discloses a method for producing a high-efficiency biological organic fertilizer by quickly fermenting sludge. The method comprises the following steps of: preparing a culture medium; fermenting; crushing; balling; drying; cooling and the like. The method has the advantages of wide raw material sources, simple process equipment, low cost, convenience in operation, and short fermentation time; and the fermented sludge can be used for producing the organic fertilizer, so that the technical problems of secondary environmental pollution and the waste of massive organic fertilizer sources in the prior art are solved.

Description

technical field [0001] The invention relates to a method for treating and disposing excess sludge in a sewage treatment plant, in particular to a method for producing high-efficiency bio-organic fertilizer by high-temperature rapid fermentation of excess sludge. Background technique [0002] With the popularization and operation of urban sewage treatment plants in our country, the sludge output of urban sewage treatment plants has increased rapidly, and the treatment and disposal of a large amount of sludge has become a major environmental problem to be solved in the process of urban development in our country. [0003] At present, foreign sludge treatment and disposal technologies mainly include land use microbial treatment, incineration and landfill. Among them, Japan has always been a typical representative country that insists on sludge incineration treatment and disposal. 68%-70% of Japan's wet sludge is dried and incinerated to achieve the greatest reduction. The slag ...

Claims

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Application Information

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IPC IPC(8): C05F17/00C05F7/00
CPCY02A40/20Y02W30/40
Inventor 宋建国刘伟高世熊
Owner YANTAI UNIV
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