Dehydration method for reducing water content of sludge in microbial fermentation way

A technology of microbial fermentation and moisture content, applied in biological sludge treatment, sludge treatment, dehydration/drying/concentrated sludge treatment, etc., can solve the problems of high energy consumption and high investment, save machinery investment and operating costs, Conducive to the effect of resource utilization

Active Publication Date: 2014-01-08
HENAN JINGU IND DEV
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to provide a dehydration method that uses microbial fermentation to reduce the water content of sludge, thereby solving the problems of high energy consumption and high investment in traditional sludge enhanced dewatering technology

Method used

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  • Dehydration method for reducing water content of sludge in microbial fermentation way

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Embodiment 1

[0030] Such as figure 1 As shown, the dehydration method that utilizes microbial fermentation provided by the present invention to reduce the moisture content of sludge mainly includes two steps of granulation and fermentation, specifically set forth as follows:

[0031] (1) Material mixing and granulation and bacteria dosing

[0032] Taking the preparation of 100kg of granular sludge for fermentation as an example, after turning on the disc granulator, first add 55kg of lumpy sludge (moisture content 75%~80%) from the urban domestic sewage treatment plant to the disc granulator In the process, after the sludge is added, the dry material and crushed straw are added at a mass ratio of sludge: dry material: straw of 0.55:0.35:0.10, that is, the amount of dry material added is 35kg, and the amount of straw added It is 10kg. The dry material is sludge with a moisture content of 30% after drying, and the straw is crushed wheat straw, and the particle size of the crushed straw is ...

Embodiment 2

[0049] The dehydration method used in this example to reduce the moisture content of the sludge by microbial fermentation is the same as in Example 1, and the granulation process is the same, the difference lies in the material ratio and the aerobic fermentation method of the heap. The specific differences and the experimental process are as follows:

[0050] The mixing ratio of each material used in this embodiment is as follows:

[0051] According to the mass ratio, sludge: dry material: straw quality = 0.50:0.40:0.10, and the dosage of composite strain BYM is 0.25%. The dry material used the granular sludge finally prepared in Example 1 after multiple batches of fermentation.

[0052] This embodiment adopts the static stacking fermentation method. After granulation, the granular sludge is about 30t, and it is statically stacked. The pile body is conical and the height is 3m. There is a ventilation pipe at the bottom of the pile body, and a temperature measuring device is bu...

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Abstract

The invention belongs to the technical field of sludge treatment, and particularly relates to a dehydration treatment method for reducing the water content of sludge. The method comprises the two procedures of mixing and granulating the sludge, a dry material, straws and a composite strain BYM, and performing stacking fermentation. According to a principle for the dehydration method for reducing the water content of the sludge in a microbial fermentation way, a great amount of heat can be produced in a microbial fermentation process, and can be used for reducing the water content of the sludge with low cost. Compared with the prior art, the method has the advantages of low energy consumption, low material consumption and low cost; the water content of the fermented sludge is reduced to be lower than 30 percent, the sludge has great development potential, and can be used as an organic compound fertilizer or a building material, and the resource utilization of a product is facilitated.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, and in particular relates to a dehydration treatment method for reducing the moisture content of sludge. Background technique [0002] At present, with the continuous advancement of urbanization and people's increasing concern for environmental protection, the sludge generated in the process of urban domestic sewage treatment and its disposal have become an increasingly serious problem. In recent years, although my country has carried out a lot of work in the treatment and disposal of sludge, due to economic and technical reasons, my country's sludge treatment capacity is still very weak, mainly in: the sludge treatment rate that meets the requirements of environmental protection is low; sludge The level of treatment design is low, the process is not perfect, the facilities are backward, and the investment is small; the policy is not perfect, the supervision is not in place; the relevant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/02C02F11/12
CPCY02W10/20
Inventor 李顺灵潘志恒黄立志袁明涛李万灵燕战军张鋆浩施龙王静
Owner HENAN JINGU IND DEV
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