Sludge bio-drying treatment technology

A biological drying and sludge technology, applied in biological sludge treatment, dehydration/drying/thickened sludge treatment, etc., can solve the problems of environmental pollution, high power consumption, high cost, etc., to avoid environmental pollution and improve utilization rate , Improve the effect of drying efficiency

Inactive Publication Date: 2015-04-22
MINZU UNIVERSITY OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the technical problems of the existing sludge drying (thermal drying) such as high power consumption, high cost, large land occupation, and serious environmental pollution during the drying process, and further provides a sludge drying method using microbial fermentation. Mud Biological Drying Treatment Technology

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  • Sludge bio-drying treatment technology
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  • Sludge bio-drying treatment technology

Examples

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Embodiment 1

[0056] The sludge biological drying treatment of the present invention is a drying treatment process of fresh sludge with a water content of 76% to 84% after concentration treatment. In this example, 3000 kg of concentrated fresh sludge was taken directly from the domestic sewage treatment plant, and its moisture content was detected to be 80%. For the indicators of the fresh sludge, please refer to Table 7; in addition, it also contains a large amount of organic matter, coliform bacteria, insect eggs, etc.

[0057] name Mercury (Hg) Arsenic (As) Lead (Pb) Cadmium (Cd) Chromium (Cr) content 0.322 10.26 60.2 1.23 82.6

[0058] The biological drying treatment of sludge of the present invention comprises the following steps:

[0059] a. Deploy fresh sludge moisture content: Stir and mix the fresh sludge with a moisture content of 80% and the base material with a moisture content of 30% at a weight ratio of 1:1.5 to obtain a mixture with a moistu...

Embodiment 2

[0067] The sludge biological drying treatment of the present invention is a drying treatment process of fresh sludge with a water content of 76% to 84% after concentration treatment. In this example, 5000 kg of concentrated fresh sludge was taken directly from the domestic sewage treatment plant, and its water content was 82% after testing. The indicators of the fresh sludge are roughly the same as those in Table 7 above. The biological drying treatment of sludge of the present invention comprises the following steps:

[0068] a. Deploy fresh sludge moisture content: Mix 3000kg of fresh sludge with a moisture content of 82% and the base material with a moisture content of 30% in a weight ratio of 1:1.6 to obtain a mixture with a moisture content of 50%. The base material selected in this example is the dried sludge in Example 1, with a moisture content of 30% and a weight of 4800 kg. According to theoretical analysis, the moisture content after mixing the fresh sludge and the...

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Abstract

The invention relates to a sludge bio-drying treatment technology using microbial fermentation drying. Technical problems of high electricity consumption and sever environmental pollution of present sludge drying are solved in the invention. The technology is characterized in that concentrated fresh sludge with the water content of 76-84% is dried, and the technology comprises the following steps: blending the fresh sludge to adjust the water content, adding an inoculant, and fermenting and drying the sludge. Dried sludge obtained after the drying treatment can be used to replenish soil. The bio-drying technology using microbial aerobic fermentation produced heat to evaporate water fully utilizes the biological energy of the sludge, so the bio-drying technology has the advantages of economy, energy saving, environmental protection, increased drying efficiency and shortened drying cycle.

Description

technical field [0001] The invention relates to the treatment technology of sludge, which is the product of sewage treatment, especially the biological drying treatment technology of sludge. Background technique [0002] During the treatment of urban domestic sewage, a large amount of sludge is generated through the process links such as primary sedimentation tank and secondary sedimentation tank. Under normal circumstances, the amount of sludge produced per 10,000 tons of sewage after treatment (based on a moisture content of 80%) is about 6 to 8 tons. The sludge produces a foul smell and contains a large amount of heavy metal elements (such as Cd, Hg, As, Pb, Ni, Cr, Cu, etc.), harmful organic substances (such as benzopyrene, polychlorinated biphenyls) and fecal colon Harmful bacteria such as bacteria and roundworm eggs pose a serious threat to urban environmental pollution. [0003] At present, sludge disposal can be roughly divided into: sanitary landfill, composting l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/04C02F11/12
Inventor 刘京南刘子腾
Owner MINZU UNIVERSITY OF CHINA
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