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Ecological sludge disposal bed

A technology for disposal of beds and sludge, applied in sludge treatment, biological sludge treatment, etc., can solve problems such as secondary pollution, and achieve the effects of reduced operating costs, low reclamation costs, and low investment

Inactive Publication Date: 2014-06-25
CHANGZHOU UNIV
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to solve the secondary pollution and new environmental problems caused by the surplus sludge produced by the small sewage treatment plants located in small towns during the landfill process, and at the same time solve the problem of subsidence caused by the subsidence of the coal mining area. In view of the problem that the basin cannot be reclamated scientifically, a simple operation and low investment system for reclamation of coal mine subsidence land and residual sludge treatment and utilization system is provided. Coal gangue is used as filling material to transform and reclaim coal mine subsidence land. The subsidence basin is designed as a sludge ecological disposal bed to treat excess sludge, combining the reclamation of subsidence land, the treatment and utilization of coal gangue with the resource utilization of excess sludge, and taking the road of treating waste with waste

Method used

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Experimental program
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Embodiment

[0025] Taking the subsidence of a coal mine in northern Jiangsu as an example, the probability integral method is used to predict and calculate the size, scope and depth of the subsidence basin before the surface sinks:

[0026] ① Determine the geological mining technical conditions, namely the mining thickness V, the coal seam dip angle δ, and the mining area lower boundary mining depth H 1 , upper boundary mining depth H 2 , goaf inclination length D 1 , towards the long D 3 , oblique horizontal projection length D 1s ; These data can be obtained from local geological exploration data.

[0027] ② Determine the surface movement parameters

[0028] Sinking coefficient q, main influence angle tangent tgβ, inflection point offset distance S 1 , S 2 , S 3 , S 4 , mining impact propagation angle θ; these parameters are provided by mobile surface observation stations in the mining area.

[0029] ③Determine the calculation length of the goaf: inclination length L, strike le...

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Abstract

The invention relates to an ecological sludge disposal bed of a small-scale sewage disposal plant. Excess sludge, gangue and clay are taken as filling materials which are directly arranged in a collapse basin and mixed to generate organic filling soil, and therefore, the problem of lack of organic soil satisfying plant growing conditions in land reclamation is solved, and the problems of gangue storage and land occupation due to excess sludge landfill are solved; and the excess sludge is directly from the sludge thickener of the sewage disposal plant, the subsequent disposal link of the sludge is omitted and the operation cost of the sewage disposal plant is reduced. The ecological sludge disposal bed is simple and convenient to operate, low in investment, low in operation cost, and especially suitable for the treatment and disposal of the sludge generated by the small-scale sewage disposal plants, and land reclamation of large-area sunk land formed by large-scale diggings.

Description

technical field [0001] The invention relates to the technical field of sludge disposal, in particular to a sludge ecological disposal bed of a small sewage treatment plant. Background technique [0002] With the rapid development of my country's economy, the amount of sewage discharge continues to expand, and the government's environmental protection efforts are also continuously strengthened. The treatment and disposal of excess sludge generated by sewage treatment plants has become increasingly difficult, which has become a constraint for the sustainable development of the entire sewage treatment industry. Bottleneck problem. For large-scale sewage treatment plants, sludge reduction and resource utilization can be achieved by using technologies such as digestion, pyrolysis, incineration and brick making; for treatment scales less than 30,000 m 3 / d's small sewage treatment plants located in small towns are currently mainly landfilled due to limitations in cost, technology,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/02
CPCY02W10/20
Inventor 万玉山黄利涂保华邵敏王莉
Owner CHANGZHOU UNIV
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