Urban sludge pit reduction pretreatment method based on vacuum pre-pressing method

Abstract

The invention provides an urban sludge pit reduction pretreatment method based on a vacuum pre-pressing method. The urban sludge pit reduction pretreatment method comprises the following steps of arranging vertical water drainage bodies, and reserving binding plate heads; paving a vacuum main pipe and filter pipes, specifically, arranging the vacuum main pipe and the filter pipes in an orthogonalway, arranging one filter pipe between every two rows of vertical water drainage bodies, and respectively binding and connecting both sides of each filter pipe and the adjacent reserved plate heads; arranging activated water drainage bags on a ground surface to an area 2 to 3m under the ground surface, specifically, enabling each water drainage bag to expose out of the sludge surface with enough length, binding with the corresponding filter pipe, arranging one row of activated water drainage bag at the interval of two rows of vertical water drainage bodies, and respectively connecting the twosides of each filter pipe and the adjacent row of activated water drainage bag. The urban sludge pit reduction pretreatment method has the advantages that the problem of difficulty in filling of a biological activator by surface rotary spraying equipment is solved by the activated water drainage bags on a sludge surface layer, the water content of treated sludge is reduced to 40% to 50%, and the problem of lower sludge mechanical-filling efficiency in a sludge pit is solved; the treated sludge is obviously improved by the bearing capacity of the sludge surface layer, the requirements of miniature machines are met, and the mechanical operation can be performed on the sludge surface.

Description

technical field [0001] The invention relates to the technical field of municipal sludge treatment, in particular to a pretreatment method for urban sludge pit reduction based on a vacuum preloading method. Background technique [0002] Municipal sludge refers to the solid waste produced in the process of wastewater treatment in municipal sewage plants. Sludge has a high water content, is perishable, and has complex components. It not only contains a large amount of organic matter, N, P, K and other elements, but also contains a large amount of pathogenic bacteria, bacteria, parasite eggs and heavy metals. In the traditional method, most of the sludge disposal is landfill, which is the simplest and most feasible, but it will cause problems such as land occupation, groundwater or marine environment pollution, and landfill seepage. With the problems caused by the accumulation of sludge gradually attracting the attention of the whole world, my country has also successively issu...

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Problems solved by technology

[0003] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a pretreatment method for urban sludge pit reduction based on the vacuum preloading method, which solves the problem of low sludge disposal efficiency in the prior art

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