Composite greenhouse ecological functional bed and method for utilizing composite greenhouse ecological functional bed to conduct sludge amount reduction and ecological disposal

Abstract

The invention discloses a composite greenhouse ecological functional bed and a method for utilizing the composite greenhouse ecological functional bed to conduct sludge reduction and ecological disposal. The composite greenhouse ecological function bed includes a composite greenhouse and an internal ecological functional bed body, the composite greenhouse is a steel frame structure unit, and a ceiling is subjected to combined sealing by highly hydrophobic glass; the ecological functional bed body sequentially consists of a bed body reinforcing layer, a coal ash filtering disposal layer, a rough gravel drainage layer, an earthworm layer and a sludge placement layer from bottom to top. The method includes the steps that sludge the water content rate of which is 90-98wt% is pumped into an adjustment pond and then introduced into the composite greenhouse ecological functional bed intermittently according to the sludge standing time of the functional bed, wherein the standing time is 25-48hours. According to the composite greenhouse ecological functional bed, not only can moisture in the sludge be reduced and dry materials in the sludge are decreased, but also reduction of the moistureand the dry materials in the sludge can be achieved, sludge intercepted on the surface of a disposal system can be effectively prevented from emitting stink and breeding mosquitoes and flies, the moisture content of the disposed sludge is low, and the reduction effect is obvious.

Description

technical field [0001] The invention relates to a sludge reduction and ecological treatment method, in particular to a compound greenhouse ecological function bed and a sludge reduction and ecological treatment method using it. Background technique [0002] At present, after the sludge in the sewage treatment plant has been flocculated and conditioned, the moisture content of the sludge can be reduced to about 80% by using dehydration equipment such as belt filter press, plate and frame filter press and centrifuge, but the moisture content of the sludge can be further reduced to Below 60%, it is difficult to achieve at present. Sludge with a high moisture content not only increases the transportation cost of sludge, but also sludge with a moisture content of more than 60% cannot meet the disposal requirements of subsequent sludge landfill, composting, and incineration. Because the sludge contains a large amount of heavy metals, pathogenic bacteria and refractory organic mat...

AI Technical Summary

Problems solved by technology

Patent CN102515451A discloses a sludge drying filter bed based on constructed wetland, which is based on a wetland for sludge treatment, and the mud distribution pipes are distributed on the surface of the wetland, and the surface of the sludge system will intercept the sludge and emit odor Odor, easy to breed mosquitoes and flies, purely due to the high water content of the sludge in the ecosystem, the disposal cycle is long, and the treatment efficiency of the sludge is low

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