Municipal sludge blending modifying agent and sludge semi-drying method

Abstract

In allusion to the defect that in the prior art, sludge blending modifying products and methods have a poor sludge reducing effect, which ultimately causes reduction in actual sludge utilizing and disposing efficiency, the invention provides a municipal sludge blending modifying agent and a using method thereof. The municipal sludge blending modifying agent comprises a component A, a component B and a component C, wherein the component A is a mixed solution of a bamboo-vinegar stock solution and a lactic acid bacterium-fermented stock solution; the component B is a hydrogen peroxide solution with the concentration of 30%; the component C is a polyaluminum solution with the concentration of 30%. The using method of the municipal sludge blending modifying agent comprises the following steps: sequentially adding the components into sludge, stirring, adjusting the pH value, and layering to obtain the blended modified sludge. The invention further provides a sludge semi-drying method by which physical pressure filtration is performed on the blended modified sludge. The municipal sludge blending modifying agent is simple in components and good in sludge modifying effect; the using method is simple and convenient in process and easy to implement; by the sludge semi-drying method, sterilization, deodorization and deep dewatering during sludge treatment can be completed at one time, the dewatering reduction effect is obvious, and the sludge disposing efficiency can be improved.

Description

technical field

[0001] The invention relates to a municipal sludge treatment product and method, in particular to a municipal sludge mixing and modifying agent and its use method, and a municipal sludge semi-drying method, belonging to the fields of environmental chemical engineering and sludge disposal . Background technique

[0002] Municipal sludge is the product of sewage treatment, mainly from the primary sedimentation tank, secondary sedimentation tank, gravity concentration tank and other process links of the sewage treatment process. With the continuous improvement of my country's urban sewage treatment rate, the sludge output of urban sewage treatment plants has also increased sharply. According to incomplete statistics, at present, only a small part of the sludge from urban sewage treatment plants in the country is used for sanitary landfill, land use, incineration and building material utilization, while most of it has not been treated and disposed of in a standa...

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