Treatment method for deep dewatering of sludge

Abstract

The invention discloses a treatment method for deep dewatering of sludge. The treatment method comprises the following steps: (a) providing a sludge suspension; (b) adding a reducing agent into the sludge suspension, and mixing uniformly to ensure that the sludge is subjected to reduction reaction; and (c) performing solid-liquid separation after the reduction reaction to obtain treated sludge. According to the treatment method for the deep dewatering of the sludge, provided by the embodiment of the invention, the reducing agent is used for performing reduction reaction on the sludge before the solid-liquid separation, so that the surface structure of the sludge can be effectively changed, extracellular polymers can be effectively stripped, and the cell walls can be effectively broken to ensure that the dewatering performance of the sludge can be effectively improved, the absolute amount of the treated sludge is reduced, and the problems of stacking and the like are reduced; and meanwhile, only a very small amount of the reducing agent is added to avoid addition of a large number of chemicals and introduction of new pollutants. Moreover, toxic and harmful substances in the sludge can be greatly reduced, and rapid deodorization of the sludge can be realized.

Description

technical field [0001] The invention relates to the technical field of chemical engineering, in particular to the technical field of sludge dewatering. Background technique [0002] With the rapid development of economy and society and the gradual improvement of people's quality of life, the discharge of industrial wastewater and domestic wastewater is increasing day by day. The sludge method is a process commonly used in various sewage treatment plants at present. It has the characteristics of mature technology, stable process, high treatment efficiency, and low operating costs, but it will also produce a certain amount of excess sludge at the same time, and the disposal of excess sludge The cost accounts for more than 50% of the operating cost of the entire sewage treatment plant. [0003] According to China Water Network's "China Sludge Treatment and Disposal Market Analysis Report (2013 Edition)", by 2015, my country's annual surplus sludge (containing 80% moisture)...

AI Technical Summary

Problems solved by technology

The disadvantages are that the equipment structure is more complicated, the current action time is limited, the current utilization efficiency is low, and the sludge surface structure is not effectively changed, the extracellular polymer is stripped, and the cell wall is damaged.

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