Sludge concentration method and filtering separation device thereof

Abstract

The invention provides a sludge concentration method and a filtering separation device thereof. The concentration method comprises the following steps of: performing filtering separation on primary sedimentation sludge or remained active sludge in a secondary sedimentation tank or mixed sludge of the primary sedimentation sludge and the remained active sludge in the filtering separation device and by tubular filter cores to obtain concentrated sludge, and discharging the filtered clear solution; putting the concentrated sludge on a filter press for press filter dewatering; and obtaining a sludge cake and transferring the sludge cake. The filtering separation device comprises a cylinder, tubular filter cores vertically distributed in the cylinder, a fixing plate, a water collection tank, asludge inlet arranged on the cylinder, a sludge collection zone, a sludge discharge channel provided with a valve and the like. The sludge concentration method and the filtering separation device have the advantages of low water content in the concentrated sludge, short concentration time, small floor areas, small device volume, low investment cost, low operating cost and long service life of thefilter cores due to the use of back wash filter cores.

Description

technical field [0001] The invention relates to a sludge concentration method and device in the sewage treatment process, in particular to a sludge concentration method and a filtration and separation device generated in the sewage treatment. Background technique [0002] The sludge in the currently known sewage treatment process mainly includes the primary sludge in the primary sedimentation tank and the remaining activated sludge in the secondary sedimentation tank or the mixed sludge of the two. The concentration and dehydration include: gravity concentration, air flotation concentration and mechanical concentration etc. Among them, gravity concentration is the most commonly used sludge concentration method at present. It is essentially a sedimentation process. The residence time of sludge in the tank is generally more than 12 hours. Although its process technology, structure and operation management are simple, it occupies a large area and Poor sanitary conditions; air ...

AI Technical Summary

Problems solved by technology

The water quality of the membrane effluent of this invention reaches the standard of reclaimed water, and can be reused in fields such as greening and road flushing, but the moisture content of the concentrated sludge of this invention is relatively high (97-98%), and the membrane operation process requires power consumption, investment and operation. higher cost

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