Technology for rapidly treating domestic sewage discharged without residual mud by second-stage adsorption

Abstract

The invention relates to a combined process system for rapidly treating urban sewage discharged without residual mud, belonging to a sewage treatment process. The process flow is as follows: urban sewage is sequentially subjected to primary active mud absorption treatment, primary air flotation concentration treatment, secondary active mud absorption treatment and secondary air flotation concentration treatment, and clear water can reach the emission standard after the two air flotation concentration separations; and the high-concentration mud-water mixed mud which is obtained through the two air flotation concentration separations flows back to a primary absorption tank and a secondary absorption tank after being subjected to pure oxygen aero biological treatment and deposition and regeneration treatment. The process has the advantages that the time for water treatment is greatly shortened, water can be discharged from the sewage through primary absorption and secondary absorption as well as primary air flotation and secondary air flotation, and the whole process (not including homogeneity and average quantity adjusting time) only needs 2-3h; all the mud is used for backflow to realize zero emission of the mud; the time for water treatment is greatly shortened, therefore, the volume of each structure is reduced, the floor area is greatly reduced and the power energy can be saved by 30-40 percent.

Description

technical field [0001] The invention relates to a combined process system for urban sewage treatment without excess sludge and fast discharge, which belongs to the sewage treatment process. Background technique [0002] At present, the most widely used biological treatment technology in urban sewage treatment in the world is the activated sludge method, which uses the adsorption and biochemical oxidation of activated sludge to decompose and remove dissolved and colloidal organic substances in sewage, so that wastewater can be purified. [0003] Since the establishment of the activated sludge process in 1914, after nearly a hundred years of development and transformation, more than a dozen various process methods based on the traditional activated sludge process have been formed. The common problems of these methods are: first, a large amount of residual sludge is generated; second, the treatment time is long, and the structure occupies a large area; third, energy consumption...

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a new sewage treatment technology with no excess sludge discharge in the treatment system, short treatment time and low energy consumption, so as to solve the problems of excess sludge generated in the process of urban sewage treatment, more energy consumption and Problems with large structures

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