Waste water treating process of circulation sequence batched active sludge and its active sludge reactor

Abstract

The present invention discloses circular sequential batch active sludge process for treating waste water and its active sludge reactor. The reactor consists of two main reactor tanks and two auxiliary reactor tanks connected through passage or control valve to form a closed ring. Each of the main reactor tanks is provided with aerator and water inlet in the upstream tank wall; and each of the auxiliary reactor tanks is provided with stirrer, residual sludge pump, water inlet in the upstream tank wall and water drainer in the downstream tank wall. The present invention completes the circular plug-flow waste water treatment in the closed ring space comprising two main reactor tanks and two auxiliary reactor tanks, and makes the reactor tanks in anoxia, anaerobic, aerobic and deposit steps successively, so as to eliminate nitrogen and phosphate, degrade organic matter and separate solid from liquid. The present invention has the advantages of high treating effect, flexible management and low running cost.

Description

Technical field [0001] The invention relates to a process and a device for degrading sewage using an activated sludge method, in particular to a cyclic sequencing batch type activated sludge method sewage treatment process and an activated sludge reactor. Background technique [0002] Conventional activated sludge method is currently the most commonly used sewage treatment technology. It uses microorganisms to first convert organic matter into carbon dioxide, water, and microbial cells. After the reaction, the microorganisms are preserved, and the excess sludge is removed from the system at an appropriate time. The new microorganisms are removed from the system to achieve the purpose of degrading the pollution load. Commonly used activated sludge wastewater treatment technologies include continuous flow, sequential batch, and a combination of continuous flow and sequential batch. [0003] The continuous flow process performs this process through the conversion of the space of eac...

AI Technical Summary

Problems solved by technology

[0005] These improved SBR processes not only solve the shortcomings of the classic SBR process, such as continuous water inflow and outflow, but also improve the volume and equipment utilization, and strengthen the effect of partial treatment, but also lead to poor sedimentation effect, complicated operation management and control, single Disadvantages such as unbalanced pool load

For example, ICEAS, DAT-IAT, LUCAS and UNITANK have poor nitrogen and phosphorus removal effects; CASS has good nitrogen and phosphorus removal functions, but cannot continuously discharge water; MSBR has a combined seven-pool structure, which has good nitrogen and phosphorus removal effects , but the equipment and control system are complex and expensive

In short, these improved SBR processes have solved the problems existing in the classic SBR process to varying degrees, but they have also more or less weakened the advantages of the classic SBR process, resulting in many shortcomings in practical applications and the stability of the process system. The effects of sewage and sewage treatment are affected to varying degrees, and these problems need to be improved and perfected

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