High-efficiency denitrification and phosphorus removal multi-stage ao+sbr sewage treatment reaction tank and method

Abstract

The invention discloses a high-efficiency denitriding and dephosphorizing multi-stage AO+SBR sewage treating reaction tank and a sewage treating method. The reaction tank comprises a comprehensive pipe gallery chamber and a mud-water separating tank, wherein one side of the comprehensive pipe gallery chamber is provided with a first oxic tank, a first anoxic tank, a second oxic tank, a second anoxic tank, a third oxic tank, a third anoxic tank and a first SBR tank; the left side of the first oxic tank is provided with a first anaerobic tank and a first pre-anoxic tank; the other side of the comprehensive pipe gallery chamber is provided with a fourth oxic tank, a fourth anoxic tank, a fifth oxic tank, a fifth anoxic tank, a sixth oxic tank, a sixth anoxic tank and a second SBR tank; the left side of the fourth oxic tank is provided with a second anaerobic tank and a second pre-anoxic tank; the mud-water separating tank is communicated with the third anoxic tank and the sixth anoxic tank; the mud-water separating tank is communicated with the first pre-anoxic tank and the second pre-anoxic tank. According to the high-efficiency denitriding and dephosphorizing multi-stage AO+SBR sewage treating reaction tank and the sewage treating method, a multistage AO process and an SBR process are fused into a novel combination-type treatment process; principles and advantages of the multistage AO process and an MSBR process are fused.

Description

technical field [0001] The invention relates to a water treatment system and method, more specifically, to a multi-stage AO+SBR sewage treatment reaction tank and method for efficient nitrogen and phosphorus removal. Background technique [0002] With the improvement of effluent water quality requirements, sewage treatment has developed from the separate removal of SS, BOD, COD and other pollutants to the technology of nitrogen and phosphorus removal. [0003] A 2 The O process and its variants, especially the multi-stage A / O process with multi-stage water inflow, realize the function of denitrification and phosphorus removal through the alternation of anaerobic, anoxic, aerobic and point-in-water inflow. The multi-stage A / O process with multi-stage water inflow can reasonably use carbon sources and better solve the contradiction between nitrogen and phosphorus removal on carbon sources. At present, it has gradually developed into the mainstream treatment process for nitrog...

AI Technical Summary

Problems solved by technology

But it mainly has three shortcomings: 1. Since there is no supplement of influent carbon source in the anaerobic section, the phosphorus removal efficiency needs to be further improved

3. The biological reaction section is separated from the precipitation section, occupying a large area

However, the MSBR process has inherent disadvantages. Because all the influent water passes through the anaerobic section and then goes to the anoxic section, and the aerobic section passes through a large amount of internal reflux to the anoxic section for denitrification, the carbon source utilization efficiency is lower than that of multi-stage A / O. Process and a large amount of internal reflux are not enough to save energy; in addition, the aeration of each SBR process section of the MSBR tank cannot be connected in sequence, resulting in instantaneous peak air supply of the blower, which is not conducive to the operation of the blower

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