Real-time control system and method for short-cut nitrification and coupled double-SBR denitrifying phosphorus removal

Abstract

The invention discloses real-time control system and method for short-cut nitrification and coupled double-SBR denitrifying phosphorus removal, belonging to the field of biological sewage treatment. The system comprises a raw water tank, two A<2> / O-SBR reactors, an N-SBR reactor, a PLC control cabinet and a computer. The method comprises the following steps of flowing raw water into the A<2> / O-SBR reactor to be subjected to an anaerobic phosphorus release reaction and then entering discharged water into the N-SBR reactor to be subjected to short-cut nitrification, wherein the nitrification process is controlled through the output of the computer; after the reaction is over, flowing nitrification liquid back into the A<2> / O-SBR reactor I to be subjected to an anaerobic denitrifying phosphorus removal reaction; after the anaerobic denitrifying phosphorus removal reaction is finished, performing aeration for a while, and then performing static settling and water draining so as to adjust the volume exchange ratio, the reaction time and the aeration quantity accordingly; after the reaction in the N-SBR reactor is finished, starting the A<2> / O-SBR reactor II of which the operation mode is the same as the A<2> / O-SBR reactor I, so that the vacancy rate of the N-SBR reactor can be reduced. The system and the method have the advantages that on-line real-time control is adopted, system operation is optimized, the degree of automation is high, the controllability is good, and deep nitrogen and phosphorus removal of low-C / N domestic sewage can be realized.

Description

technical field [0001] The invention relates to a real-time control system and method for short-range nitrification coupling double SBR denitrification phosphorus removal, and belongs to the technical field of sewage biological treatment. Background technique [0002] With the increasingly prominent problem of "eutrophication" in water bodies and stricter sewage discharge standards, sewage treatment technology has moved from the stage of single-purpose removal of organic matter to the advanced treatment stage of both removal of organic matter and denitrification and phosphorus removal, in order to control eutrophication. Nitrogen and phosphorus removal for the purpose of trophication has become one of the research hotspots in the field of sewage biological treatment. However, due to the contradictions between nitrifying bacteria, denitrifying bacteria and phosphorus accumulating bacteria in terms of sludge age and carbon source competition, traditional nitrogen and phosphoru...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at problems such as low C / N of domestic sewage, poor nitrogen and phosphorus removal effect of traditional nitrogen and phosphorus removal process, and high energy consumption, etc., and couples short-range nitrification and denitrification phosphorus removal technology to realize synchronous depth of nitrogen and phosphorus removal, while employing real-time control to increase the controllability and flexibility of the device

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