Hypoxic/anaerobic UASB-SBR landfill leachate shortcut biological denitrification method and apparatus

Abstract

A hypoxic / anaerobic UASB-SBR landfill leachate short-range biodenitrification method and device belongs to the biological treatment technology field of wastewater. A hypoxic / anaerobic UASB-SBR biochemical system is used for achieving synchronous and deep removal of organic matters and nitrogen in landfill leachate by the short-range biodenitrification. By using the way of the return of SBR nitrification liquid, not only a certain degree of dilution function is carried out on the original leachate, but also the nitrification liquid containing rich NO2<->-N can conduct denitrification with the help of rich organic carbon sources in raw water, so two functions of denitrification (hypoxic reaction) and methane generation (anaerobic reaction) are achieved in the same UASB reactor, the removal rate of more than 94.4 percent of organic matters and the denitrification rate of more than 99.5 percent are obtained, and the dual objectives of biological nitrogen removal and organic matter removal are achieved. The SBR reactor obtains over 99.5 percent of nitrification and denitrification rate; the effluent total nitrogen is less than 20mg / L; and deep nitrogen removal is obtained. In addition, pH, ORP, and DO are used as the control parameters in the biological nitrogen removal process of an SBR system, so the nitrification and denitrification terminals of the SBR reactor can be accurately monitored, and the operating cost is saved.

Description

technical field [0001] The invention relates to a sewage biological treatment method and device, in particular to a sewage treatment method and device for biological denitrification and organic matter removal of organic industrial wastewater with high ammonia nitrogen and high organic matter. Background technique [0002] Municipal landfill leachate is a kind of high-concentration organic wastewater with very complex components, among which high ammonia nitrogen and high organic matter are its important water quality characteristics. In addition, the leachate is dark brown, strong irritation and a large number of inorganic compounds all bring difficulties to the treatment of leachate. Because biological denitrification can achieve real nitrogen removal instead of "pollution transfer", biological method is the most economical, effective and widely used method for treating landfill leachate. Compared with the aerobic biological method, the anaerobic biological method has the ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method and device for short-range biological denitrification of landfill leachate, to solve the technical problem that high ammonia nitrogen landfill leachate is difficult to treat biologically; and to solve the problem of deep denitrification and deep removal of organic matter in high-concentration organic wastewater

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