Device and method for removing granular organic matters and producing NO2<->-N based on hydrolytic acidification coupling short-cut denitrification technology

Abstract

The invention discloses a device and a method for removing granular organic matters and producing NO2<->-N based on hydrolytic acidification coupling short-cut denitrification technology, and belongsto the field of biological sewage treatment. The device comprises a granular organic matter wastewater tank, a NO3<->-N wastewater tank, a single-stage hydrolytic acidification coupling short-cut denitrification SBR reactor, and a water outlet tank. The method comprises the following steps of: taking sewage plant residual sludge as seed sludge, hydrolyzing and acidifying granular organic matters into micromolecular organic matters by hydrolytic acidification bacteria in the seed sludge of an anaerobic section; reducing NO3<->-N into NO2<->-N with denitrifying bacteria in seed sludge from an anoxic section by taking generated small molecular organic matters as electron donors. Through gradual increase of inlet water organic matters and enrichment culture of NO3<->-N load reinforced hydrolytic acidification bacteria and short-cut denitrification bacteria, removal of granular organic matters and production of NO2<->-N is finally realized. According to the method, an external carbon sourceis not needed, the control is simple, and the technical problems that granular organic matters are not beneficial to stable accumulation of NO2<->-N in the denitrification process and enrichment of short-cut denitrification strains are solved.

Description

technical field [0001] The short-range denitrification technology based on hydrolysis acidification coupled with the present invention realizes the removal of particulate organic matter and the removal of nitrous (NO 2 - -N) The device and method of output belong to the technical field of sewage biological treatment, and are a method for solving the problem of particulate organic matter being unfavorable for NO in the denitrification process. 2 - -N stable accumulation and short-range denitrifying bacterial species enrichment method of technical difficulties. Background technique [0002] Anammox autotrophic denitrification technology (Anammox) is by far the most economical and effective biological denitrification method. Compared with the traditional nitrification and denitrification biological denitrification process, Anammox can save 60% of aeration and 100% of organic carbon At the same time, this process can greatly reduce the production of sludge and the emission of...

AI Technical Summary

Problems solved by technology

Using the residual sludge from sewage plants as seed sludge, using anaerobic hydrolysis acidification coupled with short-range denitrification technology to solve the problem that particulate organic matter is not conducive to NO in the denitrification process. 2 - -The technical problems of stable accumulation of N and enrichment of short-range denitrifying bacteria, while making full use of the raw water carbon source, provide stable NO for the large-scale application of anammox autotrophic denitrification technology in mainstream sewage plants 2 - -N source

Images