Anaerobic-oxidation ditch-SACR combined deep denitrification system and process for sewage with high ammonia nitrogen content

Abstract

The invention provides an anaerobic-oxidation ditch-SACR combined type deep denitrification system and process for sewage with high ammonia nitrogen content. According to the process, high-ammonia-nitrogen sewage firstly enters an anaerobic reactor for removal of most of organic matters; the effluent of the anaerobic reactor enters an oxidation ditch reactor for removal of biochemical organic matters, ammonia nitrogen and a part of total nitrogen in the sewage in the oxidation ditch; the effluent of the oxidation ditch reactor enters an intermediate water tank; under the control of water quality detection equipment and a PLC, a part of raw water is introduced into the intermediate water tank to adjust the carbon-nitrogen ratio of the sewage; and then the effluent enters an SACR reactor. Byutilizing the characteristics of denitrifying bacteria and by regulating and controlling the SACR reactor via a PH / DO / ORP detector and the PLC, the sewage is accurately subjected to pre-denitrification / nitrification / endogenous denitrification, so deep denitrification is realized; meanwhile, an external carbon source is not needed, and the treatment cost of the process is low; and for a built sewage treatment facility adopting an oxidation ditch process, the process with the above technical scheme can be implemented only by additionally arranging the intermediate water tank and the SACR reactor, so upgrading and reconstruction cost is low.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an anaerobic-oxidation ditch-SACR combined deep denitrification system and process for high ammonia nitrogen sewage. Background technique [0002] At present, with the strengthening of environmental protection awareness, the strengthening of environmental pollution control and the development of environmental protection technology, water pollution has been relatively effectively controlled initially. However, the standard discharge of high-ammonia-nitrogen wastewater common in industrial production is still an urgent problem. The problem. High ammonia nitrogen wastewater mainly comes from chemical fertilizer, petrochemical, aquaculture, garbage treatment and other industries. In terms of high ammonia nitrogen wastewater treatment, it is not only necessary to pursue the technical indicators of efficient denitrification, but also to consider reducing energy consumption, sa...

AI Technical Summary

Problems solved by technology

The traditional oxidation ditch process mainly uses the inhomogeneity of dissolved oxygen distribution in the ditch, and through reasonable design, it can generate alternate cycles of aerobic zone and anoxic zone in the ditch, so as to achieve the purpose of denitrification. Its biggest advantage is The removal of organic matter and total nitrogen can be achieved in the same ditch without the need for an external carbon source, but the disadvantages are also obvious. It is difficult to accurately control the respective volumes and dissolved oxygen concentrations of the aerobic zone and the anoxic zone in the same ditch. Therefore, the effect on nitrogen removal is limited

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