Low-energy and intelligent three-dimensional ecological internal circulation nitrification method and apparatus

Abstract

The invention relates to a low-energy and intelligent three-dimensional ecological internal circulation nitrification method and apparatus for upgrading and reconstruction of a sewage treatment system. A contact oxidation tank for sewage treatment is changed into a sedimentation tank. A solar power installation and wind driven generators are disposed for providing energy for system operation. The sedimentation tank is provided with at least one three-dimensional ecological internal circulation nitrification processing unit; each unit is divided into an ecological deodorization zone and a circulation nitrification reaction zone from top to bottom; each reaction zone is divided into an aerobic zone and a facultative sedimentation zone from inside to outside, and the aerobic zones are provided with aeration components. Flow rate, dissolved oxygen, temperature and sludge concentration in the tank during sewage treatment are controlled, so that the sewage can circularly flow for a plurality of times between the aerobic zone and the facultative sedimentation zone to form partial nitrification and denitrification for consuming endogenous carbon source. Finally, a supernatant flows out from a water outlet. The aeration power allows the sewage flowing circularly among every zone to realize circulating nitrification, so that pollutants can be effectively removed and the sewage can be discharged by meeting standard indexes such as deodorization, nitrogen and phosphorus removal and total nitrogen in upgrading and reconstruction of municipal sewage plants.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to the upgrading and transformation of sewage treatment systems, especially to an ecological purification treatment method with strict discharge indicators such as deodorization, phosphorus, denitrification and total nitrogen in the upgrading and transformation of urban sewage plants and the use of the method Apparatus designed by the method. Background technique [0002] The water pollution assessment results of key river basins in 2008 showed that 18.9% and 22.1% of the sections in key river basins had ammonia nitrogen exceeding the standard value of Class V, and ammonia nitrogen has exceeded the chemical oxygen demand (COD) and has become the primary indicator affecting the quality of surface water environment. In the national "Twelfth Five-Year" environmental protection plan, the types of total amount control of major pollutants will be added. During the "Twelfth Five-Year ...

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Problems solved by technology

[0012] At present, the treatment process adopted by the domestic urban sewage treatment system, the removal efficiency of ammonia nitrogen and total nitrogen is low, especially the removal efficiency of total nitrogen is generally lower than 80%. The upgrading and transformation of the treatment system is imperative, and there are two ways to upgrade and transform the sewage treatment system. One is to expand the capacity of the sewage treatment system, and the other is to develop high-efficiency new denitrification materials and to deodorize, dephosphorize, denitrify and total nitrogen. Efficient process, but it takes a certain amount of time and high manpower and material costs

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