Anaerobic microporous aerator oxidation ditch reactor and sewage treatment method

Abstract

The invention discloses an anaerobic microporous aerator oxidation ditch reactor and a sewage treatment method. The reactor comprises a plurality of treatment zones which are adjacent to and communicated with one another hydraulically, wherein the treatment zones comprise a hydrolysis zone, an anaerobic zone, an anoxic zone, an aerobic zone and a settling zone. Supernate return channels are formed between the settling zone and the hydrolysis zone for returning nitrate-containing supernate from the settling zone to the hydrolysis zone, and denitrification treatment is performed by using the action of denitrifying bacteria. The reactor integrates hydrolysis, anaerobic treatment, anoxic treatment, aerobic treatment and settling, thereby greatly saving floor area and reducing investment cost of infrastructure construction. The adopted internal and external return systems improve the utilization rate of the capacity of a pool, increase denitriding and dephosphorizing effects and reduce treatment cost.

Description

technical field [0001] The invention relates to a facility and method for treating urban domestic sewage, in particular to an anaerobic microporous aeration oxidation ditch reactor for meeting the requirements of deep denitrification and phosphorus removal and a method for sewage treatment using the reactor . Background technique [0002] In order to protect the water environment and reduce pollution, my country has increased the construction of urban sewage treatment plants in recent years. At present, the processes suitable for urban sewage treatment include mainstream technologies such as activated sludge process, SBR process and its variants, and oxidation ditch process. However, urban sewage treatment is also one of the industries with high energy consumption. High energy consumption leads to high operating costs of sewage treatment facilities, which is one of the important reasons for the failure of sewage treatment plants to operate normally. Therefore, the energy s...

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Problems solved by technology

[0009] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide an anaerobic microporous aeration oxidation ditch reactor and a sewage treatment method that can meet the increasing requirements of the urban sewage treatment industry for denitrification and phosphorus removal, so as to solve the current problem of oxidation The high investment and high operating costs of the nitrogen and phosphorus removal process commonly exist in the ditch process, so as to reduce the energy consumption of sewage treatment in the oxidation ditch process and improve the efficiency of nitrogen and phosphorus removal in the process

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