Apparatus and method for treating municipal sewage through plug-flow vertical double-cycle technology

Abstract

The invention relates to an apparatus and a method for treating municipal sewage through a plug-flow vertical double-cycle technology. The apparatus comprises a municipal domestic sewage tank, a plug-flow vertical double-cycle aeration tank and a vertical flow precipitation tank which are sequentially connected, the plug-flow vertical double-cycle aeration tank is connected with a water inlet at the center of the top of the vertical flow precipitation tank through a pipeline, an overflow weir is arranged at one side of the upper portion of the vertical flow precipitation tank, a mud discharge tube is arranged at the bottom of the vertical flow precipitation tank, the municipal domestic sewage tank is connected with a water inlet at the bottom of the plug-flow vertical double-cycle aeration tank, a water feeding pump is arranged between the municipal domestic sewage tank and the water inlet at the bottom of the plug-flow vertical double-cycle aeration tank, and a water feeding tube is arranged at the water inlet at the bottom of the plug-flow vertical double-cycle aeration tank. The apparatus and the method increases the oxygen utilization rate, improves the organic matter removal rate by 5-10%, improves the ammonia nitrogen removal rate by 10-20%, and improves the total nitrogen removal rate by 20-30%.

Description

technical field [0001] The invention belongs to the technical field of sewage biological treatment, and in particular relates to a device for treating urban sewage by a push-flow vertical double-cycle process, and also relates to a method for treating urban sewage by a push-flow vertical double-cycle process. Background technique [0002] With the acceleration of social development and urbanization, the discharge of urban sewage is increasing day by day. According to statistics, only in the first quarter of 2014, a total of 3,622 urban sewage treatment plants were built in my country, with a daily sewage treatment capacity of 1.53×10 8 m 3 , The operating load rate reached 79.9%. Urban sewage treatment is a high energy-consuming industry, and the data shows that the average power consumption of urban sewage treatment plants reaches 0.285kWh / m 3 , the total power consumption accounts for 60% of the operating cost of the sewage plant, so reducing the energy consumption of s...

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Problems solved by technology

[0006] In order to achieve the above purpose, the present invention provides a device for treating urban sewage with a push-flow vertical double-circulation process, which solves the problems of complicated process, high ammonia nitrogen content, and high aeration energy consumption in the prior art

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