Device and method for treating municipal wastewater by adopting plug-flow type vertical multi-cycle technology

Abstract

The invention relates to a device and a method for treating municipal wastewater by adopting a plug-flow type vertical multi-cycle technology. The device comprises a municipal wastewater tank, a plug-flow type vertical multi-cycle aeration tank and a vertical-flow type sedimentation tank which are sequentially connected, a water outlet of the municipal wastewater tank is communicated with a water inlet in the bottom of one side of the plug-flow type vertical multi-cycle aeration tank, a water intake pump is arranged on the pipeline, a first overflow weir is arranged at the top of the other side of the plug-flow type vertical multi-cycle aeration tank, the first overflow weir is communicated with a water inlet of the vertical-flow type sedimentation tank, and a second overflow weir is arranged at the top of the vertical-flow type sedimentation tank. According to the device and the method which are provided by the invention, cycle and reaction tank height can be determined according to the actual demand of a project, and the design is flexible; and the space ratio of an anaerobic zone to an anoxic zone is improved, the removal of refractory organics is more facilitated, more denitrification environments are created at the same time, and the effect of improving denitrification capability of large-quantity low-carbon-nitrogen-ratio wastewater is obvious.

Description

Technical field [0001] The invention belongs to the technical field of sewage biological treatment, and specifically relates to a device for treating urban sewage with a push-flow vertical multi-circulation process. The invention also relates to a method for treating urban sewage with a push-flow vertical multi-circulation process. Background technique [0002] With the acceleration of social development and urbanization, urban sewage discharge is increasing. According to statistics, 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 reaches 79.9%. Urban sewage treatment is a high-energy-consuming industry, and data shows that the average electricity consumption value 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 ...

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Problems solved by technology

[0007] In order to achieve the above purpose, the present invention provides a device for treating urban sewage with a plug-flow vertical multi-circulation process, which solves the problems in the prior art that the denitrification ability of the reactor decreases, the refractory organic matter cannot be removed, the power consumption is large, and the water output is not good. compliance issues

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