Municipal sewage treatment plant deep treatment method and municipal sewage treatment plant deep treatment system

Abstract

The invention provides a municipal sewage treatment plant deep treatment method, which comprises: (1) introducing the two-stage treatment effluent of a municipal sewage treatment plant into a coagulation precipitation unit, adding a flocculating agent, and carrying out coagulation precipitation treatment; and (2) introducing the effluent of the coagulation precipitation unit after the coagulationprecipitation treatment into a deep filtering pool unit, adding a carbon source, and treating the sewage sequentially through the filtering layers of the deep filtering pool unit from top to bottom toremove total nitrogen, total phosphorus and SS from the sewage so as to complete the deep treatment of the two-stage treatment effluent of the municipal sewage treatment plant. The invention furtherprovides a municipal sewage treatment plant deep treatment system. With the method and the system of the present invention, the novel spherical granular fiber filtering material is used so as to effectively increase the filtration speed and reduce the occupation area of the equipment; and the spherical granular fiber filtering material has the large specific surface area and high biofilm area utilization rate, and can accelerate the sludge shedding during the backwashing so as to improve the backwashing efficiency.

Description

technical field [0001] The invention belongs to the field of waste water treatment, in particular to a method for advanced treatment in a municipal sewage treatment plant, and also relates to a system for advanced treatment in a municipal sewage treatment plant. Background technique [0002] The Ministry of Environmental Protection’s Announcement No. 21 of 2006 requires that starting from July 1, 2016, new urban sewage treatment plants will implement the first-level A standard of the "Pollutant Discharge Standards for Urban Wastewater Treatment Plants" (GB18918-2002); since January 2018 From the 1st, the existing urban sewage treatment plants in sensitive areas will implement the first-level A standard. The effluent of urban sewage treatment plants in some sensitive areas must meet the standard of surface IV water. Most of the municipal sewage treatment plants that have been built in China are designed according to the first-class B standard. Due to the high concentration ...

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Problems solved by technology

The source of the filter material of the V-type filter is simple, but the traditional filter material such as quartz sand has a large proportion, the porosity of the filter layer is low, and the filtration rate should not be too high. Increased, the overall equipment covers a larger area; the filter cloth filter realizes deep filtration, but backwashing is more frequent

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