Device and method for efficiently treating wastewater

Abstract

The invention discloses a device and a method for efficiently treating wastewater, and belongs to the field of technologies for treating water. The device sequentially comprises an MBBR (moving bed bio-membrane reactor) reaction zone, a solid-phase carbon source zone, a denitrification filter zone and a buffer zone which are integrally constructed to form the device. Various reaction zones are of multilevel plug-flow type structures, so that the impact load resistance of systems can be enhanced. A water inlet and a water outlet are formed in the device, an exhaust port is arranged on the device, and the water inlet is connected with the MBBR reaction zone; the water outlet and the exhaust port are communicated with the buffer zone; the solid-phase carbon source zone is sequentially filled with biomass distiller's grain layers and a retinervus luffae fructus layer; the wastewater can be efficiently deeply treated by the denitrification filter zone. MBBR technologies and denitrification filter technologies are simultaneously combined in the reaction device, running conditions are controlled, and accordingly the wastewater can be efficiently treated by the aid of natural biomass solid-phase carbon sources. Compared with the traditional processes for treating wastewater, the device and the method have the advantages of high nitrogen and carbon removal efficiency, convenience in maintenance and management and low energy consumption.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a high-efficiency wastewater treatment device and a treatment method. Background technique [0002] The economical and efficient removal of carbon and nitrogen in wastewater is a common key issue in wastewater treatment engineering. Moving bed biofilm reactor (MBBR) is an efficient wastewater biological treatment process, which can effectively remove COD, ammonia nitrogen and other pollutants in wastewater, and has been widely used in recent years. However, the effluent treated by the MBBR process often contains a relatively high concentration of nitrate, which is difficult to meet the requirements for total nitrogen in the first-level A standard of the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002). Nitrate is removed in depth, so it is particularly important to develop a high-efficiency wastewater treatment device and treatment method ...

AI Technical Summary

Problems solved by technology

However, the effluent treated by the MBBR process often contains a relatively high concentration of nitrate, which is difficult to meet the requirements for total nitrogen in the first-level A standard of the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002). Nitrate is removed in depth, so it is particularly important to develop a high-efficiency wastewater treatment device and treatment method based on MBBR

[0003] Chinese invention patent 201110188972.4 discloses an integrated treatment device for industrial wastewater treatment. This device solves the shortcomings of traditional treatment systems that occupy a large area by integrating primary sedimentation tanks, hydrolytic acidification tanks and aerobic tanks. The device is still unable to perform advanced treatment of nitrate in wastewater

Chinese invention patent 200510044033.7 discloses an integrated wastewater treatment device and treatment method. The device organically combines electrochemical treatment and biological treatment, and electrochemistry is used as pretreatment to remove biologically harmful substances and refractory substances, improving wastewater treatment. The B / C ratio also promotes the subsequent membrane biological treatment, but the device uses an electrochemical process, which requires an additional increase in electricity costs, and at the same time, the reaction is difficult to control due to heat generation

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