Three-dimensional electrode bio-membrane system used for processing high-ammonium-nitrogen wastewater with low carbon-nitrogen ratio

Abstract

The invention discloses a three-dimensional electrode bio-membrane system used for processing high-ammonium-nitrogen wastewater with a low carbon-nitrogen ratio. According to the invention, a barrier membrane concentric with a reactor body is arranged in the reactor body; with the barrier membrane, the reactor body is separated into a round anode zone and an annular cathode zone; a microbe carrier filling material is filled in the anode zone, and a positive electrode is arranged at the center of the anode zone; a negative electrode is arranged in the cathode zone, and conductive particles arefilled in the cathode zone, wherein the conductive particles serve as a third electrode; the negative electrode and the conductive particles both serve as microbe carriers; a water inlet pipe is arranged on the bottom of the anode zone, and a water outlet pipe is arranged in the cathode zone; the water outlet pipe is arranged on an outer wall on the upper end of the reactor body. According to theinvention, in a same electrode bio-membrane reactor, an eligible environment for the microbes is created with an electrochemical effect; an electron acceptor and an electron donor are respectively provided, such that nitrification and denitrification actions are respectively carried out, and ammonium-nitrogen wastewater can be effectively treated. The system is advantaged in low energy consumption, high efficiency, simple structure, and easy operation.

Description

technical field [0001] The invention relates to a wastewater treatment system, specifically a three-dimensional electrode biofilm system suitable for treating wastewater with a low carbon-to-nitrogen ratio and high ammonia-nitrogen ratio, and belongs to the technical field of water treatment. This system combines biofilm method and electrochemical method in the same reactor to complete the whole process of nitrification and denitrification treatment of wastewater with low carbon-to-nitrogen ratio and high ammonia-nitrogen. [0002] Background technique [0003] With the development of industrial and agricultural production and the improvement of urbanization in my country, the discharge of urban sewage has increased rapidly. A large number of untreated or treated urban sewage whose effluent nitrogen and phosphorus are still difficult to meet the standards are discharged into urban lakes and rivers, causing nitrogen and phosphorus pollution in water bodies. It is becoming mor...

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Problems solved by technology

[0007] At present, the electrode biofilm method is mostly aimed at the removal of nitrate in water, and it is still rare to apply this method to the treatment of wastewater with low carbon-to-nitrogen ratio and high ammonia-nitrogen

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