A photocatalytic coupled autotrophic denitrification reactor

Abstract

The invention provides a photocatalysis-autotrophic denitrification coupled reactor, comprising an LED visible light source, an anode chamber and a cathode chamber, wherein the anode chamber and the cathode chamber are separated by a proton membrane; a vertical photoelectric anode plate coated with a photocatalyst is arranged in the anode chamber; a side plate of the anode chamber is a light-transmitting plate; light can be projected onto the vertical photoelectric anode plate through the side plate so as to generate electrons and holes, and the holes can treat organic wastewater fed into theanode chamber; and a cathode plate loaded with denitrifying microorganisms is arranged in the cathode chamber, electrons generated by the anode plate are transmitted to the cathode plate through a wire and supplied to the denitrifying microorganisms for promotion of a denitrification reaction so as to realize treatment of high-nitrogen low-carbon wastewater fed into the cathode chamber. Accordingto the invention, photocatalysis and autotrophic denitrification technologies are coupled, so the degradation of organic wastewater difficult to biochemically degrade and efficient removal of nitratenitrogen under the condition of a low carbon-nitrogen ratio are synchronously completed under the condition that only light energy is consumed, no extra pollutants are generated in the reaction process, an organic matter electron donor is saved, and the reactor is simple in structure, low in cost, controllable in operation and high in practicability.

Description

Technical field: [0001] The invention belongs to the technical field of wastewater treatment, and relates to a photocatalytically coupled autotrophic denitrification reactor, in particular to a dual-chamber reactor device capable of synchronously and effectively degrading high-nitrogen and low-carbon wastewater and refractory organic wastewater. Background technique: [0002] In recent years, with the development of society and the improvement of people's living standards, the total amount of wastewater discharged into water bodies in my country has remained at a high level. According to the data released by the National Bureau of Statistics, the total amount of COD emissions in the country reached 10.2197 million tons in 2017, and total nitrogen emissions The volume reached 2.1646 million tons. A large amount of COD discharge can lead to the appearance of black and odorous water bodies, resulting in vicious cycle damage to river and lake ecosystems, and it is difficult to re...

AI Technical Summary

Problems solved by technology

However, for some organic wastewater with low biodegradability, it is difficult to achieve ideal results with a single biodegradation method

On the other hand, carbon source is an important factor in the biological denitrification process. Denitrifying bacteria use organic carbon as an electron donor to gradually convert nitrate nitrogen into nitrogen gas to achieve denitrification, but the lack of carbon source in the denitrification process is relatively Generally, it is usually necessary to add additional biochemical small molecule carbon sources to improve the denitrification efficiency, but this increases the cost of denitrification and increases energy consumption

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