Photoelectrocatalysis coupled autotrophic denitrification microorganism nitrogen and phosphorus removal process method

Abstract

The invention discloses a photoelectrocatalysis coupled autotrophic denitrification microorganism nitrogen and phosphorus removal process method, and belongs to the technical field of sewage treatment. The method comprises the following steps: (1) adding a photocatalyst on cathode and anode reaction columns of a microbial electrochemical reactor, wherein the photocatalyst can degrade organic matters in domestic sewage into CO2 and H2O under natural light; (2) placing autotrophic denitrifying bacteria at the anode of the microbial electrochemical reactor, and placing algae at the cathode of themicrobial electrochemical reactor; and (3) injecting the domestic sewage into the microbial electrochemical reactor, and purifying the domestic sewage. A photocatalytic oxidation technology is combined with synchronous nitrogen and phosphorus removal of the algae, a light source is used for photosynthesis of the algae while a photocatalytic reaction is achieved, organic conversion of nitrogen andphosphorus is achieved, and the purpose of removing the nitrogen and phosphorus from the sewage is achieved.

Description

technical field [0001] The invention relates to a photoelectric catalysis coupling autotrophic denitrification microorganism denitrification and phosphorus removal process method, which belongs to the technical field of sewage treatment. Background technique [0002] Although my country's domestic sewage treatment industry in villages and towns has developed rapidly in recent years, it still faces many problems, mainly in the following four points: [0003] (1) The number of factories and stations is large, the distribution is strong, and the location is difficult; [0004] (2) There are large differences in water quality and quantity; [0005] (3) The standards are not clear and sound; [0006] (4) Part of the treatment facilities do not operate well, and the water quality is difficult to meet the standard. [0007] For distributed domestic sewage treatment equipment, COD and ammonia nitrogen can be removed through enhanced aeration. However, excessive dissolved oxygen w...

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a photoelectric catalytic coupling autotrophic denitrification microorganism denitrification and phosphorus removal process, which solves the traditional nitrogen removal method, which requires biological nitrification first and then heterotrophic denitrification. Adding organic matter such as methanol, ethanol, sodium acetate, etc. will not only increase the input of organic matter, but also generate more sludge in the system, increase the cost of operation and treatment, and may introduce new pollution problems