Artificial wetland microbial fuel cell sewage treatment device

Abstract

The invention discloses a light energy reinforced phosphorus recovery electrolytic bath-artificial wetland microbial fuel cell sewage treatment device. The light energy reinforced phosphorus recovery electrolytic bath-artificial wetland microbial fuel cell sewage treatment device comprises an inflow water distribution tank, a phosphorus recovery electrolytic tank, an artificial wetland-microbial fuel cell, an outflow water collection tank, a light energy acquisition system and an electric energy management system. The light energy reinforced phosphorus recovery electrolytic bath-artificial wetland microbial fuel cell sewage treatment device converts light energy / biomass energy into electric energy, the electric energy is stored and distributed to the phosphorus recovery electrolytic bath through the electric energy management system, magnesium ions are slowly released by an anode of the electrolytic bath, magnesium ammonium phosphate crystals are separated out by a cathode of the electrolytic bath, and phosphorus in sewage is recovered. Meanwhile, the pollutant removal effect is improved. According to the invention, the problems of poor pollutant removal effect and incapability of recycling phosphorus resources in the traditional artificial wetland are solved, and a novel sewage treatment technology with zero energy consumption, high efficiency and environmental friendliness is formed.

Description

technical field [0001] The invention relates to a light energy enhanced phosphorus recovery electrolyzer-constructed wetland microbial fuel cell sewage treatment device and method, belonging to the technical fields of constructed wetland technology and sewage treatment. Background technique [0002] Constructed wetland is a sewage treatment technology that strengthens its purification ability through artificial construction and management control based on the principle of natural wetland purification of sewage. It is a complex system composed of substrates, plants, water bodies, microorganisms and animals. For phosphorus compounds, traditional constructed wetlands mainly remove them through matrix adsorption, precipitation, and plant absorption. Due to the limited adsorption capacity of the matrix and the limited plant biomass, the phosphorus removal rate of this type of constructed wetland gradually decreases after long-term operation. According to international research ...

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Problems solved by technology

[0003] At present, the recovery of phosphorus in constructed wetlands is mainly achieved by adding adsorbents with adsorption properties, such as the patent No. Effectively improve the removal rate of phosphorus compounds in constructed wetlands, but the phosphorus adsorbed on the solid adsorbent needs to be additionally desorbed and recovered, or recovered together with the adsorbent as a phosphorus fertilizer, resulting in the problem of high phosphorus recovery costs, which is not conducive to wide application

It is a feasible and efficient high-purity phosphorus recovery technology to create alkaline conditions at the cathode by electrochemical means to promote the crystallization of phosphorus. For example, the patent number is CN 111453837 A, and the patent name is "a synchronous sewage treatment and nitrogen Phosphorus recovery bioelectrochemical device", which realizes phosphorus recovery through the crystallization of nitrogen and phosphorus at the cathode of the electrochemical device; another type uses an electrochemical system combined with an ion exchange membrane to concentrate phosphorus-containing wastewater by electrodialysis, thereby realizing phosphorus recovery in sewage For example, the patent number is CN111747530 A, and the patent name is "Membrane Electrochemical Coupling Microbial Reactor System and Sewage Treatment Method", but these electrochemical phosphorus recovery systems require additional power supply, which has certain requirements for operation and management

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