Algal fungi synergistic ecological type microbial fuel cell and method for generating electricity by utilizing water purification

Abstract

The invention discloses an algal fungi synergistic ecological type microbial fuel cell and a method for generating electricity by utilizing water purification. The fuel cell consists of a fuel cell body, a water inlet distribution system, an anaerobic reaction area, a wetland ecological anode area and an algal fungi symbiotic cathode area. A cation exchange resin is added into a matrix, straw biological carbon is adopted in the wetland matrix, the conductivity is improved, and the internal resistance is reduced; an algal ecological cathode is constructed, and energy conservation and low carbon are realized; and moreover, a deep anaerobic zone is increased on the lower layer of the anode area and adapts to sewage feeding of high-concentration COD, the height of the cell body is increased, and the electrical activity of the cell is improved. The ecological wetland and the microbial fuel cell are combined, a wetland ecological anode and an algal fungi symbiotic oxygen-releasing ecological cathode are constructed, the ecological type microbial fuel cell is formed, and sewage treatment and energy recycling are realized.

Description

technical field [0001] The invention belongs to the field of environmental protection and clean energy, and relates to a synchronous recovery energy device for treating sewage by using an algae-bacteria collaborative ecosystem and a method for producing electricity by using the water purification. Background technique [0002] Microbial fuel cells are a special class of fuel cells. It follows the principle of bioelectrochemistry, uses microorganisms to degrade organic pollutants in sewage, and at the same time converts chemical energy in pollutants into electrical energy. In addition to theoretically high energy conversion efficiency, there are other fuel cells that do not Some characteristics: wide range of raw materials, can use a variety of organic matter that cannot be used by general fuel cells, even organic matter in sewage; mild operating conditions, generally work under normal temperature, normal pressure, and neutral conditions, which makes the battery safe and effi...

AI Technical Summary

Problems solved by technology

[0008] 1. Although the structure is simple, it has not realized the dual ecological structure of anode and cathode, and the efficiency is low. The oxygenation type needs to consume energy to provide dissolved oxygen, and cannot effectively recover CO 2 ;

[0009] 2. Large internal resistance: For non-membrane wetland sediment fuel cells, due to the slow diffusion rate of cations (protons) generated in the internal circuit in the wetland matrix, the diffusion internal resistance is large, forming a large concentration polarization, resulting in battery efficiency low

[0010] 3. Poor ability to resist high-concentration organic matter impact load: due to the use of wetland plants to build biofuel cells, wetland plants have limited tolerance to organic pollutants. When the COD (organic matter concentration) concentration is greater than 1000mg / L, even if the pollution resistance is strong the reeds will die

[0011] 4. Low production capacity: the concentration of organic matter in the influent is limited, the COD concentration is lower than 1000mg / L, and there is no deep anaerobic coordination in the bioanode, which is conducive to the concentration of small molecule monosaccharides, acetic acid, formic acid and other organic matter that are used as substrates for electrogenic bacteria low, which will inevitably lead to low productivity

[0013] 1. The conductivity of wetland matrix materials is poor, which affects the diffusion of protons in the matrix, resulting in large internal resistance and low battery efficiency;

[0014] 2. The cathode of the battery is a non-ecological type, or a single type of flora. The oxygen source of the cathode is natural dissolved oxygen or artificial oxygenation, and the algae microbial flora is not used to achieve photosynthesis and oxygen production;

[0015] 3. There is no strict anaerobic area coordination, and the COD concentration of the influent should not be too high, otherwise it will inhibit the growth of wetland plants and even cause plant death. Due to the low COD concentration, it also limits the nutrient source of electricity-producing bacteria and electricity production efficiency Low

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