Method for improving electron transfer efficiency of flora in situ

Abstract

The invention provides a method for improving the electron transfer efficiency of a flora in situ, which is suitable for wastewater treatment of a three-dimensional electro-catalysis biological membrane system. The method comprises the following steps: firstly, constructing a three-dimensional electro-catalysis biological membrane system to culture an electro-active microbial membrane with target pollutant degradation capacity, then periodically regulating and controlling the electric field intensity to selectively enrich the electro-active microbial membrane, and finally, introducing low-concentration metal ion wastewater according to a certain flow ratio and controlling the current density. And nano-particles are synthesized in situ inside or on the surfaces of the microorganisms on the main electrode and the particle electrode. The biomineralization synthesized nanoparticles are tightly combined with cell membranes and periplasmic space, idle and dead electron conduits are connected, the electron transfer efficiency between organisms and electron acceptors and between organisms and non-biological interfaces is improved, the electron transfer process is improved, the current utilization efficiency of a three-dimensional electro-catalysis biological membrane system is further improved, and the service life of the three-dimensional electro-catalysis biological membrane system is prolonged. The treatment energy consumption is reduced; and pollutants can be efficiently degraded.

Description

technical field [0001] The invention belongs to the field of water treatment and provides an in-situ method for improving the electron transfer efficiency of bacterial groups, which is suitable for wastewater treatment by a three-dimensional electrocatalytic biofilm system. Background technique [0002] The three-dimensional electrocatalytic biofilm system has been applied to the treatment of organic and heavy metal ions and other wastewater. However, the current three-dimensional electrocatalytic biofilm system still has problems such as low current utilization rate and high energy consumption. An important factor for the efficient operation of a membrane system. [0003] Electroactive microorganisms transfer electrons generated by intracellular oxidative electron donors to extracellular electron acceptors or take up electrons through specific respiratory chains, reducing the power of cathode electrodes to save energy or maintain their metabolic activity. These processes ar...

AI Technical Summary

Problems solved by technology

[0002] The three-dimensional electrocatalytic biofilm system has been applied to treat wastewater such as organic and heavy metal ions, but the current three-dimensional electrocatalytic biofilm system still has problems such as low current utilization rate and high energy consumption. An important factor for the efficient operation of the membrane system

Sewage and wastewater containing metal ions are currently mainly used to remove and recover metal ions from sewage through various treatment technologies, and the treatment steps are complicated.

Studies have shown that some microorganisms such as G.sulfurreducens PCA, Shewanella sp., etc. can mineralize heavy metal ions to form sediments or nanoparticles, which can accelerate the formation of electroactive microorganisms to form electroactive biofilms, but the use of them in sewage treatment is still relatively limited. few