Principle and Application of Electro-Fermentation Technology for Enhancing the Resource Utilization of Organic Waste
The increasing production of organic waste poses a challenge for waste treatment and disposal.Due to the richness of nutrients such as polysaccharides,proteins and minerals,the bio-resourcing of organic waste has attracted much attention.Currently,the traditional anaerobic fermentation system for organic waste treatment has problems such as long fermentation period,low product yield,poor product selectivity,and low degradation rate of organic waste.The Bio-electro-fermentation technology formed by applying electrochemical system to the traditional anaerobic fermentation system can regulate the redox balance of microbial reaction by electrochemical methods,overcome the thermodynamic limitations of traditional fermentation,strengthen the microbial electron transfer,promote the degradation of organic wastes and the generation of resource products,and achieve the high efficiency of organic waste resourcing.In this paper,we systematically investigate the basic principles of electro-fermentation technology to promote organic waste resources,review the electrode materials,microorganisms,reactor structure,and methods to enhance the operation of the system,introduce the current research status of electro-fermentation technology to strengthen the generation of organic waste resource products(including methane,hydrogen,alcohols,short-chain fatty acids,medium-chain fatty acids,polyhydroxybutyrate,polyhydroxyalkanoate,etc.),summarize and look forward to the prospects and challenges for the development of electro-fermentation technology in the application of organic waste resource utilization.
electro-fermentation technologyorganic wasteelectrode materialelectroactive bacteriaelectro-fermentation productsextracellular electron transferhigh value chemicals
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