As long as the structure of the cells is modified, the electric energy microbial 'power generation enthusiasm' will be soaring, the efficiency will double, and more garbage will be swallowed and turned into waste. Recently, the new issue of Nature·Communication magazine published online Tianjin University. The latest research results of the team of Professor Song Hao from the School of Chemical Engineering. This research has solved the important scientific problems in the field of microbial electrochemistry. In order to improve the extracellular electron transfer efficiency of electric energy microbial cells, the electric cell microbial 'turn waste into treasure' industrialization The application provides a feasible idea.
According to reports, the microbial electrocatalysis process is a two-way electron and energy exchange process between electric energy cells and the external environment by means of cell charge and discharge. It has broad application prospects in the fields of energy, environment, chemical industry, military, etc. This process can realize the field of environmental energy. 'Turn waste into treasure' applications, such as microbial fuel cells that promote the degradation of organic waste and electrical energy, microbial electrolysis cells for the treatment of waste water from animal husbandry, brewing and food processing industries, for the reduction of carbon dioxide, synthesis of high-addition Microbial electrosynthesis of fine chemicals, etc.
Microbial electrocatalytic systems (microbial electricity generation, microbial electrosynthesis, microbial unbalanced electro-fermentation, etc.) led by electric energy cells are emerging as a new type of green new energy production. Currently, cell electron transfer efficiency is too low and becomes a limitation. The biggest bottleneck in the application of electric energy cell microbial industrialization. How to use electric energy cells to generate electricity with high efficiency has become a problem that scientists can't wait to solve. Song Hao team used the synthetic biology modular engineering cell strategy to systemize Shiva bacteria. Metabolic optimization and remodeling, transforming its genetics. 'We found that the capacity of the 'electron pool' in the electric energy cell is a key factor limiting the rate of extracellular electron transport. 'Song Hao compares the cell's electronic carrier NAD+ to the inside of the cell. 'Battery', its capacity directly affects the cell's electricity production efficiency. The experiment also proves that by increasing the total amount of intracellular electron carrier NAD+, and enhancing the substrate consumption rate, the cell electron transfer rate can be significantly increased, which in turn can stimulate the electric energy cell microbe. Efficiently 'work'.
