How to properly handle the power plant ash and flue gas generated by biomass combustion power generation to avoid damage to the ecological environment is the current technical problems.China's scientists found that chlorella can plant ash and flue gas nitrogen oxides, Carbon dioxide as 'food', and proposed a biomass power plant waste recycling comprehensive recycling technology strategy.
Reporter learned from the Institute of Hydrobiology, Chinese Academy of Sciences, the Institute of Qiangqiang Chlorella materials used to study the bio-emission reduction of nitrogen oxides for industrial flue gas, the mechanism of action and carbon / nitrogen (C / N) Metabolic balance, and based on these studies, further evaluated the feasibility of producing chlorella by using power plant ash and flue gas generated from biomass power plants as nutrient sources.
They found that when plant ash was incorporated into the culture medium for nutrient use and carbon dioxide in the flue gas was used to enhance the photosynthesis of the cells, chlorella cells were eventually increased by 39% and 35%, respectively, over the chlorella cultured in conventional media % Of fat and biomass productivity Chlorella cells while reducing nitrogen oxides and carbon dioxide in the flue gas concentration to achieve nearly 100% efficiency of nitrogen oxide denitrification and maximum 0.46 g / dl of CO 2Removal rate.At the end of cultivation, the maximum processing efficiency of power plant ash is 13.33 g / dL, and there is almost no residual nutrients in the residual medium, which can be safely discharged or recycled for continuous microalgae cultivation or farmland watering.
Based on these results, Wang Qiang's group proposed a recycling economy technical strategy for comprehensive treatment of biomass power plant waste by using industrial waste released during the power generation of biomass power plants as nutrients for microalgae culture while producing bio-oil And other high value-added products to achieve the production of negative carbon bioenergy with economic, social and environmental benefits.
Related papers have been published online in the International Energy Journal "Energy Applications".
