 |
In recent years, biomass power plants are becoming an important source of energy and electricity, and biomass fuels are a green renewable energy that does not affect the total atmospheric carbon dioxide balance.Copying energy from biomass can reduce the impact on fossil fuels and Energy imports rely on to reduce the damage to the environment, to achieve zero carbon emissions and improve the utilization of agricultural production waste.However, the use of biomass combustion power generation at the same time will generate ash and flue gas plant 'main component of CO 2And nitrogen oxides (NO x) And other pollutants, and the combustion of ash in the magnesium, potassium, calcium and other nutrient residues, the discharge of these pollutants on the ecological environment caused by damage, need to be treated before discharge safely. Through the cultivation of energy microalgae, you can Remove NOx and CO in flue gas 2, Remove residual inorganic elements in power plant ash, reduce environmental pollution, and can provide raw materials for biofuels to produce high value-added products.
WANG Qiang, Department of Hydrobiology, Chinese Academy of Sciences, Chlorella sp. C2 was used to study the effect of microalgae on industrial flue gas NO xOn the basis of this study, we further evaluated the feasibility of cultivating chlorella by using power plant ash and flue gas generated from biomass power plant as nutrient source.
The study found that when the power plant ash into the medium used as nutrients at the same time, the flue gas CO 2Enhanced the photosynthesis of Chlorella cells, resulting in a 39% and 35% increase in lipid and biomass productivity, respectively, over Chlorella vulgaris grown in conventional BG11 media.Chlorococcum cells grew while reducing NO x And CO2 concentration to achieve nearly 100% NOx denitration efficiency and maximum 0.46gL-1d-1 of CO 2After the cultivation, the maximum efficiency of power plant ash treatment is 13.33gL-1d-1, and there is almost no residual nutrients in the residual medium, which can be safely discharged or recycled for continuous microalgae culture or farmland watering. Based on these results, the group proposed for the first time a recycling economy and technology strategy for biomass power plant waste treatment (Figure), which is used to cultivate microalgae by using industrial waste released during the power generation of biomass power plants and simultaneously producing biological Fats and other high value-added products that enable the production of negative carbon bioenergy and bring economic, social and environmental benefits.
The research has been funded by the National Natural Science Foundation of China, the Natural Science Foundation of Hubei Province, the State Key Laboratory of Freshwater Ecology and Biotechnology, and the STS project of the Chinese Academy of Sciences.Related research results are based on Algal biofuel production coupled bioremediation of biomass power plant wastes based on Chlorella sp. C2 cultivation Posted online at Applied Energy.
