Life Cycle Assessment Of The Utilization Of Kitchen Waste To Produce Biogas For Power Generation

With the development of society,people's demand for electricity is increasing.At present,biomass power generation,wind power,Hydropower,nuclear power and other environment-friendly power generation account for only a small part.The power generation mode is still dominated by thermal power generation.As a result,the use of primary energy,such as coal,oil and natural gas,is increasing,the amount of pollutants produced is also increasing and the environment is deteriorating seriously.Against the background,this article relies on the Nanning scientific research and technology development project.The life cycle of biogas generation from kitchen waste was studied.The main research work of this subject is as follows:First,the current environmental problems are analyzed.The characteristics and treatment methods of food waste are introduced.The biochemical process of biogas fermentation from kitchen waste was described.And a large number of examples of biomass power generation domestic and foreign are studied.Combined with the energy and environmental protection problems faced by our country,the significance of developing kitchen waste recycling project was expounded.Second,relying on the example of Nanning scientific research project"Research on Kitchen Waste Recycling and Resource Technology".According to the life cycle assessment method,the evaluation model of kitchen waste power generation was established.Through on-site investigation and reading a large number of references,the list of kitchen waste power generation was determined.Third,the environmental emissions and energy consumption of all aspects of life cycle of kitchen waste generation were calculated.The results show that:the energy consumption of kitchen waste power generation life cycle only accounts for 24.69%of traditional thermal power generation.Other environmental emissions are also lower than traditional thermal power generation at varying degrees.Fourth,the effects of the lifecycle of kitchen waste power generation on energy consumption,global warming and acidification were studied.In addition,the weights of various types of environmental impacts were determined by the combination of AHP and entropy weight method.The results show that:the effects of kitchen waste generation on various types of environment are better than traditional thermal power generation.Finally,through sensitivity test.The conclusions show that:When the biogas content reaches 60%,the environmental impact is 16.43%lower than that of 55%biogas content.When the biogas content reaches 70%,the environmental impact is reduced by 25%.