厨余垃圾填埋产气过程实验模拟研究

Study on landfill gas (LFG) generation pattern plays an important role in rational prediction of the LFG generation quantity and recovery of LFG. In this paper, the experiment of the generation process of landfill gas from kitchen waste was conducted in simulated anaerobic reactor for the kitchen waste is a major component of domestic refuse in China. Cumulative LFG production and LFG production rate, and pH value, chemical oxygen demand (COD), volatile fatty acids (VFA) concentrations were regularly monitored; results show the variation pattern of them with time. A theoretical model of landfill gas (LFG) generation was derived based on the gas generation pattern. With this model, through parameter identification by optimizing method of gradient approach and experimental fitting, the featured parameters of landfill gas generation from kitchen waste were obtained.