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w methane fermentation technology research for straw the key influence factors in the process of fermentation to produce biogas were studied impacted on the different conditions of biogas production rate are measured, recorded and analyze the data according to the data, summarized the optimum pretreatment conditions and fermentation conditions cassava ethanol production technology ** ** college studentsamp。39。 summer program participated in job shell college students summer research program, sponsored by the national total of 35 teams went to guangxi for onthespot investigation, the research of preparing cassava fuel ethanol technology studyed to obtain better persuasive data, and the relevant papers to write qiaobu international energy equipment co., ltd ** ** designing manager in view of the agriculture and forestry waste and the thermochemical conversion of urban solid waste system research and development a