天然气工业2017，Vol.37Issue(7)：132-138,7.DOI:10.3787/j.issn.1000-0976.2017.07.020
高压脉冲电场对杂交狼尾草厌氧发酵沼气产气率的影响
Effect of high-voltage pulsed electric field (HPEF) pretreatment on biogas production rates of hybrid Pennisetum by anaerobic fermentation
摘要
Abstract
In this paper,the raw materials of hybrid Pennisetum was pretreated in different conditions of high voltage pulsed electric field (HPEF) to improve its material utilization ratios and biogas production rates of anaerobic fermentation.Then,anaerobic digestion experiments were conducted within 32 days at moderate temperature (35 ℃) with TS mass fraction (6％),inoculation rate (20％) and initial pH (7.0).It is indicated that compared with the control group,9 groups of hybrid Pennisetum pretreated by HPEF are obviously superior in gas production efficiency of anaerobic fermentation,and higher in cumulative gas production,peak daily gas production and maximum methane concentration;that the most remarkable stimulation occurs in the HPEF condition of 15 kV/120 Hz/60 min,in that situation,the cumulative gas production in the fermentation period of 32 days is up to 9 587 mL,26.95％ higher than that of the control group,the peak daily gas production increases and the range of peak period extends.It is demonstrated that the optimal HPEF pretreatment time is 60 min and three HPEF parameters have a better effect on gas production in the order of voltage ＞ time ＞ frequency;and that the effect degree of treatment parameters on peak daily gas production is voltage,frequency and time in turn.It is concluded that HPEF can improve material utilization ratio and gas production rate of hybrid Pennisetum by anaerobic fermentation and shorten the gas production cycle.By virtue of this physical pretreatment method,the resource of Pennisetum is utilized sufficiently and the classes of energy plants are enlarged effectively.关键词
杂交狼尾草/厌氧发酵/高压脉冲电场(HPEF)/沼气/原料利用率/产气率/模型/促进作用Key words
Hybrid Pennisetum/Anaerobic fermentation/High voltage pulsed electric field (HPEF)/Biogas/Material utilization ratio/Gas generation rate/Model/Stimulation引用本文复制引用
王白娟,陈婷,秦向东,吴奇,赵艳,白顺星,彭文,冯博..高压脉冲电场对杂交狼尾草厌氧发酵沼气产气率的影响[J].天然气工业,2017,37(7):132-138,7.基金项目
国家自然科学基金项目(编号:61561054)、云南省高校生物天然气产业化技术工程研究中心建设项目. （编号:61561054）
