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中温干式发酵对互花米草产气和结构特性的影响 被引量:3

EFFECT OF MESOPHILIC DRY DIGESTION ON CHARACTERISTICS OF BIOGAS PRODUCTION AND STRUCTURE OF SMOOTH CORDGRASS
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摘要 利用渗滤床中温、干式发酵互花米草,考察其技术可行性和产气特性;通过元素分析、XRD和FT-IR分析,考察干式发酵及石灰堆沤预处理后互花米草物化性质的变化.研究结果表明,中温、干式发酵互花米草在技术上是可行的,60d单位累积产气量为178.4 mL.g-1VS(0℃,1.01×105Pa),总TS与VS去除率分别为59.30%和60.11%;互花米草的纤维结晶体为纤维素Ⅰ型,预处理和厌氧发酵未改变纤维素的晶型,但结晶指数在预处理后降低了15.42%;由红外光谱可知,预处理使聚糖解聚与木质素结构改变;发酵主要使聚糖进一步的解聚、降解. The characteristics of biogas production from mesophilic dry digestion of smooth cordgrass(SC) in leaching bed reactor were investigated,and the changes of the chemical composition,crystalline structure and chemical structure of untreated and treated SC were examined by the chemical analysis,X-ray and FT-IR analysis during compost and digestion.The results showed that mesophilic dry digestion of SC was technically feasible and the cumulative biogas yield added up to 178.4 mL·g^-1VS(0 ℃,1.01×10^5 Pa) during 60d dry digestion.XRD results confirmed that the crystalline structure of SC fibre was celluloseⅠwhich did not change after compost pretreatment and dry digestion,but crystalllinity index of cellulose decreased 15.42% after pretreatment.The results of FT-IR spectroscopy study showed that the depolymerization and degradation of polysaccharides and the modification of lignin structure occurred during pretreatment and dry digestion.
出处 《环境化学》 CAS CSCD 北大核心 2011年第3期679-685,共7页 Environmental Chemistry
基金 十一·五太湖水专项,“复合污染型入湖河流武进港及小流域污染控制技术与工程示范”(2008ZX07101-004)资助
关键词 互花米草 干式发酵 产气特性 结构变化 smooth cordgrass dry digestion producing biogas characteristics structure change
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