摘要
在有机质厌氧产甲烷过程中,短链脂肪酸的高效转化是关键步骤之一,而铁氧化物对短链脂肪酸的转化具有强化作用。本文以针铁矿和丙酸钠为代表,考察了铁氧化物添加量(40、200、2000 mg/L)对短链脂肪酸产甲烷过程的影响。结果表明,最高产甲烷效率(89.65%)及最大产甲烷速率(9.95 mL/d)分别发生在40 mg/L针铁矿和2000 mg/L针铁矿的体系中,微生物群落分析表明产乙酸细菌Petrimonas属与乙酸裂解型产甲烷菌Methanothrix属为优势菌种。添加针铁矿可促进丙酸钠产甲烷过程,其转化途径以乙酸裂解耦合种间直接电子传递为主。
High efficient transformation of short-chain fatty acids is one of the key steps in the anaerobic methanogenic process of organic matters.The transformation of short-chain fatty acids can be enhanced by iron oxides.In this paper,the influence of iron oxide dosages of 40、200、2000 mg/L on the anerobic methanogenic process of short-chain fatty acids has been investigated using the goethite and sodium propionate as representatives of the iron oxide and short-chain fatty acid,respectively.The results show that the maximum methane yield of 89.65%was obtained in the system with the goethite dosage of 40 mg/L,but the maximum methane production rate of 9.95 mL/d was obtained in the system with the goethite dosage of 2000 mg/L.Microbial community analytical results show that the Petrimonas genus of acetic acid-producing bacteria and the Methanothrix genus of acetoclastic methaneogenic archaea are dominant in the systems.The dddition of goethite has promoted the anaerobic methanogenic process of short-chain fatty acids by sodium propionate with transformation way of the predominant direct electron transfer between coupled species of acetoclastic methanogenic bacteria.
作者
钟成
王进
徐诚
黄纷
陈琪
陈天虎
岳正波
ZHONG Cheng;WANG Jin;XU Cheng;HUANG Fen;CHEN Qi;CHEN Tian-hu;YUE Zheng-bo(School of Resources and Environmental Engineering,Heifei University of Technology,Hefei 230009,China)
出处
《矿物岩石地球化学通报》
CAS
CSCD
北大核心
2019年第5期961-965,共5页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家自然科学基金项目(41572326)
关键词
针铁矿
丙酸钠
厌氧消化
微生物
甲烷
goethite
sodium propionate
anaerobic digestion
microorganism
methane
