污泥厌氧发酵液燃料电池的性能及电子供体分析

发布时间：2018-03-26 05:21

本文选题：微生物燃料电池　切入点：剩余污泥　出处：《中国环境科学》2015年12期

【摘要】：采用剩余污泥厌氧发酵液为阳极燃料、铁氰化钾溶液为阴极电子受体,成功启动了双室微生物燃料电池(WC)考察了厌氧发酵过程中剩余污泥上清液中各种挥发性脂肪酸(VFAs)含量的变化,研究分析了污泥厌氧发酵液燃料电池的产电过程、燃料消耗及电子供体.结果表明,污泥厌氧发酵液中乙酸含量最高(约占总VFAs的50%),异戊酸和丙酸含量次之(分别约占总VFAs的18%及15%),正丁酸和异丁酸含量较少(均低于总VFAs的10%),正戊酸含量最低(低于总VFAs的1%);MFC实现了250h稳定电压输出(0.65±0.05V),库伦效率为9.09%;阳极总化学需氧量(TCOD),溶解性化学需氧量(SCOD),VFAs均呈现整体下降趋势,TCOD和SCOD的去除率分别为74.9%和86.4%;VFAs的完全消耗伴随着反应器产电性能迅速变差,表明VFAs是主要电子供体;在MFC产电过程中,VFAs的消耗与产生同时存在,消耗总体快于产生;各种VFAs消耗快慢依次为:乙酸正丁酸丙酸正戊酸异戊酸异丁酸.
[Abstract]:The anaerobic fermentation broth of excess sludge was used as anode fuel, and potassium ferricyanide solution was used as cathode electron receptor. The changes of volatile fatty acids (VFASs) in excess sludge supernatant during anaerobic fermentation were investigated by starting a two-chamber microbial fuel cell successfully, and the process of producing electricity from sludge anaerobic fermentation liquid fuel cell was analyzed. Fuel consumption and electronic donors. Results show that. The content of acetic acid in anaerobic fermentation broth of sludge was the highest (about 50% of total VFAs, followed by isovaleric acid and propionic acid) (about 18% and 15% of total VFAs, respectively), the content of n-butyric acid and isobutyric acid was lower (both lower than the total VFAs of 10%), and the content of n-valerate was the lowest (low). The 250h steady voltage output is 0.65 卤0.05V ~ (-1) and the Coulomb efficiency is 9.09. The total anodic chemical oxygen demand (TCOD) and dissolved chemical oxygen demand (VFAs) have all shown an overall downward trend. The removal rates of TCOD and SCOD are 74.9% and 86.4% respectively, which are accompanied by the complete consumption of VFAs. The electrical performance of the reactor becomes worse rapidly, The results showed that VFAs was the main electron donor, the consumption and production of MFC existed simultaneously, and the consumption of VFAs was faster than that of production, and the order of consumption of VFAs was n butyrate propionate propionate isovalerate isobutyric acid.
【作者单位】：同济大学环境科学与工程学院污染控制与资源化国家重点实验室;上海城市管理职业技术学院土木工程与交通学院;
【基金】：国家科技支撑计划课题(2013BAD21B03) 同济大学“盛云飞大学生科技创新实践基金”资助课题
【分类号】：X703;TM911.45

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