微生物燃料电池型厌氧堆肥系统处理脱水污泥  

Treatment of dewater sludge by microbial fuel cell-anaerobic composting system

作　　者：于航[1] 姜珺秋[1] 赵庆良[1] 黄更 王琨[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090 [2]机械工业第九设计研究院有限公司,吉林长春130011

出　　处：《哈尔滨工程大学学报》2013年第8期1045-1051,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(51206036);哈尔滨市科技攻关基金资助项目(2010AA4CS024);中央高校基本科研业务费专项资金资助项目(HIT.NSRIF.201192)

摘　　要：针对脱水污泥厌氧堆肥周期长的问题，构建微生物燃料电池型厌氧堆肥系统（ microbial fuel cell-anaerobic com-posting， MFC-AnC），在厌氧堆肥（ anaerobic composting， AnC）的基础上利用生物产电加速污泥降解的同时回收电能．采用电化学方法考察MFC-AnC系统运行性能，系统运行35 d，获得开路电压0．84 V，最大功率密度5．3 mW/m3，内阻80Ω．通过对MFC-AnC系统运行期间污泥理化性质的分析发现，生物产电可促进AnC系统中污泥的减容效果，脱水污泥含水率由88％降至82．3％．MFC-AnC系统中脱水污泥SCOD含量高于AnC系统，VS/TS值略低于AnC系统，说明生物产电可以促进脱水污泥水解和对可生化降解有机物的利用，加速污泥的减量．系统运行15～20d，污泥中SCOD、溶解性碳水化合物和蛋白质溶出效果最好，VS的利用率最高，生物产电加速污泥有机物利用的效果最明显．With the problem of long cycle of dewatered sludge anaerobic composting ( AnC) technology, microbial fuel cell-Anaerobic composting ( MFC-AnC) system had been built, which utilized bioelectrogenesis to enhance the sludge degradation and power recovery simultaneously. This paper investigated the MFC-AnC system performance with dewatered sludge as substrate using electrochemical methods, which indicated that the working time was 35 d, the maximum power density of MFC-AnC system was 5.3 mW/m3, the open circuit potential (OCP) was 0.84 V and the internal resistance was 80Ωwith potassium ferricyanide as its electron acceptor. The physicochemical char-acteristic of sludge has been investigated during the whole operation period. The sludge water content of MFC-AnC system reduced from 88%to 82.3%, reflecting better volume reduction effect than AnC system. The result indicated that bioelectrogenesis could promote dewatered sludge water content decreasing. During the operation period, SCOD content in MFC-AnC system was higher than AnC system, and VS/TS value was lower, illustrating bioelectrogene-sis could enhance dewatered sludge hydrolysis ,organic matter biodegradation and accelerate sludge volume reduc-tion. During 15~20d of system uptime, SCOD content, soluble carbohydrate and protein in the sludge were dis-solved most, and VS utilization ratio was the highest, with the most obvious utilization effect of bioelectrogenesis en-hancing organic matter in dewatered sludge.

关 键 词：微生物燃料电池型厌氧堆肥系统( MFC-AnC) 脱水污泥 有机物降解 生物产电 

分 类 号：X705[环境科学与工程—环境工程] X382