可溶性微生物产物对偶氮染料废水脱色及产电性能的影响  

The effect of soluble microbial product on the decoloration and concomitant electricity recovery of azodye-containing wastewater

作　　者：朱超[1] 解井坤[1] 王媛[1] 易维洁[2] 

机构地区：[1]陕西科技大学资源与环境学院,陕西西安710021 [2]贵州大学农学院,贵州贵阳550025

出　　处：《陕西科技大学学报（自然科学版）》2015年第1期36-41,共6页Journal of Shaanxi University of Science & Technology

基　　金：陕西省教育厅专项科研计划项目(2013JK072);陕西科技大学博士科研启动基金项目(BJ12-29)

摘　　要：可溶性微生物产物(Soluble Microbial Product,SMP)是活性污泥污水处理体系中的微生物的重要代谢产物,是污泥絮体形成以及保证体系稳定运行的关键因素之一.本文对CASS和A2O工艺产生的脱水污泥进行了好氧和厌氧培养,提取了SMP和胞外聚合物(Extracellular Polymeric Substances,EPS),表征并探究了两者对含偶氮染料废水的微生物燃料电池产电性能的影响,以及对脱色效率的改善情况.红外分析表明,不同工艺和培养方法得到的SMP和EPS的成分构成相似度很高;PACl沉降试验表明,SMP中的大分子物质含量普遍低于EPS.SMP和EPS均可提升微生物燃料电池的电压,最高可达130mV,且两者均可提高偶氮染料的脱色率,最高可达93%.这些研究表明SMP和EPS有作为染料废水产电资源化助剂的价值.Soluble microbial product（SMP）,being an important metabolite of the microbes in activated sludge system of wastewater treatment,plays an essential role in the formation of sludge flocs and the stable operation of treatment system.The characteristics of SMP and extracellular polymeric substances（EPS）from the sludge of Cyclic Activated Sludge System（CASS）and Anaeroxic-Anoxic-Oxic（A2O）treatment processes,cultured anaerobically and aerobically,were investigated after long-term（60days）cultivation and used for the enhancement of the electricity generation and decoloring rate of the microbial fuel cell（MFC）to treat azodye-containing wastewater.The results showed that the SMP and EPS from different processes and cultivating methods were of high similarity in composition while the EPS had higher content of macromolecular substances than that in SMP according to the data of PACL sedimentation test.Both SMP and EPS were confirmed to be effective in enhancing the voltage to its peak value of 130 mV and the decoloring rate to 93%of the MFC for azodye-containing wastewater.The present study suggests that EPS and SMP are of valuable as auxiliary in the electricity reclamation from azodye-containing wastewater treatment.

关 键 词：可溶性微生物产物 胞外聚合物 偶氮染料 微生物燃料电池 

分 类 号：X172[环境科学与工程—环境科学]