The new biofilm-electrode method was used for the phenol degradation, because of its low current requirement. The biofilm-electrode reactor consisted of immobilized degrading bacteria on Ti electrode as cathode and Ti...The new biofilm-electrode method was used for the phenol degradation, because of its low current requirement. The biofilm-electrode reactor consisted of immobilized degrading bacteria on Ti electrode as cathode and Ti/PbO2 electrode as anode. With the biofilmelectrode reactor in a divided electrolytic cell, the phenol degradation rate could achieve 100% at 18 h which was higher than using traditional methods, such as biological or electrochemical methods. Chemical oxygen demand （COD） removal rate of the biofilmelectrode reactor was also greater than that using biological and electrochemical method, and could reach 80% at 16 h. The results suggested that the biofilm-electrode reactor system can be used to treat wastewater with phenol.展开更多
针对污水处理厂尾水TN去除问题,采用16S r DNA克隆文库法,探究了3DBER-S(三维电极生物膜耦合硫自养脱氮工艺)的强化脱氮机制及其菌群特征.结果表明,I(电流)和HRT(水力停留时间)对3DEBR-S中氢自养和硫自养反硝化作用所占比例的影响较大,...针对污水处理厂尾水TN去除问题,采用16S r DNA克隆文库法,探究了3DBER-S(三维电极生物膜耦合硫自养脱氮工艺)的强化脱氮机制及其菌群特征.结果表明,I(电流)和HRT(水力停留时间)对3DEBR-S中氢自养和硫自养反硝化作用所占比例的影响较大,但对脱氮效率影响不显著.当进水C/N〔ρ(CODCr)/ρ(TN)〕为1、ρ(NO3--N)为35 mg/L、I为300 m A、HRT为4 h时,NO3--N和TN去除率可分别稳定在80%和74%以上.16S r DNA克隆文库结果显示,反应器中β变形菌纲为优势菌群,占47.89%〔以OUT(操作单元)计〕.在β变形菌纲中,与具有反硝化功能的陶厄氏菌属(Thauera)相似的细菌所占比例最大,为52.94%;与可分别利用硫和氢为电子供体进行反硝化脱氮的硫杆菌属(Thiobacillus)和食酸菌属(Acidovorax)相似的细菌分别占17.65%和14.71%.3DBER-S中存在异养联合氢自养和硫自养反硝化协同去除硝酸盐氮的作用,可为反硝化脱氮提供充足的电子供体,节约了有机碳源消耗,并保证了稳定高效的脱氮效果.展开更多
基金supported by the Hi-Tech Research and Development Program (863) of China (No. 2006AA06Z321)the National Natural Science Foundation of China(No.20843001)
文摘The new biofilm-electrode method was used for the phenol degradation, because of its low current requirement. The biofilm-electrode reactor consisted of immobilized degrading bacteria on Ti electrode as cathode and Ti/PbO2 electrode as anode. With the biofilmelectrode reactor in a divided electrolytic cell, the phenol degradation rate could achieve 100% at 18 h which was higher than using traditional methods, such as biological or electrochemical methods. Chemical oxygen demand （COD） removal rate of the biofilmelectrode reactor was also greater than that using biological and electrochemical method, and could reach 80% at 16 h. The results suggested that the biofilm-electrode reactor system can be used to treat wastewater with phenol.
文摘针对污水处理厂尾水TN去除问题,采用16S r DNA克隆文库法,探究了3DBER-S(三维电极生物膜耦合硫自养脱氮工艺)的强化脱氮机制及其菌群特征.结果表明,I(电流)和HRT(水力停留时间)对3DEBR-S中氢自养和硫自养反硝化作用所占比例的影响较大,但对脱氮效率影响不显著.当进水C/N〔ρ(CODCr)/ρ(TN)〕为1、ρ(NO3--N)为35 mg/L、I为300 m A、HRT为4 h时,NO3--N和TN去除率可分别稳定在80%和74%以上.16S r DNA克隆文库结果显示,反应器中β变形菌纲为优势菌群,占47.89%〔以OUT(操作单元)计〕.在β变形菌纲中,与具有反硝化功能的陶厄氏菌属(Thauera)相似的细菌所占比例最大,为52.94%;与可分别利用硫和氢为电子供体进行反硝化脱氮的硫杆菌属(Thiobacillus)和食酸菌属(Acidovorax)相似的细菌分别占17.65%和14.71%.3DBER-S中存在异养联合氢自养和硫自养反硝化协同去除硝酸盐氮的作用,可为反硝化脱氮提供充足的电子供体,节约了有机碳源消耗,并保证了稳定高效的脱氮效果.
