C/N对好氧反硝化菌强化的SBR脱氮效率的影响  

Effects of C/N on the Denitrification Efficiency of SBR Enhanced by Aerobic Denitrifying Bacteria

作　　者：赵鑫[1] 刘芳[1] 赵研[1] 胡筱敏[1] ZHAO Xin;LIU Fang;ZHAO Yah;HU Xiao-min(School of Resources ＆ Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2018年第8期1205-1210,共6页Journal of Northeastern University(Natural Science)

基　　金：国家科技重大专项(2013ZX07202-010)

摘　　要：使用2株具有良好的好氧反硝化能力的假单胞菌对序批式反应器(SBR)进行生物强化,连续运行61 d,探讨进水C/N变化对微生物强化SBR内微生物菌群和其脱氮效率的影响.随着C/N降低,反硝化效率明显降低,但是经强化的SBR的反硝化效率始终优于对照组,向活性污泥中接种好氧反硝化细菌后,NO-3-N去除率最高提升14.1%,使用纯菌构建人工菌群可将NO-3-N去除率提高22.6%.使用好氧反硝化菌进行强化可以提升反硝化细菌所占比例,促使其迅速成为优势功能菌群,缩短系统的启动周期,大幅提高系统的反硝化效率,并且提高菌群结构和系统运行的稳定性.该技术在处理C/N>10∶1的含硝酸盐的污水时更具优势.Two strains of Pseudomonas with efficient aerobic denitrification ability were used in the bio-augmentation process of sequencing batch reactor. In the 61 days＇ operating process,the effects of C/N on the microbial community structures and denitrification efficiency were investigated. Although the denitrification efficiencies obviously decreased with the C/N decreasing,the performances of bio-augmentation groups were better than those of the negative control. Adding efficient aerobic denitrifiers into activated sludge enhanced the NO-3-N removal rate by about 14. 1%, whereas the pure-cultured group was enhanced by 22. 6%. Bioaugmentation with aerobic denitrifiers enhanced the proportion of denitrifiers,promoted them to be the dominant functional population,shortened the system＇s start-up period,greatly enhanced the denitrification efficiency,and improved the stability of the microbial community structure and the system＇s operation. This technique is more advantageous in the treatment of C/N 10 ∶ 1 wastewater containing nitrate.

关 键 词：生物强化 好氧反硝化 序批式反应器 脱氮效率 菌群结构分析 

分 类 号：X522[环境科学与工程—环境工程]