碳源类型对污水生物处理过程中氧化亚氮释放的影响  

Effect of carbon source types on nitrous oxide emission during wastewater treatment

作　　者：赵聪聪[1] 张建[1] 胡振[1] 谢慧君[2] 张婷婷[1] 李一冉[1] 

机构地区：[1]山东大学环境科学与工程学院,济南250100 [2]山东大学环境研究院,济南250100

出　　处：《环境科学学报》2011年第11期2354-2360,共7页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金(No.21007032);山东大学自主创新基金(No.2009JQ009);国家水专项(No.2009ZX07210-009-04)~~

摘　　要：碳源是污水生物处理过程中N2O释放的重要影响因素.本试验以不同碳源(葡萄糖、乙酸钠和淀粉)条件下的SBR反应器为研究对象,分析了碳源类型对于N2O释放的影响作用.结果发现,N2O释放主要发生在好氧段,且释放总量受碳源影响,以乙酸钠为碳源的反应器产生的N2O最多,释放速率最大,其次为葡萄糖,淀粉最少,N2O转化率分别为7.80%,5.43%,2.59%.OUR试验结合PCR-DGGE分析,以乙酸钠为碳源时氨氧化菌优势种群发生了变化,测序结果表明其为Nitrosomonas属细菌,因此N2O释放的差异是不同碳源条件下AOB菌群不同及其反硝化能力的不同所造成的.Carbon source is an important factor affecting the emission of nitrous oxide （N2O） in biological wastewater treatment processes.In this study,the effect of carbon source on N2O emission was evaluated in three sequencing batch reactors （SBRs） acclimated under different carbon sources （i.e.glucose,acetate,and starch）.Our results showed that most of the N2O emission occurred during the aerobic phase.Carbon source had an important effect on N2O emission.The highest amount and rate of N2O emission was observed in the SBR acclimated under acetate followed in order by glucose and starch.The conversion rate of N2O was determined to be 7.80%,5.43%,and 2.59%,respectively.According to results from OUR measurements and PCR-DGGE analyses,the dominating population of AOB community （e.g.Nitrosomonas in acetate SBR） was found to considerably change with varying carbon sources.This suggested that the effect of carbon source on N2O emission was most likely attributed to the difference in AOB community and the associated denitrification capability.

关 键 词：污水生物处理 氧化亚氮 碳源 硝化 反硝化 DGGE 

分 类 号：X703.1[环境科学与工程—环境工程]