摘要
采用序批式反应器,研究了甲醇、乙酸钠、乙二醇、丙三醇和葡萄糖这5种碳源对不同电子受体反硝化性能的影响。结果表明,以NO_(3)^(−)-N为电子受体时,甲醇、乙酸钠、乙二醇、丙三醇、葡萄糖的最佳碳氮比(溶液中化学需氧量(COD)和总氮(TN)质量浓度之比)分别为5.0、5.0、7.0、7.0、8.0,比反硝化速率从快到慢依次是乙酸钠、甲醇、乙二醇、丙三醇、葡萄糖;以NO_(2)^(−)-N为电子受体时,甲醇、乙酸钠、乙二醇、丙三醇、葡萄糖的最佳碳氮比分别为3.0、3.0、3.5、4.0、4.0,比反硝化速率从快到慢依次是甲醇、乙酸钠、乙二醇、葡萄糖、丙三醇。经成本计算可得,当处理相同质量浓度的NO_(3)^(−)-N和NO_(2)^(−)-N时,分别需要投加的碳源成本从低到高依次为甲醇、葡萄糖、乙酸钠、乙二醇、丙三醇和甲醇、葡萄糖、乙二醇、乙酸钠、丙三醇。
Five carbon sources,including methanol,sodium acetate,glycol,glycerol,and glucose were used to investigate the denitrification performance of different electron acceptors in sequencing batch reactors(SBRs).The results demonstrated that the removal ratios and specific denitrification rates of different carbon sources all showed upward trends with the increasing of carbon nitrogen ratios(The ratio of chemical oxygen demand(COD)to total nitrogen(TN)mass concentration).The optimal carbon nitrogen ratios of five carbon resources for NO_(3)^(−)-N and NO_(2)^(−)-N were 5.0,5.0,7.0,7.0,8.0 and 3.0,3.0,3.5,4.0,4.0,respectively.Under the optimal carbon nitrogen ratio,the specific denitrification rates decreased with the sequence of sodium acetate,methanol,glycol,glycerol and glucose for NO_(3)^(−)-N electron acceptor,and methanol,sodium acetate,glycol,glucose and glycerol for NO_(2)^(−)-N electron acceptor.After calculation,the cost for treating the same concentrations of NO_(3)^(−)-N increased with the sequence of methanol,glucose,sodium acetate,glycol,and glycerol,while that of NO_(2)^(−)-N increased with the sequence of methanol,glucose,glycol,sodium acetate,and glycerol.Compared to NO_(3)^(−)-N,NO_(2)^(−)-N saved 40%—50%carbon sources cost at the same concentration.Glucose was recommended as the external carbon source with low ammonia nitrogen loading rates,and sodium acetate was recommended with high ammonia nitrogen loading rates,while glycol could be served as the substitute for sodium acetate.
作者
楼超楠
韩昫身
金艳
何焱
宋兴福
LOU Chaonan;HAN Xushen;JIN Yan;HE Yan;SONG Xingfu(State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process,East China University of Science and Technology,Shanghai 200237,China;Suzhou Synovo Green Tech Company Limited,Changshu 215513,Jiangsu,China;Sichuan Changning Gas Development Company,Yibin 644000,Sichuan,China)
出处
《华东理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2023年第5期660-669,共10页
Journal of East China University of Science and Technology
基金
上海市青年科技英才扬帆计划(20YF1409500)
中国博士后科学基金特别资助及面上资助(2021T140206,2021M691010)
中国石油科技创新基金(2020D-5007-0502)。
关键词
反硝化
碳源
碳氮比
比反硝化速率
硝酸盐氮
亚硝酸盐氮
denitrification
carbon source
carbon nitrogen ratio
specific denitrification rate
NO_(3)^(−)-N
NO_(2)^(−)-N
