溶解氧对生物接触氧化+生物流化床联合脱氮效果的影响  

Effects of dissolved oxygen on nitrogen removal by a combination of biological contact oxidation and biological fluidized bed

作　　者：许德超 朱婷婷 阳立平 张巧 尹雪 谢帮蜜 彭盛华 XU Dechao;ZHU Tingting;YANG Liping;ZHANG Qiao;YIN Xue;XIE Bangmi;PENG Shenghua(Shenzhen Academy of Environmental Sciences,State Environmental Protection Key Laboratory of Drinking Water Source Management and Technology(Shenzhen),Shenzhen Key Laboratory of Emerging Contaminants Detection&Control in Water Environment,Shenzhen Guangdong 518001)

机构地区：[1]深圳市环境科学研究院,国家环境保护饮用水水源地管理技术重点实验室(深圳),深圳市水环境中新型污染物检测与控制重点实验室,广东深圳518001

出　　处：《环境污染与防治》2020年第12期1557-1562,共6页Environmental Pollution & Control

基　　金：深圳市科技计划应用示范项目(No.KJYY20170724165404571)。

摘　　要：不设缺氧段,采用生物接触氧化池与生物流化床联合处理实际生活污水,研究溶解氧(DO)浓度对其脱氮效果的影响。实验分为Ⅰ、Ⅱ、Ⅲ3个阶段,3个阶段生物接触氧化池DO质量浓度分别设置为(1.5±0.4)、(2.8±0.6)、(4.6±0.8)mg/L,生物流化床曝气量基本不变。结果表明,3个阶段生物接触氧化池氨氮去除率随DO的升高而升高,但生物流化床中的氨氮浓度降低,不利于厌氧氨氧化反应的进行,并影响最终TN的去除效果,第Ⅰ、Ⅱ、Ⅲ阶段的整体TN去除率分别为73.7%±6.9%、72.0%±2.1%和51.4%±5.6%。可见,生物接触氧化池设置较低的DO既能提升脱氮效果,也能降低曝气能耗。To study the effects of dissolved oxygen(DO)concentration on nitrogen removal,the method of biological contact oxidation tank combined with biological fluidized bed without anoxic phase to treat actual municipal wastewater was investigated.The experiment was divided into stageⅠ,ⅡandⅢ,and the DO concentrations in biological contact oxidation tank were controlled at(1.5±0.4),(2.8±0.6),and(4.6±0.8)mg/L,respectively,but the aeration rate in biological fluidized bed was basically unchanged.The results indicated that higher DO concentration resulted in higher ammonia nitrogen removal rate in biological contact oxidation tank,leading to less ammonia nitrogen flowing into subsequent biological fluidized bed,where the anaerobic ammonium oxidation was influenced and TN removal rate was affected.The overall TN removal rates of stageⅠ,ⅡandⅢwere 73.7%±6.9%,72.0%±2.1%,and 51.4%±5.6%,respectively.In conclusion,lower DO concentration in the biological contact oxidation tank could improve nitrogen removal and save energy simultaneously.

关 键 词：溶解氧 生物接触氧化 生物流化床 脱氮 

分 类 号：X799.3[环境科学与工程—环境工程]