水力停留时间对反应沉淀一体化反应器中半亚硝化反应的影响  

Effect of hydraulic retention time on half-nitrosofication in integrated reaction-precipitation reactor

作　　者：刘月敏[1,2] 焦秀梅[1,2] 崖婷婷[1,2] 王少坡[1,2] 李玉友[3] 孙力平[1,2] 

机构地区：[1]天津城建大学环境与市政工程学院,天津300384 [2]天津市水质科学与技术重点实验室,天津300384 [3]东北大学大学院环境科学研究科

出　　处：《环境工程学报》2014年第1期116-120,共5页Chinese Journal of Environmental Engineering

基　　金：天津市水质科学与技术重点实验室开放基金资助项目(TJKLAST-2011-17);国家自然科学基金青年科学基金项目(21206106)

摘　　要：由于反应沉淀一体化反应器的HRT与SRT不同,因此HRT是否会影响反应器中氮的存在状态,亚硝态氮积累是否能实现尚无明确结论。针对以上问题,研究不同水力停留时间对反应沉淀一体化反应器中半亚硝化反应的影响,研究结果表明:反应器运行虽然运行过程中无污泥流失,但仍可实现亚硝酸盐的积累,出水亚硝态氮和氨氮的浓度比例受水力停留时间的影响。HRT为24 h时,亚硝酸盐积累率可达到70%,但出水氨氮接近于0,很难满足ANAMMOX的进水要求;HRT为16 h和12 h时,亚硝酸盐积累率均可超过80%,出水氨氮和亚硝态氮的比例分别达到1.39∶1和1.46∶1,可为后续ANAMMOX反应提供良好进水条件。水力停留时间对污泥亚硝化潜力的影响为12 h>16 h>24 h,对硝化潜力的影响为24 h>16 h>12 h。不同水力停留时间下氨氧化速率和亚硝酸盐氧化速率均为24 h>16 h>12 h。Due to the inconsistency between hydraulic retention time（HRT） and sludge retention time in the integrated reaction-precipitation reactor（IRRP） , there is no definitive conclusion about the influence of HRT on the existing state and accumulation of nitrogen. Aiming at these problems, the effect of HRT on half-nitrosofication reaction in the IRRP was investigated. The results showed that nitrite could be accumulated without sludge washout during the operation of IRRP, and the concentration ratio of nitrite-N and ammonia-N in the effluent was affected by the HRT. At the HRT of 24 h, nitrite accumulation rate of the reactor could reach 70% with no ammonia-N in the effluent, which was difficult to meet the requirements of influent for subsequent ANAMMOX process. At the HRT of 16 h and 12 h, the concentration ratio of nitrite-N and ammonia-N in the effluent was 1.39：1 and 1.46： 1, respectively with accumulation rate of nitrite exceeding 80% , which was suitable for ANAMMOX process. The effect of HRT on nitrification potential and nitrosation potential were 24 h 〉 16 h 〉 12 h and 12 h 〉 16 h 〉24 h, respectively. Both ammonia oxidation rate and nitrite oxidation rate at different HRT were 24 h 〉 16 h 〉 12 h.

关 键 词：一体化反应器 水力停留时间 半亚硝化反应 

分 类 号：X703.1[环境科学与工程—环境工程]