基于间歇饥饿的SNAD工艺运行  

Effects of Intermittent Starvation on the Operation of the SNAD Process

作　　者：李冬[1] 刘志诚 徐贵达 王玉颖 张杰[1,2] LI Dong;LIU Zhi-cheng;XU Gui-da;WANG Yu-ying;ZHANG Jie(Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering,College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124,China;State Key Laboratory of Urban Water Resource and Environment,School of Environment,Harbin Institute of Technology,Harbin 150090,China)

机构地区：[1]北京工业大学建筑工程学院,水质科学与水环境恢复工程北京市重点实验室,北京100124 [2]哈尔滨工业大学环境学院,城市水资源与水环境国家重点实验室,哈尔滨150090

出　　处：《环境科学》2020年第1期337-344,共8页Environmental Science

基　　金：北京高校卓越青年科学家计划项目(BJJWZYJH01201910005019)

摘　　要：在室温下(22℃±3℃)用SBR反应器运行SNAD工艺,通过定期延长系统水力停留时间,营造间歇饥饿环境,探讨间歇饥饿策略下SNAD工艺的运行情况.结果表明,系统经过间歇饥饿运行后,好氧阶段末的NO3--N浓度降至8. 72 mg·L-1,亚硝酸盐积累率达到83. 18%,表明NOB活性得到了有效抑制,实现了亚硝化性能的提高;系统经过间歇饥饿运行后,好氧阶段末的亚氮与氨氮基质的比例得到调整,为后续厌氧氨氧化过程提供了合适底物,使出水氨氮浓度降至1. 0 mg·L-1以下,同时由于出水硝氮浓度降低,总氮去除率达到了92. 07%左右,系统处理性能提高;通过测定功能菌活性,发现饥饿后亚硝化性能提高的主要原因是饥饿期AOB活性衰减速率低于NOB及恢复期前期AOB活性恢复速率显著高于NOB.We report on and discuss the effects of intermittent starvation on the operation of the simultaneous partial nitrification,ANAMMOX,and denitrification( SNAD) process. The SNAD process was carried out in a sequencing batch reactor( SBR) at room temperature( 22℃ ± 3℃),and the intermittent starvation was achieved by periodically extending the hydraulic retention time( HRT)of the system. The results showed that after the operation of intermittent starvation,the NO3--N concentration at the end of the aerobic phase decreased to 8. 72 mg·L-1 and the NO2-accumulation percentage reached 83. 18%,which indicated that the nitrite oxidizing bacteria( NOB) activity was effectively inhibited and that the nitritation performance improved. After the operation of the intermittent starvation,the ratio of NO2-to NH4+-N at the end of the aerobic phase was adjusted to provide more suitable substrates for the subsequent ANAMMOX process,such that the concentration of NH4+-N in the effluent fell below 1. 0 mg·L-1. At the same time,due to the decrease of the NO3-concentration,the total N removal rate reached 92. 07%,which indicated that the treatment performance improved. By determining the activity of the functional bacteria,we found that the main reason for the improvement in the nitritation performance after starvation was that the decay rate of the ammonia oxidizing bacteria( AOB) activity during the starvation period was lower than of the decay rate of the NOB activity,and that the recovery rate of the AOB activity during the recovery period was significantly higher than that of the NOB.

关 键 词：同步短程硝化、厌氧氨氧化耦合反硝化(SNAD) 间歇饥饿 氨氧化菌(AOB) 亚硝酸盐氧化菌(NOB) 

分 类 号：X703.1[环境科学与工程—环境工程]