Analysis on denitrification mechanism of low temperature wastewater treatment by three-stage AO coupling process
WANG Fan1, LI Jun2, AI Sheng-shu1, ZHU Sui-yi1,3, NIE Ze-bing1,3, YAN Yi-ming1, BIAN Dei-jun1,3
1. Jilin Key Laboratory of Urban Sewage Treatment, Changchun Institute of Technology, Changchun 130012, China;
2. College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China;
3. Science and Technology Innovation Center for Municipal Wastewater Treatment and Water Quality Protection, Northeast Normal University, Changchun 130117, China
The three-stage AO coupled biofilm reactor was used to treat low-temperature wastewater. At the temperature was (10±1)℃, the hydraulic retention time(HRT) was controlled to 8h, the inlet flow distribution ratio was 3:2:1, and the sludge reflux ratio was 50%, then the low-temperature sewage removal effect of the coupled process, the change rule of pollutants in the reactor, the removal rule of nitrogen at each stage, and the system's nitrification and denitrification performance were studied. The removal efficiency of COD and NH4+-N in the coupled process were exceeded 90%, and the removal efficiency of TN and TP reaches 80%. Moreover, the concentration of biofilm in the reactor ranged from 400 to 800mg/L, the removal rate of NH4+-N at all stage of the system were exceeded 80%. The denitrification rate and the rate of aerobic simultaneous nitrification were 50.15% and 26.05%, respectively. Affected by the substrate concentration and the number of functional bacteria, the reactor's second-stage specific nitrification rate and specific denitrification rate were the highest.
王帆, 李军, 艾胜书, 朱遂一, 聂泽兵, 闫艺明, 边德军. 三级AO耦合工艺低温污水处理脱氮机理[J]. 中国环境科学, 2020, 40(3): 1059-1067.
WANG Fan, LI Jun, AI Sheng-shu, ZHU Sui-yi, NIE Ze-bing, YAN Yi-ming, BIAN Dei-jun. Analysis on denitrification mechanism of low temperature wastewater treatment by three-stage AO coupling process. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(3): 1059-1067.
张智,李柏林,相欣奕,等.处理低温低碳源城市污水的A/A/O氧化沟工艺脱氮运行工况优化[J]. 环境工程学报, 2012,6(8):2565-2570. Zhang Z, Li B L, Xiang X Y, et al. Operation optimization of A/A/O oxidation ditch for nitrogen removal from low-temperature and lowcarbon municipal sewage[J]. Chinese Journal of Environmental Engineering, 2012,6(8):2565-2570.
[2]
刘伟华.MPSR处理低温低碳源城市污水中试研究[D]. 长春:长春工程学院, 2018. Liu W H. Pilot Study on MPSR Treatment of Low Temperature and Low Carbon Source Municipal Wastewater[D]. Chang chun:Chang chun institute of technology, 2018.
[3]
贲岳,陈忠林,徐贞贞,等.低温生活污水处理系统中耐冷菌的筛选及动力学研究[J]. 环境科学, 2008,29(11):3189-3193. Ben Y, Chen Z L, Xu Z Z, et al. Selection and Kinetic Mechanism of Psychrotrophs in Low Temperature Wastewater Treatment[J]. Environmental Science, 2008,29(11):3189-3193.
[4]
张勇,王淑莹,赵伟华,等.低温对中试AAO-BAF双污泥脱氮除磷系统的影响[J]. 中国环境科学, 2016,36(1):56-65. Zhang Y, Wang S Y, Zhao W H, et al. Effect of low temperature on pilot-scale AAO-BAF two-sludge system[J]. China Environmental Science, 2016,36(1):56-65.
[5]
Min Y, Sun P, Wang R, et al. Simulation and optimization of ammonia removal at low temperature for a double channel oxidation ditch based on fully coupled activated sludge model (FCASM):A full-scale study[J]. Bioresource Technology, 2013,143(9):538-548.
[6]
Komorowska-Kaufman M, Majcherek H, Eugeniusz Klaczyński. Factors affecting the biological nitrogen removal from wastewater[J]. Process Biochemistry, 2006,41(5):1015-1021.
[7]
He S B, Gang X, Kong H N. The performance of BAF using natural zeolite as filter media under conditions of low temperature and ammonium shock load[J]. Journal of Hazardous Materials, 2007, 143(1/2):291-295.
[8]
Huang Z, Qie Y, Wang Z, et al. Application of deep-sea psychrotolerant bacteria in wastewater treatment by aerobic dynamic membrane bioreactors at low temperature[J]. Journal of Membrane Science, 2015,475:47-56.
[9]
崔迎,褚文伟,万方.低温条件A2/O-MBR工艺脱氮效率试验研究[J]. 给水排水, 2014,50(12):26-30. Cui Y, Chu W W, Wan F. Study on nitrogen remoal efficiency of A2/O-MBR process at low temperature condition[J]. Water & Wastewater Engineering, 2014,50(12):26-30.
[10]
Lee Y W, Kim Y J, Chang N I, et al. Development of sequencing batch reactor with step feed and recycle[J]. Water Science and Technology, 2007,55(1/2):477.
[11]
Lemaire R, Yuan Z, Bernet N, et al. A sequencing batch reactor system for high-level biological nitrogen and phosphorus removal from abattoir wastewater[J]. Biodegradation, 2009,20(3):339-350.
[12]
王帆,李军,边德军,等.多级AO耦合流离生化工艺流量分配比优化及脱氮机制[J]. 环境科学, 2018,39(12):5572-5579. Wang F, Li J, Bian D J. et al. Optimization of the Flow Distribution Ratio and Mechanism of Nitrogen Removal in a Multi-level AO Coupled Flow Biochemical Process[J]. Environmental Science, 2018, 39(12):5572-5579.
[13]
国家环境保护总局.水和废水监测分析方法[M]. 北京:中国环境科学出版社, 2002:227-285. General Administration of Environmental Protection of the People's Republic of China. Standard methods for the examination of water and wastewater[M]. Beijing:China Environmental Science Press, 2002:227-285.
[14]
刘媛.MBBR处理城镇污水的基础研究[D]. 西安:西安建筑科技大学, 2007. Liu Y. Study on Moving Bed Biofilm Reactor application in town wastewater treatment plant[D]. Xi'an:Xi'an university of architecture and technology, 2007.
[15]
罗固源,张园,许晓毅. SUFR系统中活性污泥特性及反硝化除磷稳定性[J]. 环境科学研究, 2011,24(1):85-89. Luo G Y, Zhang Y, Xu X Y. Characteristics of Activated Sludge and Stability of Denitrifying Phosphorus Removal in SUFR System[J]. Research of Environmental Sciences, 2011, 24(1):85-89.
[16]
吴代顺,方燕蓝.氧化沟工艺污水处理厂的活性污泥特性分析[J]. 中国给水排水, 2018,34(11):109-113. Wu D S, Fang Y L. Characteristic Analysis on Activated Sludge in a Wastewater Treatment Plant with Oxidation Ditch Process[J]. China Water & Wastewate, 2018,34(11):109-113.
[17]
王文浩,李文超,何岩,等.城镇污水处理厂低温硝化强化研究进展[J]. 工业水处理, 2016,36(6):7-11. Wang W H, Li W C, He Y, et al. Research progress in the nitrification reinforcement at low temperature for urban sewage treatment plants[J]. Industrial Water Treatment, 2016,36(6):7-11.
[18]
明驹.MBBR-多级AO耦合工艺处理城市生活污水实验研究[D]. 兰州:兰州交通大学, 2017. Ming J. Experimental Study on Treatment of Municipal Sewage by Combined Multi-stages A/O Process and MBBR[D]. Lanzhou:Lanzhou Jiaotong University, 2017.
[19]
王振,朱振华,丁亚男,等.低温对CANON型序批式生物膜反应器脱氮的影响[J]. 中国环境科学, 2019,39(4):1533-1541. Wang Z, Zhu Z H, Ding Y N, et al. Effect of low temperature on nitrogen removal in a sequencing batch biofilm reactor with CANON process[J]. China Environmental Science, 2019,39(4):1533-1541.
[20]
魏小涵,毕学军,尹志轩,等.温度和DO对MBBR系统硝化和反硝化的影响[J]. 中国环境科学, 2019,39(2):612-618. Wei X H, Bi X J, Yin Z X, et al. Effects of temperature and dissolved oxygen on nitrification and denitrification in MBBR system[J]. China Environmental Science, 2019,39(2):612-618.
[21]
刘明超.改良A2/O工艺处理寒区低碳氮比城市污水的试验研究[D]. 哈尔滨:哈尔滨工业大学, 2014. Liu M C. Study on the performance of low COD/N ratio urban wastewater in cold area by modified A2/O process[D]. Harbin:Harbin Institute of Technology, 2014.
[22]
史登峰.低温条件下复合填料协同强AO-BAF脱氮除磷试验研究[D]. 兰州:兰州交通大学, 2017. Shi D F. Study on Nitrogen and Phosphorus Removal of A/O-BAF with Composite Filler at low temperature[D]. Lanzhou:Lanzhou Jiaotong University, 2017.
[23]
Wu L, Wang J, Liu X. Enhanced nitrogen removal under lowtemperature and high-load conditions by optimization of the operating modes and control parameters in the CAST system for municipal wastewater[J]. Desalination and Water Treatment, 2015, 53(6):1683-1698.
[24]
韩晓宇,黄京,刘新春,等.厌氧氨氧化技术处理热水解消化液的实验研究[J]. 中国环境科学, 2017,37(7):2542-2549. Han X Y, Huang J, Liu X C, et al. Study on treatment of thermal hydrolysis anaerobic digester effluent by anaerobic ammonia oxidation technique[J]. China Environmental Science, 2017,37(7):2542-2549.
