Influence of pulsed flow fluctuation on UASB reactor of anaerobic ammonia oxidation
GAO Meng-jia1, WANG Shu-ying1, WANG Shan-yun2, PENG Yong-zhen1, JIA Fang-xu1
1. Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China;
2. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
Due to the fluctuation of upstream sewage during the actual operation, the effect of pulsed inflow shock on the stability of anaerobic ammonium oxidation (ANAMMOX) process was evaluated in the present study through changing the amplitude and frequency of pulsed inflow. The results showed that the ANAMMOX process in UASB reactor had a good adaptivity and tolerance towards pulsed inflow when the amplitude was less than 60mL/min(vupflow=1.33cm/min). Even through the pulsed frequency came to a high level, the effluent could meet the national 1-A standard. The removal efficiency ratio of NH4+-N and NO2--N could both been kept above 80% and the removal ratio of total nitrogen was above 70%. The process of ANAMMOX in UASB reactor was unstable when the pulsed amplitude came to 100mL/min (vupflow=2.22cm/min). With the enhancement of pulsed frequency, the adaptation time of ANAMMOX process increased. The concentrations of NH4+-N and NO2--N in effluent were both above 5mg/L when the pulsed frequency came to 1.5h. Moreover, when the pulsed amplitude increased from 40mL/min to 60mL/min and 100mL/min, the abundance of anammox bacteria in reactor and the percentage of anammox on total bacteria firstly increased and then decreased. The abundance and percentage of anammox bacteria in total bacteria came to the highest level when the pulsed amplitude came to 60mL/min. The reason might be that the mixture and contaction of the anammox and the substance were more efficient, which facilited the growth of anammox bacteria.
Swati T, Sunil K G , Brijesh K M. A novel strategy for simultaneous removal of nitrogen and organic matter using anaerobic granular sludge in anammox hybrid reactor[J]. Bioresource Technology, 2015,197:171-177.
[2]
Fernandez I, Dosta J, Fajardo C, et al. Short- and long-term effects of ammonium and nitrite on the anammox process[J]. Environmental Management, 2012,95:170-174.
[3]
唐晓雪.生活污水厌氧氨氧化组合处理工艺及过程控制[D]. 北京:北京工业大学, 2014.
[4]
Zhang Q Q, Chen H, Liu J H, et al. The robustness of anammox process under the transient oxytetracycline (OTC) shock[J]. Bioresource Technology, 2014,153:39-46.
Hubaux N, Wells G, Morgenroth E. Impact of coexistence of flocs and biofilm on performance of combined nitritation-anammox granular sludge reactors[J]. Water Research, 2015,68:127-139.
[7]
Ivar Z, Ergo R, Toomas T, et al. Start-up of low-temperature anammox in UASB from mesophilic yeast factory anaerobic tank inoculum[J]. Environmental Technology, 2015,36(2):214-225.
[8]
Zhao J, Zuo J, Li P, et al. The performance of high-loading composite anammox reactor and its long-term recovery from extreme substrates inhibition[J]. Bioresource Technology, 2014, 172:50-57.
[9]
Li X J, Sung S. Development of the combined nitritation-anammox process in an upflow anaerobic sludge blanket (UASB) reactor with anammox granules[J]. Chemical Engineering Journal, 2015,281:837-843.
Yu J J, Jin R C. The anammox reactor under transient-state conditions: Process stability with fluctuations of the nitrogen concentration, inflow rate, pH and sodium chloride addition[J]. Bioresource Technology, 2012,119:166-173.
Jin R C, Yu J J, Ma C, et al. Performance and robustness of an anammox anaerobic baffled reactor subjected to transient shock loads[J]. Bioresource Technology, 2012,114:126-136.
[16]
Yuya K, Hiroki I, Kazuhiko N, et al. Stability of autotrophic nitrogen removal system under four non-steady operations[J]. Bioresource Technology, 2013,137:196-201.
Wang S Y, Zhu G B, Peng Y Z, et al. Anammox bacterial abundance, activity, and contribution in riparian sediments of the Pearl River Estuary[J]. Environmental Science & Technology, 2012,46:8834-8842.
[21]
Bhatia D, Vieth W R, Venkatasubramaniam K. Steady-state and transient-behaviour in microbial methanification.1. experimental results[J]. Biotechnology And Bioengineering, 1985,27:1192-1198.
[22]
Daverey A, Su S H, Huang Y T, et al. Partial nitrification and anammox process: a method for high strength optoelectronic industrial wastewater treatment[J]. Water Research, 2013,47: 2929-2937.
Nachaiyasit S, Stuckey D C. The effect of shock loads on the performance of an anaerobic baffled reactor (ABR). 2. step and transient hydraulic shocks at constant feed strength[J]. Water Research, 1997,31:2737-2746.
[26]
Yu J J, Jin R C. The anammox reactor under transient-state conditions: Process stability with fluctuations of the nitrogen concentration, inflow rate, pH and sodium chloride addition[J]. Bioresource Technology, 2012,119:166-173.
[27]
Guo Q, Yang C C, Xu J L, et al. Individual and combined effects of substrate, heavy metal and hydraulic shocks on an anammox system[J]. Separation and Purification Technology, 2015,154: 128-136.