|
|
|
| MBBR-nitrification process performance and N2O emission characteristics with continuous/intermittent aeration regimes |
| ZHANG Zhe1, ZHANG Yao1, LIU Qing-hua1, LIU Chao2, WANG Ya-yi1 |
1. State Key Laboratory of Pollution Control and Resources Reuse, Shanghai institute of pollution control and ecological security, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;
2. Shanghai Environmental Sanitary Engeering Design Institute, Shanghai 200092, China |
|
|
|
|
Abstract In this study, a moving-bed Biofilm reactor (MBBR) was used to immobilize ammonia-oxidizing bacteria (AOB) on carriers. Two MBBR-AOB reactors were operated under continuous aeration (RC) and intermittent aeration (RI) in parallel. The variationsin the nitritation performance and nitrous oxide and nitric oxide emission characteristics were analyzed under different aeration regimes. The results showed that both aeration methods can achieve partial nitrification, but the average effluent concentration of NO2--N was approximately 20% higher in the RI than that in the RC; also, the degree of fluctuation of effluent NO2--N and NO3--Nwere smaller in the RI than that in the RC. Therefore, intermittent aeration mode had better nitritation performance, and it was easier to achieve a stable nitritation system. Online measurement of gaseous N2O and NO showed that RC reduced the release of NO by about 87.3% and increased the release of N2O by about 57.5%. The 16S rDNA high-throughput sequencing revealed that Nitrosomonas was the main AOB genus, and its highest relative abundance in the RC and RI modes was 8% and 10.06% respectively,and the lowest was 2.19% and 2.26% respectively. Our findings suggest running MBBR nitritation reactor with intermittent aeration mode couldachievea higher AOB relative abundance.
|
|
Received: 20 May 2019
|
|
|
|
|
|
| [1] |
杨庆,杨玉兵,杨忠启,等.溶解氧对短程硝化稳定性及功能菌群的影响[J]. 中国环境科学, 2018,38(9):3328-3334. Yang Q, Yang Y B, Yang Z Q, et al. Effect of dissolved oxygen on the stability and functional microbial communities of the partial nitrifi-cation[J]. China Environmental Science, 2018,38(9):3328-3334.
|
| [2] |
Park H, Noguera D R. Evaluating the effect of dissolved oxygen on ammonia-oxidizing bacterial communities in activated sludge[J]. Water Research. 2004,38(14/15):3275-3286.
|
| [3] |
Brockmann D, Morgenroth E. Evaluating operating conditions foroutcompeting nitrite oxidizers and maintaining partial nitrification in biofilm systems using biofilm modeling and Monte Carlo filtering[J]. Water Research, 2010,44(6):1995-2009.
|
| [4] |
Wu J, Chang Y, Gao H, et al. Responses and recovery assessment of continuously cultured Nitrosomonas europaea under chronic ZnO nanoparticle stress:Effects of dissolved oxygen[J]. Chemosphere. 2018,195:693-701.
|
| [5] |
Regmi P, Miller M W, Holgate B, et al. Control of aeration, aerobic SRT and COD input for mainstream nitritation/denitritation[J]. Water Research. 2014,57:162-171.
|
| [6] |
张姚,韩海成,王伟刚,等.溶解氧对CANON颗粒污泥自养脱氮性能的影响[J]. 中国环境科学, 2017,37(12):4501-4510. Zhang Y, Han H C, Wang W G, et al. Impact of dissolved oxygen on autotrophic nitrogen removals of the granular sludge in a CANON process[J]. China Environmental Science, 2017,37(12):4501-4510.
|
| [7] |
Canziani R, Emondi V, Garavaglia M, et al. Effect of oxygen concentration on biological nitrification and microbial kinetics in a cross-flow membrane bioreactor (MBR) and moving-bed biofilm reactor (MBBR) treating old landfill leachate[J]. Journal of Membrane Science. 2006,286(1/2):202-212.
|
| [8] |
Sliekers A O, Derwort N, Gomez J L, et al. Completely autotrophic nitrogen removal over nitrite in one single reactor[J]. Water Research. 2002,36(10):2475-2482.
|
| [9] |
王琳,徐新阳,张铭川.间歇曝气对化肥废水的短程硝化性能影响[J]. 中国环境科学, 2017,37(1):146-153. Wang L, Xu X Y, Zhang M C. Effects of intermittent aeration on the performance of partial nitrification treating fertilizer waste -water[J]. China Environmental Science, 2017,37(1):146-153.
|
| [10] |
Gabarró J, Hernández-Del Amo E, Gich F, et al. Nitrous oxide reduction genetic potential from the microbial community of an intermittently aerated partial nitritation SBR treating mature landfill leachate[J]. Water Research, 2013,47(19):7066-7077.
|
| [11] |
Ge S, Peng Y, Qiu S, et al. Complete nitrogen removal from municipal wastewater via partial nitrification by appropriately alternating anoxic/aerobic conditions in a continuous plug-flow step feed process[J]. Water Research, 2014,55:95-105.
|
| [12] |
Zhang Y, Wang Y, Yan Y, et al. Characterization of CANON reactor performance and microbial community shifts with elevated COD/N ratios under a continuous aeration mode[J]. Frontiers of Environmental Science & Engineering, 2019,13(1):7.
|
| [13] |
Chen G H, Yip W K, Mo H K, et al. Effect of sludge fasting/feasting on growth of activated sludge cultures[J]. Water Research, 2001,35(4):1029-1037.
|
| [14] |
Castro-Barros C M, Daelman M R J, Mampaey K E, et al. Effect of aeration regime on N2O emission from partial nitritation-anammox in a full-scale granular sludge reactor[J]. Water Research, 2015,68:793-803.
|
| [15] |
Chuang H, Ohashi A, Imachi H, et al. Effective partial nitrification to nitrite by down-flow hanging sponge reactor under limited oxygen condition[J]. Water Research, 2007,41(2):295-302.
|
| [16] |
Desloover J, De Clippeleir H, Boeckx P, et al. Floc-based sequential partial nitritation and anammox at full scale with contrasting N2O emissions[J]. Water Research, 2011,45(9):2811-2821.
|
| [17] |
Kampschreur M J, van der Star W R L, Wielders H A, et al. Dynamics of nitric oxide and nitrous oxide emission during full-scale reject water treatment[J]. Water Research, 2008,42(3):812-826.
|
| [18] |
Okabe S, Oshiki M, Takahashi Y, et al. N2O emission from a partial nitrification-anammox process and identification of a key biological process of N2O emission from anammox granules[J]. Water Research, 2011,45(19):6461-6470.
|
| [19] |
Miao L, Zhang Q, Wang S, et al. Characterization of EPS compositions and microbial community in an Anammox SBBR system treating landfill leachate[J]. Bioresource Technology, 2018,249:108-116.
|
| [20] |
Bin Z, Zhe C, Zhigang Q, et al. Dynamic and distribution of ammonia-oxidizing bacteria communities during sludge granulation in an anaerobic-aerobic sequencing batch reactor[J]. Water Research, 2011,45(18):6207-6216.
|
| [21] |
Bassin J P, Abbas B, Vilela C L S, et al. Tracking the dynamics of heterotrophs and nitrifiers in moving-bed biofilm reactors operated at different COD/N ratios[J]. Bioresource Technology, 2015,192:131-141.
|
| [22] |
赵诗惠,吕亮,蒋志云,等.ABR-MBR组合工艺短程硝化过程的微生物种群[J]. 中国环境科学, 2018,38(2):566-573. Zhao S H, Lü L, Jiang Z Y, et al. Analysis of microbial population of shortcut nitrification in ABR-MBR process[J]. China Environ-mental Science, 2018,38(2):566-573.
|
|
|
|
