Enhancement of partial nitrification performance of aerobic granular sludge by coordinating C/N loading rate

被引：0
|
作者：
Qian F. [1 ,2 ]
Liu X. [1 ]
Zhang N. [1 ]
Wang X. [1 ]
Wang J. [1 ,2 ]
Liu G. [1 ]
机构：
[1] School of Environmental Science and Technology, Suzhou University of Science and Technology, Suzhou, 215009, Jiangsu
[2] Jiangsu High Education Collaborative Innovation Center of Water Treatment Technology and Material, Suzhou, 215009, Jiangsu
来源：
Huagong Xuebao/CIESC Journal | 2016年 / 67卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Aerobic; Granular sludge; Immobilization; Nitrite accumulation; Selective inhibition; Waste water;
D O I：
10.11949/j.issn.0438-1157.20160120
中图分类号：
学科分类号：
摘要：
In order to start up an autotrophic partial nitrification process, the coordinated control of the influent C/N loading rate was carried out in the lab-scale sequencing batch reactor (SBR) inoculated with heterogeneous granular biomass. During the operation period, the evolution of granule size distribution, extracellular polymeric substances (EPS) composition and dynamics activities of functional microbes were also investigated to elaborate main factors for the conversion of sludge characteristics. The results showed that the nitrite nitrogen (NO2--N) accumulation rate of SBR would reach around 1.34 kg·(m3·d)-1, with the persistent enhancement of ammonia-oxidizing bacteria (AOB) activity and the effective inhibition of nitrite-oxidizing bacteria (NOB), represented by specific N4+-N removal (μNH4-N) and NO3--N accumulation (μNO3-N) rates, respectively. Moreover, the mean diameter of sludge granular increased from 1.4 mm to around 2.2 mm with the color of reddish brown, while its settling ability was improved significantly. Benefited from the accumulation of EPS contents, AOB could be immobilized by granular sludge effectively, even if the settling time of reaction cycle was set at 3 min. In addition, the selective inhibition of NOB caused by both free ammonia (FA) and free nitrous acid (FNA) during the aeration period was the other main factor for stable partial nitrification. © All Right Reserved.
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页码：3946 / 3953
页数：7
相关论文
共 29 条
  • [1] Ma B., Wang S.Y., Cao S.B., Et al., Biological nitrogen removal from sewage via anammox: recent advances, Bioresource Technology, 200, pp. 981-990, (2016)
  • [2] Lackner S., Gilbert E.M., Vlaeminck S.E., Et al., Full-scale partial nitritation/anammox experiences: an application survey, Water Research, 55, pp. 292-303, (2014)
  • [3] Ali M., Okabe S., Anammox-based technologies for nitrogen removal: advances in process start-up and remaining issues, Chemosphere, 141, pp. 144-153, (2015)
  • [4] Wu L., Peng Y.Z., Wang S.Y., Et al., Quick start and maintenance of nitrifying granular sludge in SBR process, CIESC Journal, 61, 11, pp. 2931-2937, (2010)
  • [5] Liu W.R., Shen Y.L., Ding L.L., Et al., Study on rapid start-up of a nitrifying process using aerobic granular sludge as seed sludge, Environmental Science, 34, 6, pp. 2302-2308, (2013)
  • [6] Wei D., Xue X.D., Yan L.G., Et al., Effect of influent ammonium concentration on the shift full nitritation to partial nitrification in a sequencing batch reactor at ambient temperature, Chemical Engineering Journal, 235, pp. 19-26, (2014)
  • [7] Adav S.S., Lee D.J., Show K.Y., Et al., Aerobic granular sludge: recent advances, Biotechnology Advances, 26, 5, pp. 411-423, (2008)
  • [8] Park E., Bae W., Rittmann B.E., Operational boundaries for nitrite accumulation in nitrification based on minimum/maximum substrate concentrations that include effects of oxygen limitation, pH, and free ammonia and free nitrous acid inhibition, Environment Science and Technology, 44, 1, pp. 335-342, (2010)
  • [9] Chen F.Y., Liu Y.Q., Tay J., Et al., Rapid formation of nitrifying granules treating high-strength ammonium wastewater in a sequencing batch reactor, Appl. Microbiol. Biotechnol., 99, 10, pp. 4445-4452, (2015)
  • [10] Kishida N., Saeki G., Tsuneda S., Et al., Rapid start-up of a nitrifying reactor using aerobic granular sludge as seed sludge, Water Science and Technology, 65, 3, pp. 581-588, (2012)
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