Extracellular Polymeric Substances of ANAMMOX Granular Sludge and Its Effects on Sludge Surface Characteristics

被引：4
|
作者：
Yang M.-M. [1 ]
Liu Z.-H. [1 ]
Zhou Y. [1 ]
Qi J. [1 ]
Zhao F. [1 ]
Guo J.-S. [1 ]
Fang F. [1 ]
机构：
[1] School of Urban Construction and Environmental Engineering, Chongqing University, Chongqing
来源：
Huanjing Kexue/Environmental Science | 2019年 / 40卷 / 05期
关键词：
Anaerobic ammonium oxidation(ANAMMOX); Extracellular polymeric substances(EPS); Granular sludge; Particle size; Surface characteristics;
D O I：
10.13227/j.hjkx.201809149
中图分类号：
学科分类号：
摘要：
The anaerobic ammonium oxidation(ANAMMOX) granular sludge in the EGSB reactor was divided into three groups according to particle size, which were R1 (0.5-1.4 mm), R2 (1.4-2.8 mm), and R3 (>2.8 mm). Extracellular polymeric substances (EPS) of different sizes from ANAMMOX granular sludge were extracted, and the EPS characteristics and their influence on the surface characteristics of ANAMMOX aggregates were analyzed. With the increased particle size of ANAMMOX granular sludge, the PS content was between (10.69±0.11)-(12.28±0.15) mg•g-1, while the PN content increased from (56.88±0.86) mg•g-1 to (98.59±2.10) mg•g-1, and PN/PS increased from 5.32 to 9.05. The EPS functional groups and the content of three-dimensional fluorescent components of different size ANAMMOX granular sludge were different. As the granular sludge size increased, the value of α-helix/(β-sheet + random coil) gradually decreased from 0.60 to 0.43, which is beneficial to the hydrophobicity expression of the sludge. Due to the increased particle size of the granular sludge, the hydrophobicity of the sludge surface increased from 54.2% to 63.1%, and the Zeta potential increased from -41.2 mV to -31.5 mV. The increased hydrophobicity and surface charge are beneficial to the formation of sludge aggregates. EPS can enhance ANAMMOX sludge hydrophobicity and increase Zeta potential. The presence of PN in EPS is essential to this process. © 2019, Science Press. All right reserved.
引用
收藏
页码：2341 / 2348
页数：7
相关论文
共 31 条
  • [1] Jetten M.S.M., Wagner M., Fuerst J., Et al., Microbiology and application of the anaerobic ammonium oxidation ('anammox') process, Current Opinion in Biotechnology, 12, 3, pp. 283-288, (2001)
  • [2] Kartal B., Kuenen J.G., van Loosdrecht M.C.M., Sewage treatment with anammox, Science, 328, 5979, pp. 702-703, (2010)
  • [3] Zhao Y.P., Feng Y., Li J.Q., Et al., Insight into the aggregation capacity of anammox consortia during reactor start-up, Environmental Science & Technology, 52, 6, pp. 3685-3695, (2018)
  • [4] Strous M., Heijnen J.J., Kuenen J.G., Et al., The sequencing batch reactor as a powerful tool for the study of slowly growing anaerobic ammonium-oxidizing microorganisms, Applied Microbiology and Biotechnology, 50, 5, pp. 589-596, (1998)
  • [5] 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)
  • [6] Fang F., Yang M.M., Wang H., Et al., Effect of high salinity in wastewater on surface properties of anammox granular sludge, Chemosphere, 210, pp. 366-375, (2018)
  • [7] Tang C.J., Xiong L., Wang Y.Y., Et al., Kinetic characteristics of high-rate ANAMMOX Granules, Environmental Science, 34, 9, pp. 3544-3551, (2013)
  • [8] Sheng G.P., Yu H.Q., Li X.Y., Extracellular polymeric substances (EPS) of microbial aggregates in biological wastewater treatment systems: a review, Biotechnology Advances, 28, 6, pp. 882-894, (2010)
  • [9] Adav S.S., Lee D.J., Tay J.H., Extracellular polymeric substances and structural stability of aerobic granule, Water Research, 42, 6-7, pp. 1644-1650, (2008)
  • [10] McSwain B.S., Irvine R.L., Hausner M., Et al., Composition and distribution of extracellular polymeric substances in aerobic flocs and granular sludge, Applied and Environmental Microbiology, 71, 2, pp. 1051-1057, (2005)
1234