Characteristics of Aerobic Granular Sludge Cultivated by Promoting and Inhibiting Filamentous Bacteria

Abstract:

Using conventional flocculent activated sludge as seeding sludge, two types of mature aerobic granular sludge were respectively cultivated in the same two sequencing batch reactors (SBR) by promoting and inhibiting filamentous bacteria growth. In R1 reactor the mature aerobic granular sludge was cultivated by promoting filamentous bacteria growth, and the whole cultivation process lasted for 15d. At the same time, another kind of mature aerobic granular sludge was cultivated in R2 reactor by restraining filamentous bacteria growth, and the whole cultivation process lasted for 120d. The comparative analysis showed that the sludge granules produced in R1 reactor had a settling velocity of 45 m/h, SVI (sludge volume index) of 35~45 mL/g, SOUR (sludge oxygen consumption rate) of 1.35 mg/(g•min) and main diameter distribution ranged 2~4 mm; while the sludge granules cultivated in R2 reactor had a settling velocity of 61 m/h, SVI of about 30 mL/g, SOUR of 1.21 mg/(g•min) and main diameter distribution ranged 1~1.6 mm.

• Periodical: Advanced Materials Research (Volumes 183-185)
• Pages: 1075-1079
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.183-185.1075
• Online since: January 2011
• Authors: Shuo Du, Zhao Hui Zhang, Yu Feng Zhang, Pei Chao Jian
• Keywords: Aerobic Granular Sludge, Filamentous Bacteria, Formation Mechanism, Sludge Oxygen Consumption Rate

References

[1] Beun J J, Hendeiks A. Aerobic granulation in a sequencing batch reactor [J]. Wat - Res, 1999, 33 (10): 890-893.

[2] Ross W R. The phenomenon of sludge pelletization in the anaerobic treatment of a maize processing waste [J]. Water S A, 1984, 10 (4): 197-204.

[3] Schmidt J E, Ahring Birgitte K. Granular sludge formation in upflow anaerobic sludge blanket (UASB) reactors [J]. Biotech Bioeng, 1996, 49 (3): 229-246.

DOI: 10.1002/(sici)1097-0290(19960205)49:3<229::aid-bit1>3.0.co;2-m

[4] Wang Q, Du G C, Chen J. Aerobic granulation sludge cultivated under the selective pressure as a driving force [J]. Process Bio2 chemistry, 2004, 39 (5): 557-563.

DOI: 10.1016/s0032-9592(03)00128-6

[5] Fang H H P. Microbial distribution in UASB granules and its resulting effects [J]. Wat Sci Tech, 2008, 42 (12): 201-208.

DOI: 10.2166/wst.2000.0272

[6] Standard Method for the Examination of Water and Wastewater Editorial Board. Standard Method for the Examination of Water and Wastewater [M]. Environmental Science Press of China, Beijing, (2002).

[7] Moy B Y P, Tay J H, Toh S K, et al. High organic loading influences the physical characteristics of aerobic granules[J]. Letts Appl Microbiol, 2002, 34: 407-412.

DOI: 10.1046/j.1472-765x.2002.01108.x