Journal of Jilin University(Earth Science Edition) ›› 2015, Vol. 45 ›› Issue (1): 247-254.doi: 10.13278/j.cnki.jjuese.201501207

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Influence of Microbial Flocculant Dosing Way on Performance of Aerobic Granules

Song Zhiwei1, Wang Qiuxu1, Ning Tingting1, Ren Nanqi2, Li Lixin1   

  1. 1. School of Environmental and Chemical Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China;
    2. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
  • Received:2014-06-05 Published:2015-01-26

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Abstract:

Aerobic granular sludge was cultivated successfully by adding microbial flocculant in the sequencing batch airlift reactors (SBARs). The physical-chemical properties and biodegradation efficiencies of the granules were studied to investigate the influence of microbial flocculant dosing way on the characteristics of aerobic granular sludge. The results showed that dosing way has a significant influence on the granulation of aerobic sludge. Aerobic granules could be formed when a certain amount of flocculant bacterium were adding into SBARs every 2, 3, 5, 7 days, respectively. The optimum dosing way was dosing every 5 day, in which case the grranulation term of aerobic granules was only 42 d, and was faster than that of 60 d in blank experiment. SVI was around 40 mL/g, settling velocity reached 35.06 m/h, the COD, NH4+-N and TP removal rates of mature granular sludge was 96.55%, 93.29% and 87.29%, respectively.

Key words: microbial flocculant, aerobic granular sludge, sequencing batch airlift reactor (SBAR)

CLC Number: 

  • X703.1

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