J4 ›› 2011, Vol. 41 ›› Issue (3): 873-878.

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Influence of Seed Sludge on the Reactivation of Aerobic Sludge Granular After Storage

SONG Zhi-wei, CHENG Xiao-xia, QIAO Yan-yun, PAN Yu, LUO Ke-ji   

  1. School of Resource and Environmental Engineering, Heilongjiang Institute of Science and Technology, Harbin150027, China
  • Received:2010-04-13 Online:2011-05-26 Published:2011-05-26

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Abstract:

In order to investigate the influence of seed sludge on the stability of aerobic granular sludge, aerobic granules which was cultivated using different kinds of seed sludge were restarted in sequencing batch airlift reactor after a prolonged storage period, the influence of seed sludge on the properties and microbial community of aerobic sludge granular were studied. The results showed that seed sludge had some effect on the stability of aerobic granular, the morphology of aerobic granular developed using activated sludge taken from beer wastewater treatment plant, which has better settle-ability and biological activity,  can recover quickly after 35 d restarting,  its settleability reached 93% of fresh aerobic granular, and its removal rate of COD,NH3-N was similar to that of aerobic granular cultivated  using activated sludge taken from domestic wastewater treatment plant, but its removal rate of TP was better, they were 95.10%,91.80% and 94.00% respectively. DGGE profiles indicated that the microbial community diversity was abundant for seed sludge from beer wastewater treatment plant with its dominant microbial species of 20 operational taxonomy units( OTUs), and even simple for seed sludge from domestic wastewater treatment plant with the dominant species of 11 OTUs.

Key words: aerobic granular sludge, seed sludge, stability, microbial community

CLC Number: 

  • X703.1
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