Selective force and mature phase affect the stability of aerobic granule: An experimental study by applying different removal methods of sludge

Z. H. Li, Takahiro Kuba, T. Kusuda

研究成果: ジャーナルへの寄稿学術誌査読

32 被引用数 (Scopus)

抄録

To evaluate the effect of sludge removal methods on the stability of aerobic granules, three different removal methods of sludge were investigated in sequencing batch reactors (SBR). Results demonstrated that (i) in R1, removing fresh granules effectively maintained granules with sizes of 1-2 mm and SVI of 31-45 ml g-1 for more than 432 cycles (one cycle length was 3 h); (ii) in R3, removing aged granules led to disintegration of granules; (iii) in R2, removing completely mixed sludge resulted in granules with good settleability. However, the morphology of granules in R2 was similar to that of granules in R3 with sizes of about 4-5 mm. It was also found that removing fresh granules built up more ash solids in granules than removing aged granules did and removing aged granules significantly led to lysed granules with void shells. Results suggest that removing fresh granules is an effective approach of selective force for aerobic granulation, and the mature phase plays an important role on the stability of granules by rearranging granule structure (e.g. the buildup of ash solids).

本文言語英語
ページ(範囲)976-981
ページ数6
ジャーナルEnzyme and Microbial Technology
39
5
DOI
出版ステータス出版済み - 9月 4 2006

!!!All Science Journal Classification (ASJC) codes

  • 生化学
  • バイオテクノロジー
  • 応用微生物学とバイオテクノロジー

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