Activity and structure of stored aerobic granules

被引:48
作者
Adav, S. S. [1 ]
Lee, D-J. [1 ]
Tay, J. H. [2 ]
机构
[1] Natl Taiwan Univ, Dept Chem Engn, Taipei 10617, Taiwan
[2] Nanyang Technol Univ, Inst Environm Sci & Engn, Singapore 639798, Singapore
关键词
granule structure; confocal laser scanning microscope; phenol degradation; EXTENDED IDLE CONDITIONS; ACTIVATED-SLUDGE; PRESERVATION; FLOC;
D O I
10.1080/09593332808618883
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This study investigates how storage temperatures and periods under extended idle conditions affected the stability and activity of granules, that have a high phenol-degrading capability. The granule activity increased as storage temperature decreased, and declined as storage time increased. Granules stored with pure water at room temperature (20.8 +/- 5.6 degrees C) lost stability after three months storage. Particularly, granules stored with 500 mg l(-1) phenol solution demonstrated high phenol degradation capability following storage. Further, storage at subfreezing temperatures (-20 degrees C) is an ideal way of preserving stability and activity of phenol-fed granules. Anaerobic degradation of proteins in granule core by obligate anaerobic strain such as Bacteroides sp. corresponded to the stability loss of stored granules.
引用
收藏
页码:1227 / 1235
页数:9
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