李志华 Likes:

Affiliation of Author(s):

环境与市政工程学院

Journal:

Journal of Environmental Sciences

Key Words:

中文关键字：好氧颗粒；污泥膨胀；热重量分析，英文关键字：aerobic granule; sludge bulking; filamentous micro

Abstract:

Proliferation of filamentous microorganisms frequently leads to operational failure for activate sludge systems. In this study, it was found that filamentous microorganisms could grow in compact granular structure with 5% sodium choride in the substrate. In the early period of experiment, coccoid and rode-like bacteria predominated in the yellowish-brown qranules, and later the white and the black granules were developed by filamentous microorganisms. The filamentous granules exhibited low porosity and fast settling velocity, and were more compact even than bacteria granules. It was hypothesized that the elevated pH in the later period might be a possible reason for the compact growth of filamentous granules. However, the bacteria granules showed the high bioactivity in terms of specific oxygen utilizing rate, and comprised of a wider diversity of compounds based on the thermogravimetric evaluation. The findings in this study demonstrated that filamentous microbes could form compact granular structure, which may encourage the utilization of filamentous microorganisms rather than the inhibition of their growth, as the latter is frequently used for sludge bulking control.

Co-author:

张婷

First Author:

王晓昌,lina,lizhihua

Indexed by:

Journal paper

Volume:

卷：22

Issue:

期：1

Page Number:

页：62-67

Translation or Not:

no

Date of Publication:

2010-01-01