李志华 Likes:

Affiliation of Author(s):

环境与市政工程学院

Journal:

Enzyme and Microbial Technology

Key Words:

中文关键字：好氧颗粒; 胞外多聚物; 活性污泥，英文关键字：Aerobic granules; Extra-cellular polymer substance

Abstract:

The current study was to evaluate the influence of starvation phase on surface negative charge, relative hydrophobicity, extra-cellular polymer substances (EPS) and the formation mechanism of aerobic granules. Granules with encouraging settling properties occurred in the reactor about 7 days after the inoculation. The surface negative charge decreased from 0.203 to 0.023 meq g VSS?1 and the relative hydrophobicity increased from 28.8 to 60.3% during the granulation period. Concentrations of protein and carbohydrate decreased from 18.0 to 7.1 and 7.0 to 2.9 mg g VSS?1, respectively in the first period. And from day 13, those values were observed in the range of 5.8–8.6 and 2.9–5.6 mg g VSS?1, respectively. The EPS especially protein concentrations well correlated with surface charge and relatively hydrophobicity. It was concluded that a reasonable amount of EPS should be controlled to form and maintain aerobic granules. It was proposed that aerobic granulation was initiated by starvation phase and then enhanced by anaerobic metabolism.

Note:

李志华

Co-author:

Kuba,T.,KusudaT

First Author:

lizhihua

Indexed by:

Journal paper

Volume:

卷：38

Issue:

期：5

Page Number:

页：670-674

Translation or Not:

no

Date of Publication:

2006-03-01