The Effect of Mechanical Agitation on the Stripping of Bio-Film from Ceramic Particles

Author

Jiang, Bo ; Pei, Haiyan ; Hu, Wenrong

Author_Institution

Sch. of Environ. Sci. & Eng., Shandong Univ., Jinan, China

fYear

2010

fDate

18-20 June 2010

Firstpage

1

Lastpage

4

Abstract

The effects of mechanical agitation on the stripping of attached-growth bio-film from ceramic particles were studied under the conditions of different agitating speeds and durations. The results indicated that the stripping efficiency of bio-film was increased with the increase of agitating speed. The highest stripping efficiencies at the low, middle and high speeds of 300, 600 and 1200 rpm/min were 16.8, 27.4 and 48.8% respectively. The increase of agitating duration can increase the stripping efficiency of bio-film. However, as the duration exceeded 90 minutes, the increase of stripping efficiency for three speeds shows no obvious change. The variation of mass fraction of small floc and the productivity of polysaccharide and protein in suspension revealed that mechanical agitation also gave rise to the release of extra-polymer substance and the disaggregation of the stripped bio-film at the time of improving the stripping efficiency of bio-film.

Keywords

ceramics; filtration; maintenance engineering; wastewater treatment; agitating duration; agitating speeds; biofilm removal; biological aerated filter; ceramic particles; disaggregation; mechanical agitation; polysaccharide; protein; stripping efficiency; wastewater treatment; Ceramics; Chemicals; Cities and towns; Contamination; Filters; Productivity; Protection; Proteins; Strips; Wastewater;

fLanguage

English

Publisher

ieee

Conference_Titel

Bioinformatics and Biomedical Engineering (iCBBE), 2010 4th International Conference on

Conference_Location

Chengdu

ISSN

2151-7614

Print_ISBN

978-1-4244-4712-1

Electronic_ISBN

2151-7614

Type

conf

DOI

10.1109/ICBBE.2010.5517229

Filename

5517229