Cause and Control of Baulking Sludge by Microthrix Parvicella in MUCT System

The cause and control of bulking in modified University of Cape Town (MUCT) system were investigated. The results were as follows: (1) Low temperature is the main cause of excessive filamentous bacteria growth, and dominant filamentous bacteria was Microthrix parvicella in the sludge; (2) Biological...

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Bibliographic Details
Main Authors: Jun Yin, Xiao-Ling Wang, Xiang-Hui Wu, Long Ye
Format: Conference Proceeding
Language:English
Subjects:
Biological control systems
Civil engineering
Control systems
Effluents
Inductors
Microorganisms
Plants (biology)
Sludge treatment
Temperature distribution
Wastewater treatment
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Summary:The cause and control of bulking in modified University of Cape Town (MUCT) system were investigated. The results were as follows: (1) Low temperature is the main cause of excessive filamentous bacteria growth, and dominant filamentous bacteria was Microthrix parvicella in the sludge; (2) Biological techniques such as reducing sludge retention time (SRT) and increasing temperature could decrease sludge volume index (SVI) and control bulking; (3) The removal efficiency of COD was constantly higher than 92.4%, and the removal efficiency of TP ranged between 87.4 and 98.0% during experiment, but percentage of TN removal decreased to about 42.2% due to used the lower SRT (6d) after 9 Nov 2006.
ISSN:2151-7614
2151-7622
DOI:10.1109/ICBBE.2009.5162478