Journal
WATER SCIENCE AND TECHNOLOGY
Volume 66, Issue 7, Pages 1424-1430Publisher
IWA PUBLISHING
DOI: 10.2166/wst.2012.307
Keywords
acylase; biofouling; Pseudomonas putida; quorum sensing; reverse osmosis (RO) membrane
Funding
- Korea Science and Engineering Foundation (KOSEF)
- Ministry of Education, Science and Technology (MEST) [R01-2006-000-10946-0]
- Ministry of Land, Transport and Maritime Affairs (MLTM) through the Seawater Engineering & Architecture of High Efficiency Reverse Osmosis (SEAHERO) Program
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Biofouling control by quorum sensing (QS) inhibition and the influence of membrane surface characteristics on biofilm formation and QS inhibition were investigated. Pseudomonas putida isolated from the bio-fouled reverse osmosis (RO) membranes in a real plant was used. Acylase was chosen as a model QS inhibitor. Bacteria on the membrane coupons were quantified with the heterotrophic plate count method. Cell distribution was imaged by a confocal laser scanning microscope. Results showed that biofilm formation on the membrane was reduced by acylase as it inhibits the activity of N-acylhomoserine lactone (AHL) which is a signal molecule of QS. It was also shown that membrane surface characteristics were influential factors affecting bacterial adhesion, biofilm formation, and QS inhibition.
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