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- Title
Microbial Fouling of a Reverse Osmosis Municipal Water Treatment System.
- Authors
Wright, Steven J.; Semrau, Jeremy D.; Kenney, David R.
- Abstract
Microbial fouling of a municipal water treatment system using reverse osmosis was investigated. From a combination of growth and molecular assays, it was discovered that the prefilter unit concentrated and facilitated microbial growth, and such growth led to microbial fouling of the reverse osmosis unit. Few cells were observed in the prefilter influent, but substantial microbial contamination was observed in the prefilter effluent, and this correlated with increasing headloss across the prefilter. The effluent caused microbial fouling of the leading elements of the reverse osmosis unit, as determined by reduced permeate flow, analysis of the elements, and assays of the membrane foulant. Both the introduction of microorganisms to the reverse osmosis unit from the prefilter unit and headloss across the prefilter could be effectively controlled through cleansing of the prefilter housing unit with sulfuric acid. Such treatments must be performed at appropriate intervals to prevent subsequent microbial growth in the prefilter unit.
- Subjects
FOULING; OSMOSIS; WATER purification; MICROBIAL contamination; MICROORGANISMS; WASTEWATER treatment
- Publication
Water Environment Research (10614303), 2008, Vol 80, Issue 8, p703
- ISSN
1061-4303
- Publication type
Article
- DOI
10.2175/106143008X276697