Title
Micro-organism rejection by membrane systems
Abbreviated Journal Title
Environ. Eng. Sci.
Keywords
membranes; nanofiltration; microfiltration; ultrafiltration; disinfection; rnicro-organism; Clostridium perfringens; Cryptosporidium; parvum oocysts; Giardia lamblia cysts; log rejection; WATER; PERFORMANCE; CRYPTO; Engineering, Environmental; Environmental Sciences
Abstract
The removal of micro-organisms by membrane systems was investigated using single-element membranes and five species of micro-organisms I in a plant setting at East St. Louis, MO. Single-element membranes included a cellulose acetate ultrafilter (UF), a polysulfone microfilter (MF), a cellulose acetate (CA) nanofilter (NF), and two composite thin-film (CTF) nanofilters. Micro-organism challenge studies were conducted using raw, alum coagulated-settled, and finished plant water. Model micro-organisms consisted of Clostridium perfringens (strain 26) spores (similar to 1-5 mum) for bacteria simulation, MS-2 (similar to0.025 mum), and PRD-1 (similar to0.1 mum) phage for virus rejection and Cryptosporidium parvum oocysts (similar to4-6 mum) and Giardia lamblia cysts (similar to8-14 mum) for cyst rejection. Sixty-eight observations of micro-organism rejection were gathered over 1 year of operation in eight separate challenge events where micro-organisms were spiked separately and as a mixture. The composite thin-film nanofilters provided significantly better disinfection than the cellulose acetate nanofilter. However, a cellulose acetate ultrafilter rejected more micro-organisms than any membrane tested, indicating disinfection by cellulose acetate membranes is a function of construction and module configuration rather than membrane film, as both the CA and CTF membranes were constructed in a spiral wound configuration. Micro-organism log rejection was independent of organism size except for the MF, which,passed viruses, and was independent of membrane material but varied among membranes.
Journal Title
Environmental Engineering Science
Volume
19
Issue/Number
6
Publication Date
1-1-2002
Document Type
Article
Language
English
First Page
453
Last Page
465
WOS Identifier
ISSN
1092-8758
Recommended Citation
"Micro-organism rejection by membrane systems" (2002). Faculty Bibliography 2000s. 3336.
https://stars.library.ucf.edu/facultybib2000/3336
Comments
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