Water Supply Vol 5 No 3-4 pp 227–232 © IWA Publishing 2005
Filtration of biological suspension: membrane performance
S. Delgado*, F. Díaz**, R. Villarroel***, M.D. García****, L. Vera*****, N. Regalado****** and E.B. Pérez*******
*Department of Chemical Engineering, Faculty of Chemistry, University of La Laguna, Av. Astrof Fco. Sanchez s/n. 38200 La Laguna, Spain, (E-mail: sdelgado@ull.es)
**Department of Chemical Engineering, Faculty of Chemistry, University of La Laguna, Av. Astrof Fco. Sanchez s/n. 38200 La Laguna, Spain, (E-mail: sdelgado@ull.es)
***Department of Chemical Engineering, Faculty of Chemistry, University of La Laguna, Av. Astrof Fco. Sanchez s/n. 38200 La Laguna, Spain, (E-mail: sdelgado@ull.es)
****Department of Chemical Engineering, Faculty of Chemistry, University of La Laguna, Av. Astrof Fco. Sanchez s/n. 38200 La Laguna, Spain, (E-mail: sdelgado@ull.es)
*****Department of Chemical Engineering, Faculty of Chemistry, University of La Laguna, Av. Astrof Fco. Sanchez s/n. 38200 La Laguna, Spain, (E-mail: sdelgado@ull.es)
******Department of Chemical Engineering, Faculty of Chemistry, University of La Laguna, Av. Astrof Fco. Sanchez s/n. 38200 La Laguna, Spain, (E-mail: sdelgado@ull.es)
*******Department of Chemical Engineering, Faculty of Chemistry, University of La Laguna, Av. Astrof Fco. Sanchez s/n. 38200 La Laguna, Spain, (E-mail: sdelgado@ull.es)
ABSTRACT
Wastewater reuse provides a substantial non-conventional water resource, mainly for agriculture. However, it requires appropriate treatment technologies and previous evaluation so as to meet quality requirements imposed by government regulations and crop needs. Among all the technologies applied to wastewater treatment, membrane-based systems have gained increasing importance, although their main drawback is progressive membrane fouling, which affects process efficiency enormously. The present study analyses the filterability of some biological suspensions as well as the influence of several variables in membrane fouling. Classic dead-end filtration models are used in an attempt to better understand fouling mechanisms and develop methods to prevent or retard it. Keywords Fouling; hollow fiber membrane; ultrafiltration
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