Cleaning fouled membranes using sludge enzymes

Melamane, Xolisa Lorraine and Pletschke, B.I. and Leukes, W.D. and Whiteley, C.G. (2002) Cleaning fouled membranes using sludge enzymes. Water SA, 28 . pp. 100-104. ISSN 0378-4738



Official URL:


Maintenance of membrane performance requires inevitable cleaning or "defouling" of fouled membranes. Membrane cleaning using sludge enzymes, was investigated by first characterising ostrich abattoir effluent for potential foulants, such as lipids, proteins and polysaccharides. Static fouling of polysulphone membranes using abattoir effluent was also performed. Biochemical analysis was performed using quantitative and qualitative methods for detection of proteins on fouled and defouled membranes. The ability of sulphidogenic proteases to remove proteins adsorbed on polysulphone membranes and capillary ultrafiltration membranes after static fouling, and ability to restore permeate fluxes and transmembrane pressure after dynamic fouling was also investigated. Permeate volumes were analysed for protein and amino acids concentrations. The abattoir effluent contained 553 μg/ml of lipid, 301 μg/ml of protein, 141 μg/ml of total carbohydrate, and 0.63 μg/ml of total reducing sugars. Static fouled membranes removed 23.4% of proteins. Defouling of dynamically fouled capillary ultrafiltration membranes using sulphidogenic proteases was successful at pH 10, 37°C, within 1 h. Sulphidogenic protease activity was 2.1 U/ml and Flux Recovery (FR%) was 64%.

Item Type:Article
Additional Information:Special Edition of Water SA, WISA Conference 2002
Uncontrolled Keywords:wastewater treatments; abattoir wastes; enzyme activity; membrane processes; proteases; ultrafiltration membranes; process evaluation; polysulphone membranes; membrane performance; membrane fouling; membrane cleaning; transmembrane pressure; permeate flux; sulphidogenic proteases
Subjects:Y Unknown > Subjects to be assigned
Divisions:Faculty > Faculty of Science > Biochemistry, Microbiology & Biotechnology
ID Code:1373
Deposited By: Mrs Eileen Shepherd
Deposited On:15 May 2009
Last Modified:09 Jan 2013 12:28
304 full-text download(s) since 15 May 2009
89 full-text download(s) in the past 12 months
More statistics...

Repository Staff Only: item control page