The critical flux method for reduced filter membrane fouling when monitoring high-solids digesters

Tait, Stephan, Carney, Christopher R. and Batstone, Damien J. (2013) The critical flux method for reduced filter membrane fouling when monitoring high-solids digesters. Biotechnology Progress, 29 4: 1059-1063. doi:10.1002/btpr.1743


Author Tait, Stephan
Carney, Christopher R.
Batstone, Damien J.
Title The critical flux method for reduced filter membrane fouling when monitoring high-solids digesters
Journal name Biotechnology Progress   Check publisher's open access policy
ISSN 8756-7938
1520-6033
Publication date 2013-07-01
Year available 2013
Sub-type Article (original research)
DOI 10.1002/btpr.1743
Volume 29
Issue 4
Start page 1059
End page 1063
Total pages 5
Place of publication Hoboken, NJ United States
Publisher Wiley-Blackwell Publishing, Inc.
Language eng
Formatted abstract
Membrane fouling currently makes filtration of high-solids anaerobic sludges difficult and this is discouraging online monitoring of volatile fatty acids and control of high-solids digesters. The present study tests the critical flux approach to reduce membrane fouling. Filtration tests are performed on two sludges, filtered via a side-stream off two full-scale digesters. Sub-critical flux operating conditions (for minimal cake layer formation) are identified for each of the sludges and the filtration units are operated at these conditions to assess longer term performance. Results for one of the sludges (co-digested primary and secondary sludge) is found to be encouraging, showing that sufficient flux rates (up to 40 L m−2 h−1) can be readily sustained to allow longer term digester monitoring and control. Filtration performance for this sludge did not deteriorate significantly over the test period. Results for the other test sludge (digested thermally hydrolyzed waste activated sludge) were not as favorable and indicated that application may be limited for very high solids digesters (>5% total solids concentration). Differences in filtration behavior for the two test sludges were ascribed to the presence of complex soluble organics, the concentration of sludge solids and their particle size.
Keyword Anaerobic digestion
Monitoring and control
Filtration
Critical flux
Activated sludge
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
Advanced Water Management Centre Publications
 
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