Journal
BIORESOURCE TECHNOLOGY
Volume 128, Issue -, Pages 586-592Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.11.005
Keywords
Membrane bioreactor (MBR); Membrane fouling; Sludge aggregation; Extended DLVO theory
Funding
- National Natural Science Fund of China [50978071]
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology [2011DX01]
- National Science Foundation of China [50821002]
Ask authors/readers for more resources
In order to obtain a better understanding of the relationship between sludge characteristics and the cake formation in membrane bioreactors (MBRs), the characteristics of cake sludge and bulk sludge were investigated and compared. Based on the extended Derjaguin-Landau-Verwey-Overbeek (extended DLVO) theory, the aggregation abilities of cake sludge and bulk sludge were also evaluated. It is observed that cake sludge showed worse aggregation ability than bulk sludge. Further analysis indicated that small flocs, colloids, loosely bound extracellular polymeric substances (LB-EPS), hydrophobicity and negative charge played important role in cake formation and sludge aggregation. Cake sludge with worse aggregation had higher distribution spread index (DSI), more colloids and LB-EPS, higher hydrophobicity and more negative charge. The results indicated that sludge aggregation might reflect membrane fouling potential of sludge. (C) 2012 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available