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The effect of mixed liquor suspended solids (MLSS) on biofouling in a hybrid membrane bioreactor for the treatment of high concentration organic wastewater

Damayanti, A.; Ujang, Z.; Salim, M. R. and Olsson, Gustaf LU (2011) In Water Science and Technology 63(8). p.1701-1706
Abstract
Biofouling is a crucial factor in membrane bioreactor (MBR) applications, particularly for high organic loading operations. This paper reports a study on biofouling in an MBR to establish a relationship between critical flux, J(c), mixed liquor suspended solids (MLSS) (ranging from 5 to 20 g L-1) and volumetric loading rate (6.3 kg COD m(-3) h(-1)) of palm oil mill effluent (POME). A lab-scale 100 L hybrid MBR consisting of anaerobic, anoxic, and aerobic reactors was used with flat sheet microfiltration (MF) submerged in the aerobic compartment. The food-to-microorganism (F/M) ratio was maintained at 0.18 kg COD kg(-1) MLSSd(-1). The biofouling tendency of the membrane was obtained based on the flux against the transmembrane pressure (TMP)... (More)
Biofouling is a crucial factor in membrane bioreactor (MBR) applications, particularly for high organic loading operations. This paper reports a study on biofouling in an MBR to establish a relationship between critical flux, J(c), mixed liquor suspended solids (MLSS) (ranging from 5 to 20 g L-1) and volumetric loading rate (6.3 kg COD m(-3) h(-1)) of palm oil mill effluent (POME). A lab-scale 100 L hybrid MBR consisting of anaerobic, anoxic, and aerobic reactors was used with flat sheet microfiltration (MF) submerged in the aerobic compartment. The food-to-microorganism (F/M) ratio was maintained at 0.18 kg COD kg(-1) MLSSd(-1). The biofouling tendency of the membrane was obtained based on the flux against the transmembrane pressure (TMP) behaviour. The critical flux is sensitive to the MLSS. At the MLSS 20 g L-1 the critical flux is about four times lower than that for the MLSS concentration of 5 g L-1. The results showed high removal efficiency of denitrification and nitrification up to 97% at the MLSS concentration 20 g L-1. The results show that the operation has to compromise between a high and a low MLSS concentration. The former will favour a higher removal rate, while the latter will favour a higher critical flux. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
biofouling, flux, membrane bioreactor, MLSS, TMP
in
Water Science and Technology
volume
63
issue
8
pages
1701 - 1706
publisher
IWA Publishing
external identifiers
  • wos:000290431500021
  • scopus:79955854374
ISSN
0273-1223
DOI
10.2166/wst.2011.338
language
English
LU publication?
yes
id
6e829c37-153e-4b12-9d43-8746b9e2e6cc (old id 1986628)
date added to LUP
2011-06-29 11:16:33
date last changed
2017-10-01 04:19:38
@article{6e829c37-153e-4b12-9d43-8746b9e2e6cc,
  abstract     = {Biofouling is a crucial factor in membrane bioreactor (MBR) applications, particularly for high organic loading operations. This paper reports a study on biofouling in an MBR to establish a relationship between critical flux, J(c), mixed liquor suspended solids (MLSS) (ranging from 5 to 20 g L-1) and volumetric loading rate (6.3 kg COD m(-3) h(-1)) of palm oil mill effluent (POME). A lab-scale 100 L hybrid MBR consisting of anaerobic, anoxic, and aerobic reactors was used with flat sheet microfiltration (MF) submerged in the aerobic compartment. The food-to-microorganism (F/M) ratio was maintained at 0.18 kg COD kg(-1) MLSSd(-1). The biofouling tendency of the membrane was obtained based on the flux against the transmembrane pressure (TMP) behaviour. The critical flux is sensitive to the MLSS. At the MLSS 20 g L-1 the critical flux is about four times lower than that for the MLSS concentration of 5 g L-1. The results showed high removal efficiency of denitrification and nitrification up to 97% at the MLSS concentration 20 g L-1. The results show that the operation has to compromise between a high and a low MLSS concentration. The former will favour a higher removal rate, while the latter will favour a higher critical flux.},
  author       = {Damayanti, A. and Ujang, Z. and Salim, M. R. and Olsson, Gustaf},
  issn         = {0273-1223},
  keyword      = {biofouling,flux,membrane bioreactor,MLSS,TMP},
  language     = {eng},
  number       = {8},
  pages        = {1701--1706},
  publisher    = {IWA Publishing},
  series       = {Water Science and Technology},
  title        = {The effect of mixed liquor suspended solids (MLSS) on biofouling in a hybrid membrane bioreactor for the treatment of high concentration organic wastewater},
  url          = {http://dx.doi.org/10.2166/wst.2011.338},
  volume       = {63},
  year         = {2011},
}