| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 623986 | Desalination | 2013 | 8 Pages |
•Effect of gradual loading of salt concentration on organic in MBR.•Effect of salt concentration on SOUR by microorganism•Organic characterization with different salt concentration.•Cluster analysis of the effect of salt concentration on organic removal.
The gradual increase of salt concentration (0 to 35 g-NaCl/L) on the performance of membrane bioreactor (MBR) was studied. The uptake rate of dissolved organic carbon and ammonia decreased from around 17.0 mg-DOC/g-MLVSS.d to 1.8 mg-DOC/g-MLVSS.d and from 8.2 mg-NH4-N/g-MLVSS.d to 0 mg-NH4-N/g-MLVSS.d respectively when salt concentration reached to 35 g-NaCl/L. Similarly the specific oxygen uptake rate (SOUR) reduced from 8 to 9 to around 0.3 mg-O2/g-MLVSS.h. The removal of bio-polymers, humic acids, building blocks and low molecular weight neutral decreased with increase in salt concentration. The concentration of dissolved organic nitrogen (DON) in bio-polymer increased from 0.05 to 3.31 mg/L when the salt concentration reached to 35 g-NaCl/L. This study provides good information for understanding the effect of continuous increase of salt concentration in treating saline wastewater in a MBR process.
