shows the changes in the EPS content of the activated sludge during a 108-day run. Polysaccharides and protein concentration increased (from Day 7) and peaked at 135.0 mg/g MLVSS and 82.4 mg/g MLVSS respectively at Day 35. This increase could be due to the elevated saline conditions in the bioreactor. It has long been reported that microorganisms respond to salt stress by increased endogenous respiration, accompanied by the secretion of organic cellular constituents