Rooden et al. (1995) described the treatment of a concentrated mixture (67.8 g/l COD) of black and white photographic wastewaters, containing thiosulfate (45.5 g/l), sulfate (8.0 g/l), and sulfite
(3.5 g/l) in addition to a high salt (95 mS/cm) and ammonium (14.2 g/l) content.