Treatment of laundry wastewater using extracellular polymeric substances (EPS)

Abstract The problem of management and treatment wastewater from commercial laundries is a matter concern. present study provides an effective eco-friendly solution to the in Quebec (Canada) by using extracellular polymeric substance (EPS) as bio-flocculant. EPS was produced valorization crude glycerol paper mill sludge bacterial strain (BS-04). Two different types EPS: Slime (S-EPS) Broth (B-EPS) were used for laundry (CLWW). This first CLWW bio-flocculant EPS. A comparison between conventional (LWW) chemical coagulants (FeSO 4 , CaCl 2 Alum) enhanced has been drawn study. Moreover, LWW combination also investigated. It observed that S-EPS (0.6 g/L) gave better flocculation activity (FA) than B-EPS. alone can remove 83.20% turbidity, 77.69% suspended solids (SS), 76.37% oxygen demand (COD). best results obtained combining with alum (300 mg/L) at pH 7 time 30 min. able 98% 95.42% SS, 83.08% COD LWW. When increased h 7, it resulted more 88% removal CLWW. Graphical