A soap and detergent factory produces 500m/day of wastewater from processing (BOD5 = 600mg/L suspended solids = 300mg/L) and 1000m/day from bottle washing (BOD5 = 15 mg/L; suspended solids = 40 mg/L). The treatment process used for combined wastewater is given in Figure 1. i) Briefly explain the use of: a) Equalization tank b) Sand/mixed media c) Carbon adsorption ii) Suggest a simple waste minimization program. RAW WASTE EQUALIZA. TION OIL & GREASE REMOVAL SLUDGE & OIL OUT GREASE & OIL RECOVERY COAGULATION - SEDIMENTATION SLUDGE ALTERNATE TO REGENERATION BIOCONVERSION SLUDGE RECYCLE SLUDGE CONDITIONING AND DISPOSAL CARBON ADSORPTION SEDIMEN. TATION FROM REGENERATION EFFLUENT SLUDGE WASTE BRINE REVERSE OSMOSIS ION EXCHANGE SAND OR MIXED MEDIA FILTRATION. Figure 1. Flowchart of a treatment system for a soap and detergent industry plant FINAL EFFLUENT