Page 312 - Water and wastewater engineering
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Softened water to disinfection, storage, and distribution system Softened water to disinfection, storage, and distribution system
Softened water to disinfection, storage, and distribution system Granular media filtration Filter washwater Waste washwater to water recovery system or disposal Filter washwater
Filter washwater Solids to dewatering Granular media filtration Waste washwater to water recovery system or disposal
Granular media filtration Waste washwater to water recovery system or disposal CO 2 Recarbonation Recarbonation Solids to dewatering
(a) CaCO 3 sludge (b) CO 2 (c) Process flow diagrams of common softening treatment techniques: (a) single-stage lime treatment; (b) two-stage excess lime-soda treatment; (c) split-flow lime
Recarbonation Solids to dewatering Soda CaCO 3 sludge
CO 2 Soda
CaCO 3 sludge
Lime Raw water Recarbonation Solids to dewatering
CO 2 CaCO 3 sludge
CaCO 3 sludge Lime Raw water
Lime Raw water FIGURE 7-13 treatment.
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