Table 3.8 Treatment processes and on-site controls for designated uses of recycled water from treated sewage Log Indicative treatment process Log On-site preventive measures Expo- Water quality objectivesc reduction reductions sure targets achievable reduct- ionb (V, P, B)a by treatment (V, P, B) Use Dual reticulation, toilet flushing, washing machines, garden use — treatment required, such as: cross-connection controls required Could include turbidity criteria for 5.0 6.5 • including ongoing education of filtration, disinfectant Ct or dose (UV) secondary, coagulation, filtration 5.0 5.0 • householders and plumbers and disinfection <1 per 100 mL E. coli 5.0 • secondary, membrane filtration, • To be determined on UV light • basis depending on technologies 6.5 Use Dual reticulation outdoor use only indoor use only or — — treatment required; for cross-connection controls Could include turbidity criteria for 6.0 • example: required, including ongoing education of filtration, disinfectant Ct or dose (UV) 4.5 6.0 householders and plumbers secondary, coagulation, filtration <1 per 100 mL E. coli • 5.0 4.5 • and disinfection 5.0 To be determined on secondary, membrane filtration, • • basis depending on UV light van technologies Municipal use open spaces, sports grounds, golf courses, dust suppression, etc unrestricted access and application or — To be determined on 5.0 basis depending on secondary, coagulation, filtration 3.5 • technologies and disinfection 4.0 Could include turbidity criteria for secondary, membrane filtration, • • filtration, disinfectant Ct or dose (UV) UV light <1 per 100 mL E. coli • van 5.0 3.5 4.0 N for s p •
Table 3.8 Treatment processes and on-site controls for designated uses of recycled water from treated sewage Log Indicative treatment process Log On-site preventive measures Expo- Water quality objectivesc reduction reductions sure targets (V, P, B)a achievable by reduct- ionb treatment (V, P, B) Use — Dual reticulation, toilet flushing, washing machines, garden use 6.5 5.0 5.0 treatment required, such as: • secondary, coagulation, filtration and disinfection • secondary, membrane filtration, UV light 6.5 5.0 5.0 cross-connection controls required including ongoing education of householders and plumbers • To be determined on basis depending on technologies • Could include turbidity criteria for filtration, disinfectant Ct or dose (UV) • E. coli <1 per 100 mL Use — Dual reticulation — outdoor use only or indoor use only 6.0 4.5 5.0 treatment required; for example: • secondary, coagulation, filtration and disinfection • secondary, membrane filtration, UV light 6.0 4.5 5.0 cross-connection controls required, including ongoing education of householders and plumbers • To be determined on basis depending on technologies • Could include turbidity criteria for filtration, disinfectant Ct or dose (UV) • E. coli <1 per 100 mL Municipal use — open spaces, sports grounds, golf courses, dust suppression, etc or unrestricted access and application 5.0 3.5 4.0 for • secondary, coagulation, filtration and disinfection • secondary, membrane filtration, UV light 5.0 3.5 4.0 • To be determined on basis depending on technologies • Could include turbidity criteria for filtration, disinfectant Ct or dose (UV) • E. coli <1 per 100 mL N s p van van
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