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| PROJECTS: Water Factory 21 - Overview | Treatment Process | WF21 Costs | Water Quality | Virtual Tour | Tours |
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WF21 Treatment Process: RECARBONATION  The purpose of the recarbonation basin is to neutralize the pH of the highly alkaline water produced during chemical clarification. Off gases, containing carbon dioxide gas, are recovered from the lime recalcining furnace stack. They are added in asingle stage to lower pH between 6.5 and 7.0. basins. |
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| The recarbonation basins also serve as chlorine contact basins. Generally, five to 10mg/L of chlorine is added for partial disinfection and algae control.
Detention time in the recarbonation basin is about 70 minutes.
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