Lime Use in Wastewater Treatment: Design and Cost Data
In Studies at Blue Plains, O'Farrell^S found that two-stage recarbonation in raw sewage coagulation at a pH of 11.4 to 11.7 resulted in sludge production of 0.9 kg/cu m (7.5 lb/1000 gallons); when lime and iron were used at a pH of 10.5, only 0.4 to 0.5 kg/cu m (3.5 to 4.0 lb/1000 gallons) of sludge was obtained.
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