Calculate the mass per day (kg/d) of lime (Ca(OH)2) that will be required to precipitate phosphorus in a wastewater with 6.5 mg P/L. The wastewater flow rate is 10,000 m3 /d and the goal effluent P concentration is 0.1 mg P/L. Assume complete dissociation of lime in the wastewater and that the precipitation reaction proceeds at 100% efficiency according to the stoichiometric reaction below.
102+ +6P 3− +2H− ↔ (P ) (H) (s)