...
Introduction and Objectives
Methods
Results
The team had difficulty finding the correct alum dose at low temperatures and incoming turbidity this semester. The team determined a relationship between the WFP's PAC (polyaluminum chloride) dosage and the alum dose at the plant. The composition of PAC is a trade secret and its chemical formula is unknown. The relationship was determined between the percent active ingredients in PAC and alum. At the plant 48.8% of 11.1 lb/gal alum is active and 33% of 10.84 lb/gal of PAC is active. Therefore 1 ppm of PAC should have the same effects on flocculation as 0.182 mg/L alum.
...