State regulatory agencies are ratcheting down nutrient limits for wastewater treatment plants, notably limits on phosphorus. Reaching extremely low phosphorus limits is especially challenging for lagoon systems.
To help demonstrate the levels to which phosphorus can be removed cost-effectively, Pat Morrow, P.E., of MSA Professional Services, headquartered in Baraboo, Wis., conducted a pilot study of treatment by alum addition at the O’Dell’s Bay (Wis.) Wastewater Treatment Facility, a 30,000 gpd (average) covered lagoon facility.
Morrow, who is a certified Wisconsin wastewater operator (Grade 2 activated sludge, disinfection, and Special K-Recirculating Sand Filters) talked about his study design and results in an interview
