Part 2: Phosphorus recovery technologies

Abstract

Dairy farms are looking for ways to further partition and recover concentrated nutrient components of nitrogen, phosphorus, and potassium, from manure that has been preprocessed, typically with anaerobic digestion and/or initial manure separation. Advanced manure treatment technologies for phosphorus recovery including sequential screens, struvite crystallization, enhanced biological phosphorus removal, and ultrafiltration are described and their relative costs and efficiencies compared.