Problem: Raw manure from dairy operations challenged a Wisconsin county, creating significant nutrient runoff, digestate transportation expense, and the risk of anaerobic degradation in the open lagoons, emitting methane and contributing to global climate change.
Solution: After laboratory and pilot scale studies the Scepter technology from Graver Technologies was chosen. This crossflow filtration technology combines 316 L porous stainless-steel tubes with a sinter-bonded titanium oxide membrane. Modules were incorporated to concentrate the solids from the digester. The technology withstands the aggressive cleaning and provides long-term economical operation.
Result: Scepter is deployed in a state-of-the-art treatment plant designed to process nearly 1 mgd
