Washington’s besieged dairies are testing several promising systems for recycling cow manure, turning it into fertilizer and clean water. To do that, engineers are using processes that range from oversize bins of worms to cutting-edge technologies to reduce and reuse the nitrogen and phosphorous found in manure. Each system has pros and cons for farmers weighing capital and operational costs versus the cost of doing nothing. No single approach will suit every dairy, said Eric Powell, business development director for Regenis, a Ferndale, Wash., company and ABC member collaborating with dairies in Whatcom and Yakima counties. More >>