After four years, Delphos, Ohio's new combined sewer system using membrane bioreactors is scheduled to go online this month. The city also has 12 million gallons of stormwater-holding capacity in two lagoons that can be pumped back to the plant in dry weather. Photo: Peterson Construction Co.
Idaho innovator Hank Day. Since the Star Sewer and Water District's membrane bioreactor went online Jan. 1, three other cities in Idaho have decided to incorporate the technology into their wastewater treatment plants.