The plant currently uses “activated sludge treatment,” a process in which microorganisms and air are introduced into partially treated wastewater in a series of tanks. The microorganisms feed on the organic matter in the water, making it cleaner. The plan calls for switching to a “five-stage Bardenpho” process, a more extensive treatment using other types of microorganisms and a different array of tanks.
The project’s other renovations, many of which would be needed to bring the plant up to code, include replacing the electrical system; adding new valves, pipes, and pumps; taking measures to make the plant more handicapped accessible; and installing fire sprinklers.
Goldman said the most difficult aspect of the project would be keeping the plant in operation during construction.
“You are basically going to be building a new plant around an old one while it’s running,” he said. “It’s going to be a major challenge.”
John Laidler can be reached at email@example.com.