Brown and Caldwell announced in June that it had been hired to work with the Portland Water District in Maine to develop a master plan evaluating current and future biosolids management.
Costs associated with biosolids disposal have risen 44% in the past two years, due to rising landfill disposal fees, as well as evolving regulations relating to emerging contaminants such as per- and polyfluoroalkyl substances (PFAS), according to PWD.