An article by Donohue’s Eric Lynne, Leon Downing, and Bill Marten in the January 2015 issue of “WE&T” (Water Environment & Technology) magazine examines the expectations for disc filtration systems through testing at numerous facilities. Nutrient regulations across the U.S. are trending toward lower and lower phosphorus levels, which means that many facilities could be facing major improvements to maintain compliance. For several communities these impending regulations have prompted them to take the initiative to conduct demonstration testing of different types of technologies, such as disc filters and ballasted flocculation. This article examines the overall results and the cost results from ten facilities that conducted demonstration testing during 2- to 3-week periods.
Read the full article in the January 2015 issue of “WE&T” magazine (login required).
Eric Lynne is a professional engineer in Donohue’s Sheboygan office, Leon Downing is a senior process engineer in Donohue’s Sheboygan office, and Bill Marten is a senior process engineer in Donohue’s Milwaukee office.
Image caption: Secondary effluent (left) and conditioned filer influent (right) samples illustrate the need to precipitate and flocculate phosphorus prior to filtering for best performance.