Brief Facility Description and Summary of Proposed Changes: Madeline Sanitary District owns and operates a domestic wastewater treatment system designed to treat 163,000 gallons per day.目前,他们平均每天治疗58,000加仑。治疗系统包括一个精细的屏幕,以从进水和牵引废物中去除固体。废水然后使用浮动窗帘挡板系统流入两个覆盖的泻湖,分为四个区域。废水代谢中存在自然存在的微生物并减少有机物。A fine bubble aeration system supplies oxygen and provides mixing to provide contact between microorganisms, organic matter and submerged fixed film media curtains (BioReef) which increases the removal of BOD and nitrogen.在将经过处理的废水排放到苏必利尔湖之前,紫外线消毒系统将在季节性使用(5月至10月)。