Biosolids 101: Understanding the Pathogen Classes

摘要

Every day, more than 200 million American's flush their toilets, take showers, wash their dishes and perform many other normal tasks that feed the nation's sewer systems. Depending on its source, this raw wastewater can be fairly benign in nature or dangerously hazardous to human health and the environment. Dually responsible for handling the wastewater influent and preventing the degradation of natural resources by delivering a clean effluent, publicly owned treatment works (POTW) treat billions of gallons of wastewater per year. Since the implementation of the Clean Water Act in the 1970s, the standards for treatment of wastewaters have become significantly more stringent.