· Homework: FRQ 2007.1 Sewage Treatment Process Research: Name two components that are targeted for removal by primary treatment and two components that are targeted for removal for secondary treatment. For each pollutant, describe how the pollutant is removed in the treatment process. How do sewage treatment plants create a solid waste problem? Describe an environmental problem for disposing of solid waste by transporting it to a landfill. What is an environmental problem for disposing solid waste by spreading it onto agricultural land. During the final stage of disinfection at a sewage treatment plant, what are two pollutants that are targeted during disinfection and what are two commonly used methods of disinfection?