This reference manual will help municipal utility owners and operators, state permit writers and regulators plan cost-effective nutrient removal projects for municipal wastewater treatment facilities. v.1 Detailed technical and cost information about both biological and physiochemical treatment technologies. It includes detailed process descriptions and operating factors for processes that can remove nitrogen, phosphorus, or both from municipal wastewater. Also includes data on process performance and reliability. v.2 Nine in-depth facility studies that examine the factors involved in successful process design and operation, and cost analysis.