The book provides the requisite details on Performance Analysis of an Effluent Treatment Plant of Sugar industry under normal working conditions. A computer application based on Visual Basic.NET has been created which helps in operation & maintenance of existing Effluent Treatment Plant and it also helps in the design of new Effluent Treatment Plant. This book also emphasizes on various Bio-kinetic coefficients which are responsible for treating the industrial wastewater in Biological treatment. Variation in Re-circulation ratio for Activated Sludge Process has been analysed and optimum values of Bio-kinetic coefficients were determined.