Introduction –
Objectivesof wastewater treatment system,Need for sanitation, classification of sewerage systems, dry weather and wet weather flow, factors affecting dry weather flow and wet weather flow, Design of sewers. Characteristics of waste water and flowvariations. Types of reactors and reactors analysis.
Primary Treatment of wastewater-
Flow chart on Community waste water treatment system, screenings, grit chamber, Oil and Grease removal,Aeration, Equalization basin, primary and secondary settling tanks and design.
Bio-kinetic coefficients–
Definition, Significance in Biological treatment and their determination.
Wastewater Treatment –
Aerobic and Anaerobic treatment methods.
Theoretical principles and design considerations;suspended growth system-
Conventional activated sludge process and its modifications.
Attached growth system–
Trickling filters, Bio-towers and Rotating Biological contactors.
Sludge Processing –
Separation - sludge thickeners, volume reduction, conditioning and digestion – aerobic and anaerobic.Principles and design of stabilization ponds. Nitrification and De-nitrification Processes, Phosphorous removal. Wastewater disinfection.
Role of microorganisms in wastewater treatment -
Degradation of Carbonaceous and Nitrogenous matter, high concentrated toxic pollutants.
Rural wastewater systems –
Septic tanks, two-pit latrines, Eco-toilet, soak pits.