UNIT 1. INTRODUCTION Introduction UNIT 2. POTABILIZATION Introduction Water quality Required treatment - Weter line Required treatmet - Sludge line UNIT 3. WASTEWATER PURIFICATION Introduction Primary treatment Intermediate treatment Secondary treatment Sludge treatment UNIT 4. PUMPS AND ROUGHING EQUIPMENT Introduction Pumps and pumping equipment Roughing equipment Mixers and aeration systems UNIT 5. MIXERS AND AERATION SYSTEMS Mixers and aeration systems UNIT 6. BRIDGES FOR TANKS AND AUXILIARY EQUIPMENT Bridges fot tanks Auxiliary equipment Silos and hoppers UNIT 7. EQUIPMENT FOR DEWATERING AND THERMAL DRYING OF SLUDGE Sludge dewatering Thermal drying od sludge UNIT 8. DOSAGE OF REAGENTS AND DEODORIZATION FACILITIES Dosage of reagents Deodorization facilities UNIT 9. INSTRUMENTATION Main processes to control in water treatment stations Instrumentation in water treatment plants