At the end of the course the student will have acquired knowledge of the main technologies for the treatment of wastewater, for the treatment of drinking water, for the treatment/disposal/recovery of solid urban waste; will also be able to carry out the general sizing of the plants.
Course Prerequisites
Knowledge of chemistry and Sanitary-Environmental engineering.
Teaching Methods
The course is organized into lectures and exercises (in the classroom and in the laboratory). The training activities are complemented by technical visits to wastewater treatment plants.
Assessment Methods
Method: written test followed by oral test. Type of evaluation used: grade. Number and types of tests: final test (written + oral). Access to the oral test is permitted upon passing the written test (with at least 18/30).
Texts
• Slides. • Collivignarelli Carlo, Bertanza Giorgio. Sanitary-Environmental Engineering. Città Studi Editions. • Collivignarelli Carlo, Sorlini Sabrina. Water purification - Processes and technologies. Dario Flaccovio Editore.
Contents
WASTEWATER TREATMENTS Qualitative and quantitative characteristics of wastewater. Pretreatment of municipal sewage (sizing). Primary sedimentation (sizing methods, performance yields). Conventional biological processes with activated sludge (hydrodynamic models, management issues, sizing). Tertiary treatments for nitrogen and phosphorus removal (system layouts, fields of application, sizing). Secondary sedimentation (sedimentation methods, sizing criteria). Disinfection processes (selection and sizing criteria). Sludge treatment technologies (mass balances). Start-up and operation of a conventional wastewater treatment plant. Development of monitoring protocols and management data processing criteria. SUPPLY WATER TREATMENTS General considerations on water intended for human consumption. Conventional treatments for water purification. Identification of system layouts based on the supply source. Preliminary sizing of water treatment plants. SOLID WASTE TREATMENTS. Collection techniques. Waste-to-energy plants (furnace types, fields of application, furnace sizing phase). Controlled landfills (classification of management issues during the post-closure and sizing phases). LABORATORY ACTIVITIES: Wastewater: Laboratory: measurements of biochemical and physical parameters, SVI tests, respirometric OUR tests, foaming tests, ... Drinking water: Laboratory: jar tests, calculation of Freundlich isotherms, ... TECHNICAL VISIT to a wastewater treatment plant.
