Università Roma Tre

introduction Overlook on water pollution issues
point source vs diffuse pollution
examples and case studies of water pollution
parameters and life relevant element cycles physical parameters
physical parameters (total solids classification)
chemical parameters
dissolved oxyhen, nitrogen, phosphorus
eutrophycation
variables, models, reactions variables; quality model employment
reactions; temperature effect
temperature effects; stechiometry
Continuously Stirred Tank Reactors (CSTR) or fully mixed reactors mass balance of a CSTR (with sedimentation)
residence time and transfer function
steady state solution
CSTR, with no loading. Half-life time
CSTR: analytical solutions: dirac function
CSTR: analytical solutions: step function, linear function, exponential loading. Linearity and effects superposition
Feedforward systems of reactors; two layer stratified lakes; dispersion coefficient. Feedback systems of reactors
CSTR exercise (1-2)
CSTR exercise (3-4)
Water quality models and management Model structures. Applied hydology techinques: design hyetograph, infiltration.
dry weather and rainfall water quality. Water quality. First foul flash. Build-up and wash-off.
Water quality management: combined use of sewer overflows and sedimentation tanks. Design criteria.
Multi-purpose reservoirs. Best Management Practises
Storm Water Management Model
Storm Water Management Model
exercise: first flush tank for sedimentation
Water quality in rivers PFR (Plug Flow Reactors) models. Stationary conditions. Comparison with CSTR models.
MFR (Mixed Flow Reactors) models. Stationary advection/dispersion equations. Peclet number. Limit cases (no advection, no dispersion, no decay)
Non stationary PFR/MFR models. Random walk and Gaussian inverse functiom.
Organic matter degradation without reaeration. BOD ultimate and BOD5.
Reaeration: physical process and empirical equations. Organic matter degradation with reaeration.
Streeter-Phelps equations and analysis. Anoxic conditions
Application of Streeter-Phelps equations. Multiple point sources.
Nitrogen and Total Phosphorus: models for concentration assesment

BOOKS
Chapra, S. - Surface Water quality modelling. McGraw Hill
Thomann, R. ; Mueller, J. - Principles of surface Water quality Modeling and Control. Harper Collins Publishers
Novotny, V.; Olem, H. ; Water Quality: Prevention, Identification, and Management of Diffuse Pollution. John Wiley and Sons
Centro Studi Deflussi Urbani - AAVV - Sistemi di fognatura - Manuale di progettazione