Search results for "sanita"
showing 10 items of 855 documents
The effect of hydrocarbon on a pilot plant membrane bioreactor system
2015
The paper reports the main results from an experimental gathering campaign carried out on a bench scale plant for the evaluation of hydrocarbon effect on the system performance. In particular, a membrane bioreactor (MBR) under submerged configuration was analysed. The MBR plant was fed with synthetic wastewater containing hydrocarbons. Organic carbon, hydrocarbons and ammonium removal, kinetic constants, extracellular polymeric substances (EPSs) production and membranes fouling rates have been assessed. The observed results highlighted good system performance in terms of both COD removal and nitrification, thus showing a sort of biomass adaptation to hydrocarbon. Such a result has been also…
A new integrated MBR model for wastewater treatment: sensitivity and uncertainty analysis
2017
In this study a new integrated membrane bioreactor (MBR) model is proposed. The model is able to describe the main biological processes aimed at the carbon and the nutrients (nitrogen, N and phosphorus, P) removal coupled with the soluble microbial products (SMP) formation/degradation. Furthermore, the model describes the key physical processes and the interconnection between SMP and membrane fouling. The model was calibrated by adopting data measured during the monitoring of a University Cape Town (UCT) MBR pilot plant. A sensitivity analysis allowed the reduction of the number of model FACTORs to be calibrated from 122 to 45. A good correlation between measured and simulated data was obta…
“Modellazione dell’impatto dei deflussi urbani sui corpi idrici ricettori attraverso un approccio integrato”. La tutela idraulica ed ambientale dei t…
2005
II ADVANCED COURSE Innovative wastewater treatment and mathematical modeling
2017
Over the past years, the knowledge and understanding of biological wastewater treatment has advanced extensively and moved away from empirically-based approaches to a fundamentally-based 'first principles' approach that embrace: bio-chemistry, microbiology, mathematics, and physical, chemical and bioprocess engineering. Also, the wastewater treatment plant of the future will be a water resource recovery facility (WRRF), implying attention for quite different aspects of these large scale technologies. Many of these advances have matured to a degree that they have been codified into mathematical models able to describe and simulate diverse systems under different environmental conditions at e…
Mathematical modelling of biogas from municipal solid waste landfil
2016
Sanitary landfills for municipal solid wastes can be considered as large biological reactors where the organic fraction of municipal solid waste undergoes anaerobic digestion producing gas and liquid emissions. Leachate production from municipal sanitary landfills is currently recognized as a major environmental burden associated with municipal solid waste management and it may be responsible for local pollution of groundwater and soil. Moreover, the fate of the organic compounds within the landfill body is of primary importance since it directly influences the production of landfill gas. The aim of the paper is to propose an integrated mathematical model able to simulate, on one hand, the …
Uncertainty of a biological nitrogen and phosphorus removal model
2010
In the last few years, the use of mathematical models in wastewater treatment plant (WWTP) processes has become a common way to predict WWTP behaviour. However, mathematical models generally demand advanced input for their implementation that must be evaluated by an extensive data gathering campaign, which cannot always be carried out. This fact, together with the intrinsic complexity of the model structure, leads to model results that may be very uncertain. Quantification of the uncertainty is imperative. However, despite the importance of uncertainty quantification, only a few studies have been carried out in the wastewater treatment field, and those studies only included a few of the sou…
LA MODELLAZIONE DEI CORSI D’ACQUA A CARATTERE TORRENTIZIO: IL CASO DI STUDIO DEL FIUME ORETO
2011
I modelli di qualità fluviale possono essere dei validi strumenti per la valutazione e la gestione della qualità dei corpi idrici ricettori. Tuttavia tali modelli richiedono una calibrazione accurata al fine di valutare i parametri che in essi compaiono; ciò richiede una vasta banca dati di qualità, raramente disponibile nel caso di piccoli corsi d’acqua fluviali a carattere torrentizio, per il limitato interesse spesso prestato a tali tipologie di corpi idrici. Nella memoria viene presentato un modello semplificato di qualità fluviale; il modello trae spunto dal classico modello di Streeter e Phelps, integrato al fine di tener conto dei principali processi fisici, chimici e biologici per l…
Un modello di simulazione per la previsione del rischio ambientale di una discarica controllata
2016
La memoria presenta un modello matematico di simulazione messo a punto per la previsione del plume di contaminazione in falda originato da perdite attraverso l’impermeabilizzazione di fondo di una discarica controllata. Il modello è composto da: i) un sottomodello “discarica”, nel quale vengono valutate le caratteristiche quali-quantitative di produzione del percolato e delle perdite attraverso il sistema di impermeabilizzazione di fondo della discarica; ii) un sottomodello di “destino e trasporto” degli inquinanti nei terreni insaturo e saturo, in cui sono simulate le variazioni quali-quantitative del percolato infiltrato; iii) un sottomodello di valutazione del rischio sanitario nei confr…
Parameter estimation and sensitivity analysis of a nitrogen and phosphorus biological removal model
2009
Notes about urban drainage systems in the ancient Rome
2012
The magnificence of Roman buildings is very well-known from historical books, notes etc.. In contraposition to this, generally speaking, less is known about the majesty of Roman sewer systems in terms of structures, facilities and the very advanced as well as rudimental complexity. The Roman sewers have been over-praised. Indeed, despite their longevity, they ignored basic sanitary principles as well as design rules. The Roman Empire is in many ways the highest point of sewage management in the ancient world. Famous for public baths and latrines with quite complex engineering, Rome also excelled in the use of covered drains for stormwater and waste-sewage, with some houses directly connecte…