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Water network partitioning (WNP) concerns the implementation of the paradigm of ‘divide and conquer’ in the water supply systems consisting in dividing a water network into k smaller subsystems by gate valves and flow meters. WNP allows improving the management of water distribution systems by transforming into Smart WAter Networks (SWANs) that represent key subsystems of Smart Cities. WNP is possible if water utilities start to use isolating valves (also with control devices) and flow meters. These instruments open new perspectives for the management of water supply systems both in terms of water saving and water protection. Recently, starting from the advantages offered by computing power and network analysis tools, some techniques based on graph partitioning algorithms have been developed by the authors to improve water management and protection, implementing the paradigm of ‘divide and conquer’. This paper presents the second release of SWANP 2.0 (Smart WAter Network Partitioning and Protection) software that integrates two different algorithms, based on multilevel and multi-agent techniques, for WNP and a novel algorithm, based on a multi-objective function, for water network protection from intentional contamination. The SWANP 2.0 software, developed in Python v2.7.6 language, provides the decision-maker different solutions comparing network layouts with some hydraulic and protection performance indices.

"This paper presents a theoretical study of cavitation as an advanced oxidation process. A. mathematical algorithm, which couples single bubble dynamics and chemical reactions for a. cavitating bubble, is proposed and compared with experimental and theoretical works. reported in the literature. The main output variable, used for comparison, is the hydroxyl. radical production. A wide range of parameter values is evaluated for the analysis of hydro-. dynamic cavitation in an orifice. Thanks to the large number of simulation, it was possible to. find a very good agreement with a design correlation proposed in the literature. Addition-. ally, a novel approach has been proposed, which consists of integrating the estimated radical. production over a typical bubble size distribution in order to predict a global oxidant pro-. duction. Moreover, by fixing the values of flowrate, pressure, and geometric parameters, a. real experimental condition of hydrodynamic cavitation in a Venturi device has been simu-. lated. This allowed the comparison of simulation results with the experimental ones reported. in the literature. A good agreement has been found in terms of cavitational yield, an estima-. tion of the process efficiency from an energetic perspective."

The adsorption of mercuric chloride vapours on a fixed bed of calcium hydroxide fine particles has been experimentally studied. The study has been conducted at laboratory scale using simulated flue gases, constituted of mercuric chloride vapours in nitrogen, which have been in contact with a Ca(OH)2 fixed bed. The effect of the bed temperature, the inlet HgCl2 concentration, and the relative gas-solid velocity on the HgCl2 removal efficiency has been studied. The experimental results indicated that high removal efficiencies of up to 95% can be obtained. The bed temperature has been found to be the most relevant parameter; particularly as the experimental results show that the lower the bed temperature, the higher the removal efficiency. Moreover, the removal efficiency increases when the HgCl2 concentration in the inlet gas increases and when the relative gas-solid velocity decreases. A model based on a simplified expression of the Freundlich adsorption isotherm has been proposed, which is able t...