Modelling

In the context of gold extraction, leaching is the dissolution of the metal or even a mineral in a liquid phase. Thus, it is of a primary concern the dissolution of gold in an aqueous solution, operation which requires both a complexant and an oxidant to achieve acceptable leaching rates and yields.

In spite of poor efficiency of the photovoltaic systems developed up to date and the high cost of the installations of the equipment of this kind of station of solar energy conversion into electric power, this did not stop the researchers to continue to make efforts in this field in order to minimiz

Electric energy consumption in the arid Saharan regions is continuingly increasing due to increasing urbanization. Photovoltaic solar energy may be a suitable form of alternative electric energy production due to the abundance of solar energy in this region. In this paper we are presenting the gener

A semi-empirical crossflow ultrafiltration (UF) model that can predict permeate flux as a function of time for different operating conditions was considered. Model predictions were analysed and compared with the experimental results obtained in a crossflow UF plant under different operating conditio

Red wine contains many compounds which have a beneficial effect on human health. The aims of this study were to concentrate the valuable components of wine by nanofiltration, to describe the mathematical model of the permeate flux and to estimate the cost of the process. Laboratory-size equipment wi

The model discussed in a previous work for the simulation of a deaerator to remove the oxygen from seawater in desalination plants has been improved. The conservative character of that model has been revised on the basis of the experimental industrial experience of FISIA Italimpianti S.p.A. In parti

In this work a non-steady state model for cross flow ultrafiltration was tested and the results estimated by the model were compared with those experimentally obtained. Crossflow ultrafiltration experiments were performed in a pilot plant using tubular ZrO2-TiO2 ceramic membranes with a MWCO of 15 k

Numerical and experimental analyses were performed for a modified air gap distillation membrane that combines the low conductive heat loss of an air gap membrane for distillation with the reduced mass transfer resistance of a direct contact membrane. Instead of a stagnant film of air separating the

A theoretical investigation of particle deposition onto a permeable surface of a tubular membrane is presented. The mass transport mechanisms are mathematically expressed using the two-dimensional convective diffusion equation. A numerical scheme is presented to solve the two-dimensional convective

This paper presents the characteristics of a solar desalination system based on the humidification–dehumidification principle. The system which, can be used in an open or closed cycle for air, is a modular one. It has the following independent components: two solar collectors, an evaporator and a co