background: chromium (cr) is the most important element used to plate other metals and electroplating factories are still consid­ered to be the most important industries which pollute the environment to this metal. this paper describes a study con­ducted to determine the efficiency of reverse-osmosis (ro) as a membrane technique for removal of cr from wastewater sam­ples synthetically prepared ...

background: desalination plants have an important role in providing community drinking water. the increasing trend of water consumption and decrease of natural resources of fresh water make this role even more important. the aim of this study was to evaluate the quality of inlet and outlet water of desalination plants by reverse osmosis (ro) process in qeshm, iran and also to compare the qualit...

background: reverse osmosis (ro) is an increasingly common method of desalination. a full scale water desalination system by membrane technology (ro) evaluated in a southern city (jask) in iran. methods: first, data collection on water supply and network were performed. analysis on most of the water quality parameters (turbidity, ph, ec, cl-, na+, alkalinity, ca, na, k, no3, no2, fe, mg, mn, nh...

Membrane processes have been successfully employed for treatment of a large number of industrial effluents. Reverse osmosis (RO) and ultrafiltration (UF) are versatile separation and purification tools for the process industries. Both of these techniques are based on the ability of pressure-driven filtration membranes to separate multi-component fluids based on molecular size, shape, and chemic...

Abstract Efficient desalination through a reverse osmosis (RO) membrane requires the prior removal of blockade-causing substances from raw seawater. To achieve ultrahigh-speed processing pretreatment process for seawater RO desalination, we combine traditional softening with ballasted flocculation (SBF) Ca 2+ and Mg removal. An alkaline mixture Ca(OH) 2 Na CO 3 was most suitable agent reduced a...

Abstract In reverse osmosis seawater treatment process, membrane fouling can be mitigated by degrading organic pollutants present in the feed seawater. The study evaluates effectiveness of employing solar photocatalysis using TiO 2 /ZnO/H O to pretreat (RO) under irradiation. Process optimisation and performance evaluation were undertaken response surface methodology-desirability function RSM i...

Seawater as abundant source for clean water is deemed impossible task, particularly in developing country. Therefore, the feasibility of applying reverse osmosis technology, coastal area drinking need further investigation. This paper aims to design and analyze performance small-scale desalination plant using combination multi tray aerator, media filter, multiple membranes consisting ultrafiltr...