Membrane

Membrane processes have been used as a key technology for water reclamation and reuse of secondary effluent discharged from municipal wastewater treatment plants. However, its extensive practices are limited due to membrane fouling. To control and manage the membrane fouling properly, pretreatment m

The physiochemical properties of 17 widely used commercial RO and NF polyamide (PA) membranes were fully characterized by atomic force microscopy, transmission electron microscopy, contact angle measurement, streaming potential analysis, and flux and rejection performance tests. The surface properti

The physiochemical properties of reserve osmosis (RO) and nanofiltration (NF) polyamide (PA) membranes are largely determined by their PA chemistry and coatings, if any. Knowledge on such inherent relationship is critically needed in advancing membrane technology. This paper presents a consistent an

Empirically derived parameters and analytical solutions were used to determine possible mechanistic processes of organo-macromolecular fate in dead-end hyperfiltration at abnormal hydraulic pressure settings. Ideally the concentration polarization is assumed to have an ideal geometry but this may no

Scaling and fouling of membranes are an on-going performance issue for most plants This presentation outlines innovations in speciality chemicals designed to inhibit membrane scaling and fouling and to clean membranes where deposition has occurred. There is an increasing trend to treat recycled wast

Suspended particles and dissolved solids in seawater during desalination process have been known to cause colloidal fouling in membranes. The membrane filtration-differential mobility analyzer (MF-DMA) counting technique has been developed to quantify suspended nanoparticles and dissolved solids in

Membrane separation technologies applied to protein purification is an interesting development that has seen growth in recent years. However, studies about the long-term effects of the cleaning stage, considering different chemical agents and operating conditions, on the performance of the membranes

Zeolite MFI crystal layers were grown on different α-alumina supports. Permeation and separation characteristics of selected zeolite MFI composite membranes were measured for the system of butane isomers. Flux, permeation and separation factors were measured as a function of feed pressure, temperatu

Membrane reactors could serve as a tool for enzyme-catalyzed reactions and they enable the performance of catalytic reaction, enzyme recovery and product isolation as a one-step process. In the presented work, the use of continuous flat-shape and continuous tubular membrane enzymatic reactors for di

This study is focused on the application of the ion exchange Á submerged microfiltration hybrid process for boron removal from geothermal water containing high level of boron (8 Á 9 mg B/L). The goal of this study is to determine the optimum parameters such as feed flow rate, resin concentration and