We report the complex dynamics of spiral waves observed in the ferroin-catalyzed BZ reaction. The reaction is run in an open unstirred reactor (CFUR) with the catalyst immobilized on a polysulfone membrane. The catalyst-loaded membrane is placed between two well stirred compartments which are fed with solutions of sulfuric acid/malonic acid/bromide and sulfuric acid/bromate, respectively. An el...

Abstract Feed spacers are the critical components of any spiral-wound filtration module, dictating performance. Three spacer designs, namely a non-woven commercial (varying filament cross-section), symmetric pillar spacer, and novel hole-pillar (constant diameter) were studied using Direct Numerical Simulations (DNS), 3-D printed subsequently experimentally tested in lab-scale ultrafiltration s...

A systematic selection of different transmembrane pressures (TMP) and levels diafiltration (DF) was studied to optimize these critical process parameters during the manufacturing micellar casein concentrate (MCC) using spiral-wound polymeric membrane filtration. Three TMPs (34.5, 62.1, 103.4 kPa) four DF (0, 70, 100, 150%) were applied in study. The effect TMP level on flux rates, serum protein...

Black liquor concentration using pressure driven membrane separation has long been proposed as a means of achieving energy savings and breaking production bottlenecks. To date, limitations in perfor-mance stability under black process conditions have prevented those promises from being realized outside tightly controlled laboratory settings. In this work, we describe the first successful pilot ...

The aim of this work is to design and integrate an optimized batch membrane process in a conventional purification process used for the treatment of tannery wastewater. The integration was performed by using two spiral wound membrane modules in series, that is, nanofiltration and reverse osmosis, as substitutes to the biological reactor. The membrane process was designed in terms of sensible fo...

Abstract Intense pressure on water resources has led to efforts reuse reclaimed processing wastewater in the food industry. There are tight rules for quality, but efficient separation technologies such as reverse osmosis possess good possibilities reuse. This study developed a membrane-based concept from candy industry emphasizing pre-treatment stage reduce fouling. The contained suspended soli...

Separation of amoxicillin from pharmaceutical wastewater by nanofiltration (NF) membrane has been investigated in this study. For this purpose a membrane system including a polyamide spiral wound NF membrane was evaluated for the treatment of amoxicillin wastewater. The effects of operating conditions such as flow rate, pressure and concentration of amoxicillin and COD in the feed, on the effic...

Reverse osmosis (RO) spiral wound membrane generation reached 93.5% in 2020, resulting 14,000 tons of used RO membranes being discarded annually into landfills, which is unprecedented. The current study aims to chemically convert the end-of-life membrane, followed by its performance evaluation and microbial removal efficiency on three different sources water, i.e., tap water (TW), integrated co...