Search results for "Microfiltration"
showing 3 items of 13 documents
Management of tannery wastewaters: treatment of spent chrome tanning bath and vegetable tanning effluents
2013
Abstract In this work, a chain of treatment processes was proposed and described in order to reach better management of mineral and vegetable tannery wastewaters. First, chromium was precipitated from the spent chrome tanning bath by sodium hydroxide (NaOH) and then reformulated to form a complex of basic chromium sulfate which was tested successfully in mineral tanning process. On the other hand, the supernatant recovered after precipitation of chromium with NaOH was used to dilute vegetable tanning wastewaters characterized by a high concentration of polyphenols (about 2,574 mg/L). Diluted effluent was then treated by liming and tangential microfiltration using a ceramic membrane based on…
Degradation of Lincomycin in aqueous medium: coupling of solar photocatalysis and membrane separation
2005
Abstract The photocatalytic oxidation of a common antibiotic, the lincomycin was carried out in aqueous suspensions of polycrystalline TiO 2 Degussa P25 irradiated by sunlight. In order to improve the performance of the lincomycin degradation a hybrid system consisting of a solar photoreactor with the photocatalyst in suspension coupled with a membrane module, used to confine both photocatalyst and pollutants in the reaction environment, was tested. A preliminary study was carried out in order to determine some kinetics parameters of the drug photodegradation. The influence of initial substrate concentration on the lincomycin photooxidation rate was investigated. The photooxidation rate fol…
Preparation of Highly Clarified Anthocyanin-Enriched Purple Sweet Potato Juices by Membrane Filtration and Optimization of Their Sensorial Properties
2016
The aim of this work was to prepare clarified anthocyanin-enriched juices from purple sweet potatoes (PSP) and to evaluate their sensorial properties, with promising prospect for antioxidant molecules. Four PSP juice samples were prepared and annotated as (1) crude PSP extract, (2) PSP extract followed by microfiltration, (3) by ultrafiltration and (4) by nanofiltration (4). Although anthocyanins retention was observed during the filtration process, PSP microfiltrated juices generated better permeate with compromising between appearance transparency and anthocyanin content. Juice sensory properties (color, flavor, mouthfeel and clarity) were optimized by an L9(34) orthogonal design using PS…