سیدعبداللطیف هاشمی فرد

In this investigation, four type of ceramic microfiltration membranes; Mullite, Mullite alumina, Mullite alumina zeolite and mullite zeolite were fabriceated by using extrusion method. Scanning Electron microscopy (SEM), X-ry diffraction (XRD), porosimetery and mean pore size analysis were carried out in order to characterize fabricated membranes. These fabricated membranes were used in oily wastewater treatment by four process. Microfiltration (MF), MF-in line adsorption, MF-in line coagulation hybrid process and saline oily wastewater treatment. In microfiltration, effect of alumina and natural zeolite content in membrane structure on permeation flux and total organic carbon (TOC) rejection were investigated. In microfiltration-adsorption hybrid process, oily wastewater treated with Powdered Activated Carbon (PAC), natural zeolite as adsorption agents. In MF-in line coagulation, four type of coagulation agents (aluminum sulfate, ferric chloride, ferric sulfate and ferrous sulfate) were used for oily wastewater treatment. Effect of coagulation and adsorption agent’s concentration on membrane permeation flux and TOC rejection were studied. Finally in saline oily wastewater treatment, effect of salt concentration on ceramic membranes performance in terms of membrane permeation flux and TOC rejection were investigated. Hermia’s model for cross flow microfiltration was used for prediction membrane permeation flux in all tests and average errors between experimental flux decline data and modeled ones were reported. Results in microfiltration showed that, Mullite, Mullite alumina 50% (50 wt% alumina and 50 wt% kaolin), mullite alumina zeolite 20% (50 wt% kaolin clay, 20 wt% zeolite and 30 wt% alumina) and mullite zeolite 20% (80 wt% kaolin clay and 20 wt% natural zeolite) was the best performances in terms of permeation flux and TOC rejection. In MF-in line adsorption and MF-inline coagulation hybrid processes, by addition of adsorption and coagulation agents with any co