| Permeability Behavior and Wastewater Filtration Performance
of Mullite Bonded Porous SiC Ceramic Membrane Prepared
Using Coal Fly Ash as Sintering Additive |
Dulal Das,a Nijhuma Kayala,* and Murilo Daniel de Mello Innocentini
Pages : 186-192
DOI : 10.1080/0371750X.2021.1934122 |
| Abstract |
| With SiC as starting powder, waste fly ash as sintering additive and metal oxide as
catalyst, mullite bonded SiC ceramic membrane was prepared at 1000oC using the
conventional solid-state reaction method. Permeability parameters in both air and
water flow tests were obtained using laboratory made set-up and the pure water
permeability was measured at variable transmembrane pressures. The membrane
exhibited excellent pure water flux of 5261 L.m–2.h–1.bar–1 with open porosity of 44.7%
and mean pore size of 3.7 m. With this membrane a high oil removal efficiency of
91% was achieved from the kitchen wastewater having initial oil concentration of
1657 mg.L–1. The method developed here is technologically benign and addressed
prevention of environmental pollution by utilizing hazardous waste material for
fabrication of porous SiC ceramic membrane at a reduced cost with good mechanical,
permeability characteristics and wastewater filtration efficiency. Hence, the proposed
method for SiC membranes has good sustainability and is scalable for oily wastewater
treatment.
[Keywords: Microfiltration membrane, Microstructure, Air permeability, Wastewater
treatment] |
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