| Rice Husks and Kaolin Based Ceramic Membrane for
Filtration of Slaughterhouse Wastewater: Optimization
Study Using Response Surface Methodology (RSM) and
Responses Interdependence Analysis |
Saliou Njuhou,a
Mohamed Mouafon,a
Amadou Pountouenchi,a
Oumarou Ramadan Njindam,a
Gisèle Laure Lecomte-Nanab
and Dayirou Njoyaa, *
Pages : 143-155
DOI : |
| Abstract |
| The optimization of properties of ceramic membrane by taking into account the
correlation between their properties remains a challenge. The purpose of this study
was to achieve this objective by using design of experiment to perform optimization of
a ceramic membrane made from clays and rice husk. Two kaolinite clays, namely MY3
and KG, were used with rice husk to manufacture ceramic membranes. After sintering,
the obtained products underwent characterizations such as flexural strength, open
porosity, permeability, hydraulic diameter, XRD analysis and microscopy image analysis.
The effects of each component on membrane properties were modelled with linear
models. The results showed significant interactions between constituents and between
membrane properties (porosity with resistance, permeability with porosity and hydraulic
diameter). The optimal mixture consisted of 83% MY3, 15% KG and 2% rice husk which
presented 8.0 MPa flexural strength, 30% porosity, 675 L.h–1.m–2.bar–1 permeability and
2.6 ?m hydraulic diameter. Filtration of slaughterhouse wastewater showed a reduction
of 97% chemical oxygen demand, 99% turbidity, 80% total dissolved solid, electrical
conductivity and salinity. 84% pseudomonas and 75% vibrio cholerae were also eliminated.
[Keywords: Kaolinite clay, Design of experiment, Simplex-centroid design, Ceramic
membrane, Bacterial retention] |
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