Elaboration of inorganic microfiltration membranes with hydroxyapatite applied to the treatment of wastewater from sea product industry
This work describes the elaboration of a new ceramic asymmetric microfiltration membranes (active layers) based on synthesized lacunary hydroxyapatite (HA). The support, with tubular configuration, was prepared from cordierite. It has a highly uniform porous structure with large pores (7 μm). Rheolo...
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Published in | Journal of membrane science Vol. 247; no. 1; pp. 1 - 9 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
01.02.2005
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | This work describes the elaboration of a new ceramic asymmetric microfiltration membranes (active layers) based on synthesized lacunary hydroxyapatite (HA). The support, with tubular configuration, was prepared from cordierite. It has a highly uniform porous structure with large pores (7
μm).
Rheology of HA slips, fixed the percentage of PVA addition, was studied in order to prepare a well-dispersed suspension suitable for slip casting process used to coat the active layer. After drying at room temperature for 24
h, the membrane was sintered at 600
°C. The characteristics of obtained membranes were: membrane thickness of about 32.5
μm; mean pores diameter of 0.5
μm and porosity of 48%.
The obtained membrane was used to treat cuttlefish effluents generated from the conditioning seawater products industry. These industries consume a great amount of water. In Sfax (Tunisia), about 1000
m
3/day are discharged in the littoral. Cross-flow microfiltration was carried out then, in order to reduce the turbidity and chemical oxygen demand (COD). The result showed a filtration flux of 125
l/h
m
2 and a high retention of turbidity (99%), colour and COD (92%). |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1 |
ISSN: | 0376-7388 1873-3123 |
DOI: | 10.1016/j.memsci.2004.03.047 |