Harvesting of microalgae via submerged membranes: Flux, fouling and its reversibility
Küçük Resim Yok
Tarih
2017
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Techno Press
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The purpose of this study was to investigate membrane fouling caused by microalgal cells in submerged membrane systems consisting of polymeric and ceramic microfiltration membranes. In this study, one polymeric (flat-sheet, pore size: 0.2 ?m) and two ceramic (flat-sheet, pore size: 0.2 ?m and cylindrical, pore size: 1 ?m) membranes were used. Physical cleaning was performed with water and air to determine the potential for reversible and irreversible membrane fouling. The study results showed that substantial irreversible membrane fouling (after four filtration cycles, irreversible fouling degree 27% (cleaning with water) and 38% (cleaning with air)) occurs in the polymeric membrane. In cleaning studies performed using water and air on ceramic membranes, it was observed that compressed air was more effective (recovery rate: 87-91%) for membrane cleaning. The harvesting performance of the membranes was examined through critical flux experiments. The critical flux values for polymeric membrane with a pore size of 0.20 ?m and ceramic membranes with a pore size of 0.20 ?m and 1 ?m were ? 95 L/m2hour, ? 70 L/m2hour and ? 55 L/m2hour, respectively. It was determined that critical flux varies depending on the membrane material and the pore size. To obtain more information on membrane fouling caused by microalgal cells, the characterization of the fouled polymeric membrane was performed. This study concluded that ceramic membranes with a pore size of 0.2-1 ?m in the submerged membrane system could be efficiently used for microalgae harvesting by cleaning the membrane with compressed air at regular intervals. © 2017 Techno-Press, Ltd.
Açıklama
Anahtar Kelimeler
Critical flux, Fouling, Membrane, Microalgae, Reversibility, Air cleaners, Algae, Ceramic materials, Ceramic membranes, Cleaning, Compressed air, Filtration, Fouling, Membrane fouling, Microfiltration, Microorganisms, Polymeric membranes, Polymers, Pore size, Pressure vessels, Water filtration, Ceramic micro-filtration membranes, Critical flux, Irreversible fouling, Micro-algae, Microalgae harvesting, Physical cleanings, Reversibility, Submerged membrane, Membranes, Critical flux, Fouling, Membrane, Microalgae, Reversibility, Air cleaners, Algae, Ceramic materials, Ceramic membranes, Cleaning, Compressed air, Filtration, Fouling, Membrane fouling, Microfiltration, Microorganisms, Polymeric membranes, Polymers, Pore size, Pressure vessels, Water filtration, Ceramic micro-filtration membranes, Critical flux, Irreversible fouling, Micro-algae, Microalgae harvesting, Physical cleanings, Reversibility, Submerged membrane, Membranes
Kaynak
Membrane Water Treatment
WoS Q Değeri
Q3
Scopus Q Değeri
Q3
Cilt
8
Sayı
5
