A Novel and Rapid Harvesting Method of Microalgae Using Saw Dust Coated Polypyrrole
سال انتشار: 1394
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 334
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شناسه ملی سند علمی:
JR_IJEE-7-2_015
تاریخ نمایه سازی: 15 شهریور 1395
چکیده مقاله:
In this study a simple and rapid harvesting method using electro conductive polymer coated saw dust has been presented as a new coagulant for separating Chlorella vulgaris from a diluted suspension. Polypyrrole (PPy) coated saw dust as a novel coagulant was prepared via in-situ polymerization of pyrrole (Py) monomer using FeCl3 oxidant in aqueous medium in which saw dust particles were suspended. The zeta potential of coagulant and C. vulgaris and X-ray photoelectron spectroscopic (XPS) analysis of coagulant were characterized. PPy maintain predominantly positive charge over a wide pH range (2-10) with an isoelectric point 10.4 while, C. vulgaris maintained negative surface charge from pH 5 and onward with isoelectric point 3.8. The microalgae showed the highest separation efficiency at pH 10. The maximal recovery efficiency reached more than 90% for microalgae at a stirring speed of 120 rpm within 7 min. The maximal adsorption capacity of C. vulgaris was 28.8 mg dry biomass/mg-saw dust coated PPy. The concentration factor obtained is higher than 32 which save energy and time associated with microalgal harvesting and allows a reduction in the equipment size necessary for biomass dewatering and improves the feasibility of using these microorganisms in biofuel or wastewater processes.
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نویسندگان
Sufia Hena
School of Industrial Technology, University Sains Malaysia, George Town, Penang, ۱۱۸۰۰, Malaysia
Nur Fathah
School of Industrial Technology, University Sains Malaysia, George Town, Penang, ۱۱۸۰۰, Malaysia
Huda Awang
School of Industrial Technology, University Sains Malaysia, George Town, Penang, ۱۱۸۰۰, Malaysia