Please use this identifier to cite or link to this item: http://umt-ir.umt.edu.my:8080/handle/123456789/5657
Title: Optimization of biomass harvesting of microalgae, Chlorella sp. utilizing auto-flocculating microalgae, Ankistrodesmus sp. as bio-flocculant
Authors: Fathurrahman Lananan
Fareza Hanis Mohd Yunos
Nurfarahana Mohd Nasir
Nur Syuhada Abu Bakar
Su Shiung Lam
Ahmad Jusoh
Keywords: Microalgae
Harvesting
Auto-flocculating
Chlorella sp.
Ankistrodesmus sp.
Issue Date: 2016
Publisher: International Biodeterioration and Biodegradation
Citation: Vol.113; 391-396 p.
Abstract: Current microalgae harvesting technology depends on sophisticated and complex approaches such as hollow fiber filtration, chemical flocculants and centrifugation, which are deemed feasible if high value products were obtained. In this study the potential of auto-flocculating microalgae Ankistrodesmus sp. was examined for its potential as bio-flocculant to harvest Chlorella sp. Zeta Potential Analysis was performed on the microalgae in the pH range of 4.16e9.55 before subjecting the microalgae to the coagulation e flocculation assay. The isoelectric point of microalgae suspension was observed in the range of pH 5e8 and the magnitude of zeta potentials ranged between 10 mv to 35 mV. Ankistrodesmus sp. was inoculated at a dosage of 50% (v/v) into a batch of Chlorella sp. culture during the coagulation e flocculation assay. The removal efficiency shown by Ankistrodesmus sp. was 82% at pH 7.1 followed by 55% at pH 6.2. Utilizing Ankistrodesmus sp. for flocculation was efficient since it did not require any changes of pH because isoelectric point was observed within the normal pH of Chlorella sp. growth condition. Development of innovative microalgae treatment technology incorporating continuous bio-harvesting with microalgae-microalgae flocculation could provide a low-cost and sustainable wastewater treatment approach. In addition, the use of microalgae itself to harvest microalgae biomass harvesting could simplify downstream processing, saving resources and would reduce the production cost for future microalgae-based technology.
URI: http://hdl.handle.net/123456789/5657
ISSN: 9648305
Appears in Collections:Journal Articles



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