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Effect of different flocculants on the flocculation performance of microalgae, Chaetoceros calcitrans, cells

The possibility of using flocculation technique for the separation of microalgae, Chaetoceros calcitrans, biomass from the culture broth was investigated. The flocculation experiments were conducted in 500 mL beaker using culture broth obtained from 10 L photobioreactor. The harvesting efficiency of...

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Main Authors: Tuan Harith, Zuharlida, Md. Yusoff, Fatimah, Mohamed, Mohd Shamzi, Mohamed Din, Mohamed Shariff, Ariff, Arbakariya
Format: Article
Language:English
Published: Academic Journals 2009
Online Access:http://psasir.upm.edu.my/id/eprint/14226/1/14226.pdf
http://psasir.upm.edu.my/id/eprint/14226/
http://www.academicjournals.org/journal/AJB/article-abstract/687D9389547
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spelling my.upm.eprints.142262016-05-03T11:23:26Z http://psasir.upm.edu.my/id/eprint/14226/ Effect of different flocculants on the flocculation performance of microalgae, Chaetoceros calcitrans, cells Tuan Harith, Zuharlida Md. Yusoff, Fatimah Mohamed, Mohd Shamzi Mohamed Din, Mohamed Shariff Ariff, Arbakariya The possibility of using flocculation technique for the separation of microalgae, Chaetoceros calcitrans, biomass from the culture broth was investigated. The flocculation experiments were conducted in 500 mL beaker using culture broth obtained from 10 L photobioreactor. The harvesting efficiency of 90 and 60% was obtained in flocculation without flocculants conducted for 10 days at 27ºC (in light and dark) and 4ºC (dark), respectively. Harvesting efficiency higher than 90% with short settling time was achieved by adjusting the culture pH to 10.2 using either sodium hydroxide (NaOH) or potassium hydroxide (KOH). Improved cell viability (> 80%) and settling time with a slight improvement of flocculation efficiency was achieved by the addition of polyelectrolytes flocculant (Magnafloc® LT 27 and LT 25). However, the flocculants were only functioned when the pH of the microalgae culture was pre-adjusted to a certain value that promotes cells entrapment and surface charge neutralization prior to flocculation process. The flocculation efficiency and cell viability obtained in flocculation with Magnafloc® (LT 25 and LT 27) was comparable to that obtained in flocculation with chitosan. When chitosan and Magnafloc® (LT 25 and LT 27) were used as flocculants, the highest flocculation efficiency of C. calcitrans cells was observed at pH 8 and 10.2, respectively. Substantial increased in sedimentation rate was observed with increasing flocculants dosage though the flocculation efficiency and cell viability were not significantly varied. Academic Journals 2009 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/14226/1/14226.pdf Tuan Harith, Zuharlida and Md. Yusoff, Fatimah and Mohamed, Mohd Shamzi and Mohamed Din, Mohamed Shariff and Ariff, Arbakariya (2009) Effect of different flocculants on the flocculation performance of microalgae, Chaetoceros calcitrans, cells. African Journal of Biotechnology, 8 (21). art. no. 687D9389547. pp. 5971-5978. ISSN 1684–5315 http://www.academicjournals.org/journal/AJB/article-abstract/687D9389547
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description The possibility of using flocculation technique for the separation of microalgae, Chaetoceros calcitrans, biomass from the culture broth was investigated. The flocculation experiments were conducted in 500 mL beaker using culture broth obtained from 10 L photobioreactor. The harvesting efficiency of 90 and 60% was obtained in flocculation without flocculants conducted for 10 days at 27ºC (in light and dark) and 4ºC (dark), respectively. Harvesting efficiency higher than 90% with short settling time was achieved by adjusting the culture pH to 10.2 using either sodium hydroxide (NaOH) or potassium hydroxide (KOH). Improved cell viability (> 80%) and settling time with a slight improvement of flocculation efficiency was achieved by the addition of polyelectrolytes flocculant (Magnafloc® LT 27 and LT 25). However, the flocculants were only functioned when the pH of the microalgae culture was pre-adjusted to a certain value that promotes cells entrapment and surface charge neutralization prior to flocculation process. The flocculation efficiency and cell viability obtained in flocculation with Magnafloc® (LT 25 and LT 27) was comparable to that obtained in flocculation with chitosan. When chitosan and Magnafloc® (LT 25 and LT 27) were used as flocculants, the highest flocculation efficiency of C. calcitrans cells was observed at pH 8 and 10.2, respectively. Substantial increased in sedimentation rate was observed with increasing flocculants dosage though the flocculation efficiency and cell viability were not significantly varied.
format Article
author Tuan Harith, Zuharlida
Md. Yusoff, Fatimah
Mohamed, Mohd Shamzi
Mohamed Din, Mohamed Shariff
Ariff, Arbakariya
spellingShingle Tuan Harith, Zuharlida
Md. Yusoff, Fatimah
Mohamed, Mohd Shamzi
Mohamed Din, Mohamed Shariff
Ariff, Arbakariya
Effect of different flocculants on the flocculation performance of microalgae, Chaetoceros calcitrans, cells
author_facet Tuan Harith, Zuharlida
Md. Yusoff, Fatimah
Mohamed, Mohd Shamzi
Mohamed Din, Mohamed Shariff
Ariff, Arbakariya
author_sort Tuan Harith, Zuharlida
title Effect of different flocculants on the flocculation performance of microalgae, Chaetoceros calcitrans, cells
title_short Effect of different flocculants on the flocculation performance of microalgae, Chaetoceros calcitrans, cells
title_full Effect of different flocculants on the flocculation performance of microalgae, Chaetoceros calcitrans, cells
title_fullStr Effect of different flocculants on the flocculation performance of microalgae, Chaetoceros calcitrans, cells
title_full_unstemmed Effect of different flocculants on the flocculation performance of microalgae, Chaetoceros calcitrans, cells
title_sort effect of different flocculants on the flocculation performance of microalgae, chaetoceros calcitrans, cells
publisher Academic Journals
publishDate 2009
url http://psasir.upm.edu.my/id/eprint/14226/1/14226.pdf
http://psasir.upm.edu.my/id/eprint/14226/
http://www.academicjournals.org/journal/AJB/article-abstract/687D9389547
_version_ 1643825570223489024
score 13.211869

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