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In-situ disinfection and a new downstream processing scheme from algal harvesting to lipid extraction using ozone-rich microbubbles for biofuel production

The scaling up and downstream processing costs of biofuels from microalgae are major concerns. This study focuses on reducing the cost by using energy efficient methods in the production of microalgae biomass and the downstream processes (biomass harvesting and lipid extraction). Ozonation of Dunali...

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Main Authors: Kamaroddin, M. F., Hanotu, J., Gilmour, D. J., Zimmerman, W. B.
Format: Article
Published: Elsevier 2016
Subjects:
TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/72379/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84969217996&doi=10.1016%2fj.algal.2016.05.006&partnerID=40&md5=8af5d113cc95944354bc6f221501f1bc
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spelling my.utm.723792017-11-20T08:23:44Z http://eprints.utm.my/id/eprint/72379/ In-situ disinfection and a new downstream processing scheme from algal harvesting to lipid extraction using ozone-rich microbubbles for biofuel production Kamaroddin, M. F. Hanotu, J. Gilmour, D. J. Zimmerman, W. B. TP Chemical technology The scaling up and downstream processing costs of biofuels from microalgae are major concerns. This study focuses on reducing the cost by using energy efficient methods in the production of microalgae biomass and the downstream processes (biomass harvesting and lipid extraction). Ozonation of Dunaliella salina (green alga) and Halomonas (Gram-negative bacterium) mixed cultures for 10 min at 8 mg/L resulted in a reduction in the bacterial contaminant without harming the microalga. Harvesting of D. salina cells through microflotation resulted in a 93.4% recovery efficiency. Ozonation of the harvested microalgal cells for 60 min produced three main saturated hydrocarbon compounds (2-pentadecanone, 6, 10, 14-trimethyl; hexadecanoic acid; octadecanoic acid) consisting of 16 to 18 carbons. By systematically switching the carrier gas from CO2 to O3, the microbubble-driven airlift loop bioreactor (ALB) delivers nutrient to the culture and in-situ disinfection respectively. Further, modulating the bubble size to match particle size ensures recovery of the cells after culture. All three key operations (disinfection, harvesting and lipid extraction) are assembled in a scalable, relatively energy efficient process. Elsevier 2016 Article PeerReviewed Kamaroddin, M. F. and Hanotu, J. and Gilmour, D. J. and Zimmerman, W. B. (2016) In-situ disinfection and a new downstream processing scheme from algal harvesting to lipid extraction using ozone-rich microbubbles for biofuel production. Algal Research, 17 . pp. 217-226. ISSN 2211-9264 https://www.scopus.com/inward/record.uri?eid=2-s2.0-84969217996&doi=10.1016%2fj.algal.2016.05.006&partnerID=40&md5=8af5d113cc95944354bc6f221501f1bc
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TP Chemical technology
spellingShingle TP Chemical technology
Kamaroddin, M. F.
Hanotu, J.
Gilmour, D. J.
Zimmerman, W. B.
In-situ disinfection and a new downstream processing scheme from algal harvesting to lipid extraction using ozone-rich microbubbles for biofuel production
description The scaling up and downstream processing costs of biofuels from microalgae are major concerns. This study focuses on reducing the cost by using energy efficient methods in the production of microalgae biomass and the downstream processes (biomass harvesting and lipid extraction). Ozonation of Dunaliella salina (green alga) and Halomonas (Gram-negative bacterium) mixed cultures for 10 min at 8 mg/L resulted in a reduction in the bacterial contaminant without harming the microalga. Harvesting of D. salina cells through microflotation resulted in a 93.4% recovery efficiency. Ozonation of the harvested microalgal cells for 60 min produced three main saturated hydrocarbon compounds (2-pentadecanone, 6, 10, 14-trimethyl; hexadecanoic acid; octadecanoic acid) consisting of 16 to 18 carbons. By systematically switching the carrier gas from CO2 to O3, the microbubble-driven airlift loop bioreactor (ALB) delivers nutrient to the culture and in-situ disinfection respectively. Further, modulating the bubble size to match particle size ensures recovery of the cells after culture. All three key operations (disinfection, harvesting and lipid extraction) are assembled in a scalable, relatively energy efficient process.
format Article
author Kamaroddin, M. F.
Hanotu, J.
Gilmour, D. J.
Zimmerman, W. B.
author_facet Kamaroddin, M. F.
Hanotu, J.
Gilmour, D. J.
Zimmerman, W. B.
author_sort Kamaroddin, M. F.
title In-situ disinfection and a new downstream processing scheme from algal harvesting to lipid extraction using ozone-rich microbubbles for biofuel production
title_short In-situ disinfection and a new downstream processing scheme from algal harvesting to lipid extraction using ozone-rich microbubbles for biofuel production
title_full In-situ disinfection and a new downstream processing scheme from algal harvesting to lipid extraction using ozone-rich microbubbles for biofuel production
title_fullStr In-situ disinfection and a new downstream processing scheme from algal harvesting to lipid extraction using ozone-rich microbubbles for biofuel production
title_full_unstemmed In-situ disinfection and a new downstream processing scheme from algal harvesting to lipid extraction using ozone-rich microbubbles for biofuel production
title_sort in-situ disinfection and a new downstream processing scheme from algal harvesting to lipid extraction using ozone-rich microbubbles for biofuel production
publisher Elsevier
publishDate 2016
url http://eprints.utm.my/id/eprint/72379/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84969217996&doi=10.1016%2fj.algal.2016.05.006&partnerID=40&md5=8af5d113cc95944354bc6f221501f1bc
_version_ 1643656425093726208
score 13.211869

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