Abstract
The microalgae Dunaliella salina is industrially produced due to its high content in carotenoids induced by low nitrogen and high salinity conditions. D. salina with low carotenoids content also produces other added value compounds, however its recovery have hardly been studied. This work aims to examine the potential of pre-concentrating D. salina by membrane processing prior to a final harvesting step by low-shear centrifugation. The aim is to minimize the overall energy expenditure and reduce capital costs, while assuring a minimal loss of cell integrity. This task is challenging, considering the sensitivity of D. salina to shear. Harvesting of D. salina by ultrafiltration allowed reaching a final concentration factor of 5.9, with an average permeate flux of 31 L/(m2 h). The Total Cost of Ownership and energy consumption for harvesting are respectively 52% and 45% lower when applying a two-step approach with pre-concentration (ultrafiltration) compared to only harvesting by centrifugation.
| Original language | English |
|---|---|
| Pages (from-to) | 252-260 |
| Number of pages | 9 |
| Journal | Separation and Purification Technology |
| Volume | 190 |
| DOIs | |
| Publication status | Published - 1 Jan 2018 |
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Keywords
- Cross-flow membrane filtration
- Dunaliella salina
- Low-shear spiral plate centrifugation
- Microalgae harvesting
- Ultrafiltration
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Harvesting of Dunaliella salina by membrane filtration at pilot scale. / Monte, Joana; Sá, Marta; Galinha, Cláudia F.; Costa, Luís; Hoekstra, Herre; Brazinha, Carla; Crespo, João G.
In: Separation and Purification Technology, Vol. 190, 01.01.2018, p. 252-260.Research output: Contribution to journal › Article
TY - JOUR
T1 - Harvesting of Dunaliella salina by membrane filtration at pilot scale
AU - Monte, Joana
AU - Sá, Marta
AU - Galinha, Cláudia F.
AU - Costa, Luís
AU - Hoekstra, Herre
AU - Brazinha, Carla
AU - Crespo, João G.
N1 - Sem PDF conforme despacho. info:eu-repo/grantAgreement/FCT/5876/147218/PT# info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F79533%2F2011/PT# info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F95864%2F2013/PT# Associate Laboratory for Green Chemistry LAQV - FCT/MEC (UID/QUI/50006/2013) ERDF under the PT Partnership Agreement (POCI-01-0145-FEDER - 007265) King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) (OSR-2016-CPF-2907-05) Fundacao para a Ciencia e a Tecnologia, Portugal (SFRH/BPD/79533/2011; SFRH/BPD/95864/2013; SFRH/BD/108894/2015)
PY - 2018/1/1
Y1 - 2018/1/1
N2 - The microalgae Dunaliella salina is industrially produced due to its high content in carotenoids induced by low nitrogen and high salinity conditions. D. salina with low carotenoids content also produces other added value compounds, however its recovery have hardly been studied. This work aims to examine the potential of pre-concentrating D. salina by membrane processing prior to a final harvesting step by low-shear centrifugation. The aim is to minimize the overall energy expenditure and reduce capital costs, while assuring a minimal loss of cell integrity. This task is challenging, considering the sensitivity of D. salina to shear. Harvesting of D. salina by ultrafiltration allowed reaching a final concentration factor of 5.9, with an average permeate flux of 31 L/(m2 h). The Total Cost of Ownership and energy consumption for harvesting are respectively 52% and 45% lower when applying a two-step approach with pre-concentration (ultrafiltration) compared to only harvesting by centrifugation.
AB - The microalgae Dunaliella salina is industrially produced due to its high content in carotenoids induced by low nitrogen and high salinity conditions. D. salina with low carotenoids content also produces other added value compounds, however its recovery have hardly been studied. This work aims to examine the potential of pre-concentrating D. salina by membrane processing prior to a final harvesting step by low-shear centrifugation. The aim is to minimize the overall energy expenditure and reduce capital costs, while assuring a minimal loss of cell integrity. This task is challenging, considering the sensitivity of D. salina to shear. Harvesting of D. salina by ultrafiltration allowed reaching a final concentration factor of 5.9, with an average permeate flux of 31 L/(m2 h). The Total Cost of Ownership and energy consumption for harvesting are respectively 52% and 45% lower when applying a two-step approach with pre-concentration (ultrafiltration) compared to only harvesting by centrifugation.
KW - Cross-flow membrane filtration
KW - Dunaliella salina
KW - Low-shear spiral plate centrifugation
KW - Microalgae harvesting
KW - Ultrafiltration
UR - http://www.scopus.com/inward/record.url?scp=85028743738&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2017.08.019
DO - 10.1016/j.seppur.2017.08.019
M3 - Article
VL - 190
SP - 252
EP - 260
JO - Separation and Purification Technology
JF - Separation and Purification Technology
SN - 1383-5866
ER -