TY - JOUR
T1 - Performance of bleaching clays in dechlorophyllisation of microalgal oil: A comparative study
AU - Tang, Doris Ying Ying
AU - Chew, Kit Wayne
AU - Gentili, Francesco G.
AU - Kurniawan, Tonni Agustiono
AU - Park, Young-Kwon
AU - Munawaroh, Heli Siti Halimatul
AU - Rajendran, Saravanan
AU - Ma, Zengling
AU - Alharthii, Sarah
AU - Alsaniejk, Walaa F.
AU - Show, Pau Loke
PY - 2023
Y1 - 2023
N2 - While clay has been extensively studied for its ability to remove chlorophyll from vegetable oil, its effects and suitability on microalgae oil have received far less attention. In this study, three different clay types are evaluated and compared for their ability to dechlorophyllise microalgae oil. The clays involved are kaolinite, Fuller's earth and bentonite clay which are activated by acid treatment. Bentonite clay is found to remove chlorophyll effectively (76.04%) than kaolinite and Fuller's earth due to the presence of porous materials that facilitate adsorption. Additionally, the conditions of high temperature (79.69%) and ultrasound treatment (84.24%) demonstrate satisfactory chlorophyll removal efficiency. Another promising finding is that chlorophyll can be adsorbed on the clays without affecting the lipid composition in the microalgae extract significantly. Spent bleaching clay disposal is a growing issue that poses an environmental burden. Reusing bleaching clay can lower expenses and increase oil recovery. In a single sequential run, using spent bentonite clay yields the outcomes comparable to those of virgin bentonite clay. This finding offers a useful green and environmentally friendly approach to remove chlorophyll from microalgae oil feedstock.
AB - While clay has been extensively studied for its ability to remove chlorophyll from vegetable oil, its effects and suitability on microalgae oil have received far less attention. In this study, three different clay types are evaluated and compared for their ability to dechlorophyllise microalgae oil. The clays involved are kaolinite, Fuller's earth and bentonite clay which are activated by acid treatment. Bentonite clay is found to remove chlorophyll effectively (76.04%) than kaolinite and Fuller's earth due to the presence of porous materials that facilitate adsorption. Additionally, the conditions of high temperature (79.69%) and ultrasound treatment (84.24%) demonstrate satisfactory chlorophyll removal efficiency. Another promising finding is that chlorophyll can be adsorbed on the clays without affecting the lipid composition in the microalgae extract significantly. Spent bleaching clay disposal is a growing issue that poses an environmental burden. Reusing bleaching clay can lower expenses and increase oil recovery. In a single sequential run, using spent bentonite clay yields the outcomes comparable to those of virgin bentonite clay. This finding offers a useful green and environmentally friendly approach to remove chlorophyll from microalgae oil feedstock.
KW - Bentonite
KW - Adsorption
KW - Decolourization
KW - Spent bleaching clay
KW - Regeneration
KW - Bentonite
KW - Adsorption
KW - Decolourization
KW - Spent bleaching clay
KW - Regeneration
UR - https://res.slu.se/id/publ/121903
U2 - 10.1016/j.procbio.2023.03.002
DO - 10.1016/j.procbio.2023.03.002
M3 - Journal article
SN - 1359-5113
VL - 129
SP - 94
EP - 101
JO - Process Biochemistry
JF - Process Biochemistry
ER -