TY - JOUR
T1 - Performance of bleaching clays in dechlorophyllisation of microalgal oil
T2 - 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 - Alharthi, Sarah
AU - Alsanie, Walaa F.
AU - Show, Pau Loke
N1 - Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/6
Y1 - 2023/6
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 - Adsorption
KW - Bentonite
KW - Decolourization
KW - Regeneration
KW - Spent bleaching clay
UR - https://www.scopus.com/pages/publications/85150054296
U2 - 10.1016/j.procbio.2023.03.002
DO - 10.1016/j.procbio.2023.03.002
M3 - Article
AN - SCOPUS:85150054296
SN - 1359-5113
VL - 129
SP - 94
EP - 101
JO - Process Biochemistry
JF - Process Biochemistry
ER -