TY - JOUR
T1 - Effective nutrient removal and metabolite accumulation by C. vulgaris cultivated using digested food waste and brine
AU - Giwa, Adewale
AU - Chalermthai, Bushra
AU - Moheimani, Navid
AU - Taher, Hanifa
N1 - Funding Information:
Khalifa University of Science and Technology is appreciated for providing the funding for this project (CIRA-2019-035). Research Center for Innovation in CO2 and H2 (RICH centre), Khalifa University of Science and Technology, is appreciated for grant RCII-2019-007. Abu Dhabi National Exhibition Center is appreciated for donating the LFW and Prof. Sulaiman Al-Zuhair of United Arab Emirates University (UAEU) is appreciated for donating the C. vulgaris strain. No conflicts, informed consent, or human or animal rights are applicable to this study.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/11
Y1 - 2021/11
N2 - Anaerobically digested food effluent (or liquefied food waste) was diluted with synthetic brine to prepare new media for cultivating Chlorella vulgaris. The media were prepared from different ratios of liquefied food waste and synthetic brine. These ratios were 1:1, 1:2, and 1:3 and the media were named as CM2, CM3, and CM4, respectively. Johnson's medium was employed as the control medium and it was named as CM1. C. vulgaris utilized more ammonium and phosphate from the new media than Johnson's medium, although Johnson's medium ensured higher carbon uptake. Compared to Johnson's medium, the specific nitrogen removal by C. vulgaris cultivated using CM2, CM3, and CM4 was 89%, 81%, and 28% higher, respectively. The specific phosphorus removal by C. vulgaris cultivated using CM2, CM3, and CM4 was higher than that of Johnson's medium by 137%, 75%, and 63%, respectively. Also, the increase in weight of C. vulgaris ensured by CM2, CM3, and CM4 was about 38%, 32%, and 30% respectively, higher than that of CM1. Consequently, the developed media ensured higher productivity and faster harvesting of C. vulgaris biomass than Johnson's medium. Settling times of 11 min, 6.85 min, 7.08 min, and 7.4 min were required by CM1, CM2, CM3, and CM4 cultures, respectively, to achieve a clear supernatant volume of 25 mL. The metabolites accumulated by C. vulgaris biomass, which was cultivated using the new media, include proteins and carotenoids. Overall, liquefied food waste improved nutrient removal efficiency, settling time and osmoregulation whereas synthetic brine aided carotenoid synthesis.
AB - Anaerobically digested food effluent (or liquefied food waste) was diluted with synthetic brine to prepare new media for cultivating Chlorella vulgaris. The media were prepared from different ratios of liquefied food waste and synthetic brine. These ratios were 1:1, 1:2, and 1:3 and the media were named as CM2, CM3, and CM4, respectively. Johnson's medium was employed as the control medium and it was named as CM1. C. vulgaris utilized more ammonium and phosphate from the new media than Johnson's medium, although Johnson's medium ensured higher carbon uptake. Compared to Johnson's medium, the specific nitrogen removal by C. vulgaris cultivated using CM2, CM3, and CM4 was 89%, 81%, and 28% higher, respectively. The specific phosphorus removal by C. vulgaris cultivated using CM2, CM3, and CM4 was higher than that of Johnson's medium by 137%, 75%, and 63%, respectively. Also, the increase in weight of C. vulgaris ensured by CM2, CM3, and CM4 was about 38%, 32%, and 30% respectively, higher than that of CM1. Consequently, the developed media ensured higher productivity and faster harvesting of C. vulgaris biomass than Johnson's medium. Settling times of 11 min, 6.85 min, 7.08 min, and 7.4 min were required by CM1, CM2, CM3, and CM4 cultures, respectively, to achieve a clear supernatant volume of 25 mL. The metabolites accumulated by C. vulgaris biomass, which was cultivated using the new media, include proteins and carotenoids. Overall, liquefied food waste improved nutrient removal efficiency, settling time and osmoregulation whereas synthetic brine aided carotenoid synthesis.
KW - Chlorella vulgaris
KW - Cultivation media
KW - Desalination brine
KW - Liquefied food waste
KW - Microalgae
UR - http://www.scopus.com/inward/record.url?scp=85122682311&partnerID=8YFLogxK
U2 - 10.1016/j.eti.2021.101935
DO - 10.1016/j.eti.2021.101935
M3 - Article
AN - SCOPUS:85122682311
SN - 2352-1864
VL - 24
JO - Environmental Technology and Innovation
JF - Environmental Technology and Innovation
M1 - 101935
ER -