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AuthorDas P.
AuthorThaher M.I.
AuthorKhan S.
AuthorAbdulQuadir M.
AuthorChaudhary A.K.
AuthorAlghasal G.
AuthorAl-Jabri H.
Available date2020-04-01T09:45:57Z
Publication Date2019
Publication NameInternational Journal of Environmental Science and Technology
ResourceScopus
ISSN17351472
URIhttp://dx.doi.org/10.1007/s13762-019-02364-w
URIhttp://hdl.handle.net/10576/13721
AbstractThe present study investigated the growth, harvesting, biocrude conversion, and recycling of the HTL aqueous phase for one self-settling (i.e., Chlorocystis sp.) and another non-settling (i.e., Picochlorum sp.) marine microalgae. Both the strains were grown simultaneously in 2 identical 25,000-L raceway ponds in the Qatari desert. The cell size of Picochlorum sp. was small (2–3 µm), and its biomass was harvested using a centrifuge. Cells of Chlorocystis sp. (6–9 µm) formed flocs that settled spontaneously in a sedimentation chamber. Harvested biomass of these two strains was then converted to biocrude oil, using a 500-mL Parr reactor. The biocrude yield of Picochlorum sp. and Chlorocystis sp. was 39.6 ± 1.15% and 34.8 ± 1.65%, respectively. The energy content of the biocrude oil was 32.78 and 33.38 MJ/kg for Chlorocystis sp. and Picochlorum sp., respectively. Both the strains were capable of efficiently utilizing more than 95% nitrogen of the HTL aqueous phase. Although lower biocrude yield was obtained from Chlorocystis sp., compared to Picochlorum sp., harvesting of Chlorocystis sp. would require much lower energy compared to Picochlorum sp. Therefore, a self-settling microalgae (e.g., Chlorocystis sp.) could potentially be a better candidate, over non-settling microalgae, for producing biofuel feedstock.
SponsorOpen Access funding provided by the Qatar National Library. The authors would like to acknowledge the support of Qatar National Research Fund (QNRF, a member of Qatar Foundation) for providing the funding (under Grant NPRP8-646-2-272) for this study. The authors appreciate the assistance of Ms. Noora (from ESE labs) and Dr. Ahmed (from CLU) for GC?MS and CHN analyses, respectively.
Languageen
PublisherCenter for Environmental and Energy Research and Studies
SubjectBiocrude
Contamination
Hydrothermal liquefaction
Large-scale microalgae cultivation
Marine microalgae
Nutrient recycling
TitleComparison of biocrude oil production from self-settling and non-settling microalgae biomass produced in the Qatari desert environment
TypeArticle
Pagination7443-7454
Issue Number11
Volume Number16
dc.accessType Open Access


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