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AuthorKashem, Abdurahman Hafez Mohammed
AuthorDas, Probir
AuthorAbdulQuadir, Mohammad
AuthorKhan, Shoyeb
AuthorThaher, Mahmoud Ibrahim
AuthorAlghasal, Ghamza
AuthorHawari, Alaa H.
AuthorAl-Jabri, Hareb
Available date2023-05-23T09:39:15Z
Publication Date2023
Publication NameScience of the Total Environment
ResourceScopus
URIhttp://dx.doi.org/10.1016/j.scitotenv.2023.162384
URIhttp://hdl.handle.net/10576/43375
AbstractRapid aquaculture industry development contributed to a major increase in aquaculture wastewater generation. In the context of a circular economy, aquaculture wastewater treatment should simultaneously recover nutrients from the wastewater. Among many treatment methods, bioremediation using microalgae could be a cost-effective and environmentally friendly system that can be applied to treat aquaculture wastewater and simultaneously produce high-value microalgal biomass. This study explored the feasibility of treating brackish wastewater (0.8 % NaCl) generated from a Qatari commercial tilapia farm by microalgae. At first, 10 strains were grown using wastewater from the local farm in an indoor experiment. Based on nitrogen assimilation, biomass yield, biomass quality, and ease of harvesting, 4 candidate strains (Haematococcus sp., Neochloris sp., Monoraphidium sp., and Nostoc sp.) were shortlisted for outdoor growth experiments. Although Nostoc sp. could not grow outdoor in the wastewater, the other three strains were able to assimilate at least 70.5 % of the total nitrogen in the wastewater. Haematococcus sp. and Neochloris sp. could be harvested using self-settling, whereas Monoraphidium required an energy-intensive tangential flow filtration membrane process. Hence, the overall energy requirement for bioremediation, including biomass dewatering, for Haematococcus sp., Neochloris sp., and Monoraphidium sp. were determined as 0.64, 0.78, and 5.68 MJ/m3, respectively. Neochloris sp. had almost twice the biomass yield compared to Haematococcus sp. - suggesting that Neochloris sp. could be a potential candidate for aquaculture wastewater treatment. 2023 Elsevier B.V.
SponsorThe authors would like to acknowledge the support of the Qatar National Research Fund (QNRF, a member of Qatar Foundation) for providing the funding (under grant GSRA8-L-2-0509-21037 ) for this study.
Languageen
PublisherElsevier
SubjectAquaculture wastewater
Biomass
Bioremediation
Microalgae
Neochloris sp
Tilapia
TitleMicroalgal bioremediation of brackish aquaculture wastewater
TypeArticle
Volume Number873
dc.accessType Abstract Only


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