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Long term outdoor microalgal phycoremediation of anaerobically digested abattoir effluent.
J Environ Manage. 2022 Dec 01; 323:116322.JE

Abstract

Sufficient and reliable long-term field data on the growth, productivity and nutrient removal rates of microalgal based wastewater treatment system is essential to validate its overall techno-economic feasibility. Here, we investigated the semi-continuous microalgal cultivation of Scenedesmus sp. in anaerobically digested abattoir effluent (ADAE) for 13 months in outdoor raceway ponds operated at 20 cm depth. This study was initiated with three different cultures consisting of 1) monocultures of Chlorella sp., 2) Scenedesmus sp., and 3) an equal mixed concentration of both microalgae species. However, after 15 weeks, Scenedesmus sp. was found to be the most dominant microalgae species in all the different cultures, even completely taking over the Chlorella sp. monoculture. Over the course of summer and early autumn, the average weekly biomass productivity of Scenedesmus sp. cultures was 12.5 ± 0.6 g m-2 d-1 which was 16% and 30% higher than productivities recorded in spring and winter, respectively. All available ammoniacal nitrogen (NH3-N) was found to be exhausted during each growth period with an average 33.6% nitrogen assimilation rate. The average rate of phosphate and COD (chemical oxygen demand) removals were 85.2% and 37.5% throughout the cultivation period. No significant differences were found in carbohydrate, lipid and protein content of Scenedesmus sp. during different seasons of the year. Over 53% increase in biomass productivity can be achieved if CO2 is added to control culture pH at pH 6.5. Here, we successfully demonstrated reliability of continuous long-term cultivation of microalgae in ADAE for simultaneous wastewater treatment and algal biomass production.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Shayesteh H
Algae R&D Centre, Discipline of Environmental and Conservation Sciences, Murdoch University, WA, 6150, Australia.
Vadiveloo A
Algae R&D Centre, Discipline of Environmental and Conservation Sciences, Murdoch University, WA, 6150, Australia; Centre for Water, Energy and Waste, Harry Butler Institute, Murdoch University, Murdoch, WA, 6150, Australia.
Bahri PA
Discipline of Engineering and Energy, Murdoch University, 90 South Street, Murdoch, WA, 6150, Australia; Centre for Water, Energy and Waste, Harry Butler Institute, Murdoch University, Murdoch, WA, 6150, Australia.
Moheimani NR
Algae R&D Centre, Discipline of Environmental and Conservation Sciences, Murdoch University, WA, 6150, Australia; Centre for Water, Energy and Waste, Harry Butler Institute, Murdoch University, Murdoch, WA, 6150, Australia. Electronic address: n.moheimani@murdoch.edu.au.

MeSH

MicroalgaeChlorellaAbattoirsCarbon DioxideReproducibility of ResultsScenedesmusNitrogenPhosphatesCarbohydratesLipids

Pub Type(s)

Journal Article

Language

eng

PubMed ID

36261972

Citation

Shayesteh, Hajar, et al. "Long Term Outdoor Microalgal Phycoremediation of Anaerobically Digested Abattoir Effluent." Journal of Environmental Management, vol. 323, 2022, p. 116322.
Shayesteh H, Vadiveloo A, Bahri PA, et al. Long term outdoor microalgal phycoremediation of anaerobically digested abattoir effluent. J Environ Manage. 2022;323:116322.
Shayesteh, H., Vadiveloo, A., Bahri, P. A., & Moheimani, N. R. (2022). Long term outdoor microalgal phycoremediation of anaerobically digested abattoir effluent. Journal of Environmental Management, 323, 116322. https://doi.org/10.1016/j.jenvman.2022.116322
Shayesteh H, et al. Long Term Outdoor Microalgal Phycoremediation of Anaerobically Digested Abattoir Effluent. J Environ Manage. 2022 Dec 1;323:116322. PubMed PMID: 36261972.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Long term outdoor microalgal phycoremediation of anaerobically digested abattoir effluent. AU - Shayesteh,Hajar, AU - Vadiveloo,Ashiwin, AU - Bahri,Parisa A, AU - Moheimani,Navid R, Y1 - 2022/09/22/ PY - 2022/07/06/received PY - 2022/08/10/revised PY - 2022/09/16/accepted PY - 2022/10/20/entrez PY - 2022/10/21/pubmed PY - 2022/10/22/medline KW - Biomass productivity KW - Nutrient removal KW - Reclaimed water KW - Red meat processors KW - Wastewater SP - 116322 EP - 116322 JF - Journal of environmental management JO - J Environ Manage VL - 323 N2 - Sufficient and reliable long-term field data on the growth, productivity and nutrient removal rates of microalgal based wastewater treatment system is essential to validate its overall techno-economic feasibility. Here, we investigated the semi-continuous microalgal cultivation of Scenedesmus sp. in anaerobically digested abattoir effluent (ADAE) for 13 months in outdoor raceway ponds operated at 20 cm depth. This study was initiated with three different cultures consisting of 1) monocultures of Chlorella sp., 2) Scenedesmus sp., and 3) an equal mixed concentration of both microalgae species. However, after 15 weeks, Scenedesmus sp. was found to be the most dominant microalgae species in all the different cultures, even completely taking over the Chlorella sp. monoculture. Over the course of summer and early autumn, the average weekly biomass productivity of Scenedesmus sp. cultures was 12.5 ± 0.6 g m-2 d-1 which was 16% and 30% higher than productivities recorded in spring and winter, respectively. All available ammoniacal nitrogen (NH3-N) was found to be exhausted during each growth period with an average 33.6% nitrogen assimilation rate. The average rate of phosphate and COD (chemical oxygen demand) removals were 85.2% and 37.5% throughout the cultivation period. No significant differences were found in carbohydrate, lipid and protein content of Scenedesmus sp. during different seasons of the year. Over 53% increase in biomass productivity can be achieved if CO2 is added to control culture pH at pH 6.5. Here, we successfully demonstrated reliability of continuous long-term cultivation of microalgae in ADAE for simultaneous wastewater treatment and algal biomass production. SN - 1095-8630 UR - https://www.unboundmedicine.com/medline/citation/36261972/Long_term_outdoor_microalgal_phycoremediation_of_anaerobically_digested_abattoir_effluent_ DB - PRIME DP - Unbound Medicine ER -