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Vadiveloo A, Foster L, Kwambai C, Bahri PA, Moheimani NR. Microalgae cultivation for the treatment of anaerobically digested municipal centrate (ADMC) and anaerobically digested abattoir effluent (ADAE). THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 775:145853. [PMID: 33621869 DOI: 10.1016/j.scitotenv.2021.145853] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 02/03/2021] [Accepted: 02/10/2021] [Indexed: 05/12/2023]
Abstract
The successful cultivation of microalgae in wastewater establishes a waste to profit scenario as it combines treatment of a waste stream with production of valuable end-products. Here, growth and nutrient removal efficiency of three different locally isolated microalgal cultures (Chlorella sp., Scenedesmus sp., and a mixed consortium) cultivated in anaerobically digested municipal centrate (ADMC) and anaerobically digested abattoir effluent (ADAE) was evaluated. No significant differences (P > 0.05) in specific growth rate and biomass productivity were recorded between Chlorella monocultures and the mixed culture grown in both effluents. Scenedesmus sp. monocultures was found incapable of growth in both ADMC and ADAE throughout the cultivation period resulting in the collapse of cultures and no further measurements on the growth, biomass production and nutrient removal efficiency of this alga in both effluent. Fq´/Fm´ values which represent the immediate photo-physiological status of microalgae found to be negatively inhibited when Scenedesmus sp. was grown in both effluents throughout the cultivation period. Fq´/Fm´ values of Chlorella sp. monocultures and the mixed cultures recovered back to normal (≈0.6) after an initial drop. Ammonium removal rates was found to be significantly higher (≈2 folds) for Chlorella sp. monocultures grown in both ADMC and ADAE when compared to the mixed cultures. Nonetheless, no significant differences were observed in the removal of phosphate for both cultures in the different effluents. The total protein and carbohydrate content of the biomass produced was similar for both microalgae cultures grown using ADAE and ADMC. However, chlorophyll a and total carotenoids content were found to be higher (P < 0.05) for the cultures grown in ADAE than ADMC. Overall, Chlorella sp. monoculture was the most efficient option for treating both ADMC and ADAE while simultaneously generating protein rich biomass (up to 49%) that can be potentially exploited as aquaculture feedstock.
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Affiliation(s)
- Ashiwin Vadiveloo
- Algae R & D Centre, Environmental and Conservation Sciences, College of Science, Health, Engineering and Education School, Murdoch University, 90 South Street, Murdoch, WA 6150, Australia; Centre of Water, Energy, Waste, Harry Butler Institute, Murdoch University, Murdoch, WA 6150, Australia
| | - Louise Foster
- Algae R & D Centre, Environmental and Conservation Sciences, College of Science, Health, Engineering and Education School, Murdoch University, 90 South Street, Murdoch, WA 6150, Australia
| | - Cherono Kwambai
- Algae R & D Centre, Environmental and Conservation Sciences, College of Science, Health, Engineering and Education School, Murdoch University, 90 South Street, Murdoch, WA 6150, Australia
| | - Parisa A Bahri
- Engineering and Energy, College of Science, Health, Engineering and Education, Murdoch University, 90 South Street, Murdoch, WA 6150, Australia
| | - Navid R Moheimani
- Algae R & D Centre, Environmental and Conservation Sciences, College of Science, Health, Engineering and Education School, Murdoch University, 90 South Street, Murdoch, WA 6150, Australia; Centre of Water, Energy, Waste, Harry Butler Institute, Murdoch University, Murdoch, WA 6150, Australia.
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Li LH, Li XY, Hong Y, Jiang MR, Lu SL. Use of microalgae for the treatment of black and odorous water: Purification effects and optimization of treatment conditions. ALGAL RES 2020. [DOI: 10.1016/j.algal.2020.101851] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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