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Article

Anaerobic Co-Digestion Effluent as Substrate for Chlorella vulgaris and Scenedesmus obliquus Cultivation

1
Department of Environmental Sciences, Informatics and Statistics, University Ca’ Foscari of Venice, via Torino 155, 30172 Venice, Italy
2
Department of Biotechnology, University of Verona, Strada le Grazie 15, 37134 Verona, Italy
3
Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, 08028 Barcelona, Spain
*
Author to whom correspondence should be addressed.
Energies 2020, 13(18), 4880; https://doi.org/10.3390/en13184880
Received: 31 August 2020 / Revised: 14 September 2020 / Accepted: 14 September 2020 / Published: 17 September 2020
(This article belongs to the Special Issue Bioenergy from Organic Waste)
Anaerobic digestate supernatant can be used as a nutrient source for microalgae cultivation, thus integrating phytoremediation processes with high value products storage in microalgae biomass. Microalgae are able to use nitrogen and phosphorous from digestate, but high nutrient concentration can cause growth inhibition. In this study, two microalgae strains (C. vulgaris and S. obliquus) were cultivated on the anaerobic co-digestion supernatant (obtained from the organic fraction of municipal solid waste (OFMSW) and waste activated sludge (WAS)) in a preliminary Petri plate screening at different dilutions (1:10 and 1:5) using a synthetic medium (ISO) and tap water (TW). Direct Nile red screening was applied on colonies to preliminarily identify hydrophobic compound storage and then a batch test was performed (without air insufflation). Results show that C. vulgaris was able to grow on digestate supernatant 1:5 diluted, while Nile red screening allowed the preliminary detection of hydrophobic compound storage in colonies. The analysis carried out at the end of the test on ammonia, phosphate, nitrate and sulphate showed a removal percentage of 47.5 ± 0.8%, 65.0 ± 6.0%, 95.0 ± 3.0% and 99.5 ± 0.1%, respectively. View Full-Text
Keywords: digestate; anaerobic co-digestion; anaerobic digestion; microalgae; Chlorella vulgaris; Scenedesmus obliquus digestate; anaerobic co-digestion; anaerobic digestion; microalgae; Chlorella vulgaris; Scenedesmus obliquus
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MDPI and ACS Style

Scarponi, P.; Bonetto, A.; Bolzonella, D.; Astals, S.; Cavinato, C. Anaerobic Co-Digestion Effluent as Substrate for Chlorella vulgaris and Scenedesmus obliquus Cultivation. Energies 2020, 13, 4880. https://doi.org/10.3390/en13184880

AMA Style

Scarponi P, Bonetto A, Bolzonella D, Astals S, Cavinato C. Anaerobic Co-Digestion Effluent as Substrate for Chlorella vulgaris and Scenedesmus obliquus Cultivation. Energies. 2020; 13(18):4880. https://doi.org/10.3390/en13184880

Chicago/Turabian Style

Scarponi, Paolina, Alessandro Bonetto, David Bolzonella, Sergi Astals, and Cristina Cavinato. 2020. "Anaerobic Co-Digestion Effluent as Substrate for Chlorella vulgaris and Scenedesmus obliquus Cultivation" Energies 13, no. 18: 4880. https://doi.org/10.3390/en13184880

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