Combining biotechnology with circular bioeconomy: From poultry, swine, cattle, brewery, dairy and urban wastewaters to biohydrogen
- LNEG, National Laboratory of Energy and Geology I.P. /Bioenergy Unit, Estrada do Paço do Lumiar 22, 1649-038 Lisbon (Portugal)
- Federal University of Viçosa/Civil Department, Avenida PH Rolfs s/n, 36570-900 Viçosa, MG (Brazil)
- Federal University of Juiz de Fora (UFJF), Institute of Biological Sciences, Campus São Pedro, 36036-900, Juiz de Fora, MG (Brazil)
- iBB, Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Departamento de Bioengenharia, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa (Portugal)
Highlights: • Poultry, swine, cattle, brewery, dairy and urban WWs could be microalga-based treated. • Removal efficiency ranges were 95–100% for N, 63–99% for P and 48–70% for COD. • Higher biohydrogen production yield was obtained using poultry and swine wastewaters. The ability of microalgae to grow in nutrient-rich environments and to accumulate nutrients from wastewaters (WW) makes them attractive for the sustainable and low-cost treatment of WW. The valuable biomass produced can be further used for the generation of bioenergy, animal feed, fertilizers, and biopolymers, among others. In this study, Scenedesmus obliquus was able to remove nutrients from different wastewaters (poultry, swine and cattle breeding, brewery and dairy industries, and urban) with removal ranges of 95–100% for nitrogen, 63–99% for phosphorus and 48–70% for chemical oxygen demand. The biomass productivity using wastewaters was higher (except for poultry) than in synthetic medium (Bristol), the highest value being obtained in brewery wastewater (1025 mg/(L.day) of freeze-dried biomass). The produced biomass contained 31–53% of proteins, 12–36% of sugars and 8–23% of lipids, regardless of the type of wastewater. The potential of the produced Scenedesmus obliquus biomass for the generation of BioH{sub 2} through batch dark fermentation processes with Enterobacter aerogenes was evaluated. The obtained yields ranged, in mL H{sub 2}/g Volatile Solids (VS), from 50.1 for biomass from anaerobically digested cattle WW to 390 for swine WW, whereas the yield with biomass cultivated in Bristol medium was 57.6 mL H{sub 2}/g{sub VS}.
- OSTI ID:
- 23095652
- Journal Information:
- Environmental Research, Vol. 164; Other Information: Copyright (c) 2018 Elsevier Inc. All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0013-9351
- Country of Publication:
- United States
- Language:
- English
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