Effect of organic loading rate on the production of Polyhydroxyalkanoates from sewage sludge.

Autor: Isern-Cazorla L; Engineering Department, Palermo University, Viale delle Scienze ed. 8, 90128, Palermo, Italy; GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, School of Engineering, Edifici Q, c/ de les Sitges s/n, Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain., Mineo A; Engineering Department, Palermo University, Viale delle Scienze ed. 8, 90128, Palermo, Italy., Suárez-Ojeda ME; GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, School of Engineering, Edifici Q, c/ de les Sitges s/n, Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain., Mannina G; Engineering Department, Palermo University, Viale delle Scienze ed. 8, 90128, Palermo, Italy. Electronic address: giorgio.mannina@unipa.it.
Jazyk: angličtina
Zdroj: Journal of environmental management [J Environ Manage] 2023 Oct 01; Vol. 343, pp. 118272. Date of Electronic Publication: 2023 May 29.
DOI: 10.1016/j.jenvman.2023.118272
Abstrakt: The aim of this work was to study the effect of organic loading rate on the production of Polyhydroxyalkanoates (PHA) from sewage sludge. Synthesis of PHA using sewage sludge as platform was achieved in this work. Three pilot-scale selection-sequencing batch reactors (S-SBR) were used for obtaining a culture able to accumulate PHA following a strategy of aerobic dynamic feeding (ADF) at different volumetric organic-loading-rate (vOLR): 1.3, 1.8 and 0.8 g COD L -1 d -1 for S-SBR 1, S-SBR 2 and S-SBR 3, respectively. Decreasing the vOLR enhanced the general performance of the process as for organic matter removal (from 99.2% ± 0.3% in S-SBR-3 to 92 ± 2 in S-SBR-2) while the opposite trend was recorded for PHA production (6.0 PHA % w/w in S-SBR-3 vs 13.7 PHA % w/w in S-SBR-2 at the end of the feast phase). Furthermore, indirect and direct emissions, as N2O, were evaluated during the process for the first time. Finally, three accumulation tests were performed achieving 24% w/w.
Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Giorgio Mannina reports a relationship with University of Palermo that includes: board membership.
(Copyright © 2023 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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