Conventional activated sludge vs. photo-sequencing batch reactor for enhanced nitrogen removal in municipal wastewater: Microalgal-bacterial consortium and pathogenic load insights.

Autor: Clagnan E; Free University of Bolzano, Faculty of Science and Technology, Piazza Università 1, 39100 Bolzano, Italy; Department for Sustainability, Biotechnologies and Agroindustry Division, ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Casaccia Research Center, Via Anguillarese 301 00123 Rome, Italy; Gruppo Ricicla Labs, Dipartimento di Scienze Agrarie e Ambientali - Produzione, Territorio, Agroenergia (DiSAA), Università Degli Studi di Milano, Via Celoria 2 20133 Milano, Italy., Petrini S; University of Trento, Department of Civil, Environmental and Mechanical Engineering, Via Mesiano 77 38123, Trento, Italy., Pioli S; Free University of Bolzano, Faculty of Science and Technology, Piazza Università 1, 39100 Bolzano, Italy; Institute of Research on Terrestrial Ecosystems (IRET), National Research Council (CNR), Monterotondo Scalo RM, Italy., Piergiacomo F; Free University of Bolzano, Faculty of Science and Technology, Piazza Università 1, 39100 Bolzano, Italy., Chowdhury AA; Free University of Bolzano, Faculty of Science and Technology, Piazza Università 1, 39100 Bolzano, Italy., Brusetti L; Free University of Bolzano, Faculty of Science and Technology, Piazza Università 1, 39100 Bolzano, Italy. Electronic address: Lorenzo.Brusetti@unibz.it., Foladori P; University of Trento, Department of Civil, Environmental and Mechanical Engineering, Via Mesiano 77 38123, Trento, Italy.
Jazyk: angličtina
Zdroj: Bioresource technology [Bioresour Technol] 2024 Jun; Vol. 401, pp. 130735. Date of Electronic Publication: 2024 Apr 24.
DOI: 10.1016/j.biortech.2024.130735
Abstrakt: Municipal wastewater treatment plants are mostly based on traditional activated sludge (AS) processes. These systems are characterised by major drawbacks: high energy consumption, large amount of excess sludge and high greenhouse gases emissions. Treatment through microalgal-bacterial consortia (MBC) is an alternative and promising solution thanks to lower energy consumption and emissions, biomass production and water sanitation. Here, microbial difference between a traditional anaerobic sludge (AS) and a consortium-based system (photo-sequencing batch reactor (PSBR)) with the same wastewater inlet were characterised through shotgun metagenomics. Stable nitrification was achieved in the PSBR ensuring ammonium removal > 95 % and significant total nitrogen removal thanks to larger flocs enhancing denitrification. The new system showed enhanced pathogen removal, a higher abundance of photosynthetic and denitrifying microorganisms with a reduced emissions potential identifying this novel PSBR as an effective alternative to AS.
Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Paola Foladori reports financial support was provided by University of Trento. Serena Petrini reports financial support was provided by University of Trento. Silvia Pioli reports financial support was provided by Free University of Bozen-Bolzano. Federica Piergiacomo reports financial support was provided by Free University of Bozen-Bolzano. Atif Aziz Chowdhury reports financial support was provided by Free University of Bozen-Bolzano. Clagnan Elisa reports financial support was provided by Free University of Bozen-Bolzano. Brusetti Lorenzo reports financial support was provided by Free University of Bozen-Bolzano. If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper..
(Copyright © 2024 The Author(s). Published by Elsevier Ltd.. All rights reserved.)
Databáze: MEDLINE
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