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.
Conventional Activated Sludge vs. Photo-Sequencing Batch Reactor for Enhanced Nitrogen Removal in Municipal Wastewater: Microalgal-Bacterial Consortium and Pathogenic Load Insights / Clagnan, Elisa; Petrini, Serena; Pioli, Silvia; Piergiacomo, Federica; Chowdhury, Atif Aziz; Brusetti, Lorenzo; Foladori, Paola. - In: BIORESOURCE TECHNOLOGY. - ISSN 0960-8524. - 2024, 401:(2024), pp. 1-11. [10.1016/j.biortech.2024.130735]
Conventional Activated Sludge vs. Photo-Sequencing Batch Reactor for Enhanced Nitrogen Removal in Municipal Wastewater: Microalgal-Bacterial Consortium and Pathogenic Load Insights
Petrini, Serena;Foladori, PaolaUltimo
2024-01-01
Abstract
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.File | Dimensione | Formato | |
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