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EnglishThe occurrence, fate and removal of microplastics (MPs) in a wastewater treatment plant (WWTP) in Central Italy were investigated together with their potential adverse effects on anaerobic processes. In the influent of the WWTP, 3.6 MPs.L−1 were detected that mostly comprised polyester fibers and particles in the shape of films, ranging 0.1–0.5 mm and made of polyethylene and polypropylene (PP). The full-scale conventional activated sludge scheme removed 86% of MPs, with the main reduction in the primary and secondary settling. MPs particles bigger than 1 mm were not detected in the final effluent and some loss of polymers types were observed. In comparison, the pilot-scale upflow granular anaerobic sludge blanket (UASB) + anaerobic membrane bioreactor (AnMBR) configuration achieved 94% MPs removal with the abatement of 87% of fibers and 100% of particles. The results highlighted an accumulation phenomenon of MPs in the sludge and suggested the need to further investigate the effects of MPs on anaerobic processes. Accordingly, PP-MPs at concentrations from 5 PP-MPs.gTS−1 to 50 PP-MPs.gTS−1 were spiked in the pilot-scale UASB reactor that was fed with real municipal wastewater, where up to 58% decrease in methanogenic activity was observed at the exposure of 50 PP-MPs.gTS−1. To the best of our knowledge, the presented results are the first to report of PP-MPs inhibition on anaerobic processes.
| Autori: | |
| Autori: | Pittura, L.; Foglia, A.; Akyol, C.; Cipolletta, G.; Benedetti, M.; Regoli, F.; Eusebi, A. L.; Sabbatini, S.; Tseng, L. Y.; Katsou, E.; Gorbi, S.; Fatone, F. |
| Titolo: | Microplastics in real wastewater treatment schemes: Comparative assessment and relevant inhibition effects on anaerobic processes |
| Numero degli autori: | 12 |
| Data di pubblicazione: | 2021 |
| Rivista: | CHEMOSPHERE |
| Codice identificativo ISI: | WOS:000587290300186 |
| Codice identificativo Scopus: | 2-s2.0-85091637024 |
| Revisione (peer review): | Esperti anonimi |
| Lingua: | Inglese |
| Rilevanza: | Internazionale |
| Volume: | 262 |
| Pagina iniziale: | 128415 |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.chemosphere.2020.128415 |
| Codice identificativo Pubmed: | 33182128 |
| Abstract: | The occurrence, fate and removal of microplastics (MPs) in a wastewater treatment plant (WWTP) in Central Italy were investigated together with their potential adverse effects on anaerobic processes. In the influent of the WWTP, 3.6 MPs.L−1 were detected that mostly comprised polyester fibers and particles in the shape of films, ranging 0.1–0.5 mm and made of polyethylene and polypropylene (PP). The full-scale conventional activated sludge scheme removed 86% of MPs, with the main reduction in the primary and secondary settling. MPs particles bigger than 1 mm were not detected in the final effluent and some loss of polymers types were observed. In comparison, the pilot-scale upflow granular anaerobic sludge blanket (UASB) + anaerobic membrane bioreactor (AnMBR) configuration achieved 94% MPs removal with the abatement of 87% of fibers and 100% of particles. The results highlighted an accumulation phenomenon of MPs in the sludge and suggested the need to further investigate the effects of MPs on anaerobic processes. Accordingly, PP-MPs at concentrations from 5 PP-MPs.gTS−1 to 50 PP-MPs.gTS−1 were spiked in the pilot-scale UASB reactor that was fed with real municipal wastewater, where up to 58% decrease in methanogenic activity was observed at the exposure of 50 PP-MPs.gTS−1. To the best of our knowledge, the presented results are the first to report of PP-MPs inhibition on anaerobic processes. |
| Parole Chiave: | Microplastics; Municipal wastewater; Polypropylene; Sewage sludge; UASB; Anaerobiosis; Bioreactors; Italy; Microplastics; Plastics; Polyethylene; Sewage; Waste Disposal, Fluid; Waste Water |
| Data di presentazione: | 2021-04-07T16:45:08Z |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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