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2021-01-01

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cc-by-nc-nd (c) Elsevier B.V., 2021
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/187942

Anaerobic membrane bioreactor performance at different wastewater pre-concentration factors: An experimental and economic study

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Recurs relacionat

https://doi.org/10.1016/j.scitotenv.2020.141625

Resum

This research evaluated the performance of a lab-scale anaerobic membrane bioreactor (AnMBR) treating municipal sewage pre-concentrated by forward osmosis (FO). The organic loading rate (OLR) and sodium concentrations of the synthetic sewage stepwise increased from 0.3 to 2.0 g COD L-1 d-1 and from 0.28 to 2.30 g Na+ L-1 to simulate pre-concentration factors of 1, 2, 5 and 10. No major operational problems were observed during AnMBR operation, with COD removal efficiencies ranging between 90 and 96%. The methane yield progressively increased from 214 ± 79 to 322 ± 60 mL CH4 g-1 COD as the pre-concentration factor increased from 1 to 10. This was mainly attributed to the lower fraction of methane dissolved lost in the permeate at higher OLRs. Interestingly, at the highest pre-concentration factor (2.30 g Na+ L-1) the difference between the permeate and the digester soluble COD indicated that membrane biofilm also played a role in COD removal. Finally, a preliminary energy and economic analysis showed that, at a pre-concentration factor of 10, the AnMBR temperature could be increased 10 °C and achieve a positive net present value (NPV) of 4 M¿ for a newly constructed AnMBR treating 10,000 m3 d-1 of pre-concentrated sewage with an AnMBR lifetime of 20 years.

Matèries

Bioreactors, Aigües residuals

Matèries (anglès)

Bioreactors, Sewage

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Articles publicats en revistes (Enginyeria Química i Química Analítica)

Citació

VINARDELL CRUAÑAS, Sergi, et al. Anaerobic membrane bioreactor performance at different wastewater pre-concentration factors: An experimental and economic study. Science of the Total Environment. 2021. Vol. 750, num. 141625. ISSN 0048-9697. [consulted: 14 of August of 2026]. Available at: https://hdl.handle.net/2445/187942

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