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dc.contributor.authorWakjera, Eshetu Janka
dc.contributor.authorCarvajal Rodriguez, Diego Armando
dc.contributor.authorWang, Shuai
dc.contributor.authorBakke, Rune
dc.contributor.authorSaldias Dinamarca, Carlos Antonio
dc.identifier.citationJanka, E., Carvajal, D., Wang, S., Bakke, R., & Dinamarca, C. (2019). Treatment of Metformin-Containing Wastewater by a Hybrid Vertical Anaerobic Biofilm-Reactor (HyVAB). International Journal of Environmental Research and Public Health 16(21), 4125.en_US
dc.description.abstractSeveral series of batch and continuous experiments were performed to investigate the removal of metformin and other contaminants from two wastewaters: wastewater I (WWI) containing 4 mg/L metformin and wastewater II (WWII) containing 110 g/L butanol. Biomethane potential (BMP) tests on WWII showed 77% of total chemical oxygen demand (tCOD = 110 g/L) degradability, and no apparent inhibition effects were observed. BMP tests on WWI showed an apparent inhibitory effect reflected in lower biogas production with increasing metformin concentration in the wastewater. Continuous flow hybrid vertical anaerobic biofilm (HyVAB®) experiments were consistent with the batch test findings. It was necessary to co-digest WWI (metformin) with WWII (easily degradable organics) to achieve complete metformin removal. After a period of adaptation, WWI and WWII co-digestion achieved up to 98% tCOD removal and 100% metformin removal. Most of the contaminants were removed in the anaerobic section of the HyVAB®, which implies that higher chemical oxygen demand (COD) loads than tested here are possible, given some optimization. The pilot reactor was able to manage organic loads of 11 g COD/d and above 10 mg/L metformin with a removal of 98% and 100% for tCOD and metformin, respectivelyen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleTreatment of Metformin-Containing Wastewater by a Hybrid Vertical Anaerobic Biofilm-Reactor (HyVAB)en_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.rights.holder© 2019 by the authorsen_US
dc.source.journalInternational Journal of Environmental Research and Public Healthen_US

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal