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Start-Up of Chitosan-Assisted Anaerobic Sludge Bed Reactors Treating Light Oxygenated Solvents under Intermittent Operation

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Start-Up of Chitosan-Assisted Anaerobic Sludge Bed Reactors Treating Light Oxygenated Solvents under Intermittent Operation

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dc.contributor.author	Torres, K.
dc.contributor.author	Álvarez Hornos, Francisco Javier
dc.contributor.author	Gabaldón García, Carmen
dc.contributor.author	Marzal Doménech, Paula
dc.date.accessioned	2021-11-23T16:58:07Z
dc.date.available	2021-11-23T16:58:07Z
dc.date.issued	2021
dc.identifier.citation	Torres, K. Álvarez Hornos, Francisco Javier Gabaldón García, Carmen Marzal Doménech, Paula 2021 Start-Up of Chitosan-Assisted Anaerobic Sludge Bed Reactors Treating Light Oxygenated Solvents under Intermittent Operation International Journal Of Environmental Research And Public Health 18 4986
dc.identifier.uri	https://hdl.handle.net/10550/80797
dc.description.abstract	Quality of the granular sludge developed during the start-up of anaerobic up-flow sludge bed reactors is of crucial importance to ensure the process feasibility of treating industrial wastewater such as those containing solvents. In this study, the microbial granule formation from suspended-growth biomass was investigated in two chitosan-assisted reactors. These reactors operated mimicking industrial sites working with night closures treating a mixture of ethanol, ethyl acetate, and 1-ethoxy-2-propanol. Each reactor operated under different hydrodynamic regimes typical from UASB (R1: <0.15 m h−1) and EGSB (R2: 3 m h−1). High soluble COD removal efficiencies (>90%) accompanied by rapid formation of robust anaerobic granules were achieved at both up-flow velocity levels. After three weeks from the start-up, mean size diameters of 475 µm and 354 µm were achieved for R1 and R2, respectively. The performance of the process was found to be stable for the whole operational period of 106 days treating intermittent OLR up to 13 kg COD m−3 d−1. A memory dose of chitosan at day 42 was beneficial to guarantee good quality of the granules by offsetting the negative impact of intermittent water supply on the granular size. Methanocorpusculum was identified as the dominant archaea at both up-flow velocities. Acetobacterium, Geobacter and Desulfovibrio bacteria were also abundant, demonstrating its role on the degradation of light-oxygenated solvents.
dc.language.iso	eng
dc.relation.ispartof	International Journal Of Environmental Research And Public Health, 2021, vol. 18, p. 4986
dc.subject	Enginyeria ambiental
dc.subject	Aigües residuals
dc.subject	Innovacions tecnològiques
dc.title	Start-Up of Chitosan-Assisted Anaerobic Sludge Bed Reactors Treating Light Oxygenated Solvents under Intermittent Operation
dc.type	journal article	es_ES
dc.date.updated	2021-11-23T16:58:08Z
dc.identifier.doi	10.3390/ijerph18094986
dc.identifier.idgrec	149121
dc.rights.accessRights	open access	es_ES