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Bioprocess and Biosystems Engineering

, Volume 38, Issue 11, pp 2137–2146 | Cite as

Anaerobic removal of 1-methoxy-2-propanol under ambient temperature in an EGSB reactor

  • C. Lafita
  • J. M. Penya-roja
  • C. Gabaldón
Original Paper

Abstract

Two laboratory-scale expanded granular sludge bed (EGSB) reactors were operated at 18 and 25 °C, respectively, for the treatment of synthetic wastewater composed of ethanol and 1-methoxy-2-propanol (M2P) in a mass ratio of 4:1. Reactors were operated first with continuous wastewater supply and after with discontinuous substrate supply (5 days a week, 16 h a day) to simulate shift working conditions. Under continuous wastewater supply chemical oxygen demand (COD), removal efficiency higher than 95 % was achieved at the end of the trial applying organic loading rates (OLR) of 29 and 43 kg COD m−3 day−1 at 18 and 25 °C; thus, corresponding to M2P OLR of 6.4 and 9.3 kg COD m−3 day−1, respectively. During intermittent supply of substrate, good performance was recorded at both temperatures with an OLR of 30 kg COD m−3 day−1 (M2P OLR of 6.6 kg COD m−3 day−1). After 56 h without substrate supply, a decline in methane yield of 15–30 % was observed due to the deactivation of the biomass. Specific methanogenic activity (SMA) assays were carried out at the end of the experiments. SMA values using 1-methoxy-2-propanol as substrate were 24.3 and 7.8 ml CH4 gVSS−1 day−1 at 25 °C and at 18 °C, respectively. This is the first attempt to investigate the removal of 1-methoxy-2-propanol by EGSB reactors.

Keywords

1-Methoxy-2-propanol EGSB Packaging wastewater Ambient temperature 

Notes

Acknowledgments

This project has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under grant agreement No. 284949. Financial support from Ministerio de Economía y Competitividad (Project CTM2014-54517) and Generalitat Valenciana (PROMETEO/2013/053), Spain, is also acknowledged. C. Lafita has a FPI grant from Ministerio de Economía y Competitividad, Spain.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Research Group GI2AM, Department of Chemical EngineeringUniversity of ValenciaBurjassotSpain

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