The aim of this work was to analyse the applicability of electrical conductivity sensors for on-line monitoring the start-up period of an anaerobic fixed-bed reactor. The evolution of bicarbonate concentration and methane production rate was analysed. Strong linear relationships between electrical conductivity and both bicarbonate concentration and methane production rate were observed. On-line estimations of the studied parameters were carried out in a new start-up period by applying simple linear regression models, which resulted in a good concordance between both observed and predicted values. Electrical conductivity sensors were therefore identified as an interesting method for monitoring the start-up period of anaerobic fixed-bed reactors due to its reliability, robustness, easy operation, low cost, and minimum maintenance compared with the currently used sensors.
Electrical conductivity as a state indicator for the start-up period of anaerobic fixed-bed reactors
A. Robles, E. Latrille, J. Ribes, N. Bernet, J. P. Steyer; Electrical conductivity as a state indicator for the start-up period of anaerobic fixed-bed reactors. Water Sci Technol 5 May 2016; 73 (9): 2294–2300. doi: https://doi.org/10.2166/wst.2016.031
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