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Trace metals supplementation in anaerobic membrane bioreactors treating highly saline phenolic wastewater

Journal Article (2017)
Author(s)

JD Muñoz Sierra (TU Delft - Sanitary Engineering)

C. Lafita Lopez (TU Delft - Sanitary Engineering, Universidad de Valencia (ICMol))

Carmen Gabaldón (Universidad de Valencia (ICMol))

H Spanjers (TU Delft - Sanitary Engineering)

J.B. Van Lier (TU Delft - Sanitary Engineering)

Research Group
Sanitary Engineering
Copyright
© 2017 Julian Muñoz Sierra, C. Lafita Lopez, Carmen Gabaldón, H. Spanjers, J.B. van Lier
DOI related publication
https://doi.org/10.1016/j.biortech.2017.03.032
More Info
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Publication Year
2017
Language
English
Copyright
© 2017 Julian Muñoz Sierra, C. Lafita Lopez, Carmen Gabaldón, H. Spanjers, J.B. van Lier
Research Group
Sanitary Engineering
Volume number
234
Pages (from-to)
106-114
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Abstract

Biomass requires trace metals (TM) for maintaining its growth and activity. This study aimed to determine the effect of TM supplementation and partitioning on the specific methanogenic activity (SMA), with a focus on cobalt and tungsten, during the start-up of two lab-scale Anaerobic Membrane Bioreactors (AnMBRs) treating saline phenolic wastewater. The TM partitioning revealed a strong accumulation of sodium in the biomass matrix and a wash-out of the majority of TM in the reactors, which led to an SMA decrease and a low COD removal of about 30%. The SMA exhibits a maximum at about 6 g Na+ L−1 and nearly complete inhibition at 34 g Na+ L−1. The dose of 0.5 mg L−1 of tungsten increases the SMA by 17%, but no improvement was observed with the addition of cobalt. The results suggested that TM were not bioavailable at high salinity. Accordingly, an increased COD removal was achieved by doubling the supply of TM.