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

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

Muñoz Sierra, Julian (TU Delft Sanitary Engineering)
Lafita Lopez, C. (TU Delft Sanitary Engineering; Universidad de Valencia (ICMol))
Gabaldón, Carmen (Universidad de Valencia (ICMol))
Spanjers, H. (TU Delft Sanitary Engineering)
van Lier, J.B. (TU Delft Sanitary Engineering)

2017-06-01

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.

Anaerobic Membrane Bioreactor
Methanogenic activity
Phenol
Sodium
Trace metals partitioning

http://resolver.tudelft.nl/uuid:3f348349-2b63-42cf-9d22-f50c5c23f0d4

https://doi.org/10.1016/j.biortech.2017.03.032

0960-8524

Bioresource Technology, 234, 106-114

Institutional Repository

journal article

© 2017 Julian Muñoz Sierra, C. Lafita Lopez, Carmen Gabaldón, H. Spanjers, J.B. van Lier