6533b856fe1ef96bd12b1e3b

RESEARCH PRODUCT

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

Carlos LafitaCarlos LafitaHenri SpanjersJulian D. Muñoz SierraJules B. Van LierCarmen Gabaldón

subject

Environmental EngineeringSodium0208 environmental biotechnologyBiomasschemistry.chemical_elementBioengineering02 engineering and technologyWastewater010501 environmental sciencesWaste Disposal Fluid01 natural sciencesBacteria AnaerobicBioreactorsBioreactorAnaerobiosisWaste Management and DisposalAnaerobic Membrane Bioreactor0105 earth and related environmental sciencesChromatographyPhenolRenewable Energy Sustainability and the EnvironmentMethanogenic activitySodiumTrace metals partitioningGeneral Medicine6. Clean water020801 environmental engineeringBioavailabilityMembranechemistryWastewaterMetalsMethaneAnaerobic exerciseCobaltNuclear chemistry

description

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.

yearjournalcountryeditionlanguage
2017-06-01Bioresource Technology
https://doi.org/10.1016/j.biortech.2017.03.032