High rate production of concentrated sulfides from metal bearing wastewater in an expanded bed hydrogenotrophic sulfate reducing bioreactor.

ABSTRACT: Metallurgical wastewaters contain high concentrations of sulfate, up to 15 g L^-1. Sulfate-reducing bioreactors are employed to treat these wastewaters, reducing sulfates to sulfides which subsequently co-precipitate metals. Sulfate loading and reduction rates are typically restricted by the total H₂S concentration. Sulfide stripping, sulfide precipitation and dilution are the main strategies employed to minimize inhibition by H₂S, but can be adversely compromised by suboptimal sulfate reduction, clogging and additional energy costs. Here, metallurgical wastewater was treated for over 250 days using two hydrogenotrophic granular activated carbon expanded bed bioreactors without additional removal of sulfides. H₂S toxicity was minimized by operatin

SUBMITTER: Ostermeyer P 

PROVIDER: S-EPMC9488047 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature