Treatment of chromate-polluted groundwater in a 200 dm3 pilot bioreactor fed with hydrogen - BRGM - Bureau de recherches géologiques et minières Access content directly
Journal Articles Journal of Chemical Technology and Biotechnology Year : 2006

Treatment of chromate-polluted groundwater in a 200 dm3 pilot bioreactor fed with hydrogen

Abstract

Chromate is a highly soluble, toxic and carcinogenic oxyanion commonly found in groundwaters and soils. A 200 dm3 pilot bioreactor was designed to treat typical Cr(VI)-polluted groundwater. A fixed bed column was filled with pozzolana, inoculated with a bacterial population containing the sulfate-reducing organism Desulfomicrobium norvegicum and fed with an H2 + CO2 gas mixture. The pilot was operated under continuous feed conditions for 3 months, first with a synthetic solution and then with real polluted groundwater containing 15 mg dm−3 Cr(VI). The residence time was decreased to 7 h, while the Cr(VI) concentration in the outflow remained lower than 0.2 mg dm−3. The bacterial population did not need any organic carbon supply thanks to acetogenesis. The highest Cr(VI) reduction rate was 2.2 mg dm−3 h−1. The CO2 flow rate was regulated in order to maintain the pH in the interval 7.5–8.5. The CO2 consumption rate increased with feed flow rate and sulfate reduction activity. The process worked satisfactorily between 10 and 35 °C

Domains

Earth Sciences

Dates and versions

hal-03752269 , version 1 (16-08-2022)

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Cite

Fabienne Battaglia-Brunet, Solène Touzé, Caroline Michel, Ioannis Ignatiadis. Treatment of chromate-polluted groundwater in a 200 dm3 pilot bioreactor fed with hydrogen. Journal of Chemical Technology and Biotechnology, 2006, 81 (9), pp.1506-1513. ⟨10.1002/jctb.1551⟩. ⟨hal-03752269⟩

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