Sustained Perchlorate Degradation in an Autotrophic, Gas-Phase, Packed-Bed Bioreactor

Topics:
Chemical
Tags:
American Chemical Society,
Degradation,
Hydrogen
Source:
American Chemical Society

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Overview: The paper reveals about an autotrophic packed-bed biofilm reactor that was operated in unsaturated-flow mode and continuously fed water containing perchlorate (ClO4) (as an electron acceptor) and a gas mixture of hydrogen (5%) and carbon dioxide. The reactor was inoculated with a perchlorate-reducing, hydrogen-oxidizing autotrophic bacterial consortium and run for 10 days at a perchlorate feed concentration of 50 mg/L to build up biofilm on the reactor packing. The reactor feed was then switched to a lower influent perchlorate respectively. The high perchlorate degradation rates and long term performance of this system demonstrate the feasibility of this novel unsaturated hydrogen gas-phase fixed-film bioreactor for treatment of perchlorate-contaminated water.

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Format: PDF | Size: 139KB | Date: Jun 2000 | Pages: 5

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