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Bacterial diversity of lactate- and ethanol-utilizing sulfate-reducing fluidized-bed reactor (FBR) communities was investigated with culture-independent methods. The FBRs were fed for 500 days with synthetic mineral processing wastewater containing sulfate, zinc and iron with hydraulic retention time of 16-24 h. Sodium lactate or ethanol was used as electron donor for microbial sulfate reduction....
The treatment of simulated acidic wastewater (pH 2.5–5)containing sulfate (1.0–2.2 g l-1), zinc (15–340 mg l -1) and iron (57 mg l -1) was studied in a sulfate-reducing fluidized-bed reactor (FBR) at 35 °C.The original lactate feed for enrichment and maintenance of the FBRculture was replaced stepwise with ethanol over 50 days. The robustnessof the process was studied by increasing stepwise the Zn,...
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