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- W2000564251 abstract "Two years of BIOX pilot plant data have been examined for steady state conditions and then correlated using logistic kinetics. It was found that the logistic equation not only predicted the performance of individual stages but also the degree of biooxidation across the entire cascade of bioreactors. It was found that the rate constant was 1.3 day−1 in the first three stages and 0.3 day−1 in the fourth stage. The maximum removal constant was 0.90 in stage 1 and 0.99 in the remaining stages. Plant retention time ranged from 4 to 12 days with corresponding sulphide oxidation varying from 82 to 98% respectively, and primary stage removal rates varying from 8.9 to 4.4 kg m−3 day−1, respectively. In addition, batch biooxidation data were obtained. The biooxidation rate was found to be about half that for the continuous bioreactors. This is in agreement with the findings of several other workers. The specific rates of bioxidation of pyrite and arsenopyrite were very similar for the bulk concentrate at about 0.15 day−1. However, it was significant that the biooxidation of arsenopyrite in the mixed mineral preceded that of pyrite, suggesting a sequential mechanism. Gold liberation was found to be linearly related to arsenopyrite biooxidation but oxidation of pyrite appears to be preferential in the gold-rich regions." @default.
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- W2000564251 date "1993-07-01" @default.
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- W2000564251 title "Biooxidation of a gold-bearing pyrite-arsenopyrite concentrate" @default.
- W2000564251 cites W2140065205 @default.
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- W2000564251 doi "https://doi.org/10.1111/j.1574-6976.1993.tb00282.x" @default.
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