Continuous flow fermentation to purify waste water by the removal of cadmium |
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Authors: | R Campbell M H Martin |
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Institution: | 1. Department of Botany, University of Bristol, BS8 1 UG, Bristol, U.K.
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Abstract: | Fungi have been isolated that can tolerate and absorb high levels of heavy metals, especially Cd, when grown in a continuous flow air-lift fermenter with up to 10 throughputs per day. This allows the recovery of metals or the purification of industrial effluent streams. An average of over 97% of the Cd was removed from the simulated effluent during passage through the fermenter, reducing the Cd concentration from over 6 mg L?1 to less than 0.2 mg L?1. The biomass recovered contained up to 2.9% Cd (on a dry weight basis) and can either be disposed of or returned for smelting to recover the metal. |
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