Denitrification and removal of heavy metals from waste water by immobilized microorganisms.
Pseudomonas fluorescens, immobilized on soft polyvinyl chloride granules containing up to 35% softeners as carbon source, was used for simultaneous removal of nitrate and heavy metals. In typical continuous column operation, a 100 mg/L nitrate input solution was reduced to a 20 mg/L output at a feeding rate of 1500 mL/h, with a capacity of 14 kg/day/m(3), and with an efficiency of 79%. In the same column, Pb(NO3)2 concentration was reduced from 1.0 to 0.05-0.1 mg/L and ZnSO4 concentration was reduced from 10 to 5 mg/L.Pseudomonas aeruginosa immobilized on an O2 plasma-treated melt blown polypropylene web was used for removing 95% of a 1.7 nCi PuCl4 activity from a nuclear plant waste water in a batch operation.
Department of Microbiology, Colorado State University, 80523, Fort Collins, Colorado.
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Tengerdy
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Johnson
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Holló
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Tóth