1 Ocak 2014 Dergi makalesi Açık Erişim

Herand, Binnur Kiratli; Simsek, Esra Karlik; Oncel, Mehmet Salim; Ozkan, Melek

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    <subfield code="a">In this study, four bacterial species isolated from an industrially polluted region at the Istanbul-Kocaeli border were characterized and their efficiencies for bioremoval of Cu2+, Ni2+, Cr3+, Zn2+, and Fe2+ were determined in batch and continuous systems. Strain N4c was used for continuous metal bioremoval in a packed-bed immobilized cell reactor (ICR) with a working volume of 180 ml. ICR was successfully operated for treatment of synthetic wastewater containing 200 mg/l Cu2+ and Ni2+ for 140 and 80 h, respectively. Bioremoval efficiency of ICR for Cu2+ reached around 90 % in the last 3 days of operation at a flow rate of 1 ml/min. Ni2+ bioremoval in ICR was less efficient as the system worked for only 80 h and bioremoval efficiency decreased from 73.3 to 42.8 % during the operation period. Wastewater containing one or two types of metal seems to be a good candidate for treatment with immobilized N4c cells in a continuous system. Survival of the cells in the wastewater was found to be an important parameter affecting bioremoval efficiency in both batch and continuous systems. The ICR used in this study can be scaled up for treatment of industrial wastewaters containing Ni2+ or Cu2+.</subfield>
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