Sequestration of Zn2+ from aqueous solution using Klebsiella pneumoniae: Batch kinetics and continuous studies

Abstract

The present study was aimed to isolate, Klebsiella pneumoniae from activated sludge. It was used to remove Zn2+ from aqueous solution in batch and continuous modes. Batch study was conducted for 20–200mgL−1 of initial Zn2+ concentration to determine the optimum value of initial Zn2+ concentration. Batch bioremediation studies were also performed to determine the optimum values of solution pH, minimal salt medium (MSM) dosage, macronutrients amount, aerobic & facultative anaerobic conditions, temperature and inoculum volume. The optimum solution pH for the growth of K. pneumoniae was found as 7 for the Zn2+ bioremediation. The growth of K. pneumoniae was found optimum in aerobic condition and in the temperature range of 37–40°C.