Journal of Pure and Applied MicrobiologyVol. 9 No. 2

Remediation of Heavy Metals from Electroplating Effluent using Bacterial Strains in Up flow Immobilized Column Reactor

A.K. Priya1* and S. Nagan2

1Department of Civil Engg., KPR Institute of Engineering and Technology, Coimbatore - 641 407, Tamilnadu, India. 2Department of Civil Engg., Thiagarajar College of Engineering, Madurai - 625 015, Tamilnadu, India.

Received on 02 February 2015 and accepted on 11 March 2015

 

ABSTRACT

The contact of effluent containing heavy metals into the soil pose severe environmental and health hazard. Bioremediation of the contaminated soils has been widely attempted to remove heavy metal contaminants. This study was conducted to establish the efficiency of microorganisms present in heavy metal contaminated soil by bioremediation. Six bacterial strains and two exogenous bacterial strains were screened based on their capability to grow in nutrient agar media containing heavy metals. Slurry phase and immobilized column reactor were used to treat contaminated soil. Exogenous bacterial strain Bacillus sp. and pseudomonas sp. showed enhanced growth, which was chosen for further examination. The results revealed that the combination of Bacillus sp. and Pseudomonas sp. exhibits excellent efficiency of reducing heavy metals. The soil treatment results showed that, the up flow immobilized column reactor can reduce the heavy metal content appreciably within 24 hours. This evolves as an efficient strategy to replace the less ecofriendly physicochemical approaches and also provides a better insight into the field of bioremediation.

Keywords : Bioremediation, Bacillus sp., Pseudomonas sp., Heavy metal, Slurry phase reactor, Immobilized column reactor.