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An Integrated Chemical-Microbiological Approach for the Disposal of Waste thin Film Cadmium Telluride Photovoltaic Modules

Published online by Cambridge University Press:  10 February 2011

K. M. Paknikar ,
J.M. Rajwade ,
A. V. Pethkar ,
D. J. Goyal ,
P.G. Bilurkar  and
N. V. Mate
K. M. Paknikar
Affiliation:
Division of Microbial Sciences, MACS Agharkar Research Institute, G.G. Agarkar Road, Pune 411 004, India
J.M. Rajwade
Affiliation:
Division of Microbial Sciences, MACS Agharkar Research Institute, G.G. Agarkar Road, Pune 411 004, India
A. V. Pethkar
Affiliation:
Division of Microbial Sciences, MACS Agharkar Research Institute, G.G. Agarkar Road, Pune 411 004, India
D. J. Goyal
Affiliation:
EcoSolar Systems (India) Pvt. Ltd, 2035/2 Sadashiv Peth, Tilak Road, Pune 411 030, India.
P.G. Bilurkar
Affiliation:
EcoSolar Systems (India) Pvt. Ltd, 2035/2 Sadashiv Peth, Tilak Road, Pune 411 030, India.
N. V. Mate
Affiliation:
EcoSolar Systems (India) Pvt. Ltd, 2035/2 Sadashiv Peth, Tilak Road, Pune 411 030, India.
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Abstract

The paper describes a novel chemical-microbiological method for the selective removal of cadmium, tellurium and silver from the thin film CdTe photovoltaic modules. The chemical component of the process utilizes dissolution of metals with nitric acid. The metal solution is subjected to selective biosorption of silver and cadmium by passing through biosorbent columns. The adsorbed cadmium and silver are desorbed and recovered by chemical precipitation. Tellurium in solution coming out of the biosorbent columns is converted microbiologically to its metallic form in a bioreactor. The combined chemical-microbiological treatment ensures recovery of silver, cadmium and tellurium with 86%, 80% and 99% efficiency, respectively. The treated waste can be discharged safely in the environment.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 447: Symposium L – Environmental, Safety, and Health Issues in IC Pro…… , 1996 , 133
Copyright
Copyright © Materials Research Society 1997

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References

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