Abstract


Volume 6, Issue 4, August Issue - 2018, Pages:690-700


Authors: Saghee Madhu Raju, Rajkumar Bidlan
Abstract: Organochlorine pesticides (OCPs) such as 1,1,1-trichloro-2,2-bis(4-chlorophenyl) ethane (p,p’-DDT) and ?-hexachlorocyclohexane (Lindane) pose serious health effects to the environment and community. Although both these compounds are prohibited in many parts of the world, their residues were detected in various soil, air and aquatic ecosystems. Currently, research has been carried out on a single pesticide with a single microbe or a consortium with few members for biodegradation of organochlorine pesticides. In the environment, the scenario is different with many other compounds and native flora present that can make the application of single microbe or small consortium difficult to succeed. The current study was initiated to develop a microbial consortium that can act simultaneously degrade and eliminate more than one organochlorine compounds while maintaining its integrity in the environment. In this study, the simultaneous degradation of DDT and Lindane at 10 ppm, 20 ppm and 30 ppm concentration was studied at 0, 24, 42, 78 and 92 hours at optimized conditions (pH-7 and OD600 0.075). The enriched consortium could simultaneously degrade 90% of 10 PPM of DDT and Lindane.The enriched consortium was tested for degrading mixture of organochlorine pesticides with concentrations up to 30 ppm of DDT and Lindane mixture, and demonstrated promising observations that illustrate the usage of the consortium for degrading the OCPS with high efficiency.
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