Evaluation of butachlor biodegradation efficacy of Serratia ureilytica strain AS1: a statistical optimization approach

  • S. S. Mohanty
  • H. M. JenaEmail author
Original Paper


Butachlor is a chloroacetanilide class of herbicide, commonly administered to control unwanted grasses and broad leaf weeds. Extensive usage of the herbicide has led to the contamination of water bodies and surrounding areas, resulting in an adverse impact on the environment. In the present work, a novel butachlor-catabolizing bacterium Serratia ureilytica strain AS-1 was isolated from an herbicide-contaminated soil. Statistical optimization techniques were used to optimize the butachlor biodegradation. Experimental parameters such as growth temperature, pH of the medium and biomass concentration were found to be significant for butachlor biodegradation. The results obtained indicates that the maximum degradation of 2.08 mg/L/h of butachlor was achieved under the optimal conditions of 32.5 °C of incubation temperature, pH 7.5 and 10% (v/v) inoculum size along with a polynomial mathematical model having R2 = 0.9833. The model was corroborated by carrying out experiments at the optimized conditions.


Biodegradation Butachlor Environmental pollution Response surface methodology Serratia 



The authors wish to thank all who assisted in conducting this work.

Compliance with ethical standards

Conflict of interest

The authors declare no conflict of interest regarding the subject of the manuscript.


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Copyright information

© Islamic Azad University (IAU) 2018

Authors and Affiliations

  1. 1.Department of Chemical EngineeringNational Institute of TechnologyRourkelaIndia

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