The Co-Metabolic Biodegradation Kinetic Models of a Chlorinated Alkene with Mutagenicity, Carcinogenicity and Teratogenicity by Two Strains of Aerobic Bacteria

Abstract:

Purpose 1,1-DCE is a environmental pollutant of mutagenicity, carcinogenicity and teratogenicity. This paper studied the biodegradation of 1,1-DCE by two strains of aerobic bacteria which use benzene as co-metabolic substrate. Procedures First the two strains were activated, then through batch experiments, the residual concentrations of 1,1-DCE were monitored. Methods The biodegradation rates were determined, and the varying trends of the biodegradation rates with the initial concentrations were fitted by some kinetic models. Results The biodegradation kinetics of 1,1-DCE by the strain DB–I fits Monod Model, the corresponding parameters are ν_max=0.015h^-1, K_s＝10.18 mg·L^-1, while the biodegradation kinetics by strain DB-M fits Haldane Model, and the parameters respectively are ν_max =0.0063h^-1, K_s =4.55mg·L^-1，K_i=13.09mg·L^-1. Conclusion The specific substrate removal rate constant of 1,1-DCE by strain DB–I is higher than that of strain DB–M, and they are both higher than those of the studies performed by other authors.

• Periodical: Applied Mechanics and Materials (Volumes 138-139)
• Pages: 1040-1049
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.138-139.1040
• Online since: November 2011
• Authors: Hai Tao Shang, Qi Yang, Yang Zhang
• Keywords: 1,1-DCE Aerobic Strains Co-Metabolism Kinetics, Mutagenicity-Carcinogenicity-Teratogenicity

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