Induction Conditions and Kinetic Properties of Quinoline Biodegradation by a Newly Isolated Bacterial Strain
Yu Liu 1,2
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Key Lab of Northwest Water Resources, Ecology and Environment, Ministry of Education, Xi’an University of Architecture and Technology, Xi’an, China
School of Petroleum and Environmental Engineering, Yanan University, Yanan, China
Submission date: 2018-06-27
Final revision date: 2019-04-02
Acceptance date: 2019-04-22
Online publication date: 2019-12-16
Publication date: 2020-02-13
Corresponding author
Yongjun Liu   

Xi’an University of Architecture and Technology, China
Pol. J. Environ. Stud. 2020;29(2):1715–1724
In order to strengthen the removal efficiency of heterocyclic nitrogenous compounds in industrial wastewater, a new bacterial strain identified as Bacillus sp. LH-1 was isolated, which could use quinoline as its sole carbon, nitrogen and energy source. The inducing conditions and kinetic properties of quinoline biodegradation by the strain were explored. The results showed that the strain Bacillus sp. LH-1 exhibited maximum tolerance of 700 mgL-1quinoline concentration. After the strain was activated under the conditions of 200 mgL-1 quinoline for 120 h, the quinoline degradation was triggered, and the quinoline degradation rate increased approximately 10 times, from 2.030mg (L•h)-1 to 21.508 mg (L•h)-1. When the initial concentration of quinoline was 300 mgL-1, more than 97% quinoline degradation occured within 12 h at pH 7 and at a temperature of 37ºC. The degradation kinetics of quinoline by strain Bacillus sp. LH-1 followed Haldane’s model and indicated that the strain isolated in this study could be used for degradation of heterocyclic nitrogenous compounds in industrial wastewater.