ORIGINAL RESEARCH
Induction Conditions and Kinetic Properties
of Quinoline Biodegradation by a Newly Isolated
Bacterial Strain
| 1 | Key Lab of Northwest Water Resources, Ecology and Environment, Ministry of Education,
Xi’an University of Architecture and Technology, Xi’an, China |
| 2 | School of Petroleum and Environmental Engineering, Yanan University, Yanan, China |
CORRESPONDING AUTHOR
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
Pol. J. Environ. Stud. 2020;29(2):1715–1724
KEYWORDS
TOPICS
ABSTRACT
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.
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