ORIGINAL RESEARCH article
Front. Microbiol.
Sec. Microbiotechnology
Isolation and Identification of a High-Efficiency Oil-Degrading Klebsiella pneumoniae Strain from Kitchen Waste and Evaluation of Its Degradation Performance
Provisionally accepted
- 1Jilin Institute of Chemical Technology, Jilin, China
- 2Chongqing Medical and Pharmaceutical College, Chongqing, China
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In view of the excessive grease content in kitchen wastewater and the limited oil removal efficiency of conventional treatment systems, this study isolated a highly efficient oil-degrading bacterium (strain Y1) from soil beneath a kitchen waste pipeline and investigated its degradation performance. Through morphological observation, biochemical tests, and 16S rRNA gene sequencing, strain Y1 was identified as Klebsiella pneumoniae. The growth characteristics and oil degradation performance revealed the optimal degradation conditions to be 35 °C, pH 7.0, and 180 r/min. Under these conditions, the oil degradation rate reached 48.7%. In a simulated treatment of actual kitchen oil-rich wastewater, strain Y1 achieved the chemical oxygen demand (COD) removal rate of 62% in 48 h (reaching 62.8% at 66 h) and an oil degradation rate of 60.7% in 96 h (slightly increasing to 60.9% at 108 h). These results highlight the potential of strain Y1 for practical application in the bioremediation of oily wastewater. This study provides a new microbial resource and technical reference for the biological treatment of kitchen grease wastewater.
Keywords: Kitchen waste, Klebsiella pneumoniae, Oil degradation rate, Biotreatment, wastewater
Received: 25 Sep 2025; Accepted: 29 Nov 2025.
Copyright: © 2025 Ding, Xu, Zhang, Xie, Li and Huang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Wenqiao Ding
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