Work

Isolation and identification of a high-efficiency oil-degrading Klebsiella pneumoniae strain from kitchen waste and evaluation of its degradation performance

Year: 2026

Type: article

Abstract: 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.

Source: Frontiers in Microbiology

DOI: 10.3389/fmicb.2025.1712081

Authors: Wenqiao Ding, Chongli Xu, Mengyi Zhang, Ying Xie, Fei Li, Qiuting Huang

Institutions: Jilin University of Chemical Technology, Chongqing Medical and Pharmaceutical College

Language: English

Topic: Microbial bioremediation and biosurfactants

Subfield: Pollution

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production

Open Access status: gold

Estimated APC paid: $3,801