Key Laboratory of Pollution Treatment and Resource, China National Light Industry, Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Zhengzhou, Henan, China.
Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, China.
Cell Biochem Funct. 2024 Mar;42(2):e3965. doi: 10.1002/cbf.3965.
A highly efficient chlorobenzene-degrading strain was isolated from the sludge of a sewage treatment plant associated with a pharmaceutical company. The strain exhibited a similarity of over 99.9% with multiple strains of Paenarthrobacter ureafaciens. Therefore, the strain was suggested to be P. ureafaciens LY. This novel strain exhibited a broad spectrum of pollutant degradation capabilities, effectively degrading chlorobenzene and other organic pollutants, such as 1, 2, 4-trichlorobenzene, phenol, and xylene. Moreover, P. ureafaciens LY co-metabolized mixtures of chlorobenzene with 1, 2, 4-trichlorobenzene or phenol. Evaluation of its degradation efficiency showed that it achieved an impressive degradation rate of 94.78% for chlorobenzene within 8 h. The Haldane-Andrews model was used to describe the growth of P. ureafaciens LY under specific pollutants and its concentrations, revealing a maximum specific growth rate (μ ) of 0.33 h . The isolation and characterization of P. ureafaciens LY, along with its ability to degrade chlorobenzene, provides valuable insights for the development of efficient and eco-friendly approaches to mitigate chlorobenzene contamination. Additionally, investigation of the degradation performance of the strain in the presence of other pollutants offers important information for understanding the complexities of co-metabolism in mixed-pollutant environments.
从一家制药公司相关污水处理厂的污泥中分离到一株高效氯苯降解菌。该菌株与多种节杆菌属（Paenarthrobacter）的尿囊素酶假丝酵母（Ureafaciens）相似性超过 99.9%。因此，建议该菌株为尿囊素酶假丝酵母（P. ureafaciens）LY。该新型菌株表现出广谱的污染物降解能力，有效降解氯苯和其他有机污染物，如 1,2,4-三氯苯、苯酚和二甲苯。此外，尿囊素酶假丝酵母（P. ureafaciens）LY 共代谢氯苯与 1,2,4-三氯苯或苯酚的混合物。对其降解效率的评估表明，它在 8 小时内对氯苯的降解率达到了 94.78%。使用 Haldane-Andrews 模型来描述 P. ureafaciens LY 在特定污染物及其浓度下的生长情况，揭示了其最大比生长速率（μ）为 0.33 h。对尿囊素酶假丝酵母（P. ureafaciens）LY 的分离和特性研究，以及其对氯苯的降解能力，为开发高效、环保的方法来减轻氯苯污染提供了有价值的信息。此外，研究该菌株在存在其他污染物时的降解性能，为了解混合污染物环境中共代谢的复杂性提供了重要信息。
