Simultaneous aerobic nitrogen and phosphate removal capability of novel salt-tolerant strain, Pseudomonas mendocina A4: Characterization, mechanism and application potential
文献类型： 外文期刊
作者： Shu, Hu 2 ; Ma, Yonghao 1 ; Lu, Huijie 1 ; Sun, Huiming 1 ; Zhao, Jichen 1 ; Ruan, Zhuohao 1 ; Zhou, Jiayi 2 ; Liu, Yuting 2 ; Liu, Fengkun 1 ; Xu, Jingxuan 1 ; Zheng, Yazhi 1 ; Guo, Hui 3 ; Chen, Qionghua 2 ; Huang, Wen 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Inst Anim Sci, Collaborat Innovat Ctr Aquat Sci, Guangdong Key Lab Anim Breeding & Nutr, Guangzhou 510640, Peoples R China
2.Guangzhou Univ, Sch Life Sci, Guangzhou 510006, Peoples R China
3.Guangdong Ocean Univ, Fishery Coll, Zhanjiang 524088, Peoples R China
4.Guangdong Acad Agr Sci, Inst Anim Sci, Guangzhou 510640, Peoples R China
关键词： Nitrogen metabolism; Aerobic phosphate removal; Metabolism enzymes; Immobilization
期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：11.4； 五年影响因子：10.6 ）
ISSN： 0960-8524
年卷期： 2024 年 393 卷
页码：
收录情况： SCI
摘要： A salt-tolerant strain, Pseudomonas mendocina A4, was isolated from brackish-water ponds showing simultaneous heterotrophic nitrification-aerobic denitrification and phosphorus removal capability. The optimal conditions for nitrogen and phosphate removal of strain A4 were pH 7-8, carbon/nitrogen ratio 10, phosphorus/nitrogen ratio 0.2, temperature 30 degrees C, and salinity range of 0-5 % using sodium succinate as the carbon source. The nitrogen and phosphate removal efficiencies were 96-100 % and 88-96 % within 24 h, respectively. The nitrogen and phosphate removal processes were matched with the modified Gompertz model, and the underlying mechanisms were confirmed by the activities of key metabolic enzymes. Under 10 % salinity, the immobilization technology was employed to enhance the nitrogen and phosphate removal efficiencies of strain A4, achieving 87 % and 76 %, respectively. These findings highlight the potential application of strain A4 in both freshwater and marine culture wastewater treatment.
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