生物技术通报 ›› 2019, Vol. 35 ›› Issue (9): 202-209.doi: 10.13560/j.cnki.biotech.bull.1985.2019-0339

• 研究报告 • 上一篇    下一篇

一株高效好氧反硝化细菌的分离鉴定及脱氮性能研究

李文甫1, 杜柳冰1,2, 刘思莹1, 翁美遂1, 舒琥1, 陈琼华1   

  1. 1. 广州大学生命科学学院,广州 510006;
    2. 中山大学医学院,广州 510000
  • 收稿日期:2019-04-19 出版日期:2019-09-26 发布日期:2019-09-16
  • 作者简介:李文甫,男,研究方向:好氧反硝化菌;E-mail:190738593@qq.com
  • 基金资助:
    广东省海洋与渔业发展专项资金(2017A0003,2017A0007,A201701B10),广东省现代渔业发展专项资金(SDYY-2018-10),2018国家级大学生创新创业训练项目(201811078020)

Isolation and Identification of an Efficient Aerobic Denitrifying Bacterium

LI Wen-fu1, DU Liu-bing1,2, LIU Si-ying1, WENG Mei-sui1, SHU Hu1, CHEN Qiong-hua1   

  1. 1. School of Life Science,Guangzhou University,Guangzhou 510006;
    2. School of Medicine,Sun Yat-sen University, Guangzhou 510000
  • Received:2019-04-19 Published:2019-09-26 Online:2019-09-16

摘要: 从广州市西朗珠江水产研究所养殖池中分离新型好氧反硝化细菌,旨为开发新型生物脱氮工艺奠定基础。利用3种不同筛选培养基分离好氧反硝化细菌,测定在单一氮源培养基中发酵的生长曲线和脱氮性能,通过形态和16S rRNA基因序列分析对菌株进行鉴定并构建系统发育树。分离得到一株高性能好氧反硝化菌株BB-17,该菌株在单一氮源培养基中以28℃,180 r/min振荡培养时,其对数期出现在6-24 h,氨氮去除率在18 h达93.92%,硝态氮去除率在48 h达66.11%,亚硝态氮去除率在48 h达99.10%。BB-17为革兰氏阴性短杆菌,16S rDNA序列分析结果与Pseudomonas vancouverensis(AJ011507)比对具有98.41%同源性,确定BB-17为假单胞菌属并命名为Pseudomonas sp. BB17。

关键词: 分离, 异养硝化, 好氧反硝化, 假单胞菌

Abstract: New types of aerobic denitrifying bacteria were isolated from the culture pond of the Xilang Pearl River Aquaculture Institute in Guangzhou,aiming at laying the foundation for the development of a new biological nitrogen removal process. Three different screening media were used to isolate the aerobic denitrifying bacteria,and the growth curve and denitrification performance of fermentation in a sole nitrogen source medium were determined. Then morphology and 16S rRNA gene sequence analysis were employed to identify the strains and a phylogenetic tree was constructed. As result,a high-performance aerobic denitrifying strain BB-17 was isolated. When the strain was cultured at 28℃,180 r/min in a sole nitrogen source medium,the logarithmic phase appeared at 6-24 h and the removal rate of ammonia nitrogen was up to 93.92% at 18 h,that of nitrate nitrogen reached 66.11% at 48 h,and that of nitrite nitrogen reached 99.10% at 48 h. BB-17 was a Gram-negative Brevibacterium,the results of 16S rDNA sequence analysis presented 98.41% homology with Pseudomonas vancouverensis(AJ011507),and BB-17 was identified as Pseudomonas and named P. sp. BB17.

Key words: isolation, heterotrophic nitrification, aerobic denitrification, Pseudomonas