化工进展 ›› 2016, Vol. 35 ›› Issue (05): 1524-1528.DOI: 10.16085/j.issn.1000-6613.2016.05.039

• 资源与环境化工 • 上一篇    下一篇

炼油废水中好氧反硝化菌的筛选及降解特性

武文丽, 颜家保, 陈佩, 霍晓琼, 吴优, 胡茜茜   

  1. 武汉科技大学化学工程与技术学院, 湖北 武汉 430081
  • 收稿日期:2015-09-17 修回日期:2015-10-29 出版日期:2016-05-05 发布日期:2016-05-05
  • 通讯作者: 颜家保,教授,博士生导师。E-mail 121135637@qq.com。
  • 作者简介:武文丽(1990-),女,硕士研究生。
  • 基金资助:
    武汉科技大学研究生创新创业基金重点项目(JCX0006)及武汉科技大学国家级大学生创新创业训练计划项目(201310488009)。

Screening of an aerobic denitrifier from refinery wastewater and its characteristics

WU Wenli, YAN Jiabao, CHEN Pei, HUO Xiaoqiong, WU You, HU Qianqian   

  1. College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
  • Received:2015-09-17 Revised:2015-10-29 Online:2016-05-05 Published:2016-05-05

摘要: 为了提高炼油废水生物处理装置的反硝化性能,从武汉石化污水处理厂的活性污泥中筛选出一株好氧反硝化菌AD10,经生理生化及16SrDNA序列分析,将其鉴定为假单胞菌属。通过单因素实验研究了该菌的最适培养条件:以丁二酸钠为碳源,C/N=14,温度30℃,初始pH=6.0,摇床转速200r/min。在此条件下,ρ(NO3--N)=556.81mg/L时72h的去除率为97.2%,且耐受的硝酸盐氮质量浓度达到654.00mg/L。菌株AD10培养11.5h,对ρ(NO3--N)=140.31mg/L和ρ(TN)=141.62mg/L的去除率分别为95.8%和93.9%,其反硝化速率高于大部分已发现的好氧反硝化菌,检测到的ρ(NO2-N)≤2.30mg/L,未出现明显的积累,菌株AD10能够进行完全反硝化。

关键词: 炼油废水, 假单胞杆菌, 好氧反硝化, 硝酸盐氮, 总氮

Abstract: In order to improve the denitrification efficiency of the bioreactor of refinery wastewater treatment plant, an aerobic denitrifier AD10 was isolated from the activated sludge of a petrochemical wastewater treatment plant in wuhan city. It was identified as a member of the genus Pseudomonas sp. according to its morphyological and physiological properties and 16S rDNA gene sequence analysis. Through the single factor experiment investigations, the optimum denitrification conditions were: sodium succinate as carbon source, C/N 14, temperature 30℃, initial pH 6.0, rotation speed 200 r/min. Under these conditions, the nitrate remove efficiency of AD10 was 97.2% when it was cultivated in 556.81 mg/L nitrate for 72h, and it could tolerate at least 654 mg/L of nitrate nitrogen. Culturing after 11.5h, AD10 show the NO3-N and TN removal rate of 95.8% and 93.9%, when the concentration of NO3--N and TN were 140.31mg/L and 141.62mg/L, respectively. AD10's denitrification rate is higher than most of the aerobic denitrifying bacteria have been found. During this process, only a very small amount of NO2-N (≤2.30mg/L) was detected, indicating a complete denitrification.

Key words: refinery wastewater, Pseudomonas sp., aerobic denitrification, nitrate nitrogen, total nitrogen

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