西南石油大学学报(自然科学版)

• 油气化学工程 • 上一篇    下一篇

柴油脱硫菌的筛选及发酵条件研究

唐克,洪新   

  1. 辽宁工业大学化学与环境工程学院,辽宁锦州121001
  • 出版日期:2013-06-01 发布日期:2013-06-01
  • 作者简介:唐克,1974 年生,男,汉族,辽宁 铁岭人,教授,博士,主要从事清 洁燃料生产方面的研究。E-mail: tangke0001@163.com 洪新,1975 年生,女,满族,辽宁 北镇人,副教授,硕士,主要从事固 体废弃物资源化的研究。E-mail: hongxin12@sohu.com
  • 基金资助:

    辽宁省教育厅“高校杰出青年学者成长计划”(LJQ2012057)。

Study on the Selection and Fermentative Condition of Bacterium about
Diesel Desulfuration

Tang ke, Hong Xin   

  1. School of Chemical and Environmental Engineering,Liaoning University of Technology,Jinzhou,Liaoning 121001,China
  • Online:2013-06-01 Published:2013-06-01

摘要:

首先以二甲基亚砜为唯一硫源,通过初筛,筛选出28 株菌株,再以二苯并噻吩(DBT)为唯一硫源复筛,筛选
出降解DBT 较好的菌株HT1。菌株液体发酵实验表明,菌株HT1 生长的最适pH 值为6.57.5,最佳温度30 ℃;酸性
和碱性条件均对菌株的生长有抑制作用,二苯并噻吩降解能力降低;以葡萄糖作为碳源菌株生长最好,但存在底物抑
制作用,以甘油作为碳源时,菌株生长及DBT 降解能力略低,但不存在底物抑制作用;菌株HT1 既能利用有机氮源也
能利用无机氮源,但利用有机氮源的能力远远大于无机氮源,对DBT 的降解能力却正好相反,其中以硝酸铵作为氮源
时,对DBT 降解能力最大。最终确定甘油为最佳碳源,浓度为5 g/L,硝酸铵为生长氮源,最佳浓度为2 g/L。

关键词: 二苯并噻吩, 柴油, 脱硫, 菌株, 发酵

Abstract:

First,28 strains were selected by using dimethyl sulfoxide as the sole sulfur source,then HT1 strain was selected
which has high desulfurization ability by using dibenzonthiophene dibenzothiophene(DBT)as the sole source of sulfur. Strain
liquid fermentation of the HT1 reveals that the optimum pH and temperature for its growth is 6.57.5 and 30 ℃,respectively.
The HT1 strain could be inhibited under acid or alkaline condition and the ability of DBT degradation decreases. The growth
of the strain prospered with glucose as carbon source,but the substrate could inhibit its growth. The HT1 strain growth and
its DBT degradation ability were slightly lower with glycerol as carbon source and the substrate cannot inhibit its growth. The
HT1 strain can better utilize organic nitrogen sources than inorganic ones;however,it has the best DBT degradation effect with
ammonium nitrate as nitrogen source. Therefore,we come to the conclusion that the best carbon source is 5 g/L glycerol and
the best nitrogen source is 2 g/L ammonium nitrate.

Key words: DBT, diesel, desulfurization, strains, fermentation