化学吸收-生物还原法处理烟气中氮氧化物

生物工程论文编号:SW123  论文字数:10400,页数:25

目录
中文摘要 Ⅰ
英文摘要 Ⅱ
目录  Ⅲ
1. 绪论 1
 1.1 现状 1
 1.2 脱氮方法 1
 1.3 化学吸收－生物还原法（络合吸收-生物还原） 2
 1.4 亚铁络合吸收剂脱除NO研究概况 2
 1.5 柠檬酸亚铁络合吸收剂研究概况 3
2.实验部分 4
 2.1 Fe(II)Cit吸收液的NO吸收特性的考察 4
 2.2 Fe(III)Cit与Fe(II)Cit-NO的微生物还原实验 6
 2.3分析测试方法 8
3.结果和讨论 11
 3.1 Fe(II)Cit溶液对NO吸收容量的实验研究 11
 3.2 恒温摇床中微生物还原Fe(II)Cit的实验研究 12
4.总结与展望 17
致谢  18
参考文献  19

摘  要

 本文针对现有的烟气脱硝技术的缺点和局限性，采用化学吸收-生物还原法来脱除烟气中的氮氧化物，研究了Fe(II)Cit对NO的吸收容量实验和菌种Enterococcus sp. FR-3的一些生长及还原特性。实验结果表明：最佳Fe(II)与Cit摩尔配比率应为Fe：Cit=1：2，在此配比下具有最高的NO吸收容量。FR-3能够有效地还原Fe(III)Cit，而当吸收液内存在一定量NO2-或SO32-时对菌种生长和Fe(III)Cit还原造成一定程度的抑制，以SO32-的抑制作用最为明显。实验考察浓度范围内，SO42-对菌种生长和Fe(III)Cit还原无抑制。

关键词：烟气脱硝；NO；FR-3；化学吸收-生物还原

Chemical absorption-microbial reduction for the removal of NOx from flue gas

Abstract
 In view of shortcoming and limitation of the existing haze denitrate technology, this artical proposed a chemical absorption-biological reduction integrated process to remove the nitrogen oxide in flu gas，to learn the absorption capacity of NO to Fe(II)Cit, and the influence factors of growth and reducing character of Enterococcus sp. FR-3. This study showed that the best  allocation ratio between Fe(II)Cit  and NO was 1:2, which got the best absorption capacity. Strain FR-3 could reduce Fe(III)Cit efficiently, but the inhibiton phenomenon existed when there was a certain amount of NO2- or SO32- in the absorption solution, especially when there esisted SO32-. SO42- had no inhibiton on strain FR-3.
 
Keywords: flue gas denitrification；NO；FR-3；chemical absorption-biological reduction