化學吸收-生物還原法處理煙氣中氮氧化物

生物工程論文編號:SW123  論文字數:10400,頁數:25

目錄
中文摘要 Ⅰ
英文摘要 Ⅱ
目錄  Ⅲ
1. 緒論 1
 1.1 現狀 1
 1.2 脫氮方法 1
 1.3 化學吸收－生物還原法（絡合吸收-生物還原） 2
 1.4 亞鐵絡合吸收劑脫除NO研究概況 2
 1.5 檸檬酸亞鐵絡合吸收劑研究概況 3
2.實驗部分 4
 2.1 Fe(II)Cit吸收液的NO吸收特性的考察 4
 2.2 Fe(III)Cit與Fe(II)Cit-NO的微生物還原實驗 6
 2.3分析測試方法 8
3.結果和討論 11
 3.1 Fe(II)Cit溶液對NO吸收容量的實驗研究 11
 3.2 恒溫搖床中微生物還原Fe(II)Cit的實驗研究 12
4.總結與展望 17
致謝  18
參考文獻  19

摘  要

 本文針對現有的煙氣脫硝技術的缺點和局限性，采用化學吸收-生物還原法來脫除煙氣中的氮氧化物，研究了Fe(II)Cit對NO的吸收容量實驗和菌種Enterococcus sp. FR-3的一些生長及還原特性。實驗結果表明：最佳Fe(II)與Cit摩爾配比率應為Fe：Cit=1：2，在此配比下具有最高的NO吸收容量。FR-3能夠有效地還原Fe(III)Cit，而當吸收液內存在一定量NO2-或SO32-時對菌種生長和Fe(III)Cit還原造成一定程度的抑制，以SO32-的抑制作用最為明顯。實驗考察濃度范圍內，SO42-對菌種生長和Fe(III)Cit還原無抑制。

關鍵詞：煙氣脫硝；NO；FR-3；化學吸收-生物還原

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