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Nitric oxide enhanced reduction in a rotating drum biofilter coupled with absorption by Fe II (EDTA)
Author(s) -
Chen Jun,
Dai Qizhou,
Qian Haifeng,
Jiang Yifeng,
Chen Jianmeng
Publication year - 2013
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.3865
Subject(s) - biofilter , chemistry , flue gas , absorption (acoustics) , nox , nitric oxide , denitrification , ozone , absorption efficiency , inorganic chemistry , oxide , nuclear chemistry , environmental engineering , nitrogen , materials science , organic chemistry , environmental science , zoology , composite material , biology , combustion
BACKGROUND: The ongoing emission of nitric oxide (NO) is a serious persistent environmental problem, because it contributes to atmospheric ozone destruction and global warming. A novel and effective system was developed for the complete treatment of NO from flue gases. The system features NO absorption by Fe II (EDTA) and biological denitrification in a rotating drum biofilter (RDB). RESULTS: After 100 mg L −1 Fe II (EDTA) was added to the nutrient solution, the results show that the NO removal efficiency was improved from 70.56% to 80.15%, the optimal temperature improved from 32.5 °C to 40.5 °C, and the pH improved from 7.5 to 8.0–8.3. A maximum NO removal efficiency of 96.5% was achieved when 500 mg L −1 Fe II (EDTA) was used in the nutrient solution. CONCLUSION: This experiment demonstrates that Fe II (EDTA) could not only improve the mass transfer efficiency of NO from gas to liquid, but also serve as an electron donor for the biological reduction of NO to N 2 . The new integrated treatment system seemed to be a promising alternative for the complete treatment of NO from flue gases. © 2012 Society of Chemical Industry