[Effects of nitrate on anoxic/anaerobic oxidation of methane in the aged refuse].
This work investigated the effects of nitrate on anoxic/anaerobic methane oxidation in the aged refuse landfilled 10-12 years by full-factor experiments. The results showed that under anoxic/anaerobic condition, nitrate could promote the removal of methane in the aged refuse. The contents of CH4 and NO3(-) -N had significant influences on the removal of CH4 and the generation of N2, and there were significant interactions as well (P < 0.05). The increasing initial CH4 content evidently enhanced the removal of CH4 and the production of N2. Furthermore, the addition of NO3(-) -N obviously improved the de-nitrification process. The results suggested that nitrate reduction could be coupled to anoxic/anaerobic oxidation of methane in the aged refuse. In the experimental condition, the effort of coupling was most effective when the concentrations of CH4 and nitrate were 30% and 110 mg x kg(-1), respectively.
College of Science and Engineering, Jinan University, Guangzhou 510632, China. 124917785@qq.com
Yan-Yan
YY
Liu
College of Science and Engineering, Jinan University, Guangzhou 510632, China.
Yan
Y
Long
School of Environment and Energy, South China University of Technology, Guangzhou 510640, China.
Hua
H
Yin
College of Science and Engineering, Jinan University, Guangzhou 510632, China.
Jin-Shao
JS
Ye
College of Science and Engineering, Jinan University, Guangzhou 510632, China.
Bao-Yan
BY
He
College of Science and Engineering, Jinan University, Guangzhou 510632, China.
Na
N
Zhang
D008697:Methane / Q000737:chemistry*; D009566:Nitrates / Q000737:chemistry*; D058465:Nitrification; D010084:Oxidation-Reduction; D012037:Refuse Disposal / Q000379:methods*
D009566:Nitrates; D008697:Methane