Influence of air-water ratio on the N2O production in biological aerated filter - 文章详情页

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Biological　aerated　filter　(BAF)　has　been　widely　used　in　treatment　of　wastewater　and　reclaimed　water.　To　date,　little　research　has　been　done　to　control　N2O　production　in　BAF.　N2O　production　from　municipal　wastewater　at　different　air-water　ratio　of　9.8:1,　5.0:1,　2.5:1　respectively　was　investigated　in　biological　aerated　filter　(BAF).　The　obtained　results　show　that　NH4+-N　and　TN　removal　efficiency　decreases　with　the　decrease　of　air-water　ratio.　Under　the　condition　of　air-water　ratio　of　9.8:1,　5.0:1,　2.5:1,　the　percent　of　N2O　emission　from　BAF　was　418.0306,　247.9406,　123.0638×10-6,　respectively,　indicating　that　N2O　production　in　BAF　can　not　be　ignored.　N2O-N　dissolved　in　the　mixture　at　different　air-water　ratio　increased　first　and　then　decreased　along　the　filter　layer,　which　was　consistent　with　the　variation　of　NO2--N　concentration.　Therefore,　N2O　might　be　produced　during　nitrification.　Considering　nitrification　efficiency,　TN　removal　efficiency　and　N2O　emission　control,　the　optimal　air-water　ratio　is　5.0:1.　©　2016,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.

关键词：

Air-water ratio; Biological aerated filter; Municipal wastewater; N2O; Nitrification

作者机构：

[ 1 ] [Liu, X.]Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China
[ 2 ] [Liu, X.]School of Environment and Natural Resources, Renmin University of China, Beijing, 100872, China
[ 3 ] [Zhou, Y.]Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China
[ 4 ] [Meng, X.]Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China
[ 5 ] [Gu, P.]Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China
[ 6 ] [Yang, Q.]Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China
[ 7 ] [Huang, S.]Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China

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