Effect of phenol load on nitrogen removal in pre-denitrification process - 文章详情页

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The　pre-denitrification　SBR　process　of　treating　municipal　waste　water　including　phenol　was　investigated　with　the　combination　of　short-term　and　long-term　tests.　The　results　show　that　the　ammonia　oxidation　rate　decreases　gradually　with　the　increase　of　concentration　of　phenol　(0-175　mg/L),　with　the　specific　substrate　ulitization　rates　ranging　of　2.898-0.694　d-1.　The　average　ammonia　oxidation　rate　is　4.091　mg/(g·h)　in　pre-denitrification　system　and　2.26　times　short-term　test　result　(1.812　mg/(g·h)).　The　ratio　of　ammonia　oxidation　rate　to　phenol　concerntration　keeps　at　-0.031±0.005.　The　phenol　and　ammonia　can　be　removed　at　0-5　h　with　the　respective　removal　efficiencies　of　24.2%　and　23.5%.　Moreover,　the　ammonia　oxidation　damage　can　be　recovered　to　normal　levels　after　15-18　d　through　microbial　own　structure　function　change.　However,　the　toxicity　inhibition　at　the　high　phenol　concentrations　exhibites　an　irreversible　damage,　and　DNA　concentration　in　extracellular　polymer　substance　varies　from　2.53　mg/g　up　to　34.6　mg/g.

关键词：

Chemicals removal (water treatment) Ammonia Denitrification Phenols Oxidation Wastewater treatment Nitrogen removal

作者机构：

[ 1 ] [Lu, Congcong]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
[ 2 ] [Lu, Congcong]Central Research Institute of Building and Construction Co. Ltd., MCC Group, Beijing 100088, China
[ 3 ] [Wang, Shuying]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
[ 4 ] [Ge, Shijian]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
[ 5 ] [Zhang, Qiong]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
[ 6 ] [Yang, Jinhui]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
[ 7 ] [Peng, Yongzhen]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China

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wsy@bjut.edu.cn

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