Denitrification of Nitrate-Contaminated Water Using Poly (3-Hydroxybutyrate-co-3-Hydroxyvalerate) as Carbon Source
文献类型： 会议论文
第一作者： Lijiao Sun
作者： Lijiao Sun 1 ; Lanhe Zhang 1 ; Xuming Wang 2 ;
作者机构： 1.School of Chemical Engineering, Northeast Dianli University Jilin 132012, China
2.Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences Beijing 100097, China
关键词： carbon source;nitrate;denitrification;PHBV
会议名称： International Conference on Biomedical Engineering and Biotechnology (iCBEB 2012)
主办单位：
页码： 1307-1310
摘要： Nitrate removal from the synthetic water medium was investigated using Poly (3-Hydroxybutyrate -co-3-Hydroxyvalerate) (PHBV) as solid carbon source and the supporter for microorganisms. The experiments were carried out by batch and continuous modes, respectively. The batch experiment results indicated that a stable denitrification rate (1.22 mg NO_3-N/(m~2·h)) was achieved after 20-day acclimation. The colonization of substrate by bacteria was the rate limiting factor for nitrate removal. The continuous flow reactor packed with PHBV as carbon source started up easily, and denitrification rate increased gradually with running time. After 2-week running, a stable denitrification rate was reached, and 90% nitrate was removal from the influent containing 30mg/L NO_3-N with 3 h hydraulic retention time (HRT). HRT is a crucial factor for the denitrification reactor. Removal efficiency of nitrate decreased to 70%with 2h HRT.
分类号： R318-53
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