In this work, the denitrification performance of a bio-reactor based on nanoscale zero-valent iron (NZVI) coupling autohydrogenotrophic denitrification was investigated. A series of bio-reactors were configured by inoculating and acclimating pure culture capable capable of denitrification. Effects of various parameters including nitrate (NO3-_N) loading, NZVI to nitrogen ratio (Fe/N), pH and atmosphere on denitrification were evaluated by batch tests. The results showed that the optimum Fe/N and NO3-N loading were 2.8 and 105 mg/L, respectively. Dentrification process remained unaffected by pH ranging from 6.0 to 9.0, while sharp accumulation of nitrite (NO2-_N) occurred at pH 9.0. Complete NO3-_N removal was obtained by providing both nitrogen (N2) and hydrogen gas (H2). In general, excellent nitrogen removal efficiency was always achieved in the chemical-biological coupling system, indicating that the system had strong stability and adaptability for practical application, which offered both theoretic and technical supports to a new efficient and costeffective method to eliminate NO3-_ N from water.
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页码:1346 / 1349
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[Anonymous], 2005, Standard methods for the examination of water and waste- water
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Univ Tsukuba, Doctoral Program Life & Environm Sci, Tsukuba, Ibaraki 3058572, JapanChina Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China
Li, Miao
Feng, Chuanping
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China Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R ChinaChina Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China
Feng, Chuanping
Zhang, Zhenya
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Univ Tsukuba, Doctoral Program Life & Environm Sci, Tsukuba, Ibaraki 3058572, JapanChina Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China
Zhang, Zhenya
Lei, Xiaohui
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China Inst Water Resources & Hydropower Res, Beijing, Peoples R ChinaChina Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China
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Chen, Rongzhi
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Univ Tsukuba, Doctoral Program Life & Environm Sci, Tsukuba, Ibaraki 3058572, JapanChina Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China
Chen, Rongzhi
Yang, Yinan
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Univ Tsukuba, Doctoral Program Life & Environm Sci, Tsukuba, Ibaraki 3058572, JapanChina Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China
Yang, Yinan
Sugiura, Norio
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Univ Tsukuba, Doctoral Program Life & Environm Sci, Tsukuba, Ibaraki 3058572, JapanChina Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China
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Univ Tsukuba, Doctoral Program Life & Environm Sci, Tsukuba, Ibaraki 3058572, JapanChina Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China
Li, Miao
Feng, Chuanping
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China Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R ChinaChina Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China
Feng, Chuanping
Zhang, Zhenya
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Univ Tsukuba, Doctoral Program Life & Environm Sci, Tsukuba, Ibaraki 3058572, JapanChina Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China
Zhang, Zhenya
Lei, Xiaohui
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China Inst Water Resources & Hydropower Res, Beijing, Peoples R ChinaChina Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China
Lei, Xiaohui
Chen, Rongzhi
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Univ Tsukuba, Doctoral Program Life & Environm Sci, Tsukuba, Ibaraki 3058572, JapanChina Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China
Chen, Rongzhi
Yang, Yinan
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Univ Tsukuba, Doctoral Program Life & Environm Sci, Tsukuba, Ibaraki 3058572, JapanChina Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China
Yang, Yinan
Sugiura, Norio
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Univ Tsukuba, Doctoral Program Life & Environm Sci, Tsukuba, Ibaraki 3058572, JapanChina Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China