| Continuous treatment of azo acid dyes by photo-dependent denitrifying sludge |
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| 作者姓名： | HONG Jing-lan Masahiro Otaki Joseph D.Rouse Kenji Furukawa |
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| 作者单位： | [1]DepartmentofEnvironmentalEngineeringofOchanomizuUniversity,2－1－1Otsuka,Bunky－ku,Tokyo112－8610,Japan.E－mail：g0170419@edu.cc.ocha.ac.jp [2]DepartmentofCivilandEnvironmentalEngineering,Kumam |
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| 摘 要： | Simultaneous removals of dye and nitrate by photo-dependent denitrifying sludge(PDDS)have been demonstrated in a continuousflow bench-scale reactor.The best C/N for the degradation of azo dyes by PDDS was 1.5.The specific removal rate of azo dye AB92 decreased with a decrease in hydraulic retention time and increased with a decrease in solids retention time.The degradation rate of TOC decreased with a decrease in hydraulic retention time.AB92,which has nitro and hydroxyl substitutions in non-para positions,was uniquely degraded.During continuous flow treatment experiments using PDDS,complete degradation of azo dyes AB92 and AO20 at influent concentrations of 40mg/L and 30mg/L,respectively,was achieved with an HRT of 16.
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| 关 键 词： | 光相关性去氮污泥 连续处理 同时除去 偶氮染料 污水处理 |
| 收稿时间： | 2001/6/25 0:00:00 |
| 修稿时间： | 2001/11/30 0:00:00 |
Continuous treatment of azo acid dyes by photo-dependent denitrifying sludge |
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| HONG Jing-lan,Masahiro Otaki,Joseph D.Rouse,Kenji Furukawa.Continuous treatment of azo acid dyes by photo-dependent denitrifying sludge[J].Journal of Environmental Sciences,2002,14(3):296-302. |
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| Authors: | Hong Jing-Lan Masahiro Otaki Rouse D Joseph Kenji Furukawa |
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| Institution: | 1. Department of Environmental Engineering of Ochanomizu University,2-1-1 Otsuka,Bunky-ku,Tokyo 112-8610,Japan
2. Department of Civil and Environmental Engineering,Kumamoto University,2-39-1 Kurokami,Kumamoto 860-8555,Japan |
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| Abstract: | Simultaneous removals of dye and nitrate by photo dependent denitrifying sludge(PDDS) have been demonstrated in a continuous flow bench scale reactor. The best C/N for the degradation of azo dyes by PDDS was 1.5. The specific removal rate of azo dye AB92 decreased with a decrease in hydraulic retention time and increased with a decrease in solids retention time. The degradation rate of TOC decreased with a decrease in hydraulic retention time. AB92, which has nitro and hydroxyl substitutions in non para positions, was uniquely degraded. During continuous flow treatment experiments using PDDS, complete degradation of azo dyes AB92 and AO20 at influent concentrations of 40 mg/L and 30 mg/L, respectively, was achieved with an HRT of 16. |
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| Keywords: | photo dependent denitrifying sludge (PDDS) continuous treatment simultaneous removals azo dye nitrate |
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