| 利用淀粉基共混物作为反硝化固体碳源的研究 |
| 摘要点击 3668 全文点击 1737 投稿时间：2011-07-28 修订日期：2011-11-11 |
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| 中文关键词 可生物降解聚合物 硝酸盐 反硝化 固体碳源 淀粉 |
| 英文关键词 biodegradable polymers nitrate denitrification solid carbon source starch |
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| 中文摘要 |
| 合成了淀粉/聚己内酯(PCL)热塑性共混物(SPCL6),并对其性能进行了表征.研究了SPCL6作为反硝化碳源和生物膜载体用于固相反硝化工艺的可行性.结果表明,SPCL6可作为固体碳源用于去除低C/N水中的硝酸盐,在接种1 d后SPCL6就有明显的脱氮效果.进水硝氮质量浓度对反硝化速率没有明显影响,以SPCL6为固体碳源的反硝化过程符合零级反应.剪切力对反硝化速率具有显著影响,转速从70 r·min-1提高至140 r·min-1时,反硝化速率(以N计)从0.0165 mg·(g·h)-1提升至0.0328 mg·(g·h)-1.红外光谱结果表明,微生物利用后的SPCL6中淀粉和PCL均发生了降解. |
| 英文摘要 |
| Starch/PCL blends (SPCL6) was synthesized and characterized, and used as carbon source and biofilm supporter simultaneously, the feasibility and efficiency in the solid-phase denitrification process was investigated. The results showed that starch/PCL blends could serve as solid carbon source for denitrification of low C/N ratio wastewater. A high denitrification performance was observed after 1 d acclimatization. Solid-phase denitrification is a zero-order reaction, influent nitrate concentration had no obvious effect on denitrification rate. Hydrodynamic shear force played an important role in denitrification process, the denitrification rate increased from 0.0165 mg·(g·h)-1 to 0.0328 mg·(g·h)-1 when the rotating speed increasing from 70 r·min-1 to 140 r·min-1. The IR analysis confirmed the biodegradation of starch and PCL in SPCL6 blends. |
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