| pH对以PBS为反硝化碳源和生物膜载体去除饮用水源水中硝酸盐的影响 |
| 摘要点击 2237 全文点击 1563 投稿时间：2004-11-25 修订日期：2005-01-16 |
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| 中文关键词 饮用水 反硝化 生物膜 可生物降解多聚物 |
| 英文关键词 drinking water denitrification biofilm biodegradable polymer |
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| 中文摘要 |
| PBS为一种新型可生物降解多聚物(BDPs),可以作为生物膜载体和碳源去除饮用水中的硝酸盐,对该工艺中pH的影响进行了研究.结果表明:PBS颗粒表面可以形成致密的生物膜,对膜内的反硝化菌形成良好的保护作用.PBS反硝化系统承受pH冲击负荷的能力优于传统填料为载体的反硝化系统,当进水pH介于5.0～9.0之间时,反硝化过程中溶液的pH趋向中性,硝态氮的去除速率为0.60～0.63 mg/(g·d),最高达到0.70 mg/(g·d)(pH 7.5～8.0).当溶液中pH在6～8之间时,出水亚硝酸盐不稳定;pH<6时,出水中亚硝酸盐浓度高达0.7 mg/L;pH>8时出水中的亚硝酸盐浓度低于0.1 mg/L. |
| 英文摘要 |
| PBS,a new kind of biodegradable polymers(BDPs),was used as carbon source and biofilm carrier to remove nitrate from drinking water.The effect of pH was investigated in detail and the results show that fine biofilm can form on the surface of PBS granules and protect denitrifiers.PBS denitrification system can endure higher pH shocking than that of traditional carrier.When influent pH was between 5.0～9.0,effluent pH tended to be neutral and denitrification rate was 0.60～0.63 mg/(g·d) while the maximum value was 0.70 mg/(g·d)(pH 7.5～8.0).Effluent nitrite level was unstable when pH of solution was 6～8.It was as high as 0.7 mg/L when pH was below 6 and no more than 0.1 mg/L when pH was higher than 8. |
