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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
引用本文:周海红,王建龙,赵璇.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[J].环境科学,2006,27(2):290-293.
作者姓名:周海红  王建龙  赵璇
作者单位:1. 清华大学核能与新能源技术研究院环境技术研究室,北京,100084;济南大学化学与环境学院,济南,250022
2. 清华大学核能与新能源技术研究院环境技术研究室,北京,100084
基金项目:国家自然科学基金项目(59978020);高等学校博士学科点专项科研基金项目
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.

关 键 词:饮用水  反硝化  生物膜  可生物降解多聚物
文章编号:0250-3301(2006)02-0290-04
收稿时间:2004-11-25
修稿时间:2004-11-252005-01-16

Denitrification Using PBS as Carbon Source and Biofilm Supporter: Effect of pH
ZHOU Hai-hong,WANG Jian-long and ZHAO Xuan.Denitrification Using PBS as Carbon Source and Biofilm Supporter: Effect of pH[J].Chinese Journal of Environmental Science,2006,27(2):290-293.
Authors:ZHOU Hai-hong  WANG Jian-long and ZHAO Xuan
Institution:Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, China.
Abstract: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 to approximately 9.0, effluent pH tended to be neutral and denitrification rate was 0.60 to approximately 0.63 mg/(g x d) while the maximum value was 0.70 mg/(g x d) (pH 7.5 to approximately 8.0). Effluent nitrite level was unstable when pH of solution was 6 to approximately 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.
Keywords:drinking water  denitrification  biofilm  biodegradable polymer
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