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之问时，反硝化过程中溶液的pH趋向中性，硝态氮的去除速率为0．60～0．63mg／（g·d），最高达到0．70mg／（g·d）（pH7．5～8．0）．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0．7mg／L；pH〉8时出水中的亚硝酸盐浓度低于0．1mg／L．
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 thart 0.1 mg/L when pH was higher than 8.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2006年第2期290-293,共4页
Environmental Science
基金
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
关键词
饮用水
反硝化
生物膜
可生物降解多聚物
drinking water
denitrification
biofilm
biodegradable polymer
