Zhou Hai-hong, Wang Jian-long, Zhao Xuan
Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, China.
Huan Jing Ke Xue. 2006 Feb;27(2):290-3.
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.
聚丁二酸丁二醇酯（PBS）是一种新型的可生物降解聚合物（BDP），被用作碳源和生物膜载体以去除饮用水中的硝酸盐。详细研究了pH值的影响，结果表明，在PBS颗粒表面可形成良好的生物膜并保护反硝化菌。PBS反硝化系统比传统载体能承受更高的pH冲击。当进水pH值在5.0至约9.0之间时，出水pH值趋于中性，反硝化速率为0.60至约0.63毫克/（克×天），最大值为0.70毫克/（克×天）（pH 7.5至约8.0）。当溶液pH值为6至约8时，出水亚硝酸盐水平不稳定。当pH值低于6时，其高达0.7毫克/升，当pH值高于8时，不超过0.1毫克/升。
