利用可生物降解聚合物去除饮用水源水中硝酸盐  

Removal of nitrates from drinking water using biodegradable polymers as both substrate and biofilm carrier

作　　者：周海红[1] 赵璇[1] 王建龙[1] 

机构地区：[1]清华大学核能与新能源技术研究院

出　　处：《清华大学学报（自然科学版）》2006年第3期434-436,共3页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(5997802050508018)

摘　　要：采用一种非水溶性可生物降解多聚物（BDPs）材料PBS颗粒作为生物异养反硝化的固体碳源和生物膜载体去除饮用水源水中的硝酸盐。结果表明：在15d内，PBS颗粒表面能够形成反硝化生物膜，生物膜生物对pH值、进水溶解氧（Do）冲击负荷的适应能力很强；当溶液pH值介于4．5～9．5时，反硝化速率为0．48～0．7mg·（g．d）^-1。进水DO介于1．4～8．5mg·L^-1时，反硝化速率0．63～0．68mg·（g．d）^-1；温度对反硝化影响较大，30℃时的反硝化速率为0．72mg·（g．d）^-1～，远大于13℃下的0．23mg·（g．d）^-1。PBS, in the form of insoluble biodegradable polymers pellets, was used as the solid substrate and the biofilm carrier of biological heterotrophic denitrifying bacteria to remove nitrates from drinking water. The experimental results demonstrate that denitrifiers form biofilms on the surfaces of the PBS granules within 15 d. The attached biomass has excellent denitrification ability despite the high pH and dissolved oxygen shock. The denitrification rate is 0. 63 -0. 68mg · （g.d）^-1 for pH between 4.5-9.5 and 0.48 - 0.7 mg · （g. d）^-1 when the dissolved oxygen is 1.4 -8. 5 mg · L^-1. The temperature also greatly affects the denitrification rate with a rate of 0. 72mg · （g. d）^-1 at 30 ·C which is much larger than the rate of 0. 23mg · （g.d）^-1 at 13 ·C.

关 键 词：饮用水 反硝化 硝酸盐 可生物降解聚合物 

分 类 号：X703[环境科学与工程—环境工程]