【摘要】 为固体碳源反硝化工艺的实际应用提供理论和技术参数,采用一种淀粉基类的可生物降解聚合物作为反硝化微生物的固体碳源和生物膜载体反硝化脱氮,主要考察了低温对填充床反硝化性能的影响。试验结果表明:8~10℃的低温下,进水硝酸氮浓度在60~80m g.L-1之间时,反硝化速率为2.5~4.5m g.(L.h-)1,去除率低于20%,均比常温下有明显的降低;在水力负荷9~12 cm.h-1之间时,反硝化速率与水力负荷成正比;在10~15℃范围内,温度对反硝化率的影响比常温时要大,温度常数K=0.046。更多还原

【Abstract】 Denitrification using a starch-based biologically degradable polymer as the solid carbon source and biofilm support of the denitrifying microorganisms was studied in a packed bed reactor at low temperatures(8-10℃).The results can provide the technical parameters for process applications.At 8-10℃, the denitrification rate was 2.5-4.5 mg ·(L · h)-1 and the nitrate removal rate was below 20% for the nitrate concentrations of 60-80 mg · L-1 in the influent,resulting in considerable decreases the denitrification rate and the nitrite removal rate.For hydraulic loadings of 9-12 cm · h-1,the denitrification rate is directly related to the loading.At 10-15℃,the denitrification rate shows greater dependence on the temperature than that at normal temperature with a temperature constant,K=0.046.更多还原