不同填料对污泥作为生物反硝化碳源的影响和特性研究

在30℃和80～95 r.min-1的条件下,利用摇瓶试验探讨了弹性填料(YDT)和竹子作为填料对污泥为主要碳源的系统反硝化特性和机理。试验结果表明,以污泥/竹子系统中NO3--N的去除速率最大(2.51 g.m-.3h-1),其次是污泥/YDT系统(1.30 g.m-.3h-1),最后是污泥系统(0.53 g.m-.3h-1);而NO2--N积累量也呈现一定的趋势(以每去除1 g NO3--N计算):污泥/竹子系统最高、污泥系统次之、最后是污泥/YDT系统;污泥特性是决定系统反硝化效果的主要因素。然后以污泥/竹子系统进行深入了研究发现,水温对污泥/竹子系统的反硝化过程具有较为显著的影响。

PROPERTIES AND INFLUENCES OF BIODENTTRIFICATION USING EXCESS SLUDGE AS CARBON SOURCE WITH THE DIFFERENT BIOCARRIERS

Biodenitrification properties and mechanisms were investigated of using YDT and bamboo as biocarriers and excess sludge as main carbon source in some shake flask under 30℃ and 80～95 r·min-1.The experimental results demonstrated that the largest removal rate of NO3——N(2.51 g·m-3·h-1) was observed in the excess sludge/bamboo unit,then excess sludge/YDT unit(1.30 g·m-3·h-1),finally excess sludge unit(0.53 g·m-3·h-1),and the accumative NO2——N amount was computed as 1g NO3——N was removed,the largest accumative NO2——N was obtained by excess/sludge system,and the smallest accumative NO2——N was appeared in excess sludge/YDT system.The excess sludge properties was decided factor when excess sludge was used as carbon source for biodenitrification.The influences factor of water temperature was further studied about excess sludge/bamboo denitrification system,and water temperature could obviously influenced the process of biodenitrification.