摘要
接种厌氧颗粒污泥的小试UASB反应器，以含葡萄糖和NaNO3（COD：NO3^- -N=10：1）的自配水为进水，温度在35℃左右，HRT在14～20h之间，经过76天的运行，成功实现了同时产甲烷反硝化功能。UASB反应器的COD和NO3^- -N的负荷分别为15．55kgCOD·m^-3d^-1和1．55kgNO3^- -N·m^3d^-1时，二者的去除率分别达到95％和接近100％；当反应器的负荷继续提高至25kgCOD·m^-3d^-1和2,5kgNO3^- -N·m^-3d^-1时，反应器对COD和NO3^- -N的去除率均持续下降，颗粒污泥逐渐解体，降低负荷至10kgCOD·m^-3d^-1和1．0kgNO3^- -N·m^-3d^-1并运行20d，仍未见明显好转。
Simultaneous methanogenesis and denitrification was successfully realized in a lab-scale UASB reactor after 76 days＇ operation, which was inoculated with anaerobic granular sludge, using synthetic wastewater containing glucose and NaNO3, and the ratio of COD/NO3^ - -N was maintained at about 10： 1, the temperature was around 35 ℃± 1℃, and the hydraulic retention time of the UASB reactor was about 14 - 20 h. When the COD and NO3 -N loading rates were about 15.55 kg COD·m^-3d^-1 and 1.55 kg NO3^ - -N·m^-3d^-1 respectively, the removal effieieneies for COD and NO3 ^- -N reached 95% and 100% respectively. But when the loading rates of the UASB reactor were increased to about 25 kg COD·m^-3d^-1 and2.5 kg NO3^- -N·m^-3d^-1 respectively in a short time, the removal effieieneies for COD and NO3^- -N were decreased continually.Then loading rates were decreased to about 10 kg COD·m^-3d^-1 and 1.0 kg NO3^- -N·m^-3d^-1, after 20 days＇ operation, the performance of the reactor could not be recovered.
出处
《中国沼气》
2006年第2期3-7,共5页
China Biogas
关键词
UASB
产甲烷
反硝化
同时产甲烷反硝化
颗粒污泥
UASB
methanogensis
denitrification
simultaneous methanogenesis and denitrification
granular sludge
