HRT与进水基质浓度对Anammox反应器效能影响研究

INFLUENCE OF THE HRT AND SUBSTRATE CONCENTRATIONS ON THE PERFORMANCE OF ANAMMOX REACTOR

以产甲烷颗粒污泥与硝化污泥混合物作为接种污泥,在Anammox-UASB反应器中实现反应器的启动与稳定运行。考察了缩短HRT及进水基质浓度变化对系统的影响。结果显示:缩短HRT能有效提高系统处理能力,但HRT过低会导致处理效果降低,本研究得到的最佳HRT为6 h,此时TN去除率76%,TN容积去除负荷最高,为1.82 kg/(m^3·d)。进水基质比例与浓度对Anammox反应器的稳定运行具有重要影响,当进水中NH_4^+-N与NO_2^--N两者比例约为1且浓度均为500 mg/L时,系统处理能力最佳,TN容积去除负荷为1.55 kg/(m^3·d),且去除率为77%。

In Anammox process,UASB was adopted as the reactor and the mixture of methanogenic granular sludge and nitrification sludge as inoculation. The UASB was started up successfully. Then nitrogen removal efficiency was investigated by shorten the hydraulic retention time and improving the substrate concentrations. The removal rate of total nitrogen（ TN） was as high as 76% with hydraulic retention time of six hours,and the volumetric total nitrogen removal rate was up to 1. 82 kg /（ m^3·d）. The substrate concentrations affected the stable operation of the reactor severely. When the concentrations of nitrite and ammonia were both of 500 mg / L,the volumetric total nitrogen removal rate was up to 1. 55 kg /（ m^3·d）,and total nitrogen removal rate was 77%.