【摘要】 UASB在处理城市生活污水中有着广泛的应用前景;但在运行过程中,未充分降解的悬浮物易在UASB反应器中堆积,导致已颗粒化的厌氧污泥的活性降低,影响处理效果。作者采用化学混凝预处理法来探讨对UASB的运行影响。通过实验得知化学混凝实现了去除进水中的SS,在FeCl3的投入量为70mg/L,HRT为2h时,UASB的COD去除率达50%～60%。更多还原

【Abstract】 Upflow Anaerobic Sludge Blanket(UASB)process has a broad prospect of application to treating low conˉcentration sewage due.Suspensiors undegraded sufficiently tend to compile in UASB reactor during the dispose of low-concentrate sewage with UASB process,which leads to the active decrease of anaerobic sludge existing in particle morphology,therefore affecting the treatment effect of UASB process.Chemical coagulation is applied to pretreat sewage for studying its influence on the running of UASB process,the results show that chemical coagulation can sucˉcessfully remove the SS in inlet water,when the dose of FeCl 3 is70mg/L,HRT is two hours,and the removal rate of C0D is about50%～70%,satisfactory results are obtained.更多还原