厌氧-MBR组合工艺生物除磷试验

通过静态试验考察除磷菌的厌氧释磷和好氧吸磷情况。在厌氧状态、在低有机负荷率的条件下，污泥释磷的速率随有机负荷率的升高而增加，但当有机负荷率超过一临界数值0．12gSCOD／gMLSS后，有机负荷率不再成为释磷菌厌氧释磷的限制性因素。此外，试验考察了硝态氮的存在对厌氧释磷和后续好氧吸磷的影响，发现硝态氮的存在不利于除磷菌的厌氧释磷并从而限制了在后续好氧状态下的吸磷效果。在上述试验的基础上，采用厌氧工艺与MBP,联用处理生活污水来强化生物除磷效果，在静态试验的基础上选定了各个工段的工艺运行参数，并在此条件下进行了为期6个月的连续性试验，发现系统对COD、TP、SS、NH3-N和TN的平均去除率分别为92．50％、84．25％、100％、94．09％和85．33％。

BIOLOGICAL PHOSPHORUS REMOVAL BY A COMBINATION OF ANAEROBIC PHASE AND MBR

Batch experiments were carried out to obtain an understanding of phosphorus release and uptake under the anaerobic condition and then the aerobic condition respectively.Under anaerobic condition,it was found that the extent of phosphorus release appeared to increase with the increases of the initial organic loading rate when the initial organic loading rate was up to 0.12g SCOD/g MLSS.When the initial organic loading rate was higher than 0.12g SCOD/g MLSS,the amount of phosphorus release per unit mass of MLSS reached nearly the same stationary value.In addition,the effect of NO-x-N on the phosphorus release and uptake was also investigated,and it was found that the existence of NO-x-N was disadvantageous to the phosphorus release.Based upon the above investigations,the process configuration of membrane bioreactor(MBR) in combination with anaerobic phase was proposed to enhance the removal of phosphorus in treating domestic wastewater.During the experimental period of six months,average removals of 92.50%,84.25%,100%,94.09% and 85.33% were achieved for COD,TP,SS,NH3-N and TN respectively.