The AF fast start experiment under the room temperature and short HRT conditions in the advanced municipal sewage treatment

摘要

AF adopts two steps to start.At first,it forms membrane in aerobic conditions,which fasten the microorganisms on the padding.It adopts intermittent batches aerobic row dry process during the process,which can fasten the activatedsludge on the padding;second,in order that the reactor speeds up the adaptation for effluent,the secondary settling pond effluent and campus life sewage are sent into the AF reactor according to the proportion of dosing complex way into water.The raw water comes from sewage plant,and it starts AF in the temperature of 23-28℃,HRT for 3 to 4h conditions.The experimental results show that the reactor water COD removal rate of the original water stay 28％ on average after 7 weeks.It descripts and analyses 3 phase during the anaerobic start,the influence of HRT on the COD removal and the influence of temperature on the COD removal.As a conclusion,the AF is feasible,efficient,low energy consumption in the operation mode in the advanced municipal sewage treatment and also can be used as other deep treatment of wastewater pretreatment technology.