浸没式平板膜生物反应器处理工业区污水试验研究

膜生物反应器(MBR)是膜技术和污水生物处理技术相结合的污水处理新工艺,近年来在城市污水和工业废水的处理中得到越来越多的关注。本试验采用浸没式平板膜生物反应器处理某城市工业区污水,并对该平板膜在运行过程中的膜污染情况进行试验研究,同时介绍其污水处理效果。试验表明,该MBR在次临界操作运行的情况下,以通量13L(m2·h)运行33d后,膜污染非常严重,将平板膜取出清洗后改以8L(m2·h)恒流运行,在此后60多d运行时间内,MBR系统保持稳定。同时,系统对该工业区污水CODCr、BOD5、NH3N和浊度的平均去除率分别稳定在80%、95%、90%和98%以上,但对总氮的去除效果一般,去除率只有50%～60%。

TREATMENT OF INDUSTRIAL PARK WASTEWATER USING A SUBMERGED FLAT-SHEET MEMBRANE BIOREACTOR

Membrane bioreactors (MBRs), in which membranes are applied to biological wastewater treatment, have been greatly developed both in the treatment of domestic and industrial wastewater recently.A submerged flat-sheet membrane bioreactor was used for the treatment of industrial park wastewater in a city.The aims of this study were to investigate the changes in membrane fouling in the operation of a flat-sheet membrane bioreactor and also the treatment efficiency was given.Experiment results showed that membrane fouling was serious when the MBR operating at flux 13 L/(m~2·h) for about 33 days, but increasing slowly during 2 months operation at flux 8 L/(m~2·h).The removal efficiency of COD_ Cr,BOD_5,NH_3-N and turbidity was 80%,95%,90% and 98% respectively, but the removal rate of total nitrogen was only 50%～60%.