水解酸化-复合式膜生物反应器组合工艺处理涤纶碱减量废水的试验研究

采用水解酸化复合式膜生物反应器组合工艺处理涤纶碱减量废水。实验结果表明,本工艺处理效果非常明显,系统出水CODCr为26.6～68.03mgL,系统的CODCr总去除率达到93%～98%,对苯二甲酸的降解率超过94%。水解酸化工艺对苯二甲酸的降解作用很小,降解率为0.23%～6.02%;但对乙二醇的降解作用却非常明显,降解率达到58.94%～71.49%,水解酸化工艺将废水的可生化参数BC提高了0.173～0.227。多孔柔性悬浮填料,一方面,提高了对膜表面的冲刷作用,减少膜表面的沉积层;另一方面,增加了原生动物和后生动物在MBR中的数量,有效地减轻了膜污染。

EXPERIMENTAL STUDY ON THE TREATMENT OF WASTEWATER FROM POLYESTER ALKALI-DECREMENT PROCESS BY HYDROLYTIC ACIDIFICATION-HYBRID MEMBRANE BIOREACTOR PROCESS

A hydrolytic acidification-hybrid membrane bioreactor process was used in the treatment of wastewatr from polyester alkali-decrement process.The results indicated that the COD_ Cr of effluent was only 26.6～68.03 mg/L and the process was efficient in the total removal of COD_ Cr with 93%～98% and TA with 94%.TA was hardly biodegradable with removal rate between 0.23%～6.02% in hydrolytic acidificaton reactor, but ethylene glycol was readily biodegradable with removal efficiency up to 58.94%～71.49%.Treated by hydrolytic acidification process,the aerobic biodegradability B/C of wastewater had been raised by 0.137～0.227.On the one hand, porous-flexible suspended carrier potentiated the scour over the surface of membrane and decreased the cake on the membrane; on the other hand, it increased the number of protozoa and metazoa in MBR, which played an effective role in fouling control of the membrane.