陶瓷膜处理乙醇发酵废水的工艺条件研究

Treating Ethanol Fermentation Wastewater with Ceramic Membrane

发酵法生产乙醇的过程中产生大量废水,文中采用陶瓷膜处理乙醇发酵废水,考察了膜孔径、料液性质以及操作条件对过滤过程的影响。结果表明,陶瓷膜过滤乙醇发酵废水有较好的效果,化学需氧量(COD)去除率达80%,固体悬浮物(SS)截留率在99%以上。确定了孔径为200nm的膜管在pH值为8.0,错流速度为5m/s,温度为50℃,操作压力0.15MPa条件下操作,膜通量大于700L/(m2·h)。

The wastewater from ethanol fermentation was filtrated by ceramic membrane, the effects of pH and operation parameters on membrane filtrate flux were investigated. Experimental results showed that the removal rate of chemical oxygen demand （COD） and suspended solids （SS） was about 80% and above 99% respectively. The highest membrane filtrate flux was obtained under the optimal conditions of pH8.0, cross-flow velocity 5m/s, temperature 50℃ and trans-membrane pressure 0.15 MPa using the membrane with pore size of 200 nm.