反渗透膜的性能研究及在造纸废水处理中的应用

Performance of reverse osmosis membrane and its application in papermaking Water Treatment

本文研究了反渗透膜BW30和X-20操作压力对膜通量和脱盐率的影响、离子半径对脱盐率的影响。实验结果表明:当操作压力从0.1MPa升高到0.2MPa时,两种膜对盐溶液的通量分别从0.59 L/(m2·h)上升到1.99 L/(m2·h),从0.34 L/(m2·h)上升到1.36 L/(m2·h),而脱盐率从30%下降到20%左右,随着离子半径的增大,膜的脱盐率依次增大;并研究了反渗透膜在造纸废水处理中的应用。实验结果表明:纳滤膜对小分子有机物有很好的截留、脱盐效果明显,并且对色度、浊度有很好的去除能力。

This paper studies reverse osmosis membrane BW30 and X-20 about the affection of operating pressure to the membrane flux and desalination rate and the affection of ionic radius for desalting rate. The experimental result shows that ： when the operating pressure raised from 0.1Mpa to 0.2Mpa, the flux of the salt solution was raised from 0.59L/（m2·h）to 1.99 L/ （m2·h）and 0.34 L/（m2 ·h） to 1.36 L/（m2 ·h） separately, and the desalination rate was dropped from 30%to about 20%. With the ionic radius increased, the membrane desalination rate was raised. This paper also studied the implement of reverse osmosis membrane in papermaking wastewater treatment. The experimental result shows that ：nanofiltration for small organic molecules have good retention, desalination effect is obvious, and for color, turbidity has a good ability to remove.