水的硬度对反渗透膜结垢的影响研究

Study on Effect on the Hardness of the Water of the RO

当反渗透进水硬度过高时,容易污堵膜,需要采用预处理进行软化,文章研究了进水在经过双碱软化之后,硬度下降60%,但产水电导率和COD与没有经过软化时相比较没有大的变化,都能够达到很高的去除率。最重要的是膜的污堵状况得到了很大的改善,使得膜的清洗周期延长到没有软化前的三倍。

When reverse osmosis water hardness is too high, it is easy fouling membranes, the need for pre-treatment to soften, we study the water softening after double base after the hardness decreased 60 %, but the product water conductivity and COD and has not been softened when compared with no major changes, are able to achieve high removal rate. The most important condition is the fouling of the membrane has been greatly improved, so that the film does not soften the wash cycle is extended to three times before.