摘要：

芳纶生产废水具有含盐量高、有机物含量高且难降解、硬度极高等特点，对传统处理工艺具有很大挑战，且传统处理工艺投资及运行费用较高。以某芳纶废水零排放工程为实例，介绍了芳纶废水水质特点、工艺流程、主要构筑物及设备参数和运行效果，重点介绍了常温结晶技术（ATC^®）、高盐反渗透技术（HSRO^®）的运行效果。工程实际运行结果表明，“常温结晶（ATC^®）+纳滤+高盐反渗透（HSRO^®）+MVR+反渗透”工艺设计合理，抗冲击负荷强，处理效果好，运行费用低。系统产水电导率<30 μS/cm，并全部回用；副产品NaCl达到《工业盐》（GB/T 5462—2003）一级标准，且无杂盐产生，实现了芳纶生产废水真正意义上的零排放。工程自投运以来，出水水质及系统运行长期稳定，对同类废水项目具有较好的借鉴意义。

关键词: 常温结晶, 高盐反渗透, 芳纶废水, 零排放

Abstract:

The wastewater from aramid fiber production has the characteristics of high salt content，high organic content，refractory，and high hardness，which poses a high challenge to the traditional treatment process. And the traditional treatment process has high investment and operation cost. Taking a zero discharge project of aramid fiber wastewater as an example，the water quality characteristics，technological process，structure and equipment parameters and operation results of aramid fiber wastewater were introduced，with emphasis on the operation results of normal temperature crystallization（ATC^®） and high salt reverse osmosis（HSRO^®） technology. The practical operation results of the project showed that the process design of “ATC^®+nanofiltration+HSRO^®+MVR+reverse osmosis” was reasonable，with the characteristics of strong impact load resistance，good treatment effect，and low operating cost. The electrical conductivity of the water produced by the system was less than 30 μS/cm，and the water was all reused. The by-product NaCl met the first level standard of Industrial Salt（GB/T 5462—2003），and no other salt was produced. Thus，the zero discharge of aramid fiber production wastewater was realized in a real sense. Since the project was put into operation，the effluent quality and system operation had been stable for a long time，which had a good reference for similar wastewater projects.

Key words: temperature crystallization, high salt reverse osmosis, aramid fiber wastewater, zero discharge

中图分类号: 

• X703.1

• X783.4