光伏行业含盐废水零排放处理技术的应用

Application of Zero-Discharge Treatment Technology of Saline Waste Water in Photovoltaic Industry

为了实现光伏生产企业含盐废水的"零排放",根据新疆某光伏企业含盐废水特点及其项目配套设施,采用了"预处理+膜处理+三效蒸发"的废水处理工艺来处理光伏生产废水。运行结果显示:预处理以及膜处理系统将废水硬度从平均335 mg/L降到150 mg/L以下,废水含盐量浓缩至4.5%左右,再通过三效蒸发系统使盐分结晶析出,系统产水水质符合《城市污水再生利用工业用水水质》(GB/T 19923-2005)标准并实现回用,达到了"废水零排放"的目标。该废水处理系统可有效提高现有光伏行业废水处理的工艺水平。

To achieve zero-discharge of Saline waste water from photovoltaic production enterprises,a treatment process of ＂pretreatment ＋ membrane treatment ＋ three-effect evaporation＂ was adopted according to thecharacteristics of waste water from a photovoltaic company in Xinjiang and its supporting facilities. Theoperation results showed that the hardness of waste water reduced from an average of 335 mg/L to less than150 mg/L,and the salt content of the waste water was concentrated to about 4.5% after pretreatment andmembrane treatment. The salt was then crystallized through a three-effect evaporation system. The effluentquality met the standard of GB/T 19923-2005 and the effluent was reused,achieving the goal of zero-dischargeof wastewater. The wastewater treatment system can effectively improve the existing technological level in the photovoltaic industry.