三级混凝沉淀+两级A/O处理单晶硅太阳能电池废水

Treatment of Wastewater Produced from Monocrystalline Silicon Solar Cell by Combination Process of Three-stage Coagulation Sedimentation and Two-stage A/O

以四川成都某晶体硅太阳能电池生产企业废水处理工程为例,分析了单晶硅太阳能电池企业生产废水进水水质特点及废水处理工艺、主要建(构)筑物设计参数、运行状况及运行费用。针对废水可生化性差、总氮含量高、氟化物浓度高、来水种类多、水质变化大等特点,选择综合调节+三级混凝沉淀+两级A/O组合处理工艺。实践结果表明,该系统运行稳定,出水水质达到《电池工业污染物排放标准》(GB 30484—2013)表1.2中的间接排放标准。

The treatment project of wastewater, which was produced from a monocrystalline silicon solar cell production enterprise in Chengdu City, Sichuan Province, was taken as an example in this pa- per. The wastewater quality characteristics, the process of wastewater treatment, the main design parame- ters, operation status and running cost were introduced. With regard to the characteristics of poor biode- gradability, high content of total nitrogen and fluoride, complicated influent composition and violent fluc- tuation of water quality, the combination process of comprehensive regulation ＋ three-stage coagulation sedimentation ＋ two-stage A/O was applied. Practice results showed that the process performance was stable. The effluent quality could meet the Emission Standard of Pollutants for Battery Industry （GB 30484 -2013 ）, which was the indirect discharge standards listed in Table 1.2.