基于超滤处理工艺的洗车废水循环利用技术

摘要

As pretreatment processes,coagulation and sedimentation-sand filtration and single sand filtration were compared by using ultrafiltration as key treatment process of car washing wastewater.Removal rates of turbidity from both processes were 99.4 ％ and 99.1％.Removal rates of COD were 69.5 ％ and 53.4 ％.Removal rates of anionic surfactant were 69.2 ％ and 27.6 ％.The results showed that the recycling method of car washing wastewater based on ultrafiltration technology was feasible under the condition of reasonable pretreatment processes.%以超滤为核心工艺处理洗车废水,对比了采用混凝沉淀-砂滤和单独采用砂滤作为预处理时的出水指标,两种工艺对浊度的去除率分别为99.4％和99.1％,对COD的去除率为69.5％和53.4％,对阴离子表面活性剂(Anionic surfactant,AS)的去除率为69.2％和27.6％.结果表明,采用适合的预处理单元,以超滤为核心的处理工艺在洗车废水循环回用方面具有可行性.