微纳米气浮技术用于炼化污水的深度处理  

Advanced treatment of refining sewage with a new micro/nano-bubble flotation technology

作　　者：张敏[1] 宋昭峥[2] 孙珊珊[1] 张志勇[1] 穆红岩[1] 赵立平[1] 李永峰[1] 张忠智[1] 

机构地区：[1]中国石油大学(北京)重质油国家重点实验室,北京102249 [2]中国石油大学(北京)理学院,北京102249

出　　处：《环境工程学报》2016年第2期599-603,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金面上项目(51474223;41172333)

摘　　要：采用作者自行设计制作的混凝-微纳米气浮装置对炼化企业污水处理厂二沉池出水进行深度处理,考察了混凝剂投加量、工作压力、回流比和水力停留时间对气浮效果的影响,结果表明,最佳工艺参数为:混凝剂Fe Cl330 mg/L,工作压力0.2 MPa,回流比为20%,水力停留时间6 min。在此实验条件下,COD去除率为39.13%,SS去除率为51.85%,气浮出水COD<60 mg/L,达到了《污水综合排放标准》(GB 8978-1996)一级B标准。Coagulation and micro / nano-bubble flotation equipment designed and constructed by the authors was used for advanced treatment of the secondary sedimentation tank effluent of refining sewage treatment plant.The influence of flocculant dosage,working pressure,reflux ratio and hydraulic retention time on flotation performance was investigated. The results demonstrated that the optimum process conditions were as follows： Fe Cl3 dosage of 30 mg / L,working pressure of 0. 2 MPa,reflux ratio of 20% and hydraulic retention time of 6 min.Under these conditions,the removal efficiency of COD and SS reached 39. 13% and 51. 85%,respectively. The COD of flotation effluent was〈 60 mg / L which reached the first level B criteria in Integrated Wastewater Discharge Standard（ GB8978-1996）.

关 键 词：微纳米气泡 微纳米气浮 炼化污水 深度处理 

分 类 号：X703.1[环境科学与工程—环境工程]