油田钻井废水深度处理技术

采用化学混凝-铁炭微电解-电渗析技术对钻井废水进行了深度处理实验。实验结果表明：废水pH和反应时间是影响铁炭微电解处理效果的重要因素，当废水pH为1．5，反应时间为120min时，COD去除率为50％；在电渗析除Clˉ过程中，采取直流方式出水时，在进水流量为20L／h、操作电压为30V、运行时间为15min的条件下，Clˉ去除率可达75％；而采取循环方式出水时，运行时间是影响电渗析除Clˉ效果的主要因素，当运行时间大于等于60min时，出水中Clˉ的质量浓度低于350mg/L，达到DB51／190-1993（四川省污水排放标准》中的三级排放标准。

Technology for Advanced Treatment of Drilling Wastewater from Oil Field

Advanced treatment of drilling wastewater was carried out by chemical coagulation-iron-carbon microelectrolysis-electrodialysis process.The experimental results show that: Wastewater pH and reaction time are the main factors;The COD removal rate is 50% when the wastewater pH is 1.5 and the reaction time is 120 min;In the process for Cl-removal by electrodialysis,when the direct current effluent mode is adopted and the influent flow is 20 L/h,the operation voltage is 30 V and the running time is 15 min,the C...