磺化钻井液钻井废水的可生化性测试

Measurement of Sulfonated Drilling Fluid Wastewater Bio-treatment Feasibility

采用BOD/COD比值法、呼吸速率法以及摇瓶实验方法对混凝后钻井废水及将其经光催化氧化后出水的可生化性进行了测试,并对这3种评价方法进行了比较。结果表明,仅经过混凝的钻井废水的可生化性很差,不适用于生物法处理,而经光催化氧化预处理后,使其可生化性明显得到提高,经摇瓶实验处理后,其出水CODCr最小可达118 mg/L,达到GB 8978—1996二级标准;3种可生化性测试方法相比较表明,呼吸速率法更值得推广。

The bio-treatment of wastewater has the advantage of low cost,while the test results are satisfactory.Nonetheless,the bio-treatment of drilling fluid wastewater having a high salinity,high COD number,low BOD number have seldom been reported.Laboratory experiments have been done on the measuring of the bio-treatment feasibility of flocculated drilling wastewater before and after being oxygenated by photocatalysis,using three test methods,which are BOD/COD ratio method,breathing rate method,and shake flask method.Experimental results showed that the original flocculated drilling wastewater has a very poor bio-treatbility,while the wastewater after being oxygenated by photocatalysis has a very good bio-treatbility.Shake flask study showed that the effluent water has a minimum CODCr number of 118 mg/L,and meet the requirement of the GB 8978—1996 standard.Comparison of the three measuring methods showed that the breathing rate method gives birth to a better result.