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首页> 外文会议>International Conference on Sustainable Energy and Environmental Engineering >Treatment of drilling wastewater in oilfield by coagulation/iron chipping micro-electrolysis two process
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Treatment of drilling wastewater in oilfield by coagulation/iron chipping micro-electrolysis two process

机译：用凝固/铁切削微电解处理油田钻井废水两种过程

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The coagulation/iron chipping micro-electrolysis process was used to treat drilling wastewater.A new method of the depth removal of COD_(Cr) in wastewater from petroleum drilling was put forward. The effects on the reaction were investigated by single factor tests. The optimal conditions of the treatment are given as follows: weight ratio of iron chipping to reactive carbon 0.5, pH1.0, reaction time 2 hours, normal atmospheric temperature, after reacting the pH in solution being adjusted to be 11 by lime milk. The experimental results showed that following chemical coagulation/micro-electrolysis process, the removal rate of chromaticity is 100%, COD_(Cr) could be reduced to less than 150mg/L and the treated wastewater can come to the first and the second discharge standard of state comprehensive discharge criteria GB8978-1996. The analytic result shows that lixivium from solidified sludge cake of per unit operation comply with the second kind of general industrial sold of state standard for pollution control on the storage and disposal site for general industrial sold, GB18599-2001. The drilling wastewater generated during the oil/gas field exploration is a special kind of high concentration organic wastewater, which is a complex, deep colored, strong toxic matter with high content of dissolved organics. Until now the effective methods for the remediation of drilling wastewater [3-8] could be seen as follow: dissolved air flotation, coagulation/oxidation, activated carbon adsorption, biological/coagulation and secondary coagulation. The above methods require large investment in equipment and high operating costs, while treatment effect (COD_(Cr) excessive) is far from satisfactory. So developing effective treatment with low running costs and investment is still urgently needed for oilfield environmental workers. Considering the chemical and electrochemical action [9], such as electrochemical attached, redox, physical adsorption and flocculation and sedimentation, industrial solid wastes which were treated with chemical coagulation technology in advance [10] are used to deal with the wastewater COD_(Cr). And experimental results are satisfying.
机译：凝固/铁屑微电解方法用于从石油钻井废水中的深度除去COD_（Cr）构成的对待钻孔wastewater.A新方法提出。通过单因素试验对反应的影响。治疗的最佳条件如下给出：铁屑到反应性碳0.5，pH1.0，反应时间为2小时，常温的重量比，被调整在溶液pH值反应之后为11由石灰乳。实验结果表明，下述化学凝聚/微电解过程中，色度的去除率为100％，COD_（Cr）为可减少到小于150毫克/ L和处理后的废水可以来在第一和第二排放标准的状态综合排放标准GB8978-1996。解析结果显示，从每个单元操作的凝固污泥饼浸出液遵守第二类一般工业的出售状态的标准对污染控制在储存和处置场一般工业出售，GB18599-2001。油/气田勘探过程中产生的废水钻孔是一种特殊的高浓度有机废水，这是一个复杂的，深着色，强毒性与溶解的有机物的含量高的物质。直到现在用于钻井废水[3-8]的补救的有效方法可以被看作是如下：溶气浮选，凝结/氧化，活性炭吸附，生物/凝血和二次凝结。上述方法需要在设备和运行费用高投资大，而治疗效果（COD_（Cr）的过度）是远不能令人满意。因此，开发具有运行成本低，投资有效的治疗方法仍然是迫切需要油田环保工作者。考虑到化学和电化学作用[9]，如电化学附着，氧化还原，物理吸附和絮凝沉淀，将其用化学凝聚技术预先处理过的工业固体废物[10]用于处理废水COD_（Cr）的。和实验结果令人满意。

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