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首页> 外文期刊>International Journal of Environmental Research and Public Health >Enhancement of COD Removal from Oilfield Produced Wastewater by Combination of Advanced Oxidation, Adsorption and Ultrafiltration
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Enhancement of COD Removal from Oilfield Produced Wastewater by Combination of Advanced Oxidation, Adsorption and Ultrafiltration

机译：结合先进的氧化，吸附和超滤技术，提高油田生产废水的化学需氧量去除率

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摘要

The wastewater produced from the oilfield is chemically corrosive due to high salinity in combination with high temperatures. It is also rich in contaminants, such as oil, polyacrylamide, emulsions, suspended solid, etc. The density difference between the oil and water in the wastewater is low, which makes separation via gravity difficult. In this study, a combined pilot treatment is studied, which includes Fenton oxidation, settlement, activated carbon adsorption, and ultrafiltration (UF). The operational conditions of Fenton oxidation are optimized based on alleviating the fouling of the UF membrane. When the Fenton oxidation was operated at the molar ratio of H 2 O 2 to FeSO 4 3:1 and pH 2.2–2.5, the UF membrane could operate continuously for 20 h without cleaning. The membrane was fouled by the organics (oil/grease) and polymer, which can be effectively removed by composite cleaning reagent consisting of 0.1% NaOH and 0.1% sodium dodecylbenzenesulfonate (SDBS). With the UF treatment, the chemical oxygen demand (COD) of the effluent was less than 50 mg/L, which could meet the upgraded standard.
机译：由于高盐度和高温，从油田产生的废水具有化学腐蚀性。它还富含污染物，例如油，聚丙烯酰胺，乳液，悬浮固体等。废水中油和水之间的密度差很低，这使得通过重力分离变得困难。在这项研究中，研究了一种联合的中试处理方法，包括芬顿氧化，沉降，活性炭吸附和超滤（UF）。 Fenton氧化的操作条件是基于减轻UF膜的结垢而优化的。当Fenton氧化在H 2 O 2与FeSO 4的摩尔比为3：1和pH为2.2-2.5的条件下进行时，超滤膜无需清洗即可连续运行20 h。膜被有机物（油/油脂）和聚合物污染，可以通过由0.1％NaOH和0.1％十二烷基苯磺酸钠（SDBS）组成的复合清洁剂有效去除。通过超滤处理，出水的化学需氧量（COD）小于50 mg / L，可以满足升级后的标准。

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