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Optimization of a membrane cleaning strategy for advanced treatment of polymer flooding produced water by nanofiltration

机译：纳米滤灰提前治疗膜清洗策略的优化

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摘要

Recycling the polymer flooding produced water (PFPW) into polymer flooding oil extraction after advanced treatment by nanofiltration (NF) is a reasonable choice for the effective management of PFPW. However, membrane cleaning is indispensable because of the inevitable membrane fouling phenomenon. In this study, the NF process was illustrated to treat synthetic PFPW by taking anion polyacrylamide (APAM) and crude oil as target foulants, and during which membrane cleaning was investigated. Different cleaning agents were studied and used in combination. A single factor experiment and orthogonal experiment were conducted to optimize the cleaning strategy. Flux measurements, salt rejection experiments, AFM, a contact angle goniometer and ATR-FTIR were employed to evaluate the cleaning performance. The results indicate that the optimized alkaline formulated cleaning solution (pH = 11) consists of 0.05% EDTA, 0.2% sodium pyrophosphate and 0.2% SDS. The optimized cleaning strategy should include two steps: (i) the first step is to clean with the alkaline formulated cleaning agent for 0.5 h; (ii) the second step is to clean with a HCl solution (pH - 2) for 0.5 h. The optimized cleaning strategy can fully recover the membrane flux without damaging its other properties, including desalting ability, surface morphology, hydrophilicity and chemical bonds.
机译：通过纳米滤热（NF）先进的治疗后，将聚合物泛滥生产的水（PFPW）产生水（PFPW）是PFPW的有效管理的合理选择。然而，由于不可避免的膜污染现象，膜清洁是不可或缺的。在该研究中，说明NF方法通过将阴离子聚丙烯酰胺（APAM）和原油作为靶污垢来治疗合成PFPW，并且在此期间研究了膜清洁。研究并组合使用不同的清洁剂。进行单一因素实验和正交实验以优化清洁策略。使用助焊剂测量，盐排斥实验，AFM，接触角测筒仪和ATR-FTIR来评估清洁性能。结果表明，优化的碱配制清洁溶液（pH = 11）由0.05％EDTA，0.2％焦磷酸钠和0.2％SD组成。优化的清洁策略应包括两个步骤：（i）第一步是用碱配制清洁剂清洁0.5小时; （ii）第二步骤是用HCl溶液（pH-2）清洁0.5小时。优化的清洁策略可以完全恢复膜通量，而不会损坏其其他性质，包括脱盐能力，表面形态，亲水性和化学键。

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  • 来源
    《RSC Advances》 |2016年第34期|共10页
  • 作者

    Zhang Ruijun; Yu Shuili; Shi Wenxin; Tian Jiayu; Jin Limei; Zhang Bing; Li Li; Zhang Zhiqiang;

  • 作者单位

    Harbin Inst Technol Sch Municipal &

    Environm Engn State Key Lab Urban Water Resource &

    Environm Harbin 150090 Peoples R China;

    Harbin Inst Technol Sch Municipal &

    Environm Engn State Key Lab Urban Water Resource &

    Environm Harbin 150090 Peoples R China;

    Harbin Inst Technol Sch Municipal &

    Environm Engn State Key Lab Urban Water Resource &

    Environm Harbin 150090 Peoples R China;

    Harbin Inst Technol Sch Municipal &

    Environm Engn State Key Lab Urban Water Resource &

    Environm Harbin 150090 Peoples R China;

    Heilongjiang Bayi Agr Univ Coll Food Sci Daqing 163319 Peoples R China;

    Harbin Inst Technol Sch Municipal &

    Environm Engn State Key Lab Urban Water Resource &

    Environm Harbin 150090 Peoples R China;

    Harbin Inst Technol Sch Municipal &

    Environm Engn State Key Lab Urban Water Resource &

    Environm Harbin 150090 Peoples R China;

    Harbin Inst Technol Sch Municipal &

    Environm Engn State Key Lab Urban Water Resource &

    Environm Harbin 150090 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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