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首页> 外文期刊>Environmental Science & Technology >Evaluation of Enhanced Ozone-Biologically Active Filtration Treatment for the Removal of 1,4-Dioxane and Disinfection Byproduct Precursors from Wastewater Effluent
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Evaluation of Enhanced Ozone-Biologically Active Filtration Treatment for the Removal of 1,4-Dioxane and Disinfection Byproduct Precursors from Wastewater Effluent

机译：增强的臭氧-生物活性过滤技术对废水中1,4-二恶烷和消毒副产物前驱物去除的评价

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Ozonation followed by biologically active filtration (BAF) (O-3-BAF) treatment has become an alternative to reverse osmosis in potable wastewater reuse applications because of the ability to produce a high-quality effluent while reducing brine production and disposal. In this study, effluent from a sequencing batch membrane bioreactor (SBMBR) was treated by O-3-BAF at three specific ozone doses (0.5, 0.7, and 1.0 mg O-3/mg DOC) and different empty bed contact times (EBCTs; 15-45 min). The reaction of O-3 with granular activated carbon (GAC) (O-3/GAC) to promote the formation of hydroxyl radicals (OH) was evaluated at 1.0 mg O-3/mg DOC followed by BAF at 15-45 min EBCT. The efficacy of these techniques was compared for the removal of O-3 refractory 1,4-dioxane and the reduction in the formation of bromate, 35 regulated and unregulated halogenated disinfection byproducts (DBPs), and 8 N-nitrosamines after chloramination. Conventional ozonation (without the presence of GAC during ozonation) removed 6-11% of 1,4-dioxane, while BAF increased the removal to similar to 25%. O-3/GAC improved the removal of 1,4-dioxane to similar to 40%, while BAF increased the removal to similar to 50%. No bromate was detected during conventional ozonation. Although O-3/GAC formed 12.5 mu g/L bromate, this concentration was reduced during BAF treatment to 6.8 mu g/L. Even though conventional ozonation was more effective than O-3/GAC for the reduction in chloramine-reactive N-nitrosodimethylamine (NDMA) precursors, BAF treatment after either conventional or enhanced ozonation reduced NDMA formation during chloramination to 10 ng/L. O-3/GAC was more effective at reducing halogenated DBP formation during postchloramination. Regardless, the reduction in halogenated DBP formation during postchloramination achieved by BAF treatment was similar to 90% relative to the formation in the SBMBR effluent after either conventional or enhanced ozonation. The reduction of haloacetic acid (HAA) formation improved moderately with increasing BAF EBCT. Both O-3-BAF and (O-3/GAC) BAF met regulatory levels for trihalomethanes, HAAs, NDMA, and bromate.
机译：臭氧处理后再进行生物活性过滤（BAF）（O-3-BAF）处理已成为饮用水回用应用中反渗透的替代方法，因为它能够产生高质量的废水，同时减少盐水的生产和处置。在这项研究中，通过O-3-BAF以三种特定的臭氧剂量（0.5、0.7和1.0 mg O-3 / mg DOC）和不同的空床接触时间（EBCT）处理了测序批量膜生物反应器（SBMBR）的出水。 ; 15-45分钟）。以1.0 mg O-3 / mg DOC评估O-3与颗粒状活性炭（GAC）（O-3 / GAC）促进羟基自由基（OH）形成的反应，然后在15-45分钟EBCT评估BAF 。比较了这些技术在去除O-3难处理的1,4-二恶烷和减少溴酸盐，35种受管制和不受管制的卤化消毒副产物（DBP）以及8种氯化亚胺后的N-亚硝胺形成方面的功效。常规臭氧化（在臭氧化过程中不存在GAC）可去除6-11％的1,4-二恶烷，而BAF可将去除率提高至约25％。 O-3 / GAC将1,4-二恶烷的去除率提高至约40％，而BAF将其去除率提高至约50％。在常规臭氧化过程中未检测到溴酸盐。尽管O-3 / GAC形成了12.5μg / L的溴酸盐，但在BAF处理过程中该浓度降低至<6.8μg / L。尽管常规臭氧化在减少氯胺反应性N-亚硝基二甲基胺（NDMA）前体方面比O-3 / GAC更为有效，但常规臭氧化或增强臭氧化后的BAF处理可将氯化过程中NDMA的生成量降低至<10 ng / L。 O-3 / GAC可以更有效地减少后氯化过程中卤代DBP的形成。无论如何，相对于常规或增强臭氧处理后SBMBR废水中的形成，通过BAF处理实现的后氯化过程中卤代DBP形成的减少量约为90％。随着BAF EBCT的增加，卤代乙酸（HAA）形成的减少有所改善。 O-3-BAF和（O-3 / GAC）BAF均符合三卤甲烷，HAAs，NDMA和溴酸盐的监管水平。

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  • 来源
    《Environmental Science & Technology》 |2019年第5期|2720-2730|共11页
  • 作者

    Vatankhah Hooman; Szczuka Aleksandra; Mitch William A.; Almaraz Nohemi; Brannum Jacob; Bellona Christopher;

  • 作者单位

    Colorado Sch Mines, Dept Civil & Environm Engn, 1500 Illinois St, Golden, CO 80401 USA|Natl Sci Fdn Engn Res Ctr Reinventing Nations Urb, Stanford, CA 94305 USA;

    Stanford Univ, Dept Civil & Environm Engn, 473 Via Ortega, Stanford, CA 94305 USA|Natl Sci Fdn Engn Res Ctr Reinventing Nations Urb, Stanford, CA 94305 USA;

    Stanford Univ, Dept Civil & Environm Engn, 473 Via Ortega, Stanford, CA 94305 USA|Natl Sci Fdn Engn Res Ctr Reinventing Nations Urb, Stanford, CA 94305 USA;

    Colorado Sch Mines, Dept Civil & Environm Engn, 1500 Illinois St, Golden, CO 80401 USA;

    Colorado Sch Mines, Dept Civil & Environm Engn, 1500 Illinois St, Golden, CO 80401 USA|Natl Sci Fdn Engn Res Ctr Reinventing Nations Urb, Stanford, CA 94305 USA;

    Colorado Sch Mines, Dept Civil & Environm Engn, 1500 Illinois St, Golden, CO 80401 USA|Natl Sci Fdn Engn Res Ctr Reinventing Nations Urb, Stanford, CA 94305 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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