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首页> 外文期刊>Environmental Science & Technology >Evaluation of a Pilot Anaerobic Secondary Effluent for Potable Reuse: Impact of Different Disinfection Schemes on Organic Fouling of RO Membranes and DBP Formation
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Evaluation of a Pilot Anaerobic Secondary Effluent for Potable Reuse: Impact of Different Disinfection Schemes on Organic Fouling of RO Membranes and DBP Formation

机译：厌氧性二次试验废水可重复使用的评估：不同消毒方案对反渗透膜有机污染和DBP形成的影响

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Anaerobic biological secondary treatment has the potential to substantially reduce the energy cost and footprint of wastewater treatment. However, for utilities seeking to meet future water demand through potable reuse, the compatibility of anaerobically treated secondary effluent with potable reuse trains has not been evaluated. This study characterized the effects of different combinations of chloramines, ozone, and biological activated carbon (BAC), applied as pretreatments to mitigate organic chemical fouling of reverse osmosis (RO) membranes, and the production of 43 disinfection byproducts (DBPs). The study employed effluent from a pilot-scale anaerobic reactor and soluble microbial products (SMPs) generated from a synthetic wastewater. Ozonation alone minimized RO flux decline by rendering the dissolved organic carbon (DOC) more hydrophilic. When combined with chloramination, ozone addition after chloramines maintained a higher RO flux. BAC treatment was ineffective for reducing the pressure and energy requirements for a set permeate flux. Regardless of pretreatment method prior to RO, the total DBP concentrations were 14 mu g/L upstream of RO. After treatment by RO, the UV/hydrogen peroxide advanced oxidation process, and chloramination, the total DBP concentrations were = 5 mu g/L. When DBP concentrations were weighted by metrics of toxic potency, the total DBP calculated toxicity was 4-fold lower than observed previously in full-scale potable reuse facilities receiving aerobically treated secondary effluent. The RO fouling and DBP formation behavior of anaerobic SMPs were similar to that of the pilot-scale anaerobic effluent. The results of this study are promising, but more research is needed to evaluate whether anaerobic effluent is suitable as an influent to potable reuse trains.
机译：厌氧生物二级处理具有显着降低能源成本和废水处理足迹的潜力。但是，对于寻求通过饮用水再利用来满足未来水需求的公用事业，尚未评估经过厌氧处理的二次废水与饮用水再利用系列的兼容性。这项研究表征了氯胺，臭氧和生物活性炭（BAC）的不同组合的作用，这些预处理被用作减轻反渗透（RO）膜的有机化学结垢的预处理方法，并产生了43种消毒副产物（DBP）。该研究采用了中试厌氧反应器的废水和合成废水产生的可溶性微生物产物（SMP）。单独的臭氧化通过使溶解的有机碳（DOC）更亲水，最大程度地降低了RO通量的下降。当与氯化作用结合使用时，在氯胺之后加入臭氧可保持较高的RO通量。 BAC处理无法有效降低设定渗透通量的压力和能量需求。无论在RO之前进行何种预处理方法，总DBP浓度均在RO上游<14μg / L。经反渗透处理后，紫外线/过氧化氢进行了进一步的氧化过程，并进行了氯化，总DBP浓度<= 5μg / L。当通过毒性效力的指标对DBP浓度进行加权时，DBP计算出的总毒性比在接受需氧处理的二次废水的全尺寸便携式重复使用设施中观察到的毒性低4倍。厌氧SMP的RO结垢和DBP形成行为与中试规模厌氧废水相似。这项研究的结果是有希望的，但是还需要更多的研究来评估厌氧废水是否适合作为可重复使用的饮用水的进水。

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  • 来源
    《Environmental Science & Technology》 |2019年第6期|3166-3176|共11页
  • 作者

    Szczuka Aleksandra; Berglund-Brown Juliana P.; Chen Hannah K.; Quay Amanda N.; Mitch William A.;

  • 作者单位

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

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

    Stanford Univ, Dept Civil & Environm Engn, 473 Via Ortega, Stanford, CA 94305 USA;

    Stanford Univ, Dept Civil & Environm Engn, 473 Via Ortega, Stanford, CA 94305 USA;

    Stanford Univ, Dept Civil & Environm Engn, 473 Via Ortega, Stanford, CA 94305 USA|Natl Sci Fdn Engn Res Ctr Reinventing Nat Urban W, 473 Via Ortega, 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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