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首页> 外文期刊>Ozone: Science & Engineering: The Journal of the International Ozone Association >The Role of Soil Aquifer Treatment (SAT) for Effective Removal of Organic Matter, Trace Organic Compounds and Microorganisms from Secondary Effluents Pre-Treated by Ozone
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The Role of Soil Aquifer Treatment (SAT) for Effective Removal of Organic Matter, Trace Organic Compounds and Microorganisms from Secondary Effluents Pre-Treated by Ozone

机译：土壤含水层治疗（SAT）的作用是有效去除有机物，缺失处理的二级废水中的有机质，痕量有机化合物和微生物

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Soil aquifer treatment (SAT) is an effective natural and economically feasible tertiary treatment for wastewater reuse. An innovative hybrid process based on biofiltration, ozonation and short SAT (sSAT, with similar to 22 days retention time) was demonstrated in a 6 m(3)/hr pilot system to remove emerging trace organic compounds (TrOCs), organic matter and control Mn2+ dissolution in reclaimed water. The biofiltration stage was proposed for nitrification of ammonia as well as removal of dissolved and particulate organic matter (DOM and POM), to enable efficient ozonation of secondary effluents. The pilot system was operated in two modes, where samples were periodically taken from all pilot stages to observe changes in product water quality. At first (Mode 1), biofiltered effluents were infiltrated through sSAT (i.e., no ozonation prior infiltration). During this operation, ammonia, nitrite and phosphate were completely removed, and pathogens were highly reduced. In addition, all measured TrOCs were effectively removed after sSAT, besides the persistent TrOCs Carbamazepine (CBZ) and Iodine-organic contrast media Iopamidol (IPDL). In Mode 2, biofiltered and ozonated (1.0-1.2 mg ozone/mg DOC) effluents were infiltrated through sSAT. In the final reclaimed product, values of DOC, UVA and Mn2+ were reduced to 0.8 mg/L, 2.2 L/m, and 29-35 mu g/L, respectively. Furthermore, ammonia and nitritewere not detected in the product, and good bacterial quality was obtained. Following 56-75 days of operation at Mode 2, all TrOCs were reduced down to <100 ng/L. The delay in the effect of the pretreatment stages on TrOCs removal by sSAT (>56 days instead of similar to 22 days) could be explained by their displacement retardation in the upper soil layers of the pilot SAT (0-25 cm). In-depth sampling inbservation well and positively affected the quality of the reclaimed water. the observation well after 111 days atMode 2 showed homogeneity along the overall perforated section of the well (from -14 to -26 m) with 0.7-0.9 mg/L DOC, 2.1-2.2 1/m UVA and <10 ng/L CBZ. This result proved that the ozonated water completely covered the area around the observation well and positively affected the quality of the reclaimed water.
机译：土壤含水层治疗（SAT）是对废水再利用的有效和经济可行的三级处理。在6米（3）/ HR试点系统中，证明了一种基于生物滤膜，臭氧化和短六个（SSAT的SSAT，与22天保留时间相似的SSAT）进行创新的混合过程，以除去新出现的痕量有机化合物（TROC），有机物和对照再生水中的Mn2 +溶解。提出了生物滤光阶段，用于硝化氨，除去溶解和颗粒状有机物质（DOM和POM），以实现二级流出物的有效臭氧化。试点系统以两种模式操作，其中定期从所有导频阶段采用样品以观察产品水质的变化。首先（模式1），通过SSAT（即，未见渗透的臭氧化）渗透生物过滤的流出物。在该操作期间，完全除去氨，亚硝酸盐和磷酸盐，并且高度降低病原体。此外，除了持久性的TROCs carbamazepine（CBZ）和碘 - 有机造影剂IOPamidol（IPD1）之外，SSAT之后，所有测量的TROC都会有效地除去。在模式2中，通过SSAT渗透生物过滤和臭氧（1.0-1.2mg臭氧/ mg DOC）流出物。在最终再生产物中，DOC，UVA和MN2 +的值分别降低至0.8mg / L，2.2L / m和29-35μg/ L.此外，在产品中未检测到氨和亚硝酸盐，并获得良好的细菌质量。在MODE 2的运行56-75天后，将所有TROC减少到<100 ng / L.通过SSAT（> 56天而不是22天）的TROC对TROC的预处理阶段的效果的延迟可以通过它们的前水饱和（0-25cm）的上层土壤层中的位移延迟来解释。深入抽样的入口，积极影响再生水的质量。在111天静脉2后的观察结果显示沿井的整个穿孔部分（从-14至-26米）的均匀性，0.7-0.9 mg / L doc，2.1-2.2 1 / m UVA和<10ng / L CBZ 。结果证明，臭氧水完全覆盖了观察范围内的区域，积极影响了再生水的质量。

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