Abstract Lipid degradation behavior was examined during the Intermittent Contact Oxidation Process (ICOP) for application in in-sewer purification. Lipids are known to accumulate in the sewer environment making the study of its degradation behavior relevant for in-sewer purification. Changes in the lipid substrate during various flow conditions and the subsequent effect of these transformation on the performance of a channel incorporating ICOP were focused on. Biomass was first developed for 84 days in three types of sponges. Oxygen consumption rates, indicative of aerobic lipid degradation, were then observed during three flow conditions which were: extended no flow condition, frequent flow condition, and a combination of extended no flow and frequent flow condition. Oxygen consumption rates decreased over time during extended no flow condition while they were generally similar during frequent flow condition for all sponge types. Lipid samples analyzed after treatment revealed that intermittent flow affected the composition of residual free fatty acid species. Overall, the study provides insights on the effect of flow intermittency on lipid degradation behavior during the application of the ICOP for in-sewer purification.

中文翻译：

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下水道内间歇接触氧化法净化过程中，流动间歇对脂质降解行为的影响

摘要 在用于下水道净化的间歇接触氧化过程 (ICOP) 期间检查了脂质降解行为。已知脂质会在下水道环境中积累，因此研究其降解行为与下水道内净化相关。在各种流动条件下脂质底物的变化以及这些转化对包含 ICOP 的通道性能的后续影响被关注。生物质最初在三种类型的海绵中开发了 84 天。然后在三种流动条件下观察氧消耗率，表明有氧脂质降解：延长无流动条件、频繁流动条件以及延长无流动和频繁流动条件的组合。在长时间无流动条件下，耗氧率随时间降低，而在所有海绵类型的频繁流动条件下，耗氧率通常相似。处理后分析的脂质样品表明，间歇性流动会影响残留游离脂肪酸种类的组成。总体而言，该研究提供了关于在 ICOP 用于下水道内净化期间流动间歇性对脂质降解行为的影响的见解。