As water reuse development has increased, biological stability issues associated with reclaimed water have gained attention. This study evaluated assimilable organic carbon (AOC) in effluents from a full-scale membrane biological reactor (MBR) plant and found that they were generally stable over one year (125-216 µg/L), with slight increases in warmer seasons. After additional tertiary treatments, the largest increases in absolute and specific AOCs were detected during ozonation, followed by coagulation-ozonation and coagulation. Moreover, UV₂₅₄ absorbance is known to be an effective surrogate to predict the AOC changes during ozonation. Applying coagulation prior to ozonation of MBR effluents for removal of large molecules was found to reduce the AOC formation compared with ozonation treatment alone. Finally, the results revealed that attention should be paid to seasonal variations in influent and organic fraction changes during treatment to enable sustainable water reuse.

随着水回用发展的增加，与再生水有关的生物稳定性问题已引起关注。这项研究评估了全尺寸膜生物反应器（MBR）厂废水中的可吸收有机碳（AOC），发现它们通常在一年内保持稳定（125-216 µg / L），而暖季则略有增加。经过额外的第三次处理后，在臭氧化过程中检测到绝对和特定AOC的增加最大，然后进行混凝-臭氧化和混凝。此外，UV ₂₅₄吸光度是预测臭氧化过程中AOC变化的有效替代方法。与仅进行臭氧处理相比，在将MBR废水进行臭氧处理之前进行凝结以去除大分子的方法可减少AOC的形成。最后，结果表明应注意处理过程中进水和有机物组分变化的季节性变化，以实现可持续的水再利用。