本研究的范围是调查饮用水中的天然有机物（NOM）和废水处理过程中产生的可溶性微生物产物（SMP）如何在水回用系统的TOC上刻下它们的特征。水源TOC越高，再生水TOC越高。与地表水水源的饮用水相比，再生水有机物的分子量较低，芳香性略高，脂肪族较少。虽然废水处理过程中产生的可溶性微生物产物（SMPs）会增加再生水中的残余有机碳浓度，但根据XAD-8和XAD-4分级结果，有机物的性质没有改变。饮用水和再生水13C的相似性- 核磁共振谱表明，分离物的结构和组成以NOM为主。由于再生水中的TOC主要由NOM主导，这可能取决于当地水源的情况，法规应考虑当地的饮用水浓度。

The scope of this study was to investigate how natural organic matter (NOM) from drinking water and soluble microbial products (SMP) generated during wastewater treatment engrave their character on TOC in water reuse systems. Higher source water TOC clearly correlated with higher reclaimed water TOC. Reclaimed water organic matter was lower in molecular weight and was only slightly more aromatic and less aliphatic as compared to drinking water from surface water sources. Although, residual organic carbon concentrations in reclaimed water are increased by soluble microbial products (SMPs) derived in the wastewater treatment process, the character of organic matter did not change according to XAD-8 and XAD-4 fractionation results. The similarity of drinking water and reclaimed water 13C-NMR spectra indicated that structure and composition of the isolates are dominated by NOM. Since TOC in reclaimed water is dominated by NOM which might vary depending on local source water situations, regulations should consider local drinking water concentrations.