Division of Environmental Science & Technology, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, P. R. China.
Water Environ Res. 2011 Dec;83(12):2140-7. doi: 10.2175/106143011x12928814445014.
A novel process, enhanced direct injection-well recharge system (EnDir), can overcome the technical difficulties during the application of conventional surface spreading and has been developed to recharge groundwater with reclaimed water. In this study, removal and transformation of dissolved organic matter (DOM) in the system were investigated in laboratory-scale experiments. Results demonstrated that dissolved organic carbon and trihalomethane formation potential values could be reduced from 6.54 +/- 1.30 mg/L and 267.9 +/- 24.3 microg/L to 1.59 +/- 0.64 mg/L and 104.5 +/- 10.2 microg/L, respectively, as a result of DOM biodegradation in the aerobic short-term vadose soil treatment. Fluorescence spectra showed that aromatic protein-like substances and soluble microbial byproducts could be removed, to a great extent, in the soil system. Despite different removal efficiencies of DOM in different molecular weight fractions, the residual DOM was composed mainly of fulvic acid-like and humic acid-like substances, with molecular weights of 500 Da to 1 kDa.
一种新的工艺，增强型直接注入井补给系统（EnDir），可以克服常规表面扩散应用中的技术难题，已被开发用于用再生水补给地下水。本研究在实验室规模实验中研究了系统中溶解有机物（DOM）的去除和转化。结果表明，溶解有机碳和三卤甲烷生成潜能值可分别从 6.54±1.30mg/L 和 267.9±24.3μg/L 降低至 1.59±0.64mg/L 和 104.5±10.2μg/L，这是由于好氧短期包气带土壤处理中 DOM 的生物降解。荧光光谱表明，芳香蛋白类物质和可溶微生物副产物可以在土壤系统中被大量去除。尽管不同分子量分数的 DOM 的去除效率不同，但残留的 DOM 主要由分子量为 500Da 至 1kDa 的富里酸类和腐殖酸类物质组成。
