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为了识别再生水人工地下回灌过程中所去除溶解性有机物(DOM)的类型和含量,利用“臭氧+砂滤+井灌”的再生水回灌系统,进行DOM三维荧光光谱(three-dimen-sional excitation/emission matrix,3DEEM)分析。结果表明:臭氧和砂滤使再生水中腐殖质类有机物的荧光光谱峰强度显著降低;再生水进入含水层后,48.71%的DOM被氧化去除;沿含水层继续运移,逐渐转化为还原环境,厌氧微生物为了维持其新陈代谢活性,将大分子DOM厌氧转化为小分子DOM。利用臭氧氧化作用和含水层降解作用,可有效地去除再生水中DOM。
In order to identify the type and content of Dissolved Organic Matter (DOM) removed during artificial underground recharge of reclaimed water, the three-dimensional fluorescence spectroscopy (DOM) was performed using a reclaimed water recharge system of "ozone + sand filter + excitation / emission matrix, 3DEEM) analysis. The results showed that ozone and sand filtration significantly reduced the fluorescence intensity of the humic organics in the reclaimed water. After the reclaimed water entered the aquifer, 48.71% of the DOM was oxidized and removed, and then continued to migrate along the aquifer and gradually transformed into the reducing environment. Anaerobic In order to maintain its metabolic activity, microorganisms convert the macromolecular DOM into small molecule DOM. The use of ozone oxidation and aquifer degradation can effectively remove DOM from reclaimed water.