Xuan Zhao, Xuzhou Cheng, Meng Zhang
Division of Environmental Sci & Tech, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China.
Water Sci Technol. 2009;60(3):745-9. doi: 10.2166/wst.2009.438.
A new kind of artificial groundwater recharge approach named enhanced direct injection-well recharge (EnDir), consisting of short-term artifical vadose treatment and long-term aquifer treatment, is put forward and demonstrated in Beijing. The results reveal that granular activated carbon (GAC) could remove bulk organic matters with the DOC value decrease from 6.0 mg/L to 4.6 mg/L. The short-term vadose treatment of EnDir exhibited additional organic carbon removal and effective nitrification. DOC and AOX values were reduced to 4.1 mg/L and 56.8 microg/L respectively. Ammonia-N of 3.81 mg/L was converted into equivalent nitrate-N. The long-term aquifer treatment offers favorable denitrification and lower nitrate-N content in the aquifer. The bulk parameters of DOC, SUVA, AOX and ammonia-N detected in the monitoring wells are as the same level as that of local groundwater. Brief financial analysis demonstrated the promising economic aspects of EnDir system in Beijing.
一种名为强化直接注入式回灌（EnDir）的新型人工地下水回灌方法被提出并在北京进行了示范，该方法由短期人工渗流处理和长期含水层处理组成。结果表明，颗粒活性炭（GAC）能够去除大量有机物，溶解性有机碳（DOC）值从6.0毫克/升降至4.6毫克/升。EnDir的短期渗流处理表现出额外的有机碳去除和有效的硝化作用。DOC和可吸附有机卤化物（AOX）值分别降至4.1毫克/升和56.8微克/升。3.81毫克/升的氨氮转化为等量的硝酸盐氮。长期含水层处理提供了良好的反硝化作用，并降低了含水层中硝酸盐氮的含量。监测井中检测到的DOC、比紫外吸光值（SUVA）、AOX和氨氮的总体参数与当地地下水处于同一水平。简要的财务分析表明，EnDir系统在北京具有良好的经济前景。
