| 渗滤液反渗透浓缩液回灌出水水质变化规律的研究 |
| 摘要点击 1550 全文点击 1267 投稿时间：2013-11-04 修订日期：2014-01-04 |
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| 中文关键词 渗滤液 反渗透浓缩液 回灌 水质 填埋体 |
| 英文关键词 leachate reverse osmosis concentrate recirculation water quality landfill |
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| 中文摘要 |
| 为更科学合理地选择回灌填埋体提供一定的理论依据，对3个不同年份垃圾柱的回灌出水进行了水质变化规律的研究. 采用成都某垃圾填埋场的渗滤液反渗透浓缩液，对装填了填埋龄为1、5和15 a垃圾的垃圾柱开展了回灌实验，研究了回灌出水中酸碱度、总有机碳、氨氮、硝态氮、重金属的变化规律. 结果表明，1 a垃圾柱处于产甲烷化阶段，具有较好的去除硝态氮的能力， 硝态氮的降解率达到了88%以上，但出水有机物、氨氮浓度较高，对指标的改变主要通过生物作用； 5 a垃圾柱已接近稳定化，但还没有矿化垃圾的典型特征，吸附能力与生物作用均较差，对有机物、盐分、Cr、Ni的削减能力较小； 15 a柱具有较好的吸附能力和络合能力，对有机物、盐分、Cr、Ni具有较好的削减能力，初期的去除率分别达到了90%、78%、93%、74%，但随着回灌进行会接近或达到吸附容量，需要控制回灌过程和进度. |
| 英文摘要 |
| To provide certain theoretical basis for selecting recirculation landfill scientifically and reasonably, the variation regularity of recirculation effluent from the landfill columns in three different years was studied. By using leachate reverse osmosis concentrate from a refuse landfill in Chengdu, the recirculation experiments were carried out in three landfill columns filled with garbage in 1, 5 and 15 landfill ages respectively. The variation regularity of pH, total organic carbon, ammonia nitrogen, nitrate nitrogen and heavy metals of recirculation effluent was researched. It showed that the one-year landfill column with a favorable ability of removing nitrate nitrogen and degradation rate of nitrate nitrogen reaching above 88% was in the stage of producing methanation, but the concentration of organic matter and ammonia nitrogen of the effluent is higher and changes in the parameters mainly depend on the biological function. The five-year landfill column without typical features of mineralized refuse and with relatively poor adsorption capacity and biological effects, as well as removal capacity of organic matter, salinity, Cr and Ni approaches stabilization. The fifteen-year landfill column has high capability of adsorption, complexing, as well as organic matter, salinity, Cr and Ni removal, and the removal rate at the initial stage reaches 90%, 78%, 93% and 78%, respectively, but the recirculation process and progress need to be controlled when the rate approaches or reaches the adsorption capacity. |
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