陈垃圾反应床＋芦苇人工湿地处理垃圾渗滤液
Treatment of landfill leachate by aged refuse bioreactor and reeds wetland
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摘要: 研究了陈垃圾反应床与芦苇人工湿地串联对垃圾渗滤液中污染物的去除效果， 并探讨了湿地中芦苇生长和对渗滤液中总氮的吸收能力。结果表明： 在进水负荷为0.1 m3/（m2·d）的条件下，经过3个月的运行，陈垃圾反应床与芦苇人工湿地对陈年渗滤液中COD、氨氮、总氮及总磷的最大去除率分别达到90.3%、95.0%、79.3%和99.8%。通过对人工湿地中芦苇的分析表明，芦苇在6—8月份生长迅速，地上部分生物量与其氮含量增加较快，最大值均出现在8月底，植株总含氮量可以达到28.5 g/m2。此时收割芦苇可从湿地中最大限度除氮。如能增加芦苇种植密度，陈垃圾床与芦苇湿地串联处理渗滤液污染物以及深度去氮是可行的。Abstract: The removal efficiency of pollutants in reeds wetland and aged refuse bioreactor was studied， and the growth and TN absorptivity of the reeds were explored . The results showed that under the hydraulic loading rate of 0.1 m3 /(m2·d）， the highest removal rates of COD， NH+4-N， TN and TP in aged leachate were 90.3%，94.5%，79.3% and 99.8%， respectively after three months running. Through the analysis of reed in wetland， the reeds grew rapidly from June to August， the biomass and total nitrogen (TN) content in aboveground parts of reeds increased rapidly， both the maximum had occurred in later August. The total nitrogen content of plant could reach 28.5 g/m2. It can remove total nitrogen most greatly by harvesting reeds at this time. If increase the reed planting density， it is feasible to treat pollutants of landfill leachate and remove nitrogen deeply by the reeds wetland and aged refuse bioreactor.
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Key words:
- aged refuse bioreactor /
- reed wetland /
- landfill leachate /
- total nitrogen /
- removal efficiency
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