八种不同工艺组合人工湿地系统除磷效果研究

传统的人工湿地系统除磷效能的提高方式主要集中在基质填料的选择、湿地植物的筛选等方面，本试验从调整湿地的组合工艺着手探索提高磷去除效率的优化组合，在为期两年的研究中考察了推流床-下行流-上行流、下行流-上行流-推流床、好氧塘-下行流、下行流-兼性塘、推流床-下行流、下行流-上行流、推流床等8种不同工艺组合人工湿地系统对富营养化湖泊水体中磷的去除规律，比较了这些湿地组合所构建的生物学效应。试验结果显示，如果采用塘系统作组合单元在湿地系统中前置比较理想，而在不同的季节，不同水力负荷下的冲击试验结果表明，复合垂直流湿地系统可以常年保持稳定的、较高的磷去除能力，而且对水力变化具有更好的耐受性能。复合垂直流湿地作为一种新型的人工湿地系统工艺组合具有较好的理论价值和应用前景.

ON PHOSPHORUS REMOVAL EFFICIENCY IN EIGHT KINDS OF DIFFERENT COMBINATION SYSTEMS OF WETLAND

Traditional methods for the enhancement of phosphorus removal efficiency in wastewater often concentrated on the selection of substrates and wetland plant species.In this research,another method by adjusting the process of combination of wetland to improve phosphorus removal efficiency were tested.The author compared the removal efficiency of phosphorus in eutrophic lake water in eight different combination systems,including plug-flow-down-flow-up flow wetland,down-flow-up-flow-plug-flow wetland,oxidation pond-down-flow,down-flow-pond,plug-flow constructed wetland in two-year inspection.It was indicated that the pond process could not be installed as the end process.The results also showed that the process of down-flow combined with up-flow wetland was better than other kind of combined process in cold and warm weather,the endurance of this kind of combination to high hydraulic loading was also more preferable than others.That is to say,the down-flow-up-flow process was an ideal combined wetland process in treating wastewater.This kind of novel constructed wetland should be well used in the purification of eutrophic water.