研究了复合强化净化生态浮床[黄菖蒲(Iris pseudacorus)+组合填料+三角帆蚌(Hyriopsis cumingii)]和传统生态浮床(仅种植黄菖蒲)对污水中N、P的去除效果.结果表明,三角帆蚌和填料附着微生物与浮床植物间存在颉颃作用,植物生长受到限制；处理30 d,复合强化净化生态浮床使污水中p(TN)和p(TP)分别由9.23和2.16mg·L-1降至0.59～ 1.32和0.83～ 1.20 mg·L-1,去除率分别达到85.70％～93.61％和44.44％ ～ 61.57％,比传统生态浮床平均提高19.86和17.90百分点,最高达24.05和24.53百分点,并且随着时间的推移,去除率保持在更稳定状态；三角帆蚌投放密度宜控制在15 ～ 28个·m-3之间,此时复合强化净化生态浮床系统具有最佳复氧和N、P去除效果.%A study was conducted to compare composite enhanced water-purifying ecological floating-beds (CEPEF,lris pseudacorus + composite packing + Hyriopsis cumingii) with traditional ecological floating-bed (only I.pseudacorus) in effect of removing N and P in wastewater.Results show that antagonism existed between H.cumingii and microbes attached to the packing on one side and floating-bed plants on the other,which limited the growth of the plants on the floating-bed.After 30 days of treatment with the CEPEF,the concentration of total nitrogen (TN) and total phosphorus (TP) were reduced from 9.23 and 2.16 mg · L-1 to 0.59-1.32 and 0.83-1.20 mg · L-1,respectively,with their respective removal rate reaching 85.70％-93.61％ and 44.44％-61.57％,which were averagely 19.86 and 17.90 percentage point higher than that with the traditional one (with the highest being 24.05 and 24.53 percentage point),respectively.And the effect was quite stable with the time passing on.Meanwhile,it was also found that the CEPEF peaked in its reoxygenation and N,P removal effects when the density of H.cumingii was controlled between 15 and 28 ind per cubic metre.
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