【摘要】 比较了由砾石、沸石和粉煤灰填料组成的三级人工湿地与单级砾石人工湿地净化富营养化景观水体的效果。结果表明,三级人工湿地能逐级去除景观水体中的有机物、氮和磷,同时减轻出水氨臭现象。与单级湿地相比,三级湿地具有较好的脱氮除磷效果,对TP和TN的去除率分别达到35. 1% ~65. 3%和 28. 7% ~62. 9%。两种湿地系统对COD的去除效果没有明显的区别(去除率分别为 36. 0% ~79. 8%和 40. 3% ~61. 9% ),对浊度、蓝绿藻均有较好的去除效果 (平均去除率分别达到 78%和 63%左右)。更多还原

【Abstract】 Three-stage wetland was constructed by gravel, zeolite, and coal ash, and the single stage wetland was constructed only by gravel. The two kinds of wetland were compared for purification efficiency of scenic waters. The comparison shows that the three stage constructed wetland is capable of removing by stages the organic matters, nitrogen and phosphorus from scenic waters, and meanwhile it can abate ammoniacal odor from the effluent. As compared with the single stage wetland, the three-stage wetland has favorite nitrogen and phosphorus removal effect with removal rate of 35.1%- 65.3% and (28.7)%- 62.9% respectively for TP and TN. The two kinds of wetland are less different in COD removal (removal rate is 36.0%- 79.8% and 40.3%- 61.9% respectively). They are efficient in removal of turbidity and blue-green algae (average removal rate is about 78% and 63% respectively).更多还原