摘要
为了提高人工湿地对高盐有机废水的处理效果,针对人工湿地填料及植物问题,选用砂石、活性炭、沸石、锯木屑作为湿地填料,种植蜘蛛兰、芦苇、香根草、怪柳、花叶芦荻、水葱、风车草、白骨壤、秋茄、鸢尾、拉关木、纸莎草、千屈菜、海桑等14种湿地植物,考察垂直流人工湿地运行期间对危废尾水污染物的去除效率,并对填料配置及植物种类进行分析。结果表明:垂直流人工湿地对高盐废水中有机物、氮、磷等污染物均有一定的去除效果,筛选出芦苇、花叶芦荻和香根草长势最好,人工湿地对CODCr的去除能力大小排序为:活性炭>沸石>砂石>锯木屑;对NH3-N的去除能力大小排序为:沸石>活性炭>砂石>锯木屑;TP的去除能力大小排序为:沸石>砂石>活性炭>锯木屑。垂直流人工湿地填料从上到下填料结构为砂石层0.4 m、特殊填料层0.4 m、砂石层0.4 m、碎石层0.3 m;特殊填料为活性炭和沸石。为增强特殊填料对CODCr、NH3-N的去除作用,宜将0.3 m铺设在原来的位置,包裹植物根系,0.1 m铺设在上层布水管管沟中。为增加人工湿地对TP的去除效果,可在碎石层中混合铺设0.1 m石灰石。该系统对危险废物处理站尾水中的污染物去除效果较好,能够将废水水质提高到地表水Ⅳ类出水标准,可为危险废物处理站构建人工湿地提供理论依据和技术参考。
In order to improve the treatment effect by applying constructed wetland on high-salt organic waste water;sandstone,activated carbon,zeolite and sawdust are used as wetland fillers for planting wetland filling and solving plant problems.Spider orchid,reed,vetiver,and strange willow are planted 14 species of wetland plants such as Reed,Scallion,Windmill,Avicennia,Kandelia,Iris,Lamu,Papyrus,Lythroxy,and Sea Sang are planted.Tailwater of hazardous waste is investigated during the operation of vertical flow in the constructed wetland.The removal efficiency of the pollutants,and analysis of the filler configuration and plant species are carried out.The results show that the vertical flow constructed wetland has certain removal effects on organic matter,nitrogen and phosphorus in high-salt wastewater,reed and vetiver show the best growth among all the plants,the capacity of CODCr removal by constructed wetland can be sorted in:activated carbon>zeolite>sandstone>sawdust;the order of NH3-N removal is:zeolite>activated carbon>sandstone>sawdust;TP removal capacity is sorted in:zeolite>sandstone>activated carbon>saw sawdust.The vertical flow constructed wetland fillers from the top to the bottom are a gravel layer of 0.4 m,a special filler layer of 0.4 m,a sandstone layer of 0.4 m,and a gravel layer of 0.3 m.The special fillers are activated carbon and zeolite.In order to enhance the removal of CODCr and NH3-N by special fillers,0.3 m of them can be laid in the original position,thus the plant roots are wrapped.In addition,0.1 m special fillers can be laid in the upper drainage pipe trench.In order to increase the removal effect of TP by constructed wetlands,0.1 m limestone can be mixed and laid in the gravel layer.The system has better effect on removal of pollutants in the tail water of hazardous waste treatment stations,which improves waste water quality to the surface waterⅣwater discharge standard,providing theoretical basis and technical reference for the construction of artificial wetlands in hazardous waste treatm
作者
毛雪慧
易科浪
MAO Xue-hui;YI Ke-lang(Shenzhen Biyuan Environmental Protection Technical Co. Ltd.,Shenzhen 518000,Guangdong Province, China)
出处
《中国农村水利水电》
北大核心
2020年第3期83-86,90,共5页
China Rural Water and Hydropower
关键词
危险废物尾水
垂直流人工湿地
去除能力
填料
植物
hazardous waste tail water
vertical flow constructed wetland
removal capacity
filler
plant
