知识与财富的链接
采用水耕植物过滤法(hydroponic bio-filter method,HBFM)净化富营养化地表水的试验表明,在水力负荷为3.0 m3/(m2·d)的条件下,TN、TP年平均去除率分别为16.8%、30.8%,年平均去除速率分别为1.0、0.1 g/(m2·d)．通过底泥沉积去除的氮、磷分别占系统氮、磷总去除量的62.2%和75.9%,是TN、TP最主要的去除途径．HBFM的最佳水力负荷为3.0～4.0 m3/(m2·d).西洋菜收割时的剪割强度影响其氮磷吸收速率,每次剪割长度不得超过10 cm.收割频率为1次/月时不会影响HBFM的氮磷去除效果.
Study was made on the use of hydroponic bio-filter method (HBFM) for eutrophic surface water. Results show that HBFM can remove 16.8% of TN and 30.8% of TP at the hydraulic loading rate(HLR) of 3.0 m3/(m2·d). The removal loading rate of TN and TP can accordingly reach 1.0 and 0.1 g/(m2·d) respectively. The sedimentation of particulate nitrogen and particulate phosphorus plays a major role in nitrogen and phosphorus removal, and its contribution is 62.2% and 75.9% respectively. The optimal HLR of HBFM ranges from 3.0 to 4.0m3/(m2·d). The intension of secateur for Nasturtium officinale has some effect on its uptake rate, thus the length of cut when harvesting should be less than 10 cm. The harvesting frequency of once a month for Nasturtium officinale has no effect on nitrogen and phosphorus removal of HBFM.
