复合生态系统工程中高效去除磷、氮植被植物的筛选研究

SCREENING STUDY OF THE VEGETATIONAL PLANT SPECIES FOR N AND P REMOVAL FROM DOMESTIC WASTEWATER IN THE INTEGRATED ECO-ENGINEERING SYSTEM

对8种漫灌和垄沟处理和利用单元的植被植物进行了去除污水中磷、氮效能的筛选研究，以皇草为植被的垄沟系统具有较高的净化效能，TP和TN的去除率分别为83．2％和76．3％；以水稻Ⅰ（88—132）和水稻Ⅱ（Suakoto8）为植被的漫灌系统对污水中的N有很高的去除利用效能，去除率分别为84．7和84．3％．质量平衡的研究结果表明，对于以水稻Ⅰ和水稻Ⅱ为植被的漫灌系统及以皇草为植被的垄沟系统而言，植物的吸收作用最主要的是去除污水中N、P的机制；这些植物吸收N、P的能力和对整个处理单元去除污水中N、P的贡献程度与其生物质产量和种植管理方式密切相关．

Eight kinds of plants were tested in channel-dyke and broad irrigation systems for the removal of N and P from wastewarer. The removal rate of TP and TN in the channel-dyke system with Napiergrass (Pennisetum purpurem Schumach. ×Pennisetum alopecuroides (L.) Spreng American), were 83.2 and 76.3%, respectively. The broad inigation systems with face Ⅰ(88-132) (Oryza sativa L.) and face Ⅱ(Suakoko 8) (Oryza glaberrima) had high efficiency for N removal, being 84.7 and 84.3%,respectively. The mass balance data revealed that Napiergnss, face Ⅰ arid Rice Ⅱ were the most improtant nutrient sink, (removing and assimilating) more than 50% of the ac and TN. The contribution degrees of Plant uptake for N and P removed varied with the plant biomass produchvity and the mode of its vegatation and management.