Eight kinds of plants were tested in channel-dyke and broad irrigation systems for the removal of N and P from wastewater. The removal rate of TP and TN in the channel-dyke system with Napiergrass (Pennisetum purpurem Schumach. X Pennisetum alopecuroides (L.) Spreng American), were 83.2 and 76.3%, respectively. The broad irrigation systems with Rice 1 (88-132) (Oryza sativa L.) and Rice II (Suakoko 8) (Oryza glaberrima) had high efficiency for N removal, being 84-7 and 84.3%, respectively. The mass balance data revealed that Napiergrass, Rice I and Rice II were the most important nutrient sink, (removing and assimilating) more than 50% of the TP and TN. The contribution degrees of plant uptake for N and P removed varied with the plant biomass productivity and the mode of its vegetation and management.
Liu, Jiantong; Qiu, Changqiang; Cheng, Zhujin; Xiao, Bangding; Huang, Yi; Xiao, Zilan.Screening study of the vegetational plant species for N and P removal from domestic wastewater in the integrated eco-engineering system,Acta Hydrobiologica Sinica,1998,22(1):40916