Aquatic Plants Influence Treatment Performance in Constructed Wetlands
Date Issued
2005
Date
2005
Author(s)
Huang, Chih-Feng
DOI
zh-TW
Abstract
The purpose of this study is to investigate efficiency of natural purification of aquatic plants in constructed wetland, and to manage different kinds of macrophytes. Two pots were arranged for each species, one planted and the other unplanted. Aquatic planted pots were sampled to analyze their heights densities of plants and BOD.
In this study, fifteen species of aquatic plants were chosen. And, Phragmites vallatoria (Pluk. Ex L.), Eriochloa prrocera Retz., Cyperus difformis Linn., were suggested to be more suitable for reducing the concentration of BOD than other plants. The reducing rate constants were caculated 0.432, 0.386, and 0.211, respectively. However removal efficiencies of macrophytes depend on influent hydraulic loading rates. There is limitation in influent hydraulic loading rates. Some aquatic plant removal BOD as influent rate must reach a critertia concentration. And, some macrophytes don’t perform efficifiency removal of BOD until the hydraulic loading rates reach particular concentration, such as Ludwigia adscendens, Hygrophila pogonocalyx Hayata, Potamogeton crispus, Torulinium odoratum, Bacopa monnieri, Marsilea minuta, Schoenoplectus mucronatus subsp. Robustus, Typha angustifolia L.. The minimun hydraulic loading rates of this eight species are 7.4 mg/l, 7.9 mg/l, 8.2 mg/l, 43.8 mg/l, 29.9 mg/l, 12.2 mg/l, 14.5 mg/l and, 10.1 mg/l.
Subjects
人工濕地
自然淨化作用
水生植物
生化需氧量
Constructed wetlands
Natural purification
Macrophytes
BOD
SDGs
Type
thesis