A model for organic matter removal in free water surface constructed wetlands

被引：10
|
作者：
Polprasert, C [1 ]
Khatiwada, NR [1 ]
Bhurtel, J [1 ]
机构：
[1] Asian Inst Technol, Environm Engn Program, Klong Luang 12120, Pathumthani, Thailand
来源：
WATER SCIENCE AND TECHNOLOGY | 1998年 / 38卷 / 01期
关键词：
biofilm bacteria; constructed wetlands; COD removal; kinetic parameters; tropical conditions;
D O I：
10.2166/wst.1998.0086
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
This study was conducted to determine performance of free water surface (FWS) constructed wetlands located in the tropics in the removal of organic matter and to assess the importance of biofilm bacteria in the overall kinetics of organic matter (or chemical oxygen demand, COD) removal. Because constructed wetlands normally contain both biofilm and suspended bacteria, a kinetic model incorporating the activities of these two bacteria groups, dispersion number and hydraulic retention time, was employed. The model parameters essential for the calculation of COD removal in FWS constructed wetlands were determined from the experiments and some from the literature. The model was found satisfactory in predicting COD removal efficiencies in a pilot-scale FWS constructed wetland unit treating a domestic wastewater. (C) 1998 Published by Elsevier Science Ltd. All rights reserved
引用
收藏
页码：369 / 377
页数：9
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