Performance of pilot-scale vertical-flow constructed wetlands in responding to variation in influent C/N ratios of simulated urban sewage.
Bioresour Technol
; 101(6): 1693-700, 2010 Mar.
Article
em En
| MEDLINE
| ID: mdl-19854043
ABSTRACT
The performance response of planted and the unplanted wetlands to simulated wastewater with different ratios of carbon to nitrogen (C/N) was studied during a 9-month period in greenhouse conditions. With different C/N ratios for influent water (C/N ratios 2.51, 51 and 101), average removal efficiencies for the unplanted and the planted wetlands were as follows COD (41-52% and 59-68%), TN (24-48% and 25-62%), TP (35-64% and 59-71%) and TOC (22-37% and 16-33%). At C/N 51, both systems performed most efficiently for removal of COD and TP. However, high N removal efficiency only occurred when C/N ratio ranged 2.5-5. Both wetlands exhibited good capabilities of total organic carbon removal at C/N 101. Maybe, appropriate control of the carbon or nitrogen source concentration and C/N ratio in the influent can achieve the optimal effect of nutrients removal.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Biotecnologia
/
Carbono
/
Áreas Alagadas
/
Nitrogênio
Idioma:
En
Ano de publicação:
2010
Tipo de documento:
Article