English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/17298
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Initial contaminant removal performance factors in horizontal flow reed beds used for treating urban wastewater

AuthorsGarcía, Joan; Aguirre, Paula; Mujeriego, Rafael; Huang, Yuming; Ortiz Vera, Laura; Bayona Termens, Josep María
KeywordsConstructed wetlands
Hydraulic loading rate
Aspect ratio
Water depth
Subsurface flow
Issue Date5-Mar-2004
PublisherElsevier
CitationWater Research 38(7): 1669-1678 (2004)
AbstractThis study evaluates the effect of hydraulic loading rate (HLR), aspect ratio, granular medium size and water depth on the removal of selected contaminants during the start up of horizontal subsurface flow reed beds (HFRBs). Experiments were carried out in a pilot-scale HFRB system comprising four pairs of lined beds of almost equal surface area (54–56 m2 each bed), with the following aspect ratios: 1:1, 1.5:1, 2:1 and 2.5:1. The size of the granular medium of each pair varied from coarse granitic gravel (D60=10 mm, Cu=1.6) to small granitic gravel (D60=3.5 mm, Cu=1.7). The beds of the pair with longest aspect ratio were made shallower (0.27 m) than the rest (0.5 m) The system was sampled weekly from May 2001 to January 2002. The results indicate that HLR and water depth are determining factors in the performance of the HFRBs. Beds with a water depth of 0.27 m removed more COD (70–80%), BOD5 (70–85%), ammonia (40–50%) and dissolved reactive phosphorus (DRP) (10–22%) than beds with a depth of 0.5 m (60–65% for COD, 50–60% for BOD5, 25–30% for ammonia, and 2–10% for DRP). The higher efficiency observed shallower beds was related to their less reducing conditions (average redox potential (E) ranging from −351 to −338 mV) than beds with a depth of 0.5 m (−390 to −358 mV). The difference in E status between two bed types seems to lead to differences in the biochemical processes. In fact, denitrification was estimated to be a significant reaction in shallower beds.
Description10 pages, 4 figures, 5 tables.-- PMID: 15026221 [PubMed].-- Printed version published Apr 2004.
Publisher version (URL)http://dx.doi.org/10.1016/j.watres.2004.01.011
URIhttp://hdl.handle.net/10261/17298
DOI10.1016/j.watres.2004.01.011
ISSN0043-1354
E-ISSN1879-2448
Appears in Collections:(IDAEA) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.