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dc.contributor.author
Morató, Jordi
dc.contributor.author
Codony, Francesc
dc.contributor.author
Sánchez, Olga
dc.contributor.author
Perez, Leonardo Martin
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dc.contributor.author
García, Joan
dc.contributor.author
Mas, Jordi
dc.date.available
2016-06-01T15:46:08Z
dc.date.issued
2014-05
dc.identifier.citation
Morató, Jordi; Codony, Francesc; Sánchez, Olga; Perez, Leonardo Martin; García, Joan; et al.; Key design factors affecting microbial community composition and pathogenic organisms removal in horizontal subsurface flow constructed wetlands; Elsevier; Science of the Total Environment; 481; 5-2014; 81-89
dc.identifier.issn
0048-9697
dc.identifier.uri
http://hdl.handle.net/11336/5988
dc.description.abstract
Constructed wetlands constitute an interesting option forwastewater reuse since high concentrations of contaminants and pathogenic microorganisms can be removed with these natural treatment systems. In this work, the role of key design factors which could affect microbial removal and wetland performance, such as granular media, water depth and season effect was evaluated in a pilot system consisting of eight parallel horizontal subsurface flow (HSSF) constructed wetlands treating urban wastewater from Les Franqueses del Vallès (Barcelona, Spain). Gravel biofilm as well as influent and effluent water samples of these systems were taken in order to detect the presence of bacterial indicators such as total coliforms (TC), Escherichia coli, fecal enterococci (FE), Clostridium perfringens, and other microbial groups such as Pseudomonas and Aeromonas. The overall microbial inactivation ratio ranged between 1.4 and 2.9 log-units for heterotrophic plate counts (HPC), from 1.2 to 2.2 log units for total coliforms (TC) and from 1.4 to 2.3 log units for E. coli. The presence of fine granulometry strongly influenced the removal of all the bacterial groups analyzed. This effect was significant for TC (p = 0.009), E. coli (p = 0.004), and FE (p = 0.012). Shallow HSSF constructed wetlands were more effective for removing Clostridium spores (p = 0.039), and were also more efficient for removing TC (p = 0.011) and E. coli (p = 0.013) when fine granulometry was used. On the other hand, changes in the total bacterial community from gravel biofilm were examined by using denaturing gradient gel electrophoresis (DGGE) and sequencing of polymerase chain reaction (PCR)-amplified fragments of the 16S rRNA gene recovered from DGGE bands. Cluster analysis of the DGGE banding pattern from the different wetlands showed that microbial assemblages separated according to water depth, and sequences of different phylogenetic groups, such as Alpha, Beta and Delta-Proteobacteria, Nitrospirae, Bacteroidetes, Acidobacteria, Firmicutes, Synergistetes and Deferribacteres could be retrieved from DGGE bands.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Constructed Wetlands
dc.subject
Horizontal Subsurface Flow
dc.subject
Design Factors
dc.subject
Municipal Wastewater Treatment
dc.subject
Gravel Biofilm Examination
dc.subject.classification
Biotecnología Medioambiental
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dc.subject.classification
Biotecnología del Medio Ambiente
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dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
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dc.title
Key design factors affecting microbial community composition and pathogenic organisms removal in horizontal subsurface flow constructed wetlands
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-06-01T13:36:46Z
dc.journal.volume
481
dc.journal.pagination
81-89
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Morató, Jordi. Universidad Politecnica de Catalunya; España
dc.description.fil
Fil: Codony, Francesc. Universidad Politecnica de Catalunya; España
dc.description.fil
Fil: Sánchez, Olga. Universidad Autonoma de Barcelona. Departamento de Genetica y Microbiologia; España
dc.description.fil
Fil: Perez, Leonardo Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Química Rosario; Argentina. Universidad Politecnica de Catalunya; España
dc.description.fil
Fil: García, Joan. Universidad Politecnica de Catalunya; España
dc.description.fil
Fil: Mas, Jordi. Universidad Autonoma de Barcelona. Departamento de Genetica y Microbiologia; España
dc.journal.title
Science of the Total Environment
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0048969714000825
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.scitotenv.2014.01.068
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.scitotenv.2014.01.068
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