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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  
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  
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  
dc.subject.classification
Biotecnología del Medio Ambiente  
dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS  
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  
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  
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