Back to Search
Start Over
Polishing domestic wastewater on a subsurface flow constructed wetland
- Source :
- Repositório Científico de Acesso Aberto de Portugal, Repositório Científico de Acesso Aberto de Portugal (RCAAP), instacron:RCAAP
- Publication Year :
- 2011
- Publisher :
- Taylor and Francis, 2011.
-
Abstract
- Microbial monitoring of constructed wetlands (CWs) treating domestic wastewater is generally scarce, despite the need of more knowledge about its biocenosis. The sanitation quality of a wastewater treated in a CW is a crucial aspect, mainly when the receiving water body is used as a swimming and/or recreation area. The present study was carried out in a horizontal subsurface flow CW planted with Phragmites australis receiving pre-treated domestic wastewater (mean flow 50 m(3) day(-1)), from a population of about 300 inhabitants. The monitoring programme undertaken during the first year operation, revealed removal efficiencies of 61% BOD5, 44% COD, and 65% TSS for inlet water with ca. 90 mg L-1 BOD5, 157 mg L-1 COD, and 17 mg L-1 TSS. Total Coliform (TC) and Faecal Coliform (FC) bacteria were removed from wastewater (mean inlet values of 5 x 10(6) CFU 100 mL(-1) TC and of 9 x 10(5)CFU 100 mL(-1) FC), with efficiencies of 92 and 97%, respectively. The dynamics of microbial communities established in the system assessed by polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE), had revealed a high bacterial diversity within the system, with no relevant differences in composition at the CW inlet and outlet but exhibiting temporal differences in bacterial communities.<br />Isabel A-P. Mina wishes to thank Aguas do Ave S.A., for the permission to carry out this study on Parada do Bouro Treatment Plant, and for the financial support conceded.Cristina S.C. Calheiros wishes to thank a research grant from Fundacao para a Ciencia e Tecnologia (FCT), Portugal (SFRH/BPD/63204/2009).
- Subjects :
- Time Factors
constructed wetland
Colony Count, Microbial
Sewage
02 engineering and technology
Plant Science
010501 environmental sciences
01 natural sciences
Waste Disposal, Fluid
domestic wastewater
RNA, Ribosomal, 16S
Cluster Analysis
DGGE
020701 environmental engineering
education.field_of_study
Ecology
Pollution
Biota
6. Clean water
Constructed wetland
RNA, Bacterial
Biodegradation, Environmental
Wastewater
Sewage treatment
Water Microbiology
Environmental Monitoring
DNA, Bacterial
Population
0207 environmental engineering
microbial communities
Industrial Waste
Microbial communities
Poaceae
Water Purification
Domestic wastewater
Environmental Chemistry
Phragmites australis
education
Subsurface flow
0105 earth and related environmental sciences
Science & Technology
Bacteria
Portugal
business.industry
Denaturing Gradient Gel Electrophoresis
Environmental engineering
Coliform bacteria
Fecal coliform
13. Climate action
Wetlands
Environmental science
business
Subjects
Details
- Language :
- English
- ISSN :
- 15497879 and 15226514
- Volume :
- 13
- Issue :
- 10
- Database :
- OpenAIRE
- Journal :
- International Journal of Phytoremediation
- Accession number :
- edsair.doi.dedup.....d8616578e515127422f9cb7f9b7b86bc