Purification of leachate from sludge treatment beds by subsurface flow constructed wetlands: effects of plants and hydraulic retention time.
Constructed wetland
Sludge leachate
Sludge treatment beds
Water purification
Journal
Environmental science and pollution research international
ISSN: 1614-7499
Titre abrégé: Environ Sci Pollut Res Int
Pays: Germany
ID NLM: 9441769
Informations de publication
Date de publication:
Feb 2019
Feb 2019
Historique:
received:
13
09
2018
accepted:
14
12
2018
pubmed:
7
1
2019
medline:
12
4
2019
entrez:
7
1
2019
Statut:
ppublish
Résumé
Sludge treatment beds (STBs) have been used widely in many countries due to low energy consumption, low operating and maintenance costs, and better environmental compatibility. Penetration, evaporation, and transpiration are the main processes for sludge dewatering in STBs. However, the leachate quality from STBs usually cannot meet discharge limits. Moreover, such leachate has very low COD/N ratio, which makes it difficult to treat. In the present study, two subsurface flow (SSF) constructed wetlands (CWs) were investigated for the treatment of leachate from STBs under three different hydraulic retention time (HRT) (3 days, 4 days, 6 days), aiming for evaluating the effects of plants and HRT on treatment performance, as well as the potential of SSF CWs to treat sludge leachate with low COD/N ration. The results showed that plants play an important role in leachate treatment. The best treatment performance was achieved with HRT of 4 days. In this condition, the mean removal efficiencies of COD (chemical oxygen demand), NH
Identifiants
pubmed: 30612364
doi: 10.1007/s11356-018-4006-7
pii: 10.1007/s11356-018-4006-7
doi:
Substances chimiques
Metals, Heavy
0
Sewage
0
Waste Water
0
Water Pollutants
0
Phosphorus
27YLU75U4W
Nitrogen
N762921K75
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
5769-5781Subventions
Organisme : Chinese Government Scholarship
ID : 201706760061
Organisme : Natural Science Foundation of Hubei Province
ID : 2014CFB928
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