期刊
WATER RESEARCH
卷 44, 期 17, 页码 5032-5038出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2010.07.017
关键词
Bacterial communities; Constructed wetlands; Tannery wastewater; Arundo donax; Sarcocornia; Salinity
资金
- AdI, PRIME - IDEIA Programme [70/00324]
- Fundacao para a Ciencia e Tecnologia (FCT), Portugal [SFRH/BPD/63204/2009, SFRH/BD/25493/2005]
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/63204/2009, SFRH/BD/25493/2005] Funding Source: FCT
This study is focused on the diversity of bacterial communities from two series of horizontal subsurface flow constructed wetlands (CW) polishing high salinity tannery wastewater. Each series was planted with Arundo donax or Sarcocornia sp. in a substrate composed by expanded clay and sand. Chemical and biochemical oxygen demand removal efficiencies were similar in each series, varying between 58 and 67% (inlet COD 218 +/- 28 mg L-1) and 60 and 77% (inlet BOD5 37 +/- 6 mg L-1), respectively. High numbers of culturable bacteria were obtained from substrate and root samples -5.75 x 10(6)-3.95 x 10(8) CFU g(-1) recovered on marine agar and 1.72 x 10(7)-8.46 x 1(0)8 CFU g(-1) on nutrient agar. Fifty bacterial isolates were retrieved from the CW, related phylogenetically to Firmicutes, Actinobacteria, Bacteroidetes, alpha-, beta-, and gamma-Proteobacteria. Changes in the bacterial communities, from roots and substrate of each series, related to the plant species, hydraulic loading rates and along CW operation were examined using denaturating gradient gel electrophoresis (DGGE). The clustering analysis suggested that a diverse and distinct bacterial community inhabits each series, which was related to the type of plant present in each CW. (C) 2010 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据