DOI: 10.1016/j.watres.2018.11.055
Scopus记录号: 2-s2.0-85057307705
论文题名: Microcystis aeruginosa and microcystin-LR removal by household slow sand filters operating in continuous and intermittent flows
作者: Terin U.C. ; Sabogal-Paz L.P.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 29
结束页码: 39
语种: 英语
英文关键词: Biosand filter
; Cyanobacteria
; Cyanotoxin
; Developing countries
; Drinking water
; Water treatment
Scopus关键词: Bacteria
; Developing countries
; Passive filters
; Potable water
; Water filtration
; Biosand filter
; Cyanobacteria
; Cyanotoxins
; Microcystin-LR removal
; Microcystis aeruginosa
; Treatment efficiency
; Water treatment technologies
; World Health Organization
; Water treatment
; deferiprone
; microcystin
; microcystin LR
; polyvinylchloride
; water
; biofiltration
; cell
; cyanobacterium
; developing world
; drinking water
; filter
; operations technology
; pollutant removal
; toxin
; water treatment
; Article
; bacterium culture
; cell density
; filtration
; household slow sand filter
; inoculation
; Microcystis aeruginosa
; priority journal
; retention time
; sand
; turbidity
; water treatment
; world health organization
; Cyanobacteria
; Microcystis aeruginosa
英文摘要: A household slow sand filter (HSSF) is a widely used water treatment technology recognized as one of the most effective and sustainable in reducing waterborne diseases. However, there is a lack of knowledge concerning its behaviour in the presence of cyanobacteria and cyanotoxins. In this context, the study aimed to evaluate HSSF ability to remove Microcystis aeruginosa cells (stain BB005) and microcystin-LR from water, among other parameters, when operated under continuous (C-HSSF) and intermittent (I-HSSF) flows. C–HSSF was operated at a constant filtration rate (1.22 m3 m−2 day−1), while I-HSSF was operated at a variable filtration rate (starting at 2.95 m3 m−2 day−1 and finishing at zero). Each filter produced 60 L day−1. The influence of the pause period was also tested in the I-HSSF. The water from the study was prepared by inoculating M. aeruginosa culture in water from a well to a final cell density of ± 1 × 105 cells mL−1. M. aeruginosa removal rates were 2.39 ± 0.34 log and 2.01 ± 0.43 log by C–HSSF and I-HSSF, respectively. Microcystin-LR concentration in studied water was 5.55 μg L−1, and both filters produced filtered water with microcystin concentrations below 1.0 μg L−1, the maximum value recommended by the World Health Organization (WHO), for most of the samples. Turbidity and apparent colour were also within WHO guidelines. Filters operating with different flow regimes and distinct residence times did not statistically influence treatment efficiencies. Both filters showed promising results in the M. aeruginosa and microcystin-LR removals from water; nevertheless, more research is needed to understand the mechanisms involved in the reduction of both cyanobacteria and cyanotoxin through household slow sand filtration. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122116
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Hydraulics and Sanitation, São Carlos School of Engineering, University of São Paulo, Trabalhador São-Carlense Avenue, 400, São Paulo, 13566-590, Brazil
Recommended Citation:
Terin U.C.,Sabogal-Paz L.P.. Microcystis aeruginosa and microcystin-LR removal by household slow sand filters operating in continuous and intermittent flows[J]. Water Research,2019-01-01