globalchange  > 气候变化事实与影响
DOI: 10.1016/j.watres.2019.02.033
Scopus记录号: 2-s2.0-85062704170
论文题名:
Slow sand filtration for biofouling reduction in seawater desalination by reverse osmosis
作者: Freitas de Oliveira F.; Schneider R.P.
刊名: Water Research
ISSN: 431354
出版年: 2019
卷: 155
起始页码: 474
结束页码: 486
语种: 英语
英文关键词: Biofouling control ; Microbial growth potential ; Reverse osmosis ; Seawater ; Slow sand filtration
英文摘要: Control of the organic substrate pool that determines the microbial growth potential (MGP) of feedwater in seawater reverse osmosis (SWRO) is a challenge unresolved in conventional or advanced membrane pretreatment. Slow sand filtration (SSF) combines filtration with biodegradation, but its capability of reducing MGP, proteins and carbohydrates on seawater feeds is not known. Two SSF, one constructed with new media (newSSF) and one from a previous filtration run (oldSSF), reduced MGP as measured in a growth assay with the marine organism Pseudoalteromonas songiae by one order of magnitude after maturation periods of 76 and 61 days, respectively. The reduction of the amount of biopolymers deposited on the surfaces of SWRO membranes in laminar fluid flow cells was significant with filtrates from biologically non-acclimated SSF (proteins: 60% (oldSSF) and −66% (new SSF), carbohydrates: 75% (oldSSF) and −70% (newSSF)) and an even greater reduction was observed after filter maturation (proteins: 81% (oldSSF) and −76% (new SSF), carbohydrates: 88% (oldSSF) and −88% (newSSF). Turbidity was less than 0.3 nephelometric turbidity units (NTU) and silt density index (SDI) < 4 immediately after startup and during the 181 days operating period regardless of the oscillations of the raw sea water quality. Filtration and biological activity were restricted to the top 30 cm of the media column, with no significant further contribution of the deeper media layers to filtrate quality. © 2019 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/121881
Appears in Collections:气候变化事实与影响

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作者单位: Programa de Pósgraduação Interunidades em Biotecnologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, Cidade Universitária, Avenida Prof. Lineu Prestes, 1374, São Paulo –, SP 05508-900, Brazil; CEBIMAR - Centro de Biologia Marinha da Universidade de São Paulo, Rodovia Manoel Hypólito do Rego, km. 131, São Sebastião –, SP 11600-000, Brazil; Department of Chemical Engineering, Polytechnical School, University of São Paulo, Av. Prof. Luciano Gualberto, Travessa 3, n. 380, São Paulo –, SP 05508-900, Brazil

Recommended Citation:
Freitas de Oliveira F.,Schneider R.P.. Slow sand filtration for biofouling reduction in seawater desalination by reverse osmosis[J]. Water Research,2019-01-01,155
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