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题名: Microalgal dewatering using a polyamide thin film composite forward osmosis membrane and fouling mitigation
作者: Ye, Jing1, 2, 3; Zhou, Quan1; Zhang, Xuezhi1, 2; Hu, Qiang1, 2, 4, 5
关键词: Forward osmosis ; Microalgal dewatering ; Shearing force ; Membrane fouling
刊名: ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
发表日期: 2018-04-01
DOI: 10.1016/j.algal.2018.02.003
卷: 31, 页:421-429
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Biotechnology & Applied Microbiology
研究领域[WOS]: Biotechnology & Applied Microbiology
英文摘要: In this study, the dewatering of Scenedesmus acuminatus suspensions using a polyamide thin film composite (TFC) forward osmosis (FO) membrane with enhanced surface shearing was investigated. The influence of the draw solution (DS) concentration and microalgal properties were studied, and a fouling mitigation method using mechanical shearing was developed. S. acuminatus suspension dewatering by the same FO membrane was repeated 8 times to test the membrane's recoverability and durability. The results showed that the membrane flux and the concentration of magnesium chloride DS presented a non-linear relationship. In addition, membrane flux did not increase once the DS concentration increased to 2 mol L-1, when serious fouling occurred. However, the membrane flux was significantly improved by mechanical shearing across the membrane surface. At shear rate of 4 (1000 rpm), a 2 mol L-1 MgCl2 solution resulted in an average flux as high as 25.9 L m(-2) h(-1) during the dewatering of a 1.0 g L-1 microalgal suspension. Microalgal cells and algogenic organic matter (AOM) were tested to determine the membrane fouling mechanism. The results showed that the microalgal cells and AOM resulted in 15.4% and 9.4% water flux loss in 1 h, respectively, whereas the combination of microalgal cells and AOM resulted in 24.7% water flux loss. After dewatering for 8 h, microalgal suspensions were concentrated 20 times, and the average membrane flux was 23.3 L m(-2) h(-1). In addition, most of the membrane fouling was reversible by simple hydraulic flushing; the pure water flux remained more than 97% of original pure water flux after 8 repeated dewatering processes, which demonstrated the potential application of FO in microalgal dewatering.
关键词[WOS]: DYNAMIC MICROFILTRATION ; DESALINATION ; FILTRATION ; CULTIVATION ; BIOMASS ; DISK ; FLUX
语种: 英语
项目资助者: State Development & Investment Corporation in China ; 100 Talents Program of Chinese Academy of Sciences(Y623051Z01)
WOS记录号: WOS:000428687600044
ISSN号: 2211-9264
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/50943
Appears in Collections:藻类生物技术和生物能源研发中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Ctr Microalgal Biotechnol & Biofuels, Wuhan 430072, Hubei, Peoples R China
2.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Hubei, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.China Elect Engn Design Inst, SDIC Microalgae Biotechnol Ctr, Beijing 100142, Peoples R China
5.Beijing Key Lab Algae Biomass, Beijing 100142, Peoples R China
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