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Alkali Recycling from Rice Straw Hydrolyzate by Ultrafiltration: Fouling Mechanism and Pretreatment Efficiency
Li, Yun1,2; Qi, Benkun1; Luo, Jianquan1; Wan, Yinhua1
2015-08-19
Source PublicationINDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN0888-5885
Volume54Issue:32Pages:7925-7932
AbstractAlkaline pretreatment of lignocellulosic biomass produced certain amounts of alkaline-soluble lignin and phenolic compounds in the hydrolyzate, which might bring a negative effect on the alkali reuse for continuous biomass pretreatment. In the present work, lignin recovery from the alkaline rice straw hydrolyzate by ceramic ultrafiltration was investigated in terms of lignin retention and fouling mechanisms. Results showed that over 75% of lignin was retained using a ceramic membrane with the molecular weight cutoff (MWCO) of 5000 Da. The relative higher cross-flow velocity and lower pressure led to less resistance and membrane fouling, and complete or intermediate pore blocking was the most possible fouling mechanism. The alkaline solution from an ultrafiltration permeate was recycled for the pretreatment of fresh rice straw after a simple pH adjustment. By comparing the composition of solid residues and its enzymatic hydrolyzate after pretreatments with fresh and recycled alkaline solutions, it was found that the alkaline hydrolyzate could be polished by ultrafiltration for further reuse (at least four cycles). Moreover, the alkali recycling from the hydrolyzate could retard the release of phenolic compounds during the pretreatment. The consumptions of NaOH and water were reduced by 42% and 50%, respectively, during pretreatments with reuse of alkali. Alkali recycling benefits lignocellulose biorefinery by decreasing the costs associated with water and alkali supplementation as well as wastewater treatment.
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1021/acs.iecr.5b01766
Indexed BySCI
Language英语
WOS KeywordBLACK LIQUOR ; ETHANOL-PRODUCTION ; SUGARCANE BAGASSE ; LIGNIN ; PURIFICATION ; DELIGNIFICATION ; FRACTIONATION ; PERFORMANCE ; BIOMASS ; MODULE
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000359962300017
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/19486
Collection生化工程国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Li, Yun,Qi, Benkun,Luo, Jianquan,et al. Alkali Recycling from Rice Straw Hydrolyzate by Ultrafiltration: Fouling Mechanism and Pretreatment Efficiency[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2015,54(32):7925-7932.
APA Li, Yun,Qi, Benkun,Luo, Jianquan,&Wan, Yinhua.(2015).Alkali Recycling from Rice Straw Hydrolyzate by Ultrafiltration: Fouling Mechanism and Pretreatment Efficiency.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,54(32),7925-7932.
MLA Li, Yun,et al."Alkali Recycling from Rice Straw Hydrolyzate by Ultrafiltration: Fouling Mechanism and Pretreatment Efficiency".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 54.32(2015):7925-7932.
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