화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.28, No.2, 145-151, February, 2020
DOI10.1007/s13233-020-8023-2  Export Citation
Enhancing Microalgal Biomass Productivity in Floating Photobioreactors with Semi-Permeable Membranes Grafted with 4-Hydroxyphenethyl Bromide
Kwangmin Kim, Z-Hun Kim1, Hanwool Park, Yunwoo Lee, Kihyun Kim, Sungmo Kang, Sang-Min Lim, and Choul-Gyun Lee†
  • National Marine Bioenergy R&D Consortium and Department of Biological Engineering, Inha University, Incheon 22212, Korea
  • 1Algae Research Team, Microbial Research Department, Nakdonggang National Institute of Biological Resources, Sangju, Gyeongsangbuk-do 37242, Korea
E-mail:
Microalgal biomass productivity of semi-permeable membrane photobioreactors (SPM-PBRs) highly depends on diffusion of nutrient ions from surrounding environment through SPMs. The objective of this study was to enhance microalgal biomass productivity in floating photobioreactors (PBRs) with semi-permeable membranes (SPMs) grafted with 4-hydroxyphenethyl bromide (4-HPB) by increasing ion permeabilities and reducing biofouling of SPMs. In this study, we investigated the reduction of biofouling and improvement of biomass productivity by grafting 4-HPB onto SPMs which could decrease hydrophobicity. The degree of alkylation could be increased by up to 4.9%, with water contact angles on alkylated SPM surfaces decreased from 102.5° to 58.2°, indicating decreased surface hydrophobicity. Ion and water permeabilities of SPMs were increased in alkylated SPMs by 148% and 200%, respectively, compared to non-treated SPM control. Moreover, biomass productivity of PBRs with alkylated SPMs was 75% (740 mg m-2 day-1) higher than that of the control. Biofouling was also remarkably reduced by up to 40% in 4-HPB grafted SPMs after cultivation of microalgae. These results suggest that decreasing hydrophobicity of SPMs by grafting 4-HPB could enhance biomass productivity in SPM-PBRs through improving ion permeability and reducing biofouling.
Keywords:Microalgae;tyrosol;antifouling;ocean cultivation;4-hydroxyphenetyl bromide
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