Pretreatment and process optimization of spent seaweed biomass (SSB) for bioethanol production using yeast (Saccharomyces cerevisiae)

被引:23
作者
Sudhakar, M. P. [1 ]
Arunkumar, K. [2 ]
Perumal, K. [3 ]
机构
[1] Govt India, Marine Biotechnol Div, Natl Inst Ocean Technol, Minist Earth Sci, Velacherry Tambaram Main Rd, Chennai 600100, Tamil Nadu, India
[2] Cent Univ Kerala, Dept Plant Sci, Kasaragod 671314, Kerala, India
[3] Sch Biodynam Farming, Annai Lea Community Coll, Biodyne Res Inst, Kadavur Tk, Tamil Nadu, India
关键词
Spent seaweed biomass; Acid pretreatment; Saccharomyces cerevisiae; Bioethanol; DILUTE-ACID HYDROLYSIS; ETHANOL-PRODUCTION; KAPPAPHYCUS-ALVAREZII; ENZYMATIC-HYDROLYSIS; MARINE MACROALGAE; RED; RESOURCE; SACCHARIFICATION; FERMENTATION; EXTRACTION;
D O I
10.1016/j.renene.2020.02.032
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The study aimed to utilize the industrial spent seaweed biomass (SSB) for effective ethanol production using yeast as a fermenting microorganism. Pretreatment of SSB was optimized using different acids. The highest percentage of spent biomass was obtained from G. corticata (12.53 +/- 2.66% DW). The proximate, ultimate and biochemical constituents of spent biomass were calculated. The total sugar (440 +/- 40 mg/g DW), reducing sugar (129.85 +/- 10.23 mg/g DW) and protein (11.08 +/- 0.11 mg/g DW) content of SSB were analysed. Pretreatment was optimized using three different acids. The effect of different pH (4.5, 5.0, 5.5 and 6.0) and temperature (30 and 35 degrees C) on ethanol production using baker's and MTCC yeast was studied. At 35 degrees C, the maximum (4.85% w/w) ethanol production was achieved in a fermentation process maintained at pH 4.5 and 5.0 at 24 h and 72 h, respectively. Substrate fermented with MTCC yeast recorded the maximum production of ethanol (4.98% w/w) at pH 4.5 within 48 h. The fermentation process was scaled up to 300 mL for ethanol production, and achieved 3.75% w/w ethanol (72 h, pH 5.5). To conclude, in future SSB would be a potential renewable novel substrate for bioethanol production when compared to other lignocellulosic substrates. (C) 2020 Elsevier Ltd. All rights reserved.
引用
收藏
页码:456 / 471
页数:16
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