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Enzymatical hydrolysis of food waste and ethanol production from the hydrolysate

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  • Yan, Shoubao
  • Li, Jun
  • Chen, Xiangsong
  • Wu, Jingyong
  • Wang, Pingchao
  • Ye, Jianfeng
  • Yao, Jianming

Abstract

The aim of present paper was to investigate the prospect for the use of food waste, an important municipal waste, as a potential substrate to generate hydrolysates for fuel ethanol production. The critical variables that affected reducing sugar production from food waste were identified by Plackett–Burman design (glucoamylase loud, time, temperature and pH) and further optimized by using a four factor central composite design of response surface methodology. According to the results of response surface analysis, the optimum conditions for reducing sugar production were determined to be glucoamylase loud of 142.2u/g, saccharification pH of 4.82, enzyme reaction temperature of 55°C, enzyme reaction time of 2.48h. Reducing sugar production (164.8g/L) in the optimized condition was in good agreement with the value predicted by the quadratic model (164.3g/L), thereby confirming its validity. Furthermore, the obtained liquid phase of food waste hydrolysate was utilized for production of ethanol by using Saccharomyces cerevisiae H058 fermentation. In order to develop an economical process for transforming food waste hydrolysates to ethanol, non-sterilized and sterilized processes were compared in the experiments. The result shows non-sterilized fermentation without undergoing heat treatment was better due to the unspoiled nutrients inside. These results helped to find the effective strategies to utilize food waste for ethanol production.

Suggested Citation

  • Yan, Shoubao & Li, Jun & Chen, Xiangsong & Wu, Jingyong & Wang, Pingchao & Ye, Jianfeng & Yao, Jianming, 2011. "Enzymatical hydrolysis of food waste and ethanol production from the hydrolysate," Renewable Energy, Elsevier, vol. 36(4), pages 1259-1265.
    • Handle: RePEc:eee:renene:v:36:y:2011:i:4:p:1259-1265
    DOI: 10.1016/j.renene.2010.08.020
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    References listed on IDEAS

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    1. Kenji Sakai & Masayuki Taniguchi & Shigenobu Miura & Hitomi Ohara & Toru Matsumoto & Yoshihito Shirai, 2003. "Making Plastics from Garbage," Journal of Industrial Ecology, Yale University, vol. 7(3‐4), pages 63-74, July.
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    Cited by:

    1. Barampouti, E.M. & Mai, S. & Malamis, D. & Moustakas, K. & Loizidou, M., 2019. "Liquid biofuels from the organic fraction of municipal solid waste: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 110(C), pages 298-314.
    2. Zheng, Longyu & Li, Qing & Zhang, Jibin & Yu, Ziniu, 2012. "Double the biodiesel yield: Rearing black soldier fly larvae, Hermetia illucens, on solid residual fraction of restaurant waste after grease extraction for biodiesel production," Renewable Energy, Elsevier, vol. 41(C), pages 75-79.
    3. Zhang, Cunsheng & Kang, Xinxin & Wang, Fenghuan & Tian, Yufei & Liu, Tao & Su, Yanyan & Qian, Tingting & Zhang, Yifeng, 2020. "Valorization of food waste for cost-effective reducing sugar recovery in a two-stage enzymatic hydrolysis platform," Energy, Elsevier, vol. 208(C).
    4. Ishtiaq Ahmed & Muhammad Anjum Zia & Huma Afzal & Shaheez Ahmed & Muhammad Ahmad & Zain Akram & Farooq Sher & Hafiz M. N. Iqbal, 2021. "Socio-Economic and Environmental Impacts of Biomass Valorisation: A Strategic Drive for Sustainable Bioeconomy," Sustainability, MDPI, vol. 13(8), pages 1-32, April.
    5. Yang, Sen & Li, Qing & Gao, Yang & Zheng, Longyu & Liu, Ziduo, 2014. "Biodiesel production from swine manure via housefly larvae (Musca domestica L.)," Renewable Energy, Elsevier, vol. 66(C), pages 222-227.
    6. Thangavelu, Saravana Kannan & Ahmed, Abu Saleh & Ani, Farid Nasir, 2016. "Review on bioethanol as alternative fuel for spark ignition engines," Renewable and Sustainable Energy Reviews, Elsevier, vol. 56(C), pages 820-835.
    7. Hafid, Halimatun Saadiah & Rahman, Nor’ Aini Abdul & Shah, Umi Kalsom Md & Baharuddin, Azhari Samsu & Ariff, Arbakariya B., 2017. "Feasibility of using kitchen waste as future substrate for bioethanol production: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 74(C), pages 671-686.
    8. Karmee, Sanjib Kumar, 2016. "Liquid biofuels from food waste: Current trends, prospect and limitation," Renewable and Sustainable Energy Reviews, Elsevier, vol. 53(C), pages 945-953.
    9. Qiao Wang & Huan Li & Kai Feng & Jianguo Liu, 2020. "Oriented Fermentation of Food Waste towards High-Value Products: A Review," Energies, MDPI, vol. 13(21), pages 1-29, October.
    10. Rex, Emma & Rosander, Erica & Røyne, Frida & Veide, Andres & Ulmanen, Johanna, 2017. "A systems perspective on chemical production from mixed food waste: The case of bio-succinate in Sweden," Resources, Conservation & Recycling, Elsevier, vol. 125(C), pages 86-97.
    11. Leonidas Matsakas & Paul Christakopoulos, 2015. "Ethanol Production from Enzymatically Treated Dried Food Waste Using Enzymes Produced On-Site," Sustainability, MDPI, vol. 7(2), pages 1-13, January.

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