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Evaluation of the wastewater generated during alkaline pretreatment of biomass for feasibility of recycling and reusing

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  • Kim, Seonghun
  • Kim, Sang-Dae
  • Sohn, Seok Young

Abstract

We evaluated the wastewater generated in the alkali pretreatment process of Miscanthus sacchariflorus with sodium hydroxide for the feasibility of recycling and reusing. After thermal alkali pretreatment of the biomass, the separated alkaline solution and the biomass wash water were filtrated using several different types of membranes to recover sodium hydroxide, as well as to eliminate lignin-hemicellulose fractions from the wastewater. Ion concentration, total organic carbon, and acid-hydrolyzed carbohydrate contents were analyzed to evaluate the quality of the alkaline wastewater. The data indicated that a poly(ether)sulfone-based ultrafiltration (UF) membrane filter with a low molecular weight cut-off was able to recover > 98% sodium ions and to remove > 60% of solubilized organic carbon fractions from the alkaline wastewater. These results indicated that filtration using UF membrane could be an alternative strategy to reuse wastewater and to recover the alkali catalyst in the alkali pretreatment process.

Suggested Citation

  • Kim, Seonghun & Kim, Sang-Dae & Sohn, Seok Young, 2020. "Evaluation of the wastewater generated during alkaline pretreatment of biomass for feasibility of recycling and reusing," Renewable Energy, Elsevier, vol. 155(C), pages 1156-1164.
    • Handle: RePEc:eee:renene:v:155:y:2020:i:c:p:1156-1164
    DOI: 10.1016/j.renene.2020.04.018
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    References listed on IDEAS

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    1. Kim, Seonghun & Kim, Chul Ho, 2014. "Evaluation of whole Jerusalem artichoke (Helianthus tuberosus L.) for consolidated bioprocessing ethanol production," Renewable Energy, Elsevier, vol. 65(C), pages 83-91.
    2. Kim, Seonghun & Kim, Chul Ho, 2013. "Bioethanol production using the sequential acid/alkali-pretreated empty palm fruit bunch fiber," Renewable Energy, Elsevier, vol. 54(C), pages 150-155.
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    2. Pant, Manish & Pant, Tanuja, 2023. "Maximising biotransformation of pine needles to microbial lipids using Lipomyces starkeyi MTCC 1400T," Renewable Energy, Elsevier, vol. 206(C), pages 574-581.
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    4. Zhang, Changwei & Si, Zhihao & Zhang, Lihe & Li, Guozhen & Wen, Jieyi & Su, Changsheng & Wu, Yilu & Zhang, Xu & Cai, Di & Qin, Peiyong, 2022. "Reusing the acetone-butanol-ethanol separated broth as the lignocellulose pretreatment liquor for fresh corn stalk biorefinery," Renewable Energy, Elsevier, vol. 191(C), pages 807-818.

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