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<p>Energy recovery from gas-phase waste streams is essential for reducing environmental impact, promoting sustainable industrial practices, and increasing profit margins. Compared to thermochemical pathways, biocatalytic conversions offer a compelling alternative due to their mild operating conditions and high specificity. However, conventional systems are hindered by slow gas-to-liquid mass transfer, resulting in high energy consumption and low productivity. Here, we demonstrate a new solid-state bioreactor (SSB) technology through a case study of methane-to-succinate conversion using methanotrophs. SSBs immobilize high densities of methanotrophs within gas-permeable, 3D-printed geometries that operate under gas-phase and static conditions. These reactors exhibit a 1–2 order of magnitude increase in biocatalytic performance compared to traditional liquid-phase reactors. Computational models of the SSB are developed and benchmarked against conventional stirred-tank reactor models to highlight design advantages.</p>

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Solid-state bioreactors for efficient energy recovery from gaseous waste streams

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月22日

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  • Samantha Ruelas,
  • Hawi B. Gemeda,
  • Nathan C. Ellebracht,
  • Joshua R. DeOtte,
  • Jennifer M. Knipe,
  • Natalie A. Hwee,
  • Ellsbeth Webb,
  • Michael T. Guarnieri,
  • Calvin A. Henard,
  • Xumeng Ge,
  • Eric B. Duoss,
  • Sarah E. Baker,
  • Fang Qian

摘要

Energy recovery from gas-phase waste streams is essential for reducing environmental impact, promoting sustainable industrial practices, and increasing profit margins. Compared to thermochemical pathways, biocatalytic conversions offer a compelling alternative due to their mild operating conditions and high specificity. However, conventional systems are hindered by slow gas-to-liquid mass transfer, resulting in high energy consumption and low productivity. Here, we demonstrate a new solid-state bioreactor (SSB) technology through a case study of methane-to-succinate conversion using methanotrophs. SSBs immobilize high densities of methanotrophs within gas-permeable, 3D-printed geometries that operate under gas-phase and static conditions. These reactors exhibit a 1–2 order of magnitude increase in biocatalytic performance compared to traditional liquid-phase reactors. Computational models of the SSB are developed and benchmarked against conventional stirred-tank reactor models to highlight design advantages.