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<p>Because of the increasing contradictions between the depletion of fossil fuels and the pursuit of sustainable development, renewable energy is in great demand. Extra energy inputs restrict biomass from being a carbon–neutral resource for bioenergy conversion. Integrating clean energy can reduce the consumption of conventional energy to settle this issue. Solar energy was introduced into the hydrothermal pretreatment (HP) of lignocellulosic wastes to improve the performance of anaerobic digestion (AD). In this study, a solar-driven hydrothermal pretreatment (SHP) reactor was designed, and four different kinds of weather conditions were selected to investigate the performance of the pretreatment using corn straw (CS) for AD. The results indicated that good weather conditions (high light intensity) achieved the highest temperature of 156.2&#xa0;°C in the SHP reactor. It was surprising that the pretreated CS at low light intensity (LI) had the highest cumulative methane yield of 210.61&#xa0;mL/g TS. Correspondingly, the maximum net energy was gained with LI, which was 10.10% higher than that of the untreated substrates. The life cycle assessment results indicated that SHP had better environmental benefits than traditional HP. The work suggested that introducing solar energy into HP is feasible to satisfy the energy requirements, and it is promising for large-scale application.&#xa0;</p> Graphical Abstract <p></p>

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Solar-Driven Hydrothermal Pretreatment to Improve Anaerobic Digestion of Corn Straw

  • 期刊论文

  • 发表日期：

    2025年5月22日

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  • Lanxing Ying,
  • Yao Zhong,
  • Jinsong He,
  • Dong Tian,
  • Mei Huang,
  • Yanzong Zhang,
  • Yan Liu,
  • Fei Shen

摘要

Because of the increasing contradictions between the depletion of fossil fuels and the pursuit of sustainable development, renewable energy is in great demand. Extra energy inputs restrict biomass from being a carbon–neutral resource for bioenergy conversion. Integrating clean energy can reduce the consumption of conventional energy to settle this issue. Solar energy was introduced into the hydrothermal pretreatment (HP) of lignocellulosic wastes to improve the performance of anaerobic digestion (AD). In this study, a solar-driven hydrothermal pretreatment (SHP) reactor was designed, and four different kinds of weather conditions were selected to investigate the performance of the pretreatment using corn straw (CS) for AD. The results indicated that good weather conditions (high light intensity) achieved the highest temperature of 156.2 °C in the SHP reactor. It was surprising that the pretreated CS at low light intensity (LI) had the highest cumulative methane yield of 210.61 mL/g TS. Correspondingly, the maximum net energy was gained with LI, which was 10.10% higher than that of the untreated substrates. The life cycle assessment results indicated that SHP had better environmental benefits than traditional HP. The work suggested that introducing solar energy into HP is feasible to satisfy the energy requirements, and it is promising for large-scale application. 

Graphical Abstract