Spent mushroom substrate is expected to be utilised as gasification feedstock in the future. This study investigated its performance in pyrolysis, steam co-gasification, and ash melting. During pyrolysis, derivative thermogravimetry showed shoulder curves indicating higher hemicellulose content compared with timber waste. Steam co-gasification was evaluated using a laboratory-scaled fixed-bed downdraft gasifier. The results showed that blending the substrate with Erianthus at a blend rate of 50 wt% enhances carbon conversion to gas and hydrogen by 7.5–8.8% points, with lower H₂S yield due to the formation of CaSO₄ on the biomass surface. Furthermore, blending the substrate with Japanese cedar resulted in increased softening and fusion temperature, which is explained by the formation of calcium minerals (e.g., gehlenite and albite–calcian). Based on these results, spent mushroom substrate demonstrates high potential to serve as regional feedstock by co-gasification.

废蘑菇底料有望在将来用作气化原料。这项研究调查了其在热解，蒸汽共气化和灰分熔融中的性能。在热解过程中，与木材废物相比，微分热重法显示出肩曲线，表明半纤维素含量更高。使用实验室规模的固定床向下气流气化炉评估蒸汽共气化。结果表明，以50 wt％的掺混比例将底物与Erianthus掺混可将碳转化为气体和氢气的能力提高7.5–8.8％，由于形成CaSO ₄而降低H ₂ S收率。在生物质表面。此外，将底材与日本柳杉混合会导致软化和熔融温度升高，这可通过形成钙矿物质（如钠钙石和钠长石-钙钙石）来解释。根据这些结果，用过的蘑菇底物具有很高的潜力，可通过共气化作为区域原料。