This study investigated the feasibility and performance of simultaneous in-situ CO₂ sequestration and CH₄ production promotion by wollastonite addition in sludge AD. A maximum CH₄ yield increment of 30.8% and maximum methane production rate increment of 64.9% with wollastonite addition at dosage of 16.25 g/L were achieved. CO₂ was efficient sequestered by wollastonite addition and resulted in a higher CH₄ content of 81.7%–82.4%. The mechanism of CO₂ sequestration by wollastonite was confirmed as Ca²⁺ release and subsequently carbonation based on cation and precipitates analysis. The results demonstrated that wollastonite could be applied as an effective additive for simultaneous in-situ CO₂ sequestration and CH₄ production promotion of sludge AD.

本研究调查了在污泥AD中同时进行原位CO ₂固存和通过硅灰石添加促进CH ₄产生的性能。在添加剂量为16.25 g / L的硅灰石时，最大CH ₄产量增加了30.8％，最大甲烷生产率增加了64.9％。硅灰石的添加有效隔离了CO ₂，并导致较高的CH ₄含量为81.7％–82.4％。硅灰石螯合CO ₂的机理被确认为Ca ²⁺释放并随后基于阳离子和沉淀物分析进行碳酸化。结果表明，硅灰石可作为有效的添加剂同时污泥原位CO ₂螯合和CH ₄产生促进。