Insights into iron sulfide activated sulfite pretreatment for enhancing short-chain fatty acids production from sludge fermentation: Performance and mechanism - Jiaxin Guo; Lijiao Yin; Xupeng Qian; Jiating Hao; Zhihong Liu; Haichao Luo; Zhangwei He; Wenzong Liu; Xianbao Xu; Xiuping Yue; Aijuan Zhou (Environmental Research, 2026)