山东农业大学学报（自然科学版）2026，Vol.57Issue(3)：549-559,11.DOI:10.3969/j.issn.1000-2324.2026.03.015
PS-Fe预处理提升污泥厌氧发酵提取SCFAs效能的研究
Research on the Enhancement of SCFAs Extraction Efficiency in Sludge Anaerobic Fermentation by PS-Fe Pretreatment
摘要
Abstract
The anaerobic fermentation of waste activated sludge(WAS)for the production of short-chain fatty acids(SCFAs)holds broad application prospects,but its efficiency remains relatively low.This study employs the PS-Fe pretreatment technology to systematically investigate the effects of operating conditions on enhancing SCFAs production and composition.The results show that under the optimized conditions-PS to Fe molar ratio of 1.5∶1,PS dosage of 1.0 mmol/g TSS,fermentation temperature of 35℃,sludge concentration of 40 g TSS/L,and pH of 7.0-7.5-the SCFAs yield reaches 138.70 mg COD/g VSS,representing a 10.58-fold increase compared to the control group,with acetic acid accounting for 74.35%.Further research reveals that PS-Fe pretreatment disrupts the structure of extracellular polymeric substances(EPS)and cells,leading to increased concentrations of protein,polysaccharide,and DNA by 0.8,1.3,and 13.7 times,respectively.Additionally,it activates the activities of protease,α-glucosidase,and acetate kinase,shifting the dominant fermentation type from propionic acid fermentation(accounting for 55.84%)to acetic acid fermentation(accounting for 74.35%).This study demonstrates the feasibility and underlying mechanism of PS-Fe pretreatment in promoting SCFAs generation,thereby offering valuable insights for the efficient recovery of biomass from WAS.关键词
PS-Fe预处理/短链脂肪酸/剩余污泥/乙酸发酵/胞外聚合物Key words
PS-Fe pretreatment/short chain fatty acids/waste activated sludge/acetic acid fermentation/extracellular polymeric substances分类
建筑与水利引用本文复制引用
谭德发,李艺璇,邹士法,张军帅,张庆浩,武福涛,尹儿琴..PS-Fe预处理提升污泥厌氧发酵提取SCFAs效能的研究[J].山东农业大学学报（自然科学版）,2026,57(3):549-559,11.基金项目
中铁(泰安)环境治理有限公司研究项目(JSS242402) （泰安）
山东省重点研发计划(2023TZXD019) （2023TZXD019）
