【摘要】 针对现行污水处理厂污泥脱水效能低的问题，以污泥深度脱水（含水率≤60%）为目标，研发表面活性剂-混凝剂组合调理技术，重点探究了调理剂组合对污泥脱水效能的影响及其作用机制。结果表明，阴离子型表面活性剂十二烷基硫酸钠（SDS）、阳离子型表面活性剂十六烷基三甲基溴化铵（CTAB）与混凝剂聚合氯化铝（PAC）和聚丙烯酰胺（PAM）组合调理显著提高了污泥脱水性能，当CTAB、SDS、PAC、PAM投加量分别为250、20、80、5 mg/gDS时，经组合调理后泥饼含水率降至57.06%；污泥比阻由调理前的7.19×10¹² m/kg降至2.61×10¹² m/kg；污泥的Zeta电位、接触角、中位粒径分别由-17.49 mV、63.94°、26.4μm提升至1.07 mV、104.81°、62.9μm；并高效溶出污泥胞外聚合物（EPS）中的蛋白质和多糖，将紧密型EPS（TB-EPS）中的色氨酸、酪氨酸等物质大量溶出至溶解性EPS（S-EPS）中；同时释放大量污泥结合水，结合水含量由2.17 g/gDS显著降至0.90 g/gDS；另外，CTAB与SDS、PAC与PAM组合均能产生协同效应，使蛋白质二级结构组成比例显著改变，导致污泥蛋白质变得松散，EPS疏水性增强。更多还原

【Abstract】 This study addressed the low efficiency of sludge dewatering in current wastewater treatment plants, aiming for sludge deep dewatering（moisture content≤60%）. A combined conditioning technology using surfactants and coagulants was developed, focusing on the impact of the combined conditioning agents on sludge dewatering efficiency and their underlying mechanisms. The results demonstrated that the combination of anionic surfactant sodium dodecyl sulfate（SDS）, cationic surfactant cetyl trimethyl ammonium bromide（CTAB）, and coagulant polyaluminum chloride（PAC）, as well as polyacrylamide（PAM）, significantly improved sludge dewaterability. Under optimal dosages of 250 mg/gDS for CTAB, 20 mg/gDS for SDS, 80 mg/gDS for PAC, and 5 mg/gDS for PAM, the moisture content of the sludge cake decreased to 57.06%. The specific resistance to filtration reduced from 7.19×10¹² m/kg to 2.61×10¹² m/kg. The Zeta potential, contact angle, and median particle size of the sludge improved from-17.49 mV, 63.94°, and 26.4 μm to 1.07 mV, 104.81°, and 62.9 μm, respectively. The effective extraction of proteins and polysaccharides from the extracellular polymeric substances（EPS） of the sludge led to a substantial release of tryptophan, tyrosine, and other substances from TB-EPS to S-EPS, resulting in the liberation of a significant amount of bound water. The bound water content decreased markedly from 2.17 g/gDS to 0.90 g/gDS. The combination of CTAB with SDS and PAC with PAM exhibited synergistic effects, significantly altering the secondary structure composition of sludge proteins, leading to a more dispersed protein structure and enhanced hydrophobicity of EPS.更多还原