Recently, tetrakis(hydroxymethyl)phosphonium sulfate (THPS) was found to play an important role in the sludge pretreatment process. However, the effects of THPS pretreatment on the characteristics of sewage sludge are still insufficiently understood. The properties of sludge after pretreatment with different concentrations of THPS were investigated in this study. The results showed that pH, dewatering ability, and particle size of sludge decreased with increase in THPS concentration. The volatile suspended solids (VSS) and total suspended solids (TSS) of sludge also decreased slightly with increase in THPS concentration. The specific oxygen uptake rate (SOUR) results suggested that lower THPS concentrations (≤1.87 mg/g VSS) enhanced the activity of sludge, but higher concentrations (≥1.87 mg/g VSS) inhibited it. Gram-negative bacteria with peritrichous flagellation (such as Pseudomonas, Escherichia, and Faecalibacterium) were extremely sensitive to THPS. The decrease in specific most probable numbers (MPNs) of pathogens (total coliforms and Escherichia coli) with the increase in THPS concentration also proved the sterilization ability of THPS in the sludge pretreatment process. Pretreatment of sludge with concentrations of THPS higher than 37.41 mg/g VSS would meet the pathogen requirements for land application of Class A biosolids.

中文翻译：

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四（羟甲基）硫酸phospho预处理对污泥特性的影响

最近，发现四（羟甲基）硫酸sulfate（THPS）在污泥的预处理过程中起着重要的作用。但是，对THPS预处理对污水污泥特性的影响仍知之甚少。本研究研究了用不同浓度的THPS预处理后的污泥特性。结果表明，随着THPS浓度的增加，pH值，脱水能力和污泥粒径降低。随着THPS浓度的增加，污泥的挥发性悬浮固体（VSS）和总悬浮固体（TSS）也略有下降。比氧吸收率（SOUR）结果表明较低的THPS浓度（≤1.87mg / g VSS）可以增强污泥的活性，但是较高的浓度（≥1.87mg / g VSS）可以抑制污泥的活性。带有腹膜鞭毛的革兰氏阴性细菌（如假单胞菌，大肠埃希氏菌和费氏杆菌）对THPS极为敏感。随着THPS浓度的增加，病原体（总大肠菌群和大肠杆菌）的特定最可能数量（MPN）减少，也证明了THPS在污泥预处理过程中的杀菌能力。THPS浓度高于37.41 mg / g VSS的污泥的预处理将满足A类生物固体土地应用的病原体要求。随着THPS浓度的增加，病原体（总大肠菌群和大肠杆菌）的特定最可能数量（MPN）减少，也证明了THPS在污泥预处理过程中的杀菌能力。THPS浓度高于37.41 mg / g VSS的污泥的预处理将满足A类生物固体土地应用的病原体要求。随着THPS浓度的增加，病原体（总大肠菌群和大肠杆菌）的特定最可能数量（MPN）减少，也证明了THPS在污泥预处理过程中的杀菌能力。THPS浓度高于37.41 mg / g VSS的污泥的预处理将满足A类生物固体土地应用的病原体要求。