The aim of the study is to enhance hydrolysis of dewatered sewage sludge (moisture content 80-83%) to tackle the problem of low biological methane potential (BMP) and low efficiency of dry anaerobic digestion. Different pre-treatment i.e. physical (ultrasonication), chemical (acid, ozone) and combined (ultrasonication-ozone) methods were investigated and evaluated in terms of BMP and biodegradation. Ultrasonic pre-treatment had the best result among the single technologies, the BMP increased by 104.7%, while total solid (TS), volatile solid (VS) and chemical oxygen demand (COD) reduction were improved by 30.1%, 36.9% and 33.9%, respectively, over control. Combined pre-treatment (ultrasonication-ozone) showed more significant enhancement than single methods as evidenced by 138.2% higher BMP and 53.7%, 63.7% and 57.3% more reduction in TS, VS, COD, respectively, over control. The BMP increment positively correlated either with energy input, concentration or dose of pre-treatment applied. Among the tested methods, the physical pre-treatments out-compete chemical ones. Ultrasonic combined with ozone pre-treatment technology has good energy and economic feasibility.

该研究的目的是增强脱水污泥（水分含量为80-83％）的水解，以解决低生物甲烷气（BMP）和干式厌氧消化效率低的问题。研究了不同的预处理方法，包括物理（超声波），化学（酸，臭氧）和联合（超声波-臭氧）方法，并从BMP和生物降解方面对其进行了评估。超声波预处理在单一技术中效果最好，BMP增加了104.7％，总固体（TS），挥发性固体（VS）和化学需氧量（COD）减少分别提高了30.1％，36.9％和33.9 ％分别控制过度。联合预处理（超声波-臭氧）显​​示出比单一方法更显着的增强，BMP升高138.2％，TS，VS，COD降低53.7％，63.7％和57.3％，分别过度控制。BMP增量与能量输入，浓度或所应用的预处理剂量呈正相关。在经过测试的方法中，物理预处理优于化学方法。超声波结合臭氧预处理技术具有良好的能源和经济可行性。