Dept. of Civil and Environmental Engineering, University of Western Ontario, London, Ontario, Canada N6A 5B9.
Ultrason Sonochem. 2011 Jan;18(1):164-71. doi: 10.1016/j.ultsonch.2010.04.011. Epub 2010 May 6.
The efficiency of ultrasonication as a pretreatment method for hog manure prior to anaerobic digestion is evaluated at specific energies of 250-30,000 kJ/kgTS. This study confirmed that COD(solubilisation) from particulates correlated well with the more labor and time intensive degree of disintegration test. The particle size distribution for hog manure was bimodal (0.6-2500 μm), while ultrasonication primarily impacting particles in the 0.6-60 μm range. Hog manure was found to be more amenable to ultrasonication than waste activated sludge, as it took only 3000 kJ/kgTS to cause 15% more solubilization as compared to 25,000 kJ/kgTS for waste activated sludge. Bound protein degradation during sonication was 13.5% at 5000 kJ/kgTS and remained constant thereafter for higher energy input. It was noted that biomass cell rupture occurred at specific energy of 500 kJ/kgTS. An economic evaluation indicated that only a specific energy of 500 kJ/kgTS was economical, with a net energy output valued at $4.1/ton of dry solids, due to a 28% increase in methane production.
超声预处理猪粪进行厌氧消化的效果在特定能量为 250-30000kJ/kgTS 下进行了评估。本研究证实，颗粒状 COD（溶解）与更耗费人力和时间的离散度测试结果具有良好的相关性。猪粪的粒径分布呈双峰型（0.6-2500μm），而超声主要影响 0.6-60μm 范围内的颗粒。与废活性污泥相比，猪粪更适合超声处理，因为与 25000kJ/kgTS 相比，只需 3000kJ/kgTS 即可使溶解率提高 15%。在 5000kJ/kgTS 时，超声过程中结合蛋白的降解率为 13.5%，此后随着能量输入的增加而保持不变。研究还指出，生物质细胞破裂发生在特定能量为 500kJ/kgTS 时。经济评估表明，只有特定能量为 500kJ/kgTS 是经济的，由于甲烷产量增加了 28%，其净能量输出价值为 4.1 美元/吨干固体。
