Department of Environmental Energy Engineering, Kyonggi University, 442-760, Republic of Korea.
Department of Environmental Energy Engineering, Kyonggi University, 442-760, Republic of Korea.
Waste Manag. 2019 Feb 15;85:214-221. doi: 10.1016/j.wasman.2018.12.026. Epub 2018 Dec 31.
The influence of thermal hydrolysis pretreatment (THP) on physicochemical properties (pH, total solids, volatile solids, chemical oxygen demand, total nitrogen, ammonium nitrogen, volatile fatty acids, viscosity, and cell morphology) and anaerobic biodegradability of highly concentrated waste activated sludge (WAS) with TS content ranging from 1 to 7% was evaluated at different temperatures ranging from 100 to 220 °C. The biomethane potential (BMP) of the WAS was systematically analyzed and evaluated. Images of its cellular structure were also analyzed. The results indicated that THP is a useful method for solubilizing volatile solids and enhancing CH production regardless of the TS content of the WAS feed. The ultimate CH production determined from the BMP analysis was 313-348 L CH/kg VS (72.6-74.1% CH) at the optimum THP temperature of 180 °C. The results showed that THP could improve both the capacity and efficiency of anaerobic digestion, even at a high TS content, and could achieve the dual purpose of sludge reduction and higher energy recovery.
研究了不同温度（100-220℃）下热水解预处理（THP）对高浓度剩余活性污泥（TS 含量为 1%-7%）理化性质（pH 值、总固体、挥发性固体、化学需氧量、总氮、氨氮、挥发性脂肪酸、黏度和细胞形态）及厌氧生物降解性的影响。系统分析和评价了剩余活性污泥的生物甲烷潜力（BMP），并对其细胞结构图像进行了分析。结果表明，THP 是一种有效方法，可溶解挥发性固体并提高 CH 产量，而与剩余活性污泥进料的 TS 含量无关。在最佳 THP 温度 180℃下，BMP 分析确定的最终 CH 产量为 313-348 L CH/kg VS（72.6%-74.1%CH）。结果表明，THP 可提高厌氧消化的容量和效率，即使在高 TS 含量下，也可实现污泥减量和更高能量回收的双重目的。
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