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Thermal hydrolysis pre-treatment combined with anaerobic digestion for energy recovery from organic wastes
Journal of Material Cycles and Waste Management ( IF 3.1 ) Pub Date : 2020-04-07 , DOI: 10.1007/s10163-020-01025-2
Xiaohui Liu , Changmin Lee , Jae Young Kim

To investigate the applicability and effectiveness of anaerobic digestion combined with thermal hydrolysis pre-treatment (THP), one pre-treatment condition (170 ℃/10 bar, 30 min) was set to process three different organic wastes (i.e., food waste, swine manure, and sewage sludge) under mesophilic (35 ± 1 ℃) and thermophilic (50 ± 1 ℃) temperatures. The characteristics of raw/pre-treated substrates were analyzed and biochemical methane potential (BMP) tests were performed. Results showed that THP improved organics solubilization as demonstrated by decreased VSS/VS and increased SCOD/TCOD ratios. BMP tests indicated that thermophilic anaerobic digestion (TAD) combined with THP did not significantly promote cumulative methane production (CMP) of food waste and swine manure (p > 0.05). The CMP of pre-treated sewage sludge in mesophilic anaerobic digestion (MAD) condition was higher than those of other digestion conditions. The modified Gompertz model and first-order kinetic model illustrated that THP improved methane production potential, hydrolysis rate as well as methane yield rate of swine manure and sewage sludge except for food waste; TAD had no obvious influence on those parameters. According to net energy estimation, THP enhanced energy production of methane from swine manure and sewage sludge except for food waste; TAD consumed more energy than MAD. The increased energy benefits by THP did not cover its extra energy consumptions in the combination of mesophilic and thermophilic anaerobic digestion in this study.



中文翻译:

热水解预处理与厌氧消化相结合,可从有机废物中回收能量

为了研究厌氧消化与热水解预处理(THP)相结合的适用性和有效性,设定了一种预处理条件(170℃/ 10 bar,30分钟)来处理三种不同的有机废物(即食物垃圾,猪粪)中温(35±1℃)和嗜热(50±1℃)温度下的粪便和污水污泥)。分析了原始/预处理基材的特性,并进行了生化甲烷潜力(BMP)测试。结果表明,如降低的VSS / VS和增加的SCOD / TCOD比所显示的,THP改善了有机物的溶解性。BMP测试表明,高温厌氧消化(TAD)与THP结合不会显着促进食物垃圾和猪粪的累积甲烷生成(CMP)(p > 0.05)。中温厌氧消化(MAD)条件下的预处理污泥的CMP高于其他消化条件。改进的Gompertz模型和一阶动力学模型表明,THP改善了除食物垃圾之外的猪粪和污水污泥的甲烷生产潜能,水解速度以及甲烷产率。TAD对那些参数没有明显的影响。根据净能量估算,THP可以提高猪粪和污水污泥中除食物垃圾之外的甲烷的能量生产;TAD比MAD消耗更多的能量。在这项研究中,THP增加的能源效益并未涵盖中温和高温厌氧消化相结合的额外能源消耗。

更新日期:2020-04-21
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