Department of Chemical Engineering and Environmental Technology, University of Valladolid, Dr. Mergelina s/n, 47011 Valladolid, Spain; Institute of Sustainable Processes, University of Valladolid, Dr. Mergelina s/n, 47011 Valladolid, Spain.
Department of Chemical Engineering and Environmental Technology, University of Valladolid, Dr. Mergelina s/n, 47011 Valladolid, Spain; Institute of Sustainable Processes, University of Valladolid, Dr. Mergelina s/n, 47011 Valladolid, Spain.
Bioresour Technol. 2021 Aug;333:125114. doi: 10.1016/j.biortech.2021.125114. Epub 2021 Apr 6.
The application of steam explosion between two stages of anaerobic digestion may improve energy recovery from sludge while increasing organic matter removal. The influence of the operating conditions of the thermal process: temperature (130-210 °C), retention time (5-45 min) and TS concentration (5.4-10.8%), on the efficiency of VS removal, the biochemical methane potential of hydrolysed sludge and the kinetic constant of the degradation were evaluated using a Taguchi design. Increasing temperature and time increased the removal of VS and the potential of methane production but the kinetic constant was higher at lower temperatures. An optimal operating scheme was found at 170 °C (6 barg), 25 min at the greatest TS concentration in the feeding. Under such conditions, the thermal energy obtained from biogas combustion in a CHP covered the requirements for vapour generation and a profit of 3.54 € m of sludge was estimated.
两段式厌氧消化中蒸汽爆炸的应用可以提高污泥的能量回收效率，同时增加有机物的去除率。通过田口设计评估了热过程的操作条件（温度为 130-210°C、保留时间为 5-45 分钟和 TS 浓度为 5.4-10.8%）对挥发性固体去除率、水解污泥生物甲烷潜力和降解动力学常数的影响。升高温度和时间会增加 VS 的去除率和甲烷生成的潜力，但在较低温度下动力学常数更高。在进料中 TS 浓度最大的情况下，找到了一个在 170°C（6 巴）、25 分钟的最佳操作方案。在此条件下，从 CHP 中的沼气燃烧获得的热能足以满足蒸汽生成的要求，估计每立方米污泥的利润为 3.54 欧元。
