State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China; Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China.
State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China; Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China.
Bioresour Technol. 2022 Jul;355:127276. doi: 10.1016/j.biortech.2022.127276. Epub 2022 May 8.
Recuperative thickening (RT) process was introduced to further upgrade anaerobic digestion of hydrothermal high-solid sludge. Continuous mesophilic (MD-R) and thermophilic (TD-R) digestion with RT (MD-R) were operated synchronously, with corresponding single digestion without RT as controls, namely MD and TD. The MD-R and TD-R increased biogas production rates by 22.8% and 11.0%, and achieved 16.6% and 9.7% higher volatile solids reductions, respectively. The improved performance was partly attributed to increased hydrolysis rate, with 11.2% and 7.4% higher for the MD-R and TD-R than the controls, respectively. The RT increased the numbers of total archaea in the mesophilic and thermophilic systems by 844% and 108%, and the numbers of dominant archaea by 50.4% and 38.1%, respectively, which promoted the degradation of organic matter and the production of biogas. Thus, RT is applicable to further upgrade digesting high-solid sludge.
恢复性增厚（RT）工艺被引入以进一步提高湿热高固体污泥的厌氧消化。连续中温（MD-R）和高温（TD-R）消化与 RT（MD-R）同步运行，相应的无 RT 对照消化分别为 MD 和 TD。MD-R 和 TD-R 分别提高了沼气产生率 22.8%和 11.0%，并分别实现了挥发性固体减少 16.6%和 9.7%。性能的提高部分归因于水解速率的提高，MD-R 和 TD-R 的水解速率比对照分别提高了 11.2%和 7.4%。RT 使中温和高温系统中的总古菌数量分别增加了 844%和 108%，优势古菌数量分别增加了 50.4%和 38.1%，这促进了有机物的降解和沼气的产生。因此，RT 适用于进一步升级消化高固体污泥。
