Boe Kanokwan, Karakashev Dimitar, Trably Eric, Angelidaki Irini
Department of Environmental Engineering, Technical University of Denmark, Building 113, DK-2800 Kgs. Lyngby, Denmark.
Water Res. 2009 Feb;43(3):669-76. doi: 10.1016/j.watres.2008.11.037. Epub 2008 Dec 6.
The effect of post-digestion temperature on a lab-scale serial continuous-flow stirred tank reactor (CSTR) system performance was investigated. The system consisted of a main reactor operated at 55 degrees C with hydraulic retention time (HRT) of 15 days followed by post-digestion reactors with HRT of 5.3 days. Three post-digestion temperatures (55 degrees C, 37 degrees C and 15 degrees C) were compared in terms of biogas production, process stability, microbial community and methanogenic activity. The results showed that the post-digesters operated at 55 degrees C, 37 degrees C and 15 degrees C gave extra biogas production of 11.7%, 8.4% and 1.2%, respectively. The post-digester operated at 55 degrees C had the highest biogas production and was the most stable in terms of low VFA concentrations. The specific methanogenic activity tests revealed that the main reactor and the post-digester operated at 55 degrees C and 37 degrees C had very active acidogens and methanogens. In contrast, very low methanogenic activity was observed at 15 degrees C.
研究了消化后温度对实验室规模的串联连续流搅拌釜式反应器（CSTR）系统性能的影响。该系统由一个在55℃下运行、水力停留时间（HRT）为15天的主反应器和随后HRT为5.3天的消化后反应器组成。比较了三种消化后温度（55℃、37℃和15℃）下的沼气产量、工艺稳定性、微生物群落和产甲烷活性。结果表明，在55℃、37℃和15℃下运行的消化后反应器分别额外产生了11.7%、8.4%和1.2%的沼气。在55℃下运行的消化后反应器沼气产量最高，且就低挥发性脂肪酸（VFA）浓度而言最为稳定。特定产甲烷活性测试表明，在55℃和37℃下运行的主反应器和消化后反应器具有非常活跃的产酸菌和产甲烷菌。相比之下，在15℃下观察到非常低的产甲烷活性。
