College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China.
College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China.
Chemosphere. 2014 Jun;105:146-51. doi: 10.1016/j.chemosphere.2014.01.018. Epub 2014 Feb 6.
Anaerobic co-digestion of waste activated sludge and food waste was investigated semi-continuously using continuously stirred tank reactors. Results showed that the performance of co-digestion system was distinctly influenced by temperature and organic loading rate (OLR) in terms of gas production rate (GPR), methane yield, volatile solids (VS) removal efficiency and the system stability. The highest GPR at 55 °C was 1.6 and 1.3 times higher than that at 35 and 45 °C with the OLR of 1 g VSL(-1)d(-1), and the corresponding average CH₄ yields were 0.40, 0.26 and 0.30 L CH₄ g(-1)VSadded, respectively. The thermophilic system exhibited the best load bearing capacity at extremely high OLR of 7 g VSL(-1)d(-1), while the mesophilic system showed the best process stability at low OLRs (< 5 g VSL(-1)d(-1)). Temperature had a more remarkable effect on the richness and diversity of microbial populations than the OLR.
采用连续搅拌釜式反应器（CSTR）半连续运行的方式，研究了废物活性污泥和食物垃圾的厌氧共消化。结果表明，共消化系统的性能受到温度和有机负荷率（OLR）的显著影响，具体表现为产气量（GPR）、甲烷产量、挥发性固体（VS）去除效率和系统稳定性。在 35°C 和 45°C 下，OLR 为 1 g VSL(-1)d(-1)时，55°C 下的 GPR 分别比 35°C 和 45°C 下的 GPR 高 1.6 和 1.3 倍，相应的平均 CH₄ 产量分别为 0.40、0.26 和 0.30 L CH₄ g(-1)VSadded。高温系统在极高的 OLR（7 g VSL(-1)d(-1)）下表现出了最佳的承载能力，而中温系统在低 OLR（<5 g VSL(-1)d(-1)）下表现出了最佳的过程稳定性。温度对微生物种群的丰富度和多样性的影响比 OLR 更为显著。
