Department of Urban and Environmental Engineering, Kyoto University, Kyoto, Japan.
Water Sci Technol. 2011;64(11):2135-42. doi: 10.2166/wst.2011.781.
To test whether hyperthermophilic treatment promotes polylactide (PLA) dissolution and methane conversion under anaerobic digestion conditions, a single thermophilic control reactor (55 °C) and a two-phase system consisting of a hyperthermophilic reactor (80 °C) and a thermophilic reactor (55 °C) were continuously fed with a mixture of PLA and artificial kitchen garbage. In Runs 1 and 2, the PLA dissolution ratios in the two-phase system were 79.2 ± 6.5% and 85.2 ± 7.0%, respectively, higher than those of the control. Batch experimental results indicated that hyperthermophilic treatment could promote PLA dissolution to a greater degree as compared with single thermophilic treatment and that ammonia addition also had a promotional effect on PLA dissolution. In the two-phase system, after hyperthermophilic treatment, dissolved PLA was converted to methane gas under the subsequent thermophilic condition.
为了测试高温处理是否能促进聚乳酸（PLA）在厌氧消化条件下的溶解和甲烷转化，连续向单嗜热控制反应器（55°C）和由高温反应器（80°C）和嗜热反应器（55°C）组成的两相系统中进料 PLA 和人工厨房垃圾的混合物。在运行 1 和 2 中，两相系统中 PLA 的溶解率分别为 79.2±6.5%和 85.2±7.0%，高于对照。批处理实验结果表明，与单嗜热处理相比，高温处理能更有效地促进 PLA 的溶解，氨的添加也对 PLA 的溶解有促进作用。在两相系统中，高温处理后，溶解的 PLA 在随后的嗜热条件下转化为甲烷气体。
