Odedina Mary Jesuyemi, Charnnok Boonya, Saritpongteeraka Kanyarat, Chaiprapat Sumate
Department of Civil Engineering, Faculty of Engineering, Prince of Songkla University, Songkhla, Hat Yai Campus, Songkhla 90110, Thailand.
PSU Energy System Research Institute (PERIN), Prince of Songkla University, Songkhla, Hat Yai Campus, Songkhla 90110, Thailand.
Waste Manag. 2017 Oct;68:128-138. doi: 10.1016/j.wasman.2017.07.003. Epub 2017 Jul 11.
Methane production potential of tropical fruit wastes, namely lady-finger banana peel, rambutan waste and longan waste were compared using BMP assay and stoichiometric modified Buswell and Mueller equation. Methane yields based on volatile solid (VS) were in the order of ground banana peel, chopped banana peel, chopped longan waste, and chopped rambutan waste (330.6, 268.3, 234.6 and 193.2 mLCH/gVS) that corresponded to their calculated biodegradability. In continuous operations of banana peel digestion at feed concentrations based on total solid (TS) 1-2%, mesophilic single stage digester run at 20-day hydraulic retention time (20-day HRT) failed at 2%TS, but successfully recovered at 1.5%TS. Pre-hydrolysis thermophilic reactor (4-d HRT) was placed as pre-treatment to mesophilic reactor (20-d HRT). Higher biogas (with an evolution of H) and energy yields were obtained and greater system stability was achieved over the single stage digestion, particularly at higher solid feedstock. The best performance of two stage digestion was 68.5% VS destruction and energy yield of 2510.9kJ/kgVS added at a feed concentration of 2%TS.
采用BMP试验以及化学计量学修正的布斯韦尔和米勒方程，比较了热带水果废弃物（即羊角香蕉皮、红毛丹废弃物和龙眼废弃物）的产甲烷潜力。基于挥发性固体（VS）的甲烷产率顺序为：磨碎的香蕉皮、切碎的香蕉皮、切碎的龙眼废弃物和切碎的红毛丹废弃物（分别为330.6、268.3、234.6和193.2 mLCH/gVS），这与它们计算得出的生物降解性相对应。在基于总固体（TS）1%-2%的进料浓度连续进行香蕉皮消化时，中温单级消化器在20天水力停留时间（20天HRT）下，2%TS时运行失败，但在1.5%TS时成功恢复。将预水解高温反应器（4天HRT）作为中温反应器（20天HRT）的预处理。与单级消化相比，获得了更高的沼气（伴有氢气产生）和能量产率，并且实现了更高的系统稳定性，尤其是在较高的固体原料情况下。两级消化的最佳性能是在2%TS的进料浓度下，VS破坏率为68.5%，能量产率为2510.9kJ/kgVS添加量。
