Mauá School of Engineering, Mauá Institute of Technology (EEM/IMT), Praça Mauá 1, São Caetano do Sul, SP, 09.580-900, Brazil.
Appl Biochem Biotechnol. 2019 Jan;187(1):28-46. doi: 10.1007/s12010-018-2802-7. Epub 2018 Jun 7.
The most common approach to deal with vinasse (sugarcane stillage) is fertigation, but this technique compromises soil structure and surrounding water bodies. A possible solution is to transport vinasse to local cheese whey producers and perform the co-digestion of these wastewaters together, reducing their organic load and generating bioenergy. Therefore, this study investigated the application of an AnSBBR (anaerobic sequencing batch biofilm reactor) operated in batch and fed-batch mode, co-digesting vinasse and whey at 30 °C. The effect of influent composition and feeding strategy was assessed. In all conditions, the system achieved high organic matter removal (approximately 83%). Increasing the percentage of vinasse from 0 to 100% in the influent resulted in a decrease in methane productivity (76.3 to 51.1 molCH m day) and yield (12.7 to 9.1 molCH kgCOD), but fed-batch mode operation improved reactor performance (73.0 molCH m day and 11.5 molCH kgCOD). From the kinetic metabolic model, it was possible to infer that, at the best condition, methane is produced in a similar way from the acetoclastic and hydrogenotrophic routes. A scheme of four parallel reactors with a volume of 16,950 m each was proposed in the scale-up estimation, with an energy recovery estimated in 28,745 MWh per month.
最常见的处理方法是用糖蜜（甘蔗渣）进行灌溉，但这种技术会损害土壤结构和周围水体。一种可能的解决方案是将糖蜜运输到当地奶酪乳清的生产商，并进行这些废水的共消化，从而降低它们的有机负荷并产生生物能源。因此，本研究调查了在 30°C 下，采用间歇式和分批式运行的 AnSBBR（厌氧序批式生物膜反应器）来共消化糖蜜和乳清的应用。评估了进水组成和进料策略的影响。在所有条件下，系统均实现了高有机物去除率（约 83%）。进水的糖蜜比例从 0 增加到 100%，导致甲烷产率（76.3 至 51.1molCH m day）和产率（12.7 至 9.1molCH kgCOD）降低，但分批进料模式操作改善了反应器性能（73.0molCH m day 和 11.5molCH kgCOD）。根据动力学代谢模型，可以推断出在最佳条件下，甲烷通过乙酰营养和氢营养途径以相似的方式产生。在放大估计中，提出了一个由四个平行的、每个 16950m 的体积的反应器组成的方案，估计每月可回收能源 28745MWh。
