Large amounts of food waste and sewage sludge exert a hazardous environmental impact in several countries. Producing biogas and digestate from food and industrial waste is one of the solutions for waste management, stabilization of sludge, resource and energy recovery and reductions in the amount of waste. However, biogas production from such substrates has challenges in degradation efficiency, inhibitory effects and other challenges, and thus co-digestion and pretreatment techniques could be applied to enhance biogas production. The aim of this study is to explore the effects of co-digestion of food waste, meat and bone meal and rendering wastewater sludge. First, thermal pretreatment was performed (35°C, 5 days) by adding the rendering-industry streams to food waste in the amounts of 0, 5, 10 and 15% on a total solid basis, and further anaerobic digestion (40.5°C, ca. 40 days) was then performed. Both experimental and kinetic analysis were conducted, and the major factors regarding opportunities and challenges in the two-stage process are discussed. Results have shown that both co-substrates from rendering industry decreased the biogas yield of food waste. When 5% of them was added to food waste, meat and bone meal decreased biogas production by 12%, and wastewater sludge decreased it by 23%. Both co-substrates, on the other side, increased the rate of reaction of food waste digestion when applying different common kinetic models.

大量的食物垃圾和污水污泥在一些国家对环境造成了有害影响。从食品和工业废物中产生沼气和消化物是废物管理，污泥稳定化，资源和能源回收以及减少废物量的解决方案之一。然而，从这样的底物产生沼气在降解效率，抑制作用和其他挑战方面具有挑战性，因此可以使用共消化和预处理技术来提高沼气的产生。这项研究的目的是探索共同消化食物垃圾，肉和骨粉以及使废水产生污泥的效果。首先，进行热处理（35°C，5天），方法是将提炼工业流添加到食物残渣中，其总固体含量为0、5、10和15％，然后进一步进行厌氧消化（40.5°C，约40天）。进行了实验和动力学分析，并讨论了两阶段过程中有关机遇和挑战的主要因素。结果表明，提炼业的两种共同基质均降低了食物垃圾的沼气产量。当将其中的5％添加到食物垃圾中时，肉和骨粉将沼气产生量减少了12％，废水污泥将其减少了23％。另一方面，当使用不同的通用动力学模型时，两种共底物都可以提高食物垃圾消化的反应速度。结果表明，提炼业的两种共同基质均降低了食物垃圾的沼气产量。当将其中的5％添加到食物垃圾中时，肉和骨粉将沼气产生量减少了12％，废水污泥将其减少了23％。另一方面，当使用不同的通用动力学模型时，两种共底物都可以提高食物垃圾消化的反应速度。结果表明，提炼业的两种共同基质均降低了食物垃圾的沼气产量。当将其中的5％添加到食物垃圾中时，肉和骨粉将沼气产生量减少了12％，废水污泥将其减少了23％。另一方面，当使用不同的通用动力学模型时，两种共底物都可以提高食物垃圾消化的反应速度。