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Experimental and kinetic study on anaerobic co-digestion of poultry manure and food waste

机译：家禽粪便和食物垃圾厌氧消化的实验和动力学研究

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摘要

Enhancement of biogas production by adding external substrates as a co-digestion material is one of the solution to increase energy self-sufficiency of the anaerobic digestion process. The aim of this work is to analyze the impact of anaerobic co-digestion of poultry manure with food waste on the biogas production. Experiments were conducted on a range of 0, 10, 20, 30 and 40% of poultry manure with 100, 90, 80, 70 and 60% of food waste (CD0, CD10, CD20, CD30 and CD40) respectively. Five laboratory scale batch reactors of capacity 2 L were used for this work. The solid concentration, pH and temperature values taken in all the reactors were 7.5% of total solids, 7 pH and 50 degrees C respectively. It was observed that the highest cumulative biogas yield of 8469 mL and methane concentration of 62.03% were obtained with the co-digested substrate CD30 (30% of poultry manure with 70% of food waste), whereas 7556 mL was obtained with raw food waste (CD0). The degradation efficiencies (TS, VS and COD) were also higher for CD30 compared to the other four substrates. First order kinetic model, modified Gompertz model and Logistic model were evaluated for the biogas yield and the predicted results were compared with the experimental results.
机译：通过添加外部底物作为共消化材料来提高沼气产量是增加厌氧消化过程能量自给自足的解决方案之一。这项工作的目的是分析家禽粪便与食物垃圾的厌氧共消化对沼气生产的影响。实验分别在0％，10％，20％，30％和40％的家禽粪便中进行，分别有100％，90％，80％，70％和60％的食物垃圾（CD0，CD10，CD20，CD30和CD40）。这项工作使用了5个容量为2 L的实验室规模的间歇反应器。在所有反应器中获得的固体浓度，pH和温度值分别为总固体的7.5％，7个pH和50摄氏度。观察到，共同消化的底物CD30（30％的家禽粪便和70％的食物垃圾）获得最高的累计沼气产量8469 mL和甲烷浓度为62.03％，而未加工的食物垃圾获得7556 mL （CD0）。与其他四种基材相比，CD30的降解效率（TS，VS和COD）也更高。评估了沼气产量的一阶动力学模型，改进的Gompertz模型和Logistic模型，并将预测结果与实验结果进行了比较。

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