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Anaerobic co-digestion of leachate and glycerol for renewable energy generation
Environmental Technology ( IF 2.2 ) Pub Date : 2020-09-14 , DOI: 10.1080/09593330.2020.1818832
Paula Yumi Takeda 1 , Jackeline Tatiane Gotardo 1 , Simone Damasceno Gomes 1
Affiliation  

ABSTRACT

Anaerobic digestion is a versatile biotechnology that produces bioenergy, biogas, from wastewater. Biogas production and wastewater treatment can be optimized by associating substrates with complementary characteristics. In this context, the aim of this study was to evaluate the performance of the anaerobic co-digestion of different contents of landfill leachate and crude glycerol compared to the organic matter removal and specific biogas production, the effects of the factors (time, glycerol content and substrate/inoculum ratio) and their interactions on kinetic parameters of specific biogas production using the modified Gompertz model. A Central Composite Rotational Design (CCRD) was performed for the experimental variables: time (16.6, 20, 25, 30 and 33.4 days), glycerol content (0.43, 0.70, 1.10, 1.50 and 1.77%) and substrate/inoculum ratio (0.23, 0.30, 0.40, 0.50 and 0.57 g COD/g VSS). From the optimization, it was possible to maximize the efficiency of organic matter removal (90.15%) and specific biogas production (403.15 mL/g VSS) in the conditions of 33.2 days, glycerol content of 1.71% and substrate/inoculum ratio of 0.37 g COD/g VSS. Concerning the modified Gompertz model of the optimal condition performed, an average of 20.3 times higher specific biogas production was obtained when compared to the monodigestion of leachate. Therefore, the association of leachate and glycerol was found to be feasible in terms of stability, biodegradability and biogas production.



中文翻译:

渗滤液和甘油的厌氧共消化用于可再生能源发电

摘要

厌氧消化是一种多功能的生物技术,可以从废水中产生生物能源、沼气。通过将具有互补特性的底物关联起来,可以优化沼气生产和废水处理。在此背景下,本研究的目的是评估不同含量垃圾渗滤液和粗甘油的厌氧共消化性能与有机物去除率和特定沼气产量的比较,以及因素(时间、甘油含量)的影响。和底物/接种物比)及其对使用改进的 Gompertz 模型的特定沼气生产的动力学参数的相互作用。对实验变量进行中心复合旋转设计 (CCRD):时间(16.6、20、25、30 和 33.4 天)、甘油含量(0.43、0.70、1.10、1.50 和 1.77%)和底物/接种物比(0 . 23、0.30、0.40、0.50 和 0.57 g COD/g VSS)。从优化结果来看,在 33.2 天、1.71% 甘油含量和 0.37 g 底物/接种物比的条件下,有机物去除效率 (90.15%) 和比沼气产量 (403.15 mL/g VSS) 可以最大化COD/g VSS。关于最佳条件的修正 Gompertz 模型,与渗滤液的单一消化相比,获得的比沼气产量平均高出 20.3 倍。因此,发现渗滤液和甘油的结合在稳定性、生物降解性和沼气产量方面是可行的。2 天,甘油含量为 1.71%,底物/接种物比为 0.37 g COD/g VSS。关于最佳条件的修正 Gompertz 模型,与渗滤液的单一消化相比,获得的比沼气产量平均高出 20.3 倍。因此,发现渗滤液和甘油的结合在稳定性、生物降解性和沼气产量方面是可行的。2 天,甘油含量为 1.71%,底物/接种物比为 0.37 g COD/g VSS。关于最佳条件的修正 Gompertz 模型,与渗滤液的单一消化相比,获得的比沼气产量平均高出 20.3 倍。因此,发现渗滤液和甘油的结合在稳定性、生物降解性和沼气产量方面是可行的。

更新日期:2020-09-14
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