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A study of the kinetics and the effect of trace elements on mixed anaerobic fermentative biogas production by ternary quadratic general rotary unitized design

机译：三元二次通用旋转联合设计研究混合厌氧发酵沼气的动力学及微量元素影响

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ABSTRACT In this study the effect of trace elements on methanogenesis was investigated during mixed anaerobic fermentation using a single-factor experiment in the present study. The most effective concentrations of Fe 0 , Fe 2+ , Co 2+ and Ni 2+ that were added were 1500, 250, 0.3 and 0.6 mg/L, respectively. The optimal trace element combination was 0.58 mg/L Ni 2+ , 1200 mg/L Fe 0 and 0.34 mg/L Co 2+ by the ternary quadratic general rotary unitized design method. The degree of influence exerted by trace elements on the cumulative methane yields decreased in the order of Ni 2+ , Fe 0 and Co 2+ , and the maximum CH 4 yield was 241.6 mL/g volatile solids (VS), according to a regression equation. The non-dissolved organic carbon hydrolytic process showed a good fit with the first-order kinetic model. The maximum value of CH 4 was 312.87 mL/g VS. Compared to the control, the bioconversion efficiencies of CH 4 and CO 2 production increased by 36.76% and 74.50%, respectively, at the optimal trace element combination. The obtained results provide new knowledge for improvements in the efficiency of anaerobic fermentation biogas production.
机译：摘要在本研究中，使用单因素实验研究了混合厌氧发酵过程中微量元素对甲烷生成的影响。 Fe 0，Fe 2+，Co 2+和Ni 2+的最有效浓度分别为1500、250、0.3和0.6 mg / L。通过三元二次通用旋转联合设计方法，最佳微量元素组合为0.58 mg / L Ni 2+，1200 mg / L Fe 0和0.34 mg / L Co 2+。根据回归，痕量元素对甲烷累积产量的影响程度按Ni 2+，Fe 0和Co 2+的顺序降低，最大CH 4产量为241.6 mL / g挥发性固体（VS）。方程。非溶解性有机碳水解过程与一级动力学模型吻合良好。 CH 4的最大值为312.87 mL / gVS。与对照相比，在最佳微量元素组合下，CH 4和CO 2产生的生物转化效率分别提高了36.76％和74.50％。所得结果为提高厌氧发酵沼气生产效率提供了新知识。

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