Optimization of trace elements using response surface methodology (RSM) for biogas production in dry anaerobic digestion

LI Hongli; CAO Feifei; WANG Yan

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Optimization of trace elements using response surface methodology (RSM) for biogas production in dry anaerobic digestion

LI Hongli 1 * #,CAO Feifei 2,WANG Yan 2

1.School of Chemical Engineering and Energy, Zhengzhou University, 450001

2.School of Chemical Engineering and Energy, Zhengzhou University, 450001

*Correspondence author

#Submitted by

Subject:

Funding: The international project of Zhengzhou technology Grant （No.No.083SGHH3329-8）

Opened online:31 January 2013

Accepted by: none

Citation: LI Hongli,CAO Feifei,WANG Yan.Optimization of trace elements using response surface methodology (RSM) for biogas production in dry anaerobic digestion[OL]. [31 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4518256

The effect of trace elements (Fe、Co and Ni) on mesophilic dry anaerobic digestion was investigated in this study. Response surface methodology (RSM), based on a three-level Box-Behnken Design with the Design-Expert Software, was employed in order to obtain the optimal concentrations of trace elements. The experiment results demonstrated that the optimized concentrations of trace elements were 15.0 mg FeoL-1, 1.0 mg CooL-1, 1.2 mg NioL-1, respectively. Under the optimized condition, the maximum accumulated biogas reached 7895.28 mL in mesophilic dry anaerobic digestion, which was consistent with the predicted value by the second-order polynomial model.

Keywords:Trace elements; Response surface methodology; Dry anaerobic digestion; Biogas.

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