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Open Access The Dynamic Anaerobic Reactor & Integrated Energy System (DARIES) Model: Model Development, Validation, and Sensitivity Analysis

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The Dynamic Anaerobic Reactor & Integrated Energy System (DARIES) model has been developed as a biogas and electricity production model of a dairy farm anaerobic digester system. DARIES, which incorporates the Anaerobic Digester Model No. 1 (ADM1) and simulations of both combined heat and power (CHP) and digester heating systems, may be run in either completely mixed or plug flow reactor configurations. DARIES biogas predictions were shown to be statistically coincident with measured data from eighteen full-scale dairy operations in the northeastern United States. DARIES biogas predictions were more accurate than predictions made by the U.S. AgSTAR model FarmWare 3.4. DARIES electricity production predictions were verified against data collected by the NYSERDA DG/CHP Integrated Data System. Preliminary sensitivity analysis demonstrated that DARIES output was most sensitive to influent flow rate, chemical oxygen demand (COD), and biodegradability, and somewhat sensitive to hydraulic retention time and digester temperature.

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Keywords: ADM1; Anaerobic digestion; Dairy manure; FarmWare; Mathematical modeling; Sensitivity analysis

Document Type: Research Article

Affiliations: Institute for a Sustainable Environment, Clarkson University, Box 5715, 8 Clarkson Ave., Potsdam, NY 13699

Publication date: 2012-12-01

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