Journal
WATER RESEARCH
Volume 129, Issue -, Pages 384-393Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2017.11.012
Keywords
Biogas technology; Wet digestion of biowaste; Mathematical modeling; ADM1 and ADM1xpro; Propionate oxidizing bacteria
Funding
- German Research Foundation (Deutsche Forschungsgemeinschaft DFG) [Ga-546/4-2]
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Anaerobic digestion of biowaste not only reduces environmental burden but also plays an important role for sustainable energy supply. For process optimization simulation based on the Anaerobic Digestion Model No.1 (ADM1) is commonly used. The ADM1 was extended to include the known three genera of propionate oxidizing bacteria (POB) and the two routes of propionate degradation (methyl-malonyl CoA and C6-dismutation pathway). Kinetic parameters for anaerobic propionate oxidation by single strains of the three propionate oxidizing genera were determined from defined tri-cultures of the POB with hydrogenotrophic and acetotrophic methanogens and implemented into ADM1. The such improved model ADM1xpro was evaluated with operational data from a full scale wet biowaste digestion plant. Predicted amounts of biogas and composition with ADM1xpro (2201 m(3) (d(-1), 68.1 % CH4 and 31.9 % CO2) correlated well with full-scale process data (2171 m(3) d(-1,) 67.5 % CH4 and 31.9 % CO2). (C) 2017 Elsevier Ltd. All rights reserved.
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