A review of the kinetics of the methanogenic fermentation of lignocellulosic wastes |
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| Institution: | 1. Previously at Buildings and Livestock Division, AFRC Institute of Engineering Research, Wrest Park, Silsoe, Bedford MK45 4HS, UK;2. Now at Anotec Separations, Beaumont Business Centre, Beaumont Close, Banbury, Oxon., UK;1. Doctoral Program, School of Engineering Sciences, Universitas Syiah Kuala, Darussalam, Banda Aceh, 23111, Indonesia;2. Reaction Engineering and Catalysis Laboratory, Department of Chemical Engineering, Universitas Syiah Kuala, Darussalam, Banda Aceh, 23111, Indonesia;3. Faculty of Engineering, Universitas Serambi Mekkah, Banda Aceh, 23245, Indonesia;1. Departamentode Ingeniería Química, Universidad de Córdoba, Facultad de Ciencias, Edificio Marie Curie, Campus Universitario de Rabanales, 14071 Córdoba, Spain;2. Departamento de Informática y Análisis Numérico, Universidad de Córdoba, Escuela Politécnica Superior, Edificio Leonardo da Vinci (CTI), Campus Universitario de Rabanales, 14071 Córdoba, Spain;1. School of Life Science and Biotechnology, Dalian University of Technology, Dalian, Liaoning 116024, China;2. College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu 215123 China |
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| Abstract: | A review is presented of the kinetic models developed for simulating the anaerobic digestion process when treating lignocellulosic wastes. Four basic types of model are identified: Monod, Modified Monod, First Order and Modified Contois. The Monod model, based upon the principles of saturation kinetics, is the model most extensively used. The Modified Monod model incorporates a modified form of saturation kinetics allowing for end product inhibition effects. The First Order model is the simplest type produced. The Modified Contois model is based upon Contois microbial kinetics and is effective at predicting process performance during steady state.None of the models is adequate for the simulation of dynamic state processes. Moreover with all four types of model it is assumed that the primary microbial substrate is soluble, whereas in fact, many agricultural wastes contain high concentrations of suspended insoluble organics.Some recent developments in modelling, applicable to anaerobic digestion, allow better simulations but there is still considerable potential for improvement. |
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