MATHEMATICAL MODELLING OF A TWO-STAGE ANAEROBIC DIGESTION PROCESS WITH HYDROGEN AND METHANE PRODUCTION USING ADM1-Reference-Cited by-同舟云学术

MATHEMATICAL MODELLING OF A TWO-STAGE ANAEROBIC DIGESTION PROCESS WITH HYDROGEN AND METHANE PRODUCTION USING ADM1

Published:2020-05-20 Issue: Volume: Page:18-29
ISSN:
Container-title:Ecological Engineering and Environment Protection
language:
Short-container-title:EEEP

Author:

Borisov Milen¹,Denchev Dencho²,Simeonov Ivan²

Affiliation:

1. Institute of Mathematics and Informatics, Bulgarian Academy of Sciences

2. The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences

Abstract

The aim of this study is to implement a mathematical model to simulate the dynamic behaviour of a two-stage anaerobic digestion process for simultaneous production of hydrogen and methane. The process is carried out in two connected continuously stirred bioreactors. The proposed model is developed by reducing the well known IWA Anaerobic Digester Model No 1 (ADM1). In the present study the original model concept was adapted and applied to replicate a two-stage process. The proposed model involves 13 ODEs for the 1st stage and 7 ODEs for the 2nd stage. The numerical coefficient values in the model are taken from specified literature and adapted to the case of wheat straw AD. Important input-output static characteristics and existence of maxima of the input-output static characteristics concerning the biohydrogen and biomethane production in function of the control variable (dilution rate) are presented. Supposing that both bioreactors are operating nearby these maxima the optimal ratio of the working volumes was obtained. Numerical simulations using a specially elaborated web-based software environment are presented to demonstrate the dynamic behavior of the model solutions.

Funder

Bulgarian National Science Fund

Publisher

National Society of Ecological Engineering and Environment Protection

Reference46 articles.

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