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Modified version of ADM1 model for agro-waste application.

A Galí¹, T Benabdallah, S Astals

¹Department of Chemical Engineering, University of Barcelona, Martí i Franquès, No. 1, 6th Floor, 08028 Barcelona, Spain.

Bioresource Technology

|February 10, 2009

Summary

A new model simulates anaerobic digestion of agro-residues, crucial for waste treatment. This reliable tool aids in designing and operating facilities for processing agricultural wastes.

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Spatial Multiobjective Optimization of Agricultural Conservation Practices using a SWAT Model and an Evolutionary Algorithm

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Published on: December 9, 2012

Area of Science:

Environmental Science
Biotechnology
Chemical Engineering

Background:

Agro-residues constitute a significant global waste stream.
Effective treatment methods are essential for managing agricultural waste.
Anaerobic digestion is a key biological process for waste valorization.

Purpose of the Study:

To develop and validate a mathematical model for simulating anaerobic digestion of agro-residues.
To adapt the Anaerobic Digestion Model No. 1 (ADM1) for diverse agricultural waste streams.
To assess the biodegradability and kinetic parameters of various agro-waste substrates.

Main Methods:

Model development based on ADM1, incorporating specific agro-residue characteristics.
Biodegradability testing of substrates including apple, pear, orange, rape, sunflower, pig manure, and glycerol.
Calculation of particulate chemical oxygen demand (COD) fractions and determination of the disintegration constant.
Validation of the model using batch tests and a lab-scale continuous anaerobic reactor fed with pig manure.

Main Results:

The model successfully simulated anaerobic digestion under mono- and co-substrate conditions.
Satisfactory correlation was achieved between model predictions and experimental results from batch tests.
The model demonstrated good agreement with data from a continuous reactor treating pig manure.

Conclusions:

The developed anaerobic digestion model is a reliable tool for simulating agro-residue treatment.
The model can be effectively used for the design and operational management of anaerobic digestion plants.
Accurate parameterization, including biodegradability and disintegration, is critical for model performance.