Introducing CHAD -- An ADM1 Solver for Direct Linking to Lagrangian CFD Software

TL;DR

This paper introduces CHAD, a software toolbox that integrates CFD results with ADM1 models for more accurate anaerobic digestion process simulations, enabling detailed hydrodynamic analysis.

Contribution

The novel contribution is the development of a parallelized solver that directly links Lagrangian CFD outputs with ADM1 models, improving simulation fidelity.

Findings

Successful conceptual verification of CHAD

Numerical validation demonstrating accuracy

Framework for future enhancements

Abstract

Standard methods for modeling anaerobic digestion processes assume homogeneous conditions inside the tank and thus suffer from the negligence of hydrodynamics. In this work, we present the software toolbox Coupled Hydrodynamics and Anaerobic Digestion (CHAD), a novel parallelized solver that is capable of utilizing CFD results as the basis for Anaerobic digestion model No.1 (ADMno1) simulations. CHAD uses a particle-based Lagrangian CFD solver i.e., DualSPHysics (DSPH) as input and provides for a parallelized, C++ code implementation of the standard ADMno1. This paper demonstrates a conceptual and numerical verification of the toolbox and outlines the future pathway to enhance the approach.