Data Driven Modelling and Control Strategies to Improve Biogas Quality and Production from High Solids Anaerobic Digestion: A Mini Review

Abstract

Anaerobic Digestion (AD) is one of the oldest processes for producing biofuels from organic waste. Approximately 180 years have passed since the construction of the first modern plant, however, large prospects for improvement are still feasible, especially in regards to the quality and uniformity of the biogas produced. This work focalizes on the main quality issues and the available post-production treatment processes for biogas; subsequently, a mini-review on data-driven models and control strategies for biogas and bio-methane production plants is presented. Attention is focused on High Solids Anaerobic Digesters (HSADs), since these reactors present many interesting advantages, including a high number of operating variables which enable process optimization, high methane concentration in exit, reduced reactor volume and low water requirements. HSADs are the reactors with which Europe is aiming to rapidly increase the production of biogas and bio-methane, in order to carry out de-carbonization and reduce dependence on external methane imports. Crucial points for achieving these objectives include qualitative leaps in process operation and management, which, contrary to current practice in existing plants, require a significant increase in process automation, with control of product quality and reduction of stops due to death of bacteria at changing process parameters (such as temperature and pH). The most significant papers related to biogas quality, data-driven models and control strategies are briefly analyzed.

Anaerobic Digestion of Food Waste—A Short Review

“…In turn, con (Figure 2D) is a system in which food waste is supplied to the system cont simultaneous removal of the digested waste before a fresh portion is adde recirculation and the use of a continuous agitator are permitted in this me system is designed for continuous operation. The system's advantages in quirements for the volume of the process vessel in which biogas is collecte of the biogas obtained, continuous feeding of biomass with a simultaneous biogas and digestate [68], a low demand for water and less need to supp reactor [70].…”

“…The system is designed for continuous operation. The system's advantages include low requirements for the volume of the process vessel in which biogas is collected, high quality of the biogas obtained, continuous feeding of biomass with a simultaneous generation of biogas and digestate [68], a low demand for water and less need to supply heat to the reactor [70].…”

Aproveitamento de dejeto bovino para a produção de biogás

“…É usual encontrar referências bibliográficas descrevendo a composição típica do biogás apenas em (%) (Mignogna et al, 2023;Paladino, 2022;Abubakar, Silas, and Aji, 2022).…”

Simulation of the Working Volume Reduction through the Bioconversion Model (BioModel) and Its Validation Using Biogas Plant Data for the Prediction of the Optimal Reactor Cleaning Period

“…Phenomenological models, which are data-driven and usually based on machine learning (ML) techniques, and 2. Mechanistic models, which are based on process principles described by differential and algebraic equations [22,23]. The latter category includes two widely used models: the Anaerobic Digestion Model No.…”