Strategies to improve production of biomethane from organic wastes with anaerobic co‐digestion: a systematic review

Abstract

Anaerobic digestion is a technology that converts complex organic matter into another form of matter, from which energy can be more easily extracted. The stability and digestion of anaerobic co-digestion with multiple raw materials as substrates is better than the performance of anaerobic mono-digestion. In the past two decades, there has been a large amount of literature on how to improve the performance of methane production in the anaerobic co-digestion process, but few systematic reviews have been conducted. This paper summarizes the factors affecting the development of anaerobic co-digestion. The process parameters, substrate optimization strategy, microbial community, and model application for improving anaerobic co-digestion performance were systematically analyzed. Methane purification technology and policies to support digestion projects are also discussed. At present, the technological process is basically mature, but the interaction between various parameters can be studied in depth. Methane purification technology expands the market for the biogas industry and increases its economic benefits. Policy is the key to promoting process technology and the methane market.

Enhancing Biogas Production of Co-Digested Cattle Manure with Grass Silage from a Local Farm in Landshut, Bavaria, through Chemical and Mechanical Pre-Treatment and Its Impact on Biogas Reactor Hydraulic Retention Time

“…The AD of manure provides low biogas yields because the main energy content is removed during animal digestion [29]. Anaerobic digestion combining two or more raw substrates, co-digestion [30], is considered a way to improve the biogas yields, as the different substrates present positive synergism and complement nutrients [31], solving imbalanced nutrition, poor buffering capacity and ineffective microorganisms associated with mono digestion [29].…”

Enhancing Methane Production through Anaerobic Co-Digestion of Sewage Sludge: A Modified ADM1 Model Approach

“…The Modified ADM1 Model applied to the anaerobic co-digestion of sewage sludge for methane production serves as a valuable tool for understanding and optimizing the complex interactions and processes involved in waste-to-energy technology. The modified ADM1 model accounts for the co-digestion of sewage sludge with organic substrates, introducing greater complexity and complexity [29]. This model can simulate interactions between different substrates and their impact on methane production.…”