What is the ideal volatile solid reduction percentage aimed for in anaerobic digestion?

The ideal volatile solid reduction percentage aimed for in anaerobic digestion is often around 50-60%. This range is significant as it indicates that a substantial portion of the organic matter present in the substrate is being effectively broken down by the anaerobic microorganisms. Achieving this level of volatile solid reduction is crucial for optimal performance of the anaerobic digestion process, as it ensures that a majority of the biodegradable materials are converted into biogas, primarily methane, and carbon dioxide, along with other potential byproducts.

This level of reduction helps maintain favorable conditions for the anaerobic bacteria, thereby promoting their population growth and activity, which are both key to achieving efficient digestion and maximizing biogas production. It's also a benchmark for assessing the effectiveness of treatment systems, as greater solid reduction generally correlates with improved wastewater treatment outcomes, reduced residual waste, and more efficient resource recovery.