Soil amendment

Digestate, a byproduct of anaerobic digestion, is increasingly recognized as a sustainable alternative to chemical fertilizers. Research shows it can enhance soil microbial biomass, nutrient availability, and plant performance without harming soil quality. However, untreated or poorly monitored digestates may contain contaminants—especially heavy metals—that pose environmental and health risks. While they can promote beneficial soil bacteria, strict quality control and post-treatment are essential. This review highlights their potential as fertilizers and soil enhancers, emphasizing the need for stronger regulations, particularly in regions like Latin America.