Gu, et al (2024) Regulating bacterial dynamics by Mg-modified biocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More addition to mitigate gaseous emissions during pig manure composting. Journal of Cleaner Production. https://doi.org/10.1016/j.jclepro.2024.142839

Recent research published in the Journal of Cleaner Production explores the innovative use of magnesium-modified biochar (MBC) to tackle gaseous emissions during pig manure composting. Researchers Xuhan Gu, Hui Li, Yixun Shi, Jijin Li, and Shuyan Li discovered that modifying biochar with magnesium significantly enhances its properties, making it an effective additive for reducing harmful emissions like ammonia (NH3), methane (CH4), and nitrous oxide (N2O).

The study tested various ratios of magnesium to biochar, finding that a 0.50 ratio (MBC-0.50) performed best. This specific MBC not only improved composting efficiency but also significantly reduced emissions. The reduction of NH3 emissions was particularly notable, achieved through the formation of struvite crystallization (MgNH4PO4·6H2O) and the enhanced adsorption properties of the biochar.

Moreover, the study highlighted how MBC influences bacterial dynamics. Both pristine and modified biochars inhibited the growth of bacteria responsible for producing N2O and CH4. This bacterial suppression, alongside the MBC’s physical and chemical properties, helped mitigate greenhouse gas emissions during composting.

This research offers valuable insights into using MBC as a cost-effective and environmentally friendly solution to improve composting processes and reduce harmful emissions. As the world seeks sustainable waste management practices, Mg-modified biochar presents a promising avenue for cleaner and more efficient composting.