Microbial communities in typical stages of composting

Cow dung and wheat straw are rich in lignocellulose, which has a complex structure and composition, making it difficult to biodegrade. This study investigated the promotion of composting effectiveness and product fertility by adding nano-bubbling water (Air, CO2, He, N2) during aerobic composting. The addition of different nano-bubbling water prolonged the high-temperature period by 1~2 days, reduced lignocellulose content by 1.4%~6.1%, and increased total potassium/total phosphorus of compost product by 1.8%~3.5%/31.6%~43.0%. Lignocellulose content was significantly positively correlated with moisture content, while significantly negatively correlated with the relative abundance of Georgenia and Marinimicrobium. Compost with the addition of nano-bubbling water significantly increased the total biomass of cabbage by 37.1%~195.3%. The results showed that adding nano-bubbling water during aerobic composting improved composting effectiveness and product fertility by enhancement of lignocellulose biodegradation.