Predicting the humification degree of multiple organic solid waste during composting using a designated bacterial community.

• The bacterial communities can be used as ecological and biological indicators. • The bacterial communities correctly determined the categories of OSWs with 94%. • The bacterial codes can provide a better prediction of humification degree. Microbes are the drivers for disposing of organic solid waste (OSW) during aerobic fermentation. Notwithstanding, the significance of microbes is underestimated in numerous studies on aerobic fermentation product assessments. Here, we investigated the humification degree (HD), and the humic acid content was assessed in terms of the bacterial community. The bacterial communities were useful indicators for making predictions and even correctly determined the categories of OSWs with 94% accuracy. The bacterial codes can also provide a better prediction of HD. Our results demonstrate that the bacteria code is a reliable biological method to assess HD effectively. Bacterial codes can be used as ecological and biological indicators to evaluate the quality of aerobic fermentation of different materials. [ABSTRACT FROM AUTHOR]