Effect of Fenton pretreatment combined with bacterial inoculation on humification characteristics of dissolved organic matter during rice straw composting

Abstract The main purpose of this study was to explore the effects of Fenton pretreatment combined with bacterial inoculation on humification characteristics of dissolved organic matter (DOM) during rice straw composting. Three treatment groups (Fenton pretreatment: FeW, Fenton pretreatment and bacterial inoculation: FeWI, control: CK) were carried out during composting. The results showed that total organic carbon concentration of DOM and HIX showed an increase trend in all treatments in the composting process. The fungi that affect DOM conversion showed remarkable effects, meanwhile, fungal numbers of influencing DOM conversion were higher for FeWI than CK and FeW. The contribution rate of fungi to DOM was greater than that of environmental factors in FeWI composting, while environmental factors accounted for a large proportion in FeW and CK composting. This study exhibits referential significance for the effective degradation of agricultural wastes.