Effects of Di-N-Butyl Phthalate on Material Conversion and Bacterial Community Dynamics During Aerobic Composting of Agricultural Waste

Phthalic acid esters (PAEs) pollution has become a major environmental problem in agricultural waste composting. However, little information was available about the how the PAEs alter bacterial community during composting. This study was firstly investigated the effects of di-n-butyl phthalate (DBP) on material conversion and bacterial community dynamics during composting. The results showed that a decreasing of DBP was observed from thermophilic phase and 43.26% DBP was degraded after composting. The bacterial biomass and diversity during composting were reduced under DBP stress, so delaying the decomposition of organic matter. Moreover, the changes in bacterial community were observed since the thermophilic phase of DBP-contaminated composting. KEGG pathway analysis indicated that the relative abundance of the main metabolic pathways decreased under DBP stress. Moreover, DBP concentrations had more significant correlation with the dominant bacteria. This work will expand the understanding of PAEs-contaminated organic waste composting and further control of PAEs pollutants