Humic acid biosynthesis and bacterial community evolution during aerobic composting of rice straw.

ABSTRACT: In this study, the effects of inoculum ratio, substrate particle size and aeration rate on humic acid (HA) biosynthesis during aerobic composting of rice straw were investigated, respectively. The contents of total organic carbon, total nitrogen and HA, as well as lignocellulose degradation in the composting were evaluated, respectively. It is found that the maximal HA yield of 356.9 g kg^-1 was obtained at an inoculum ratio of 20%, a substrate particle size of 0.83 mm and an aeration rate of 0.3 L·kg^-1 DM min^-1 in the process of composting. The changes of microbial communities and metabolic functions at different stages of the composting were also analyzed through high-throughput sequencing. The result demonstrates that Proteobacteria, Firmicutes, Bacteroid

SUBMITTER: Gao Y 

PROVIDER: S-EPMC10817993 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature