Response of bamboo biochar amendment on volatile fatty acids accumulation reduction and humification during chicken manure composting

Abstract

Present study was focused on to evaluate the effectiveness of increasing bamboo biochar (BB) (0%, 2%, 4%, 6%, 8% and 10%) amendment on volatile fatty acids (VFAs) degradation and humification, as well as correlation with interrelated physicochemical parameters during chicken manure (CM) composting. The results showed that the extended thermophilic period and higher humic acid/fulvic acid ratio as well as richness bacteria community during CM composting. In addition, lower quantities of VFAs and odor generation with elevated biochar concentration. Redundancy analysis also supported that 10% BB has strong correlation with physicochemical parameters than other treatments. Overall, the 10% BB amendment could stimulate microbial activities to accelerate the organic waste degradation, reduced VFAs and odor emission so that improve hygiene and end product quality. It is notably assessed that application of 10% BB additive were optimal feasible and effectively channel for disposal of manure.

Keywords: Bacterial abundance; Biochar; Humification; Odor index; Volatile fatty acids.