In this study, nanoscale zero valent iron (nZVI) and biochar supported zero valent iron (nZVI/BC) mediated anaerobic digestion of piggery wastewater were investigated. The variation of COD removal rate, methane yield, kinetics modeling and microbial community analysis was analyzed. COD removal rate was increased by 7.46-14.79% respectively for 1, 2, 3 and 4 g nZVI. While COD removal rate was increased by 7.90-12.83% respectively for 1, 2, 3 and 4 g nZVI/BC. Compared with the control group, the accumulated methane yield was increased by 24.17-30.22% and 29.2-46.7% respectively for nZVI and nZVI...
