Effect of total solids contents on the performance of anaerobic digester treating food waste and kinetics evaluation

The effects of total solids (TS) content on the performance anaerobic digestion (AD) treating food waste (FW) and kinetic characteristics were investigated in mesophilic batch reactors. results showed that FW could be digested normally AD system within TS 3%-30%. volume methane yield dry-AD increased by 5.2-10.6 times than wet-AD degradation time unit substrate was shortened 35%-71%. stability indicators dry-AD, such as pH, VFA/TA, TAN salt remain suppression threshold after digestion. had obvious advantages. analysis ADM1 used to simulate reactor FW, accurately simulated production different systems calibrating. With increase TS, hydrolysis a tendency first then decrease, but decrease rate higher methanogene. Increasing simultaneously weaken methanation rate, effect acidification phase weaker. ratio constant methanogenic Monod maximum specific absorption (khy/km_ac) new perspective evaluate balance between stage stage. show khy/km_ac 15% 20% experimental groups close 1. It can speculated 15%-20% recommended value engineering design treat FW. Within this range, dynamics matching, accumulation inhibitors is also relatively moderate state threshold.