| Abstrakt: |
The characteristics of anaerobic co-digestion of organic fraction of municipal solid waste (OFMSW), thickened waste activated sludge (TWAS) and rice straw (RS) were investigated in this study. The batch experiment was conducted under mesophilic (37±1°C) conditions in two groups, that is, (OFMSW with TWAS co-digestion), and (OFMSW, TWAS, and RS co-digestion) along with three different (volume basis) ratios of (1:3, 1:1, and 3:1) and (1:1.5:1.5, 1:0.5:0.5, and 3:0.5:0.5), respectively.The batch test evaluated the biogas potential, and biogas production rate of the OFMSW co-digestion with TWAS with/without RS at different mixing ratios. The first-order kinetic model and modified Gompertz model were also introduced to predict the biogas yield and evaluate the kinetic parameters.The optimum mixing ratios of OFMSW with TWAS and TWAS and RS were 3:1 and 3:0.5:0.5, the cumulative biogas yields (CBY) were 552.9 and 536.1 mL/g VSadded,which is greater by (153.4% and 185.9%) and (145.7%, 177.2% and 128.7%) than that of digesting OFMSW, TWAS and RS alone, respectively. The modified Gompertz model (R2: 0.993--0.999) showed a better fit to the experimental results and the calculated parameters indicated that the codigestion of OFMSW, TWAS with/without RS markedly improved the biogas production rate. [ABSTRACT FROM AUTHOR] |
