Effect of inoculum to substrate ratio (IS) on municipal solid waste anaerobic degradation kinetics and potential

被引:82
作者
Boulanger, Anthony [1 ,2 ]
Pinet, Elisabeth [2 ]
Bouix, Marielle [3 ]
Bouchez, Theodore [2 ]
Mansour, Alicia A. [1 ]
机构
[1] VERI, F-78520 Limay, France
[2] Irstea, Hydrosyst & Bioproc Unit, F-92163 Antony, France
[3] AgroParisTech, UMR Genie & Microbiol Proc Alimentaires, F-78850 Grignon, France
关键词
Reconstituted municipal solid waste; Mesophilic conditions; Inoculum; Dissolved organic carbon; ARISA; alpha app; DIGESTION; BACTERIAL; REACTOR;
D O I
10.1016/j.wasman.2012.07.024
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The goal of this study is to evaluate the impact of the inoculum to substrate ratio (I/S) on the anaerobic degradation potential of municipal solid waste (MSW). Reconstituted MSW samples were thus incubated under batch anaerobic conditions and inoculated with an increasing amount of inoculum originating from a mesophilic sludge digester. I/S tested values were 0 (no inoculum added), 0.015, 0.03, 0.06, 0.12, 0.25, 1, 2 and 4 (gVM(inoculum)/gVM(waste)). The results indicate that the apparent maximal rate of dissolved organic carbon accumulation is reached at I/S = 0.12. Under this level, the hydrolysis process is limited by the concentration of biomass and can thus be described as first order kinetics phenomena with respect to biomass for I/S ratios below 0.12. The maximum methane production rate and the minimal latency are reached at a ratio of 2. In addition to that, both methane signature and ARISA show a shift in the methanogenic populations from hydrogenotrophic to acetoclastic. (c) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:2258 / 2265
页数:8
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