In this study, mono-digestion of the organic fraction of municipal solid waste (OFMSW) and co-digestion of OFMSW with beech sawdust, simulating green waste, were used to investigate the maximum operational total solid (TS) content in semi-continuous high-solids anaerobic digestion (HS-AD). To alleviate substrate overloading in HS-AD, the effluent mass was relatively reduced compared to the influent mass, extending the mass retention time. To this aim, the reactor mass was daily evaluated, permitting to assess the reactor content removal by biogas production. During mono-digestion of OFMSW, the NH₃ inhibition and the rapid TS removal prevented to maintain HS-AD conditions (i.e. TS ≥ 10%), without exacerbating the risk of reactor acidification. In contrast, the inclusion of sawdust in OFMSW permitted to operate HS-AD up to 30% TS, before acidification occurred. Therefore, including a lignocellulosic substrate in OFMSW can prevent acidification and stabilize HS-AD at very high TS contents (i.e. 20–30%).

在这项研究中，通过模拟城市垃圾的有机部分（OFMSW）的单消化和与山毛榉木屑一起的OFMSW的消化（模拟绿色垃圾）来研究半连续高-固体厌氧消化（HS-AD）。为了减轻HS-AD中的底物超载，与进水质量相比，出水质量相对减少，延长了质量保留时间。为了这个目的，每天评估反应器质量，从而允许评估通过沼气生产去除反应器的内容物。在OFMSW的单消化过程中，NH ₃抑制和快速去除TS阻止了维持HS-AD条件（即TS≥10％），而不会加剧反应器酸化的风险。相反，在酸化发生之前，在OFMSW中包含锯末允许在高达30％TS的条件下运行HS-AD。因此，在OFMSW中包含木质纤维素底物可以防止酸化并使HS-AD稳定在非常高的TS含量（即20％至30％）下。