Semi-continuous mono-digestion of OFMSW and Co-digestion of OFMSW with beech sawdust: Assessment of the maximum operational total solid content

JOURNAL OF ENVIRONMENTAL MANAGEMENT

卷:231

Article

Pastor-Poquet, Vicente^1,2,3  Papirio, Stefano⁴  Trably, Eric²  Rintala, Jukka³  Escudie, Renaud²  Esposito, Giovanni¹ 

[1] Univ Cassino & Southern Lazio, Dept Civil & Mech Engn, Via Biasio 43, I-03043 Cassino, FR, Italy

[2] Univ Montpellier, INRA, LBE, 102 Ave Etangs, F-11100 Narbonne, France

[3] Tampere Univ Technol, Dept Chem & Bioengn, Korkeakoulunkatu 10, FI-33720 Tampere, Finland

[4] Univ Napoli Federico II, Dept Civil Architectural & Environm Engn, Via Claudio 21, I-80125 Naples, Italy

关键词: High-solids anaerobic digestion;    Influent/effluent uncoupling;    Substrate overloading;    Acidification;    Ammonia inhibition;   

DOI  :  10.1016/j.jenvman.2018.10.002

来源: Elsevier

【 摘 要 】

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%).

【 授权许可】

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