Green Hydrogen-Compressed natural gas (bio-H-CNG) production from food waste: Organic load influence on hydrogen and methane fusion. (November 2021)

• Record Type: Journal Article
• Authors: Santhosh, J.; Sarkar, Omprakash; Venkata Mohan, S
• Is Part Of: Bioresource technology. Volume 340(2021)
• Publication Date: 2021-11
• Subjects: Green Hydrogen -- Acidogenic fermentation -- Volatile Fatty Acids (VFA) -- Chain Elongation -- Food Waste; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2021.125643
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Influence of FW organic load was evaluated on bio-H-CNG production. The composition of bio-H-CNG varied between 0.1 and 0.3 of H2 /(H2 + CH4 ). Time-based assessment of bioH2 + bioCH4 blend allowed the tuning of H-CNG composition. Food waste derived renewable bio-H-CNG can potentially replace fossil based H-CNG.requirment in transportation domain Abstract: Biogenic hydrogen (bioH2 ) enriched compressed natural gas (bio-H-CNG or biohythane) is emerging interest due to its feasibility to use in the existing transportation infrastructure with induced environmental benefits. This study evaluated the production of bioH2 and biomethane (bioCH4 ) towards bio-H-CNG formation at a varying organic load (OL: 30, 40, 50 g COD/L) of food waste (FW). Acidogenic reactor operated with FW at 40 g COD/L showed the highest cumulative bioH2 production while elevated OL (50 g COD/L) showed higher cumulative bioCH4 production (CMP : 11.92 L) from the methanogenic reactor. BioH2 and bioCH4 produced at different time intervals were combined to assess bio-H-CNG. The nature of biocatalyst and OL significantly regulated the composition of bio-H-CNG varying between 0.1 and 0.3 of H2 /(H2 +CH4 ) ratio accounting for 5–12.6 kJ/g COD. Chain elongation, converting short (C2-C4) to medium-chain fatty acids (Caproic acid, 1.16 g/L) was specifically observed during the acidogenic process.