Journal
BIORESOURCE TECHNOLOGY
Volume 357, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2022.127360
Keywords
Anaerobic co-digestion; Methane; Biogas; Balanced nutrition; Synergistic effect
Funding
- China Postdoctoral Science Foun-dation [2020M681510]
- Scientific Research and Technology Development Program of Guangxi [1644901]
- National Nat-ural Science Foundation of China [31972042]
- Foreign Ex-perts Program of the Ministry of Science and Technology of China [QNJ20200214015]
- Innovation & Entrepreneurship Program of Jiangsu Province of China [JSSCBS20210929]
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This study establishes a strategy of balancing sugar-fiber-nitrogen nutrients for improved methane production by co-digesting banana pseudostem, sugarcane baggage, and chicken manure. The co-digestion process remains stable and provides a deeper understanding of nutrient balance.
Balanced nutrition is important for maximizing anaerobic digestion (AD) performance. Herein, the strategy of balancing sugar-fiber-nitrogen nutrients was first established for improved methane production by co-digesting two agricultural and one livestock wastes with complementary compositional properties, such as banana pseudostem (BPS), sugarcane baggage (SCB), and chicken manure (CM) having high sugar, fiber and nitrogen contents, respectively. The maximum methane yield was 186.5 mL/g VSadded with a mixture of 45.7% BPS, 26.2% SCB and 28.1% CM (with 1: 11.3: 0.3 of sugar to fiber to nitrogen ratio), increasing by 16.1%, 53.3%, 122.6% than those of mono- BPS, SCB, and CM, respectively. The co-digestion process remained stable under an organic load of 4 g VS/(L.day), which was attributed to the predominant presence of Bacteroidetes, Proteobacteria, Thauera, uncultured_bacterium_p_Aegiribacteria, and hydrogenotrophic methanogens. This study provides a deeper understanding of the co-digestion with agricultural and livestock wastes from the perspective of nutrient balance.
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