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Methane generation potential through anaerobic digestion of fruit waste

2020; Elsevier BV; Volume: 256; Linguagem: Inglês

10.1016/j.jclepro.2020.120389

1879-1786

Liliana Andréa dos Santos, Rebeca Beltrão Valença, Leandro César Santos da Silva, Sávio Henrique de Barros Holanda, Anderson Felipe Viana da Silva, José Fernando Thomé Jucá, André Felipe de Melo Sales Santos,

Hybrid Renewable Energy Systems

In fruit juice and pulp production, around 40–50% of waste generated is related to industrially processed fruit gross amount. Brazil is responsible for 57% of world market production, having the waste generation lost or being undervalued. Anaerobic digestion is an alternative for energetic valorization of this waste. The aim of this work is to evaluate methane generation potential of fruit waste (passion fruit peel, orange and cashew bagasse) and determine kinetic parameters for scale up. Biochemical methane potential (BMP) was evaluated in 250 mL batch reactors in mesophilic conditions for 60 days, using industrial and sewage anaerobic sludge as inocula. Kinetic parameters were determined from methane production curves, adjusting in first-order and modified Gompertz kinetic models. The best observed maximum generation potential (BMP) was 348 NmL.g−1 VS, in biogas, and 128 NmL.g−1 VS in methane, for orange bagasse with industrial sludge. Configuration methane accumulated volume presented better fit in modified Gompertz kinetic model. Fruit waste anaerobic digestion is a promising alternative for valorization and utilization of its energy potential, providing gains to productive chain.