Biogas Production from Coffee Pulp and Chicken Feathers Using Liquid- and Solid-State Anaerobic Digestions

Abstract

Agricultural waste, particularly lignocellulose, has been used in the second generation of biogas. Coffee pulp and chicken feathers can be developed as biogas raw materials because of their suitability as a biogas substrate. This study investigates the effect of the percentage of total solids (TS), carbon to nitrogen ratio (C/N, g/g), and delignification pretreatment on biogas production from coffee pulp and chicken feathers, and aims to compose kinetics using the modified Gompertz model. The results show that adjusting the percentage of TS at low-level speeds up the degradation process, which increases chemical oxygen demand (COD) reduction and biogas production. COD reduction and biogas production increase optimally at the 25 (g/g) C/N ratio. Pretreatment delignification aids microorganisms in substrate decomposition, resulting in faster COD reduction and biogas conversion. The 25% TS and 25 (g/g) C/N ratio with the delignification process achieved the best biogas production, with biogas production of 10,438.04 mL. The Gompertz method shows that the difference in TS percentage can influence biogas production. Moreover, the method shows that biogas production is higher with the delignification process than without it.

Evaluation of Energy Potential from Coffee Pulp in a Hydrothermal Power Market through System Dynamics: The Case of Colombia

“…The technical features of biomass, such as cellulose, lignin, TS, and volatile solid (VS) content were studied by Rojas-Sossa et al [57] to evaluate the effect of these properties on the amount of biogas generated from different combinations of mucilage and pulp, and by Widjaja et al [58] and Corro et al [59] to assess biogas production using the co-digestion of coffee pulp and cow dung. These works are similar to the study by Sumardiono et al [60], where the TS content of coffee pulp for biogas generation was discussed, concluding that the TS content can affect the amount of biogas generated.…”

TYPES OF MANUFACTURING OF BIOGAS - With design thinking approach

“…The Gompertz technique indicates that it is better to distinguish the TS percentage that can affect biogas production and that biogas production by classification method is better than not using it. (26) The complexity of microbial societies and metabolic pathways involved in biogas production are poorly understood. Metagenome sequence statistics of biogas generating microbial networks can give an idea of a rational approach to improve biotechnological biogas generation systems.…”

Biogas Production by Anaerobic Digestion of Coffee Husks and Cattle Manure

“…The absence of methane in the gas produced in the first weeks of the period of anaerobic digestion may be related to the fact that methanogenic bacteria are still inefficient due to the existence of oxygen available in the medium, favoring the action of aerobic and facultative bacteria. It can be attributed to the lag phase, in which bacteria adapt to a new environment (Dahunsi, 2019, Paranhos et al, 2020Sumardiono et al, 2021). 2021) reported initial gas production when assessing the ACoD of fish farming sludge (FFS) and cattle manure (CM).…”