Anaerobic co-digestion of marine macroalgae waste and fruit waste: Effect of mixture ratio on biogas production

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Pardilho, S (Author) FEUP; Rui Boaventura (Author) FEUP; Manuel Fonseca Almeida (Author) FEUP; Joana Dias (Author) FEUP

Journal

Title: Journal of Environmental Management

Vol. 322

ISSN: 0301-4797

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

Scopus

Other information

Authenticus ID: P-00X-4XZ

DOI: 10.1016/j.jenvman.2022.116142

Abstract (EN): Marine macroalgae waste (MMW) was used at different mixing ratios with fruit waste (FW) to evaluate the potential of co-digestion in enhancing methane yield. The process was conducted at mesophilic conditions (37 C) with a fixed amount of biomass (10 g, 3.5% TS) and inoculum (150 mL; digested sewage sludge) and using MMW:FW ratios from 40:60 to 70:30. The results showed inhibition of the process for most of the studied substrate ratios, and in the mono-digestion of both substrates, possibly due to the accumulation of volatile fatty acids. A maximum biogas yield of 295 mL/g VS with 72% of methane was however obtained for the 60MMW:40FW ratio, corresponding to an estimated maximum methane yield of 213 mL/g VS and around 46% of the theoretical maximum methane production (49% of organic matter removal). The results show that the co -digestion of MMW with FW enhances the methane yield of both independent substrates.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7