Seaweed valorization as anaerobic co-substrate with fat, oil, and grease: Biomethane potential and microbial dynamics

IF 9.7 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING

Bioresource Technology Pub Date : 2025-02-05 DOI:10.1016/j.biortech.2025.132155

Shah Faisal , Adel W. Almutairi , Irfan Saif , Li Ting , Qingyuan Wang , Ahmad Mustafa , Reham Ebaid

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Abstract

The present study explored the anaerobic co-digestion (AcD) of seaweed Gracilaria vermiculophylla with fat, oil, and grease (FOG) at 75, 50, and 25 % w/w of volatile solids (VS). Mono-digestion of FOG and SW led to a methane production of 133 and 109 mL/(g.d) with 40 days lag-phase, lower than 235 mL/(g.d) of AcD at FOG-50:SW-50 with reduced lag-phase of 20 days. The palmitic and oleic acid reduction was 95 % in the reactors FOG-50:SW-50, followed by FOG-25:SW-75, which was 84 %, as compared to FOG mono-digestion (47 %). Relative abundance of Firmicutes, Chloroflexi, and Bacteroidetes were enriched during AcD. The relative abundance of Methanosaeta was enhanced (40–90 %) in FOG-50:SW-50 compared with FOG-100:SW-0 as the reduction in Methanosaeta was replaced by Methanoculleus (30 %) and RuMen-M2 (10 %). The present study offers essential perspectives for the AcD of FOG with SW, showcasing the benefits of SW as a co-substrate for improved methane recovery from FOG.

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.