The aim of this work was to evaluate the feasibility of treating food waste generated from a hawker centre in a pilot-scale anaerobic digester operating on site in an urban area of Singapore. For this purpose, a 10.4 m digester was housed within two 20 feet containerized systems and sited adjacent to the hawker centre. The system reported in this work was during the startup phase, for over 71 days of real and varying food wastes loading rate. The results demonstrated that the decentralized system had an average specific methane yield of 0.55 ± 0.04 m/kg, with methane concentrations of 56.6 ± 2.3%. For the power generation output, the energy assessment revealed an average of 2.05 ± 0.57 m/kW h consumption rate. Accordingly, on the last day of startup phase, the inoculum of the digester was richer in organisms from the phylum Thermoplasmatota, i.e., genera Candidatus_Methanogranum and Candidatus_Methanoplasma, alongside with other dominant abundance from phyla Bacteroidota, Firmicutes, Synergistota, and Verrucomicrobiota. This study provides new insights into pilot scale decentralized anaerobic digestion with varying food waste relate to the characterizations of digester microbial communities, as well as turning in a typical integrated anaerobic digestion of food waste-to-energy system a reality.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.chemosphere.2023.137937 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Advances and insights into modeling extracellular electron transfer in anaerobic bioprocesses.
Sci Total Environ
January 2025
Department of Environmental Health and Engineering, Johns Hopkins University, 3400 N Charles St, Baltimore, MD 21218, United States. Electronic address:
Extracellular electron transfer (EET) plays an important role in maintaining redox balance in both natural and engineered anaerobic microbial systems, driving key biochemical processes such as energy generation, bioremediation, and waste degradation. While EET has been characterized in a limited number of microbes and applied in anaerobic digestion and bioelectrochemical systems, further research is needed to explore its mechanism across a broader range of microbial species and anaerobic processes. This review highlights advanced modeling frameworks that provide deeper insights into EET mechanisms and dynamics, aiming to optimize research efforts and minimize time and resource expenditure.
View Article and Find Full Text PDFMethane production from anaerobic pre-treatment of municipal wastewater combined with olive mill wastewater: A demonstration study.
Water Sci Technol
January 2025
The Institute of Applied Research, The Galilee Society, Shefa-Amr 2020000, Israel; Agrobics Ltd, Shefa-Amr 2020000, Israel; Prof. Ephraim Katzir Department of Biotechnology Engineering, Braude College of Engineering, Karmiel 2161002, Israel.
The advanced anaerobic technology (AAT), developed based on an immobilized high-rate anaerobic reactor, was applied as a pretreatment of municipal wastewater (WW) at Karmiel's treatment plant in Israel. The demonstration-scale AAT (21 m) system was operated at a flow rate of 100 mday municipal WW mixed with olive mill wastewater (OMW) (0.5 mday) to simulate the scenario of illegal discharge of agro-industrial WW.
View Article and Find Full Text PDFAnthraquinone-2-sulfonate immobilized on granular activated carbon inhibits methane production during the anaerobic digestion of swine wastewater.
Water Sci Technol
January 2025
Departamento de Biotecnología y Ciencias Alimentarias, Instituto Tecnológico de Sonora (ITSON), 5 de Febrero 818 sur, Ciudad Obregón, Sonora 85000, México E-mail:
Granular activated carbon (GAC) and GAC modified with anthraquinone-2-sulfonate (AQS) were used as conductive materials during the anaerobic digestion of swine wastewater (SW). The electron transfer capacity (ETC) in the GAC-AQS was 2.1-fold higher than the unmodified GAC.
View Article and Find Full Text PDFPromoting caproate production using anaerobically digested sludge-derived biochar: Performances, mechanisms, and environmental impacts.
Bioresour Technol
January 2025
School of Environment, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China. Electronic address:
Carbon chain elongation offers a promising pathway for converting waste resources into caproate. However, challenges in yield and selectivity have limited its broader application. To address these limitations, anaerobically digested sludge-derived biochar (ADS-B) was incorporated into the carbon chain elongation process.
View Article and Find Full Text PDFMesophilic anaerobic digestion of mixed sludge in CSTR and AnMBR systems: A perspective on microplastics fate.
J Environ Manage
January 2025
CALAGUA - Unitat Mixta UV-UPV, Departament d'Enginyeria Química, Universitat de València, Avinguda de la Universitat s/n, Burjassot, Valencia, 46100, Spain.
Most microplastics (MPs) end up in the biosolids produced in wastewater treatment plants (WWTPs) and can pose contamination risks when the biosolids are applied to agriculture. This study evaluated the impact of mesophilic anaerobic digestion on the fate of MPs in WWTP sludge. For this, two laboratory-scale anaerobic digesters were operated in parallel, consisting of a continuous stirred tank reactor (CSTR) and a membrane bioreactor (AnMBR) equipped with an ultrafiltration membrane to decouple the hydraulic and sludge retention times.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!