Characteristics of Solid Fuel from Carbonized Surface Pellets Using Food Waste Digestion Sludge and Unused Forest Biomass: A Case Study in South Korea

The promulgation of the Biogas Act in South Korea has increased the number of organic waste treatment facilities and the amount of food waste digestion sludge (FWDS), a byproduct of the biogas process. FWDS recovery involves various challenges, which leads to the accumulation or improper disposal of...

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Bibliographic Details
Published in:Fermentation (Basel) 2024-12, Vol.10 (12), p.658
Main Authors: Ahn, Kwang-Ho, Lee, Ye-Eun, Jeong, Yoonah, Jung, Jinhong, Kim, I-Tae
Format: Article
Language:English
Subjects:
Anaerobic digestion
Biogas
Biomass
Biomass energy
By products
carbonization
Chloride
Composition
Composting
Coronaviruses
Emission standards
Environmental aspects
Feeds
Food waste
food waste digestion sludge
Food wastes
forest biomass
Forests
Hardwoods
Heavy metals
Moisture content
Organic wastes
Proteins
Raw materials
Refuse and refuse disposal
Resource recovery
Sludge
Waste treatment
Water content
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Summary:The promulgation of the Biogas Act in South Korea has increased the number of organic waste treatment facilities and the amount of food waste digestion sludge (FWDS), a byproduct of the biogas process. FWDS recovery involves various challenges, which leads to the accumulation or improper disposal of sludge. Hence, FWDS needs to be treated in environmentally sound and safe ways. In this study, anaerobic digestion sludges were mixed with unused forest biomass to produce fuel. The results showed that pellets produced via mixing of FWDS with unused forest biomass had improved durability, bulk density, and fine particle performance compared to surface-carbonized wood pellets. Carbonized pellets manufactured with 30% FWDS had a moisture content of 11.746% and met all biosolid waste fuel (SRF) standards, except for moisture content. Carbonized pellets prepared with 15% FWDS met the L2 wood pellet standards for ash content (less than 3.0%) and bulk density (greater than 550 kg/m3), as well as all other standard values in both the industrial wood pellet quality standards and bio-SRF criteria. This study confirmed the potential and suitability of digestion sludge and unused forest biomass for fuel utilization by addressing their respective limitations.
ISSN:2311-5637
2311-5637
DOI:10.3390/fermentation10120658