Experimental investigation on self-sustained smouldering of food-processing sludge with extremely high moisture content: From laboratory-scale to pilot-scale volumetric scale-up.
Waste Manag
; 158: 13-22, 2023 Mar 01.
Article
em En
| MEDLINE
| ID: mdl-36623405
ABSTRACT
Although smouldering of solid waste with high moisture has shown strong promise in laboratory studies, there are fewer reports about the larger-scale device and continuous operation. This work studies a self-sustaining smouldering treatment of food-processing sludge (FPS) with extremely high moisture (over 85 %) in laboratory- and pilot-scale devices. Results from laboratory-scale experiments show that adding auxiliary fuel is necessary to maintain FPS self-sustaining smouldering, Sand FPS Sawdust = 2551 is a reasonable mixing ratio. Then, the self-sustaining smouldering is volumetrically scaled up to the pilot-scale. The smouldering asynchrony in the feedstock is observed due to the non-uniform air flux. Compared to the laboratory-scale, the pilot-scale device presents a similar temperature level but a higher smouldering velocity. Furthermore, a continuous process in the pilot-scale device is successfully performed, and the flue gas concentrations are measured 15.0 â¼ 16.5 % for O2, 4000 â¼ 5500 ppm for CO, 155 â¼ 195 ppm for NOx, 210 â¼ 250 ppm for VOCs, 55 â¼ 70 ppm for SO2, 0.0138 â¼ 0.0317 ngTEQ/m3 (at 11 % O2) for dioxin. These studied results can provide useful information for continuous, low-energy solid waste treatment.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Esgotos
/
Dibenzodioxinas Policloradas
Idioma:
En
Revista:
Waste Manag
Assunto da revista:
SAUDE AMBIENTAL
/
TOXICOLOGIA
Ano de publicação:
2023
Tipo de documento:
Article