Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Feasibility study of burning centrifuged sludge generated in a poultry slaughterhouse
Submission Author:
Thiago Calixto Teixeira , PR , Brazil
Co-Authors:
Thiago Calixto Teixeira, Eduardo Burin, Letícia Isabela Romoda Ripi
Presenter: Eduardo Burin
doi://10.26678/ABCM.COBEM2023.COB2023-0739
Abstract
The increase in food production due to global demand brings to the food production and processing industries the need for better disposal of waste generated in the process, as well as the need to improve overall production efficiency. In particular, poultry slaughterhouses generate industrial sludge, which contains energy potential that can be directed for reuse within the process. In this regard, the present work aims to analyze scenarios in which industrial sludge is burned in a biomass boiler using eucalyptus wood chips for steam production. Initially, an analysis was carried out to define the scenarios that would be studied. To ensure compliance with gas emission standards, a limit of 20% in mass or energy basis was considered for the co-combustion of sludge added to eucalyptus wood chips. This restriction aims to ensure safety in the burning process for steam generation. In total, three scenarios were analyzed: (scenario I) base case where there is no sludge burning in the boiler, and the waste is entirely destined for composting, with no reuse of this residue in the industry; (scenario II) where partial burning of the waste from the wastewater treatment plant is carried out, with a high moisture content (around 65%); and (scenario III) where the sludge undergoes a drying process before burning and composting. Analyzing the results, the burning of wet industrial sludge (scenario II) led to a reduction in sludge composting by 59% and, at the same time, a reduction in the amount of wood chips destined for burning by 15%. For the scenario where partial drying of the waste was considered, the average reduction in sludge destined for composting was 80% compared to the base case (scenario I), and there was also a reduction in the wood chips destined for burning by approximately 17%. The study shows that directing waste with energy potential for burning in industrial boilers that use eucalyptus wood chips as the main fuel is quite efficient, both in the waste disposal and in reducing biomass use. This represents a viable and sustainable alternative for managingwaste generated by the food industry, as well as contributing to cost reduction and increasing the energy efficiency of the production process.
Keywords
waste generated, poultry slaughterhouses, industrial boilers, burning centrifuged sludge
