Abstract
ABSTRACT The search for new alternatives in order to reuse residues is one way to minimize environmental impacts by promoting sustainable practices. This study analyzed the technical feasibility of briquettes production from urban pruning residue and sugarcane bagasse, turning them into a product with higher added value besides directing their use and reducing their improper disposal. Five treatments were studied from different ratios of the two residues: T1, T2, T3, T4 and T5, respectively made of 100% of urban pruning; 50% urban pruning and 50% sugarcane bagasse; 25% urban pruning and 75% sugarcane bagasse; 10% urban pruning and 90% sugarcane bagasse; 100% sugarcane bagasse. The materials were characterized physically, chemically and energetically. Briquettes were produced and evaluated for mechanical performance, with expansion tests, mechanical resistance and friability to verify the quality of the final product. The treatments 1 and 2 showed the best results, with lower friability and average values of mechanical resistance of 167.14 and 107.56 kgf, respectively. It is concluded that both residues (sugarcane bagasse and urban pruning) had potential for briquette production, as well as the mixture between both materials.
Highlights
Concerns about non-renewable energy sources such as oil and coal are remarkably large
This study analyzed the technical feasibility of briquettes production from urban pruning residue and sugarcane bagasse, turning them into a product with higher added value besides directing their use and reducing their improper disposal
Five treatments were studied from different ratios of the two residues: T1, T2, T3, T4 and T5, respectively made of 100% of urban pruning; 50% urban pruning and 50% sugarcane bagasse; 25% urban pruning and 75% sugarcane bagasse; 10% urban pruning and 90% sugarcane bagasse; 100% sugarcane bagasse
Summary
Concerns about non-renewable energy sources such as oil and coal are remarkably large. According to the Sugarcane Industry Union (UNICA, 2017), the State of São Paulo was responsible for 56.1% of the national sugarcane production during 2016/2017, corresponding a total volume of 366 million tons. When urban conditions are analyzed, urban residues raise attention for their amount, which continues to grow, and for their deficit of suitable environmental solutions for their proper disposal or reuse. According to the Urban Solid Residues State Report by the Environmental Agency of the State of São Paulo (CETESB, 2016), the production of residues was approximately 43000 t d-1 in São Paulo, with 860 tons being rejected as trash containing pruning residues from urban trees. According to Meira (2010), there are no references regarding the quantification of urban pruning wastes but the amount is very large and is often directed to landfills where they lose their utility
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