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Application of sugarcane bagasse and peanut shell in natura as bioadsorbents for vinasse treatment

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Abstract

Vinasse is one of the most polluting effluents in the sugar–alcohol industry due to its physicochemical properties. The common methods of treatment are not able to supply all the volume generated, and therefore, efforts are needed to obtain new technologies that are efficient in the management of this waste. So, this work aims to evaluate sugarcane bagasse and peanut shell, as renewable adsorbents, for the removal of organic matter, pH, and turbidity found in vinasse effluent. Commercial activated carbon was used to compare the data. Experimental assays were conducted using the adsorbents under three different concentrations (1:12.5 g L−1; 2:25.0 g L−1; 3:37.5 g L−1) at 3, 6, 12, 24, and 48 h of treatment, under controlled temperature (25 °C) and rotation (200 rpm). The bioadsorbents were able to promote significant removal of organic matters, showing natural adsorbent properties without any previous activation. Major COD removal (63.88%) was observed for the commercially activated carbon after 48 h of treatment and concentration of 37.5 g L−1. For the peanut shell and sugarcane bagasse, the major COD removal was 50.94% and 45.35%, respectively, after 48 h of treatment and concentration of 12.5 g L−1. The final effluent exhibited high residual COD content, indicating the necessity to use a second treatment in sequences, such as biodigestion or ozonolysis.

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The data used in this study can be provided by the corresponding author on reasonable request.

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Acknowledgements

This work was supported by the programs PIBIC and PIIC of Federal University of São João del Rei – Brazil (UFSJ) and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brazil (CAPES, Finance Code 001).

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This work was supported by the Federal University of São João del Rei/ UFSJ.

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FAL and ACSJ conducted the main experiments; FAL, BS, and RCZL wrote this manuscript; all authors contributed to the discussion of the manuscript results.

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Correspondence to Renata Carolina Zanetti Lofrano.

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de Aquino Lima, F., dos Santos Júnior, A.C., Sarrouh, B. et al. Application of sugarcane bagasse and peanut shell in natura as bioadsorbents for vinasse treatment. Clean Techn Environ Policy 26, 401–416 (2024). https://doi.org/10.1007/s10098-023-02636-7

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  • DOI: https://doi.org/10.1007/s10098-023-02636-7

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