Evaluation of the effect of different treatment methods on sugarcane vinasse remediation

Sugarcane vinasse is a by-product obtained during ethanol production in sugar-ethanol plants. For each 1 L of ethanol produced approximately 11 L of vinasse are generated. As this residue is obtained in high amounts, it is used as fertilizer in sugarcane crops. However, despite being rich in nutrien...

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Bibliographic Details
Published in:Journal of environmental science and health. Part B, Pesticides, food contaminants, and agricultural wastes Pesticides, food contaminants, and agricultural wastes, 2019-09, Vol.54 (9), p.791-800
Main Authors: Castro, Luiz Eduardo Nochi, Santos, João Victor Furlan, Fagnani, Kátia Cristina, Alves, Helton José, Colpini, Leda Maria Saragiotto
Format: Article
Language:English
Subjects:
Absorption spectra
adsorption
Ashes
Calorific value
Catalysts
Coagulation
coagulation/flocculation
Conductivity
Environmental Pollution
Ethanol
Fertilizers
Fertilizers - analysis
Flocculation
heterogeneous photocatalysis
Household wastes
Nutrients
pH effects
Refuse Disposal - methods
Saccharum - chemistry
Saccharum - growth & development
Sewage
Sludge
Sugarcane
Turbidity
Vinasse
Waste Products - analysis
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Summary:Sugarcane vinasse is a by-product obtained during ethanol production in sugar-ethanol plants. For each 1 L of ethanol produced approximately 11 L of vinasse are generated. As this residue is obtained in high amounts, it is used as fertilizer in sugarcane crops. However, despite being rich in nutrients, sugarcane vinasse is approximately one hundred times more polluting than domestic sewage, making it an environmental problem. Thus, the aim of the present study was to propose a treatment sequence for sugarcane vinasse and evaluate the possibility of energetic use of the generated sludge in the coagulation/flocculation stage. pH, conductivity, turbidity and decreases in UV/Vis absorption spectra were determined for each treatment step. In addition, the upper calorific value of the generated sludge was also determined, while ash (adsorption treatment) and catalyst (heterogeneous photocatalysis) characterizations were also carried out. At the end of the treatment, initial vinasse turbidity was reduced by 100% and pH and conductivity values were stabilized. The sludge presented a higher calorific value of approximately 3,000 kcal kg −1 and the ash and catalyst displayed favorable characteristics to be applied to the sugarcane vinasse treatment stages.
ISSN:0360-1234
1532-4109
DOI:10.1080/03601234.2019.1669981