Integrated ozonation and biomethanization treatments of vinasse derived from ethanol manufacturing

• Published in: Journal of hazardous materials Vol. 188; no. 1; pp. 247 - 253
• Main Authors: Siles, J.A., García-García, I., Martín, A., Martín, M.A.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 15-04-2011; Elsevier
• Subjects: anaerobic digestion; Applied sciences; biodegradability; Biodegradation, Environmental; bioethanol; Biological and medical sciences; Biotechnology; Carbon; Chemical engineering; chemical oxygen demand; Crack opening displacement; Environmental Restoration and Remediation - methods; Ethanol; Ethanol - chemical synthesis; Ethyl alcohol; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; General purification processes; General treatment and storage processes; Industrial Waste - prevention & control; manufacturing; Mesophilic biomethanization; Methane; methane production; Methods. Procedures. Technologies; Others; Ozonation; Ozone - chemistry; Phenols; Pollution; pretreatment; Reactors; Reduction; temperature; Various methods and equipments; Vinasse; Waste water; Wastes; wastewater; Wastewaters; Water Pollutants, Chemical - metabolism; Water treatment and pollution; Ozonation; Phenols; Mesophilic biomethanization; Ethanol; Vinasse; Methane; Purification; Biodegradability; Waste treatment; Laboratory scale; Anaerobic digestion; Waste water; Ozonization; Batchwise; Anaerobe; Chemical oxygen demand; Mesophily; Production; Water quality; Total organic carbon; Manufacturing; Biological treatment; Reactor
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2011.01.096

Anaerobic digestion of vinasse derived from bioethanol manufacturing, in which total COD was found to be 68.56
±
8.17
g/L, was studied in batch laboratory-scale reactors at mesophilic temperature (35
°C). The vinasse was subjected to a short ozonation pre-treatment (15
min) in which more than 50% reduction of phenols was observed, although the total organic carbon concentration remained approximately stable, indicating that the phenols were transformed into other simpler forms. The anaerobic biodegradability of raw and pre-treated vinasse was similar, reaching values close to 80% (COD). However, the methane yield coefficient and methane production rate enhanced by around 13.6% and 41.16%, respectively, when the ozonized vinasse was fed. These results indicate that the integration of chemical–biological treatments could be a viable option for the purification of this hazardous wastewater.