Treatment of Winery Wastewater with a Combination of Adsorption and Thermocatalytic Processes

The release of winery wastewater (WW) into the environment, without proper treatment, can cause severe problems to freshwater quality and natural fauna and flora. Therefore, in this work a treatment process was studied, combining adsorption and thermocatalytic oxidation processes. In a more specific...

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Bibliographic Details
Published in:Processes 2022-01, Vol.10 (1), p.75
Main Authors: Jorge, Nuno, Teixeira, Ana R., Guimarães, Vanessa, Lucas, Marco S., Peres, José A.
Format: Article
Language:English
Subjects:
Adsorption
Agitation
Bentonite
Carbon
Chemical oxygen demand
Clay
Flavonoids
Germination
Hydrogen peroxide
Organic carbon
Oxidants
Oxidation
Oxidizing agents
Performance evaluation
pH effects
Phytotoxicity
Polyphenols
Potassium
Potassium persulfate
Seeds
Sodium
Spectrum analysis
Total organic carbon
Wastewater treatment
Wineries
Wineries & vineyards
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Summary:The release of winery wastewater (WW) into the environment, without proper treatment, can cause severe problems to freshwater quality and natural fauna and flora. Therefore, in this work a treatment process was studied, combining adsorption and thermocatalytic oxidation processes. In a more specific way, it optimized the combination of activated sodium bentonite (Na-Mt) and potassium persulfate (KPS)/sodium percarbonate (SPC) as oxidant agents. With the combination of best operational conditions of adsorption ([Na-Mt] = 5.0 g/L, pH = 3.0, V = 500 mL, agitation 350 rpm, T = 298 K, t = 24 h) and thermocatalytic oxidation processes (S2O82−/H2O2 ratio = 1:0.25, S2O82−/H2O2 dosage = 0.1:0.025 (g/g), pH = 7.0, T = 343 K, agitation 350 rpm, t = 2 h), a total organic carbon, chemical oxygen demand and total polyphenols removal of 76.7, 81.4 and >99% was achieved, respectively. Finally, it was evaluated the effect of the treatment processes in the germination index (GI) of different plant seeds. A GI > 80% was achieved, showing a low phytotoxicity effect of the processes applied in the winery wastewater treatment.
ISSN:2227-9717
2227-9717
DOI:10.3390/pr10010075