Journal
ENVIRONMENTAL TECHNOLOGY
Volume 37, Issue 10, Pages 1208-1219Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09593330.2015.1107624
Keywords
elderberry wastewater; Fenton treatment; biological treatment; legal requirements; economical assessment
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Funding
- Fundacao para a Ciencia e Tecnologia, Portugal [SFRH / BDE / 33977 / 2009]
- European Social Fund
- Human Potential Operational Programme
- Fundação para a Ciência e a Tecnologia [SFRH/BDE/33977/2009] Funding Source: FCT
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The utilization of Fenton's oxidation for the depuration of elderberry juice wastewater was studied. The aim was to select the adequate cost-effective operating conditions suitable to lead to an effluent within the legal thresholds to be discharged into the natural water courses. The treatment efficacy was assessed by chemical oxygen demand (COD), colour, phenolic content and total solids removal besides its ability to improve biodegradability (biochemical oxygen demand (BOD5)/COD). Moreover, the costs of the applied reactants were also considered. Fenton's reaction was able to abate at least 70% of COD (corresponding to a final value below 150 mg O-2 L-1). Besides, total phenolic content degradation was always achieved. Within these conditions, the resulting effluent is able to be directly discharged into the natural hydric channels. Fenton oxidation could be successfully applied as a single treatment method with a reactant cost of 4.38 euro m(-3) ([Fe2+] = 20 mmol L-1, [H2O2] = 100 mmol L-1, pH = 3 and 4 h of oxidation procedure).
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