Eletrólise de resíduos poluidores: I - Efluente de uma indústria liofilizadora de condimentos
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Graduate program
Undergraduate course
Journal Title
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Volume Title
Publisher
Sociedade Brasileira de Química
Type
Article
Access right
Acesso aberto
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Abstract
Wastewater from a seasoning freeze-drying industry was electrolysed to increase its biodegradability. Stainless-steel electrodes were used at 9.09 A/m², for up to 80 min. Conductivity, pH, biochemical (BOD) and chemical (COD) oxygen demands, Daphnia similis acute toxicity bioassays, and bacteria counting through the plate count agar method were determined after different times of electrolysis. The results (e.g. higher BOD and lower COD) showed that the biodegradability of the wastewater was significantly increased; furthermore, Fe2+ ions liberated by the electrodes cause microorganisms to die and, when oxidised to Fe3+, contribute for the flocculation and sedimentation of solid residues.
Description
Keywords
electrolysis, seasoning wastewater, wastewater treatment
Language
Portuguese
Citation
Química Nova. Sociedade Brasileira de Química, v. 21, n. 1, p. 20-24, 1998.
