Otro
Eletrólise de resíduos poluidores: I - Efluente de uma indústria liofilizadora de condimentos
Registro en:
Química Nova. Sociedade Brasileira de Química, v. 21, n. 1, p. 20-24, 1998.
0100-4042
10.1590/S0100-40421998000100004
S0100-40421998000100004
S0100-40421998000100004.pdf
Autor
Angelis, Dejanira Franceschi de
Corso, Carlos R.
Bidoia, Ederio Dino
Moraes, Peterson B.
Domingos, Roberto N.
Rocha-Filho, Romeu C.
Resumen
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. Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)