Grasas y Aceites, Vol 42, No 4 (1991)

Biodegradation of phenolic compounds present in oil-mill wastewater


https://doi.org/10.3989/gya.1991.v42.i4.1232

R. Maestro Durán
Instituto de la Grasa y sus Derivados (CSIC), Spain

R. Borja Padilla
Instituto de la Grasa y sus Derivados (CSIC), Spain

A. Martín Martín
Departamento de Ingeniería Química. Facultad de Ciencias. Universidad de Córdoba, Spain

J. A. Fiestas de Ursinos
Instituto de la Grasa y sus Derivados (CSIC), Spain

J. Alba Mendoza
Instituto de la Grasa y sus Derivados (CSIC), Spain

Abstract


Oil-mill wastewater is the main responsible of the pollution in Andalusian due to high content of organic substances. Its depuration by methanization is difficult because of the antimicrobial activity of phenolic derivatives. These compounds can be drastically reduced by a previous aerobic treatment of the oil mill wastewater with specific microorganisms. After this pretreatment, anaerobic depuration takes place without inhibition, the velocity of the reaction being 5 times higher than before the pretreatment.
In this paper a qualitative study of the phenols present in oil-mill wastewater by thin layer chromatography has been done.
Beside that, quantitative determination of total phenols, ortoand meta-diphenols as well as Chemical Oxigen Demand (COD) before the treatment, after the pretreatment and after biomethanization have been carried out.
Finally, leucoanthocyanins that could originate polymerized phenols have not been found.

Keywords


Aerobic pretreatment; Anaerobic depuration; Oil-mill wastewater; Phenolic compounds

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