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Ozonation of black‐table‐olive industrial wastewaters: effect of an aerobic biological pretreatment
Author(s) -
BeltranHeredia Jesus,
Torregrosa Joaquin,
Dominguez Joaquin R,
Garcia Juan
Publication year - 2000
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/1097-4660(200007)75:7<561::aid-jctb254>3.0.co;2-b
Subject(s) - chemistry , reaction rate constant , kinetic energy , ozone , yield (engineering) , arrhenius equation , degradation (telecommunications) , aromaticity , organic chemistry , environmental chemistry , kinetics , thermodynamics , activation energy , molecule , telecommunications , physics , quantum mechanics , computer science
The present work is a study of oxidative degradation of the organic matter present in the washing waters from the black‐table‐olive industry. This oxidation is performed by an ozonation process, by an aerobic biological degradation process, and by another ozonation of biologically pretreated washing waters. In the ozonation process, a second‐order kinetic reaction with respect to ozone and COD or aromaticity has been deduced. The kinetic rate constants were correlated as a function of temperature by Arrhenius‐type equations. In the aerobic biological treatment, a kinetic study was performed using the Contois model, giving a value of 4.8 10 −2 h −1 for the kinetic bioreaction constant. Likewise, a cell yield coefficient of 0.30 g VSS g COD −1 and a kinetic constant for the endogenous metabolisme of 1.2 10 −2 h −1 were deduced. Finally, in the ozonation of biologically pretreated wash‐waters, the deduced kinetic rate constants for COD and aromaticity were, respectively, 4.5 and 2.4 times higher that those corresponding to the ozonation of wash‐waters without biological pretreatment. © 2000 Society of Chemical Industry