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Management scenarios for olive oil mill waste based on characterization and leaching tests

Xekoukoulotakis Nikos, Mantzavinos Dionysis, Javier R. Viguri, Ana Andrés, Mercedes Villegas, Alberto Coz

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Περίληψη

BACKGROUND: Olive oil mill waste is a serious environmental problem in the Mediterranean basin given its particular characteristics of high organic content, seasonal and localized generation, and the type of processing involved.RESULTS: Olive mill waste from a three-phase mill was characterized by means of total analysis, availability and mobility of the pollutants in order to help the decision-maker about possible options for its valorization and/or disposal. Water content, loss of ignition, total organic carbon, phenol index and metals concentrations were measured to fully characterize the waste. Three leaching tests (NEN 7341, EN 12457 and UNE CEN-TS 15364 EX) were carried out to evaluate the environmental hazard of the waste material and the leachates were characterized with respect to electric conductivity, pH, heavy metals, anions and organic pollutants (phenol index and total organic carbon) according to European waste directives. The results were compared with EU regulations for inert, non-hazardous and hazardous waste disposal.CONCLUSION: It was found that not only organic parameters must be taken into account concerning the fate of this waste material, but also the mobility of heavy metals and anions should be studied. Furthermore, stabilization/solidification processes are recommended before landfill disposal of this kind of agro-waste material. Copyright © 2011 Society of Chemical Industry.

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