In the aim to find an original solution for the treatment of olive oil mill waste water, which constitutes a real danger for the environment, we set up a process based on clay and wood chips with mono or bi layer. The filtration results have been evaluated through the physic-chemical analysis of the filters and olive mill waste waters.
Methodology and results:The results showed that the quality of the filtration depends on the height and size of the filter.The effluent was considered acidic with an average pH of 5.32. Concentration of phenolic compounds was 5.454 g / l and 369 g COD / l. Percolation of the olive oil mill waste through the filters caused an increase in pH from 5.32 to 6.48 and a 98% removal of turbidity. This treatment also resulted in significant reductions in organic matter (42% of the total COD (Chemical Oxygen Demand) and 57.4% of phenolic compounds). The filtration rate is not constant because the clogging of filter pores.
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