Edafología. Volumen 7-2. Mayo 2000. pag 91-102.
A lysimetric assay using two different soils was performed in order to assess the impact on percolating waters derived from olive oil mill wastewater (OOMW) amending of soils. OOMW was applied at different rates, equivalent to 0 (control), 30, 180 and 360 m3ha-1. Each application was followed by mixing (upper 20 cm) and rain simulation (168 mm). This cycle was done monthly in all lysimeters, in order to complete 8 cycles. All the leachates were collected monthly and analysed for several parameters: pH, electrical conductivity, COD, phenolic compounds, NO-3, Na+, K+ and seed germination. The results show that the application of OOMW at rates of 30 m3 ha-1 does not lead to important changes related to control soils, but rates of 180 or 360 may cause water contamination, mainly due to salinity, COD, and phenolic compounds, which increase in leachates. This effects enhance with higher rates and number of applications.
Key words: olive oil mill wastewater, water pollution, soil amendment, phenol.