The darkening process of black ripe olives produces a high volume of wastewater that is phytotoxic due to its high sodium content. The substitution of NaOH by KOH to produce ripe olives was investigated at pilot plant scale with olives of the Hojiblanca, Manzanilla and Cacereña cultivars. No significant differences were observed in this step due to the type of alkali used, although a higher weight increase was found when using KOH instead of NaOH. Furthermore, the final canned product had a similar superficial color, firmness, content of bioactive substances and flavor regardless of the alkali used; the difference with the traditional product was a slightly lower content in Na and six times more K content. Moreover, the concentration of potassium ranged from 6200 to 7500 mg/L in the overall wastewater discharged during the oxidation process with KOH, therefore these solutions could be used as biofertilizer for agriculture purposes.

黑色成熟橄榄的变黑过程会产生大量废水，这些废水由于钠含量高而具有植物毒性。在中试工厂规模下，研究了使用霍奇布兰卡，曼萨尼亚和卡塞雷尼亚品种的橄榄，用KOH代替NaOH生产成熟的橄榄。尽管使用的碱类型不同，但在此步骤中未观察到明显差异，尽管使用KOH代替NaOH时发现重量增加了更多。此外，无论使用何种碱，最终罐头产品的表面颜色，硬度，生物活性物质含量和风味都相似。与传统产品的区别在于Na含量略低，而K含量则高6倍。此外，