The liquid wastes come from milling the olive fruits, which are called the Olive Mill Wastewater, are disposed directly without any treatment. This causes a pollution of soil, groundwater, lakes, rivers and seas; it makes negative consequences on the elements of the ecological systems besides. Therefore, the treatment of these wastes and the ability to reusing them are urgent and necessary. The areas planted with olive trees yearly increase in Syria, this means that the annual average of olive oil production increases too. This causes the increasing of the main wastes average that comes from milling the olive fruits (The Olive Mill Wastewater). This investigation has established the Possibility of Rremediation of Environmental Hazards in Olive Oil mill wastewater by using the aeration, which can degrade the total polyphenol compounds in Olive Oil mill wastewater, which have bad effects on aqua environment to 77,76 % during 15 days.