Hydrocell separators use a single pump to drive four patented air (gas) eductors, instead of separate motor-driven impellers for each cell. This allows each eductor to saturate the entire volume of each separation cell with fine bubbles, ensuring efficient oil/water separation. The Hydrocell separator is used to process oil field-produced water, both onshore and offshore, or to process plant wastewater effluents prior to biological treatment or discharge into public waterways.