After rereading the initial data, the two recommendations for equalization and pH reduction are spot on. At pH of 11, you most certainly have stable emulsions. Lowering the pH will break out the oil. Be very careful not to drop the pH too low, or the potential for H2S evolution becomes much higher!
Published by Sean Roop, Industrial and Engineering Consultants, LLC - Senior Water and Process Consultant
After rereading the initial data, the two recommendations for equalization and pH reduction are spot on. At pH of 11, you most certainly have stable emulsions. Lowering the pH will break out the oil. Be very careful not to drop the pH too low, or the potential for H2S evolution becomes much higher!