What are the design criteria for oil water separators?
An oil water separator is a primary treatment device. It is usually the first device, short of a sediment basin, to receive the waste water. Therefore, it can be exposed to a flow that will vary in rate and in oil concentration. In most applications the separator will be of the non-mechanical gravity type. Criteria for good design of oil water separators should include: effectiveness, proper inlet design, solids handling capability, enhanced separation, separate oil removal section, and clean water section. Effectiveness: The separator should be able to maintain its effectiveness at separating the liquids even when subjected to sudden variations in flow rate and oil concentration. It should be designed to handle the anticipated flow rate and contaminant concentrations under normal operation. It should also be capable of accepting flow rate increases up to 125% of rated capacity for a short duration without causing remixing of the oil/water interface. In addition, it should be capable o
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