What are CPI Separators and What is Their Contribution to Waste Water Treatment?

Corrugated plate interceptor separators (CPI Separators) are machinery that is mostly used in the treatment of effluent water to separate oil or suspended solids from the water. They are commonly used by oil refining companies and are a highly safe and efficient method of wastewater treatment.

In the treatment of oily water, plate packs are used in the CPI separators to improve the economy and size of the separation system.

Once separated the oil components collect in the corrugations while solids accumulate in the troughs.

Water and oil are naturally designed to separate. A CPI separator is a quality oil water separator system which is designed to separate the components quickly and efficiently. CPI separators are designed to recover the maximum amount of hydrocarbons from wastewater and cleanse the effluent for further treatment.

HowIt Works

Oily water enters the CPI at the top of the device and flows downwards between the plate separators. The separated oil sticks to the surface of the parallel plate separator, and moves upwards while the rest of the water moves downwards. When separating heavier oil particles the untreated water enters the plate separator at the bottom section of the device and moves through the plate separators in an upwards direction. The heavier particles slide down the plates and exit the device at the bottom.

The devices come in various sizes. The parallel plate separators are placed at an angle to allow the oil and or solids to be moved by gravity.


CPI’s are suitable for any oil water separator solution and will allow the effluent water to meet the requirements of pollution control. The compact space saving design and the efficiency of the devices have improved business processes and efficiencies in the oil industry, and allow for continuous operation of your business without any major downtime.


Comments are closed.