Oil Interceptors and Grease Interceptors

Users and Manufacturers

Emulsions and heavy metals in the interceptor - what needs to be done?

Production and operation of oil separators in accordance with EN 858 and grease separators in accordance with EN 1825 are regulated normatively. There is also a normative procedure for dimensioning and testing these systems. Nevertheless, EN 858 takes into account individual cases where the required limits cannot be met by the separator systems. EN 858 requires a downstream emulsion breaking system (EBS) in these cases.

If oil interceptors or grease interceptors are not sufficient, OKO-aquaclean® flotation plants by OKO-tech provide an inexpensive and pioneering technology for an emulsion breaking process that is largely chemical-free.

Unstable emulsions of oils and greases in the wastewater are separated and discharged purely physically by the OKO-aquaclean flotation plants. For treating stable oily or greasy emulsions, caused by emulsifying cleaning agents (surfactants), for example, we offer OKO-aquaclean flotation plants configured as emulsion breaking system. Modern demulsifiers break the emulsions efficiently; oils or greases are separated and collected.

Another application is heavy metal precipitation. It is necessary when there are heavy metals in the oil separator. Due to the use of acidic cleaning agents, heavy metals such as zinc are dissolved out from from galvanized grids or covers of waste water gutters, for example. They get into the waste water and pass through the oil separator unhindered. In this case, OKO-aquaclean emulsion breaking systems carry out heavy metal precipitation, as is required. Precipitation and separation of the heavy metals are carried out in one compact unit, thus ensuring compliance with the limits for the water flowing out. Typical applications include zinc and copper in the oil-water separator, but other heavy metals such as nickel, chromium, and lead can get into the wastewater as well, due to various washing processes and materials.

The module "emulsion breaking system" includes, e.g., dosing pumps, pH-measuring/control und a sophisticated control unit that carries out and monitors the process of emulsion breaking fully automated. Modern, highly efficient demulsifiers and flocculants ensure efficient emulsion breaking and reliable removal of heavy metals.

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Case study Oil-/Grease Interceptors

Here you can download our case study for users of oil and grease interceptors.