Question

in which of steps are floating layers of oil or grease removed from the water​

Answer 1

Explanation:

Free Oil or floating oil is removed by either skimming the surface in the skim tank or by gravity separation in the API separator. ... Removal requires chemical addition to lower the pH followed by addition of dissolved oxygen or nitrogen to remove the emulsified oils as they break free from the wastewater.

Answer 2

Answer:

The first step in removing oil is separating it from water. ... in grease/oil water interceptors, or separators. By using a ... oil layer and a layer of oil-free water ready for secondary processing .