The relationship between oil and water in a mixture is well-known and governed by two physical properties:
- Specific Gravity: Most hydrocarbons have a lower specific gravity than water. Without agitation, oil separates from the water and floats to the surface. These oils are known as LNAPL’s, Light Non-Aqueous Phase Liquid. Oils (and other components) that sink in water have a higher specific gravity and are known as DNAPL’s, Dense Non-Aqueous Phase Liquid.
- Surface Tension and Affinity: Normally, oil bonds more tightly to itself and other materials than to water. This affinity, and differences in surface tension between oil and water, cause oils to adhere to a skimming medium.
Although designs vary, all oil skimmers rely on specific gravity, surface tension and a moving medium to remove floating oil from a fluid’s surface.
Find out more about the 9 typical applications for Industrial oil skimmers by clicking the button below.
A customer in South Korea recently contacted Abanaki in search of a wastewater skimmer. The company is a steel mill that makes hot and cold rolled steel, as well as other types. The problem the facility was facing was that lubrication grease and oil from the production line was ending up in the wastewater pit. The water cannot be discharged until the grease and oil levels are reduced to environmentally safe levels. After further assessment of the company’s manufacturing process, Abanaki suggested it use a Grease Grabber
® Belt Oil Skimmer to solve the problem. This skimmer is capable of handling thick greases and oils due to its belt drive assembly that physically pulls the belt through the wiper blades. The heated discharge hopper thins down the grease to make for easier discharge of the recovered product. By adding the Grease Grabber as a wastewater skimmer to its process, the company was able to remove the floating greases and oils from the wastewater pit, the pollution levels were reduced and met environmental standards.
belt oil skimmer