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Used Oil Recycling with VMAT (Vibratory Membrane Advanced Treatment)

Dunwell Enviro-Tech (Holdings) Ltd
Yuen Long Industrial Estate
Early 2004
End of 2004
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Disposal of used lubricant has always been a big challenge for every city. Untreated or improperly treated used lubricant oil will pose serious pollution to soil, underground water and river water.

Recycling of used oil is one of the solutions to this problem, however, the technology do have some limitations and drawbacks, such as high complexity of technology, investment cost, operating cost, energy consumption, low cost effectiveness and secondary pollution.

VMAT is a breakthrough in the used lubricant recycling technology. It is the first commercialised, vibrating membrane system for used lubricant recycling. Making use of special process design, self designed, tailor-made membrane structure, along with the vibrating mechanism, VMAT have successfully solved the inherent fouling problem of membrane recycling technology, allows the handling of synthetic, mineral based lubricant or even commingled of the two types, which was not possible with the traditional distillation process. With intense shear waves at the membrane surface to repel foulants, VMAT does not require high pressure differential across membranes. Moreover, the process temperature ranges between 80°C to 90°C, approximately 3 times lower than the traditional distillation system, meaning an energy saving of up to 90% and a cracking free process with no air pollution and unpleasant smell in recycled oil. Low temperature and pressure also means a better energy saving process. It is also low in complexity and cost, and was easily retrofitted to Dunwell existing plant.

Project Award(s)

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    "HK Awards for Industry 2005 - Machinery and Equipment Design Category" in 2005