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application : Waste Emulsified
Cutting Fluid Disposal
emulsified fluid is mainly used
as coolant and lubricant in
metal cutting and steel mill
cold roll processes. But the
disposal treatment cost is very
high and creates serious pollution
issue. Recently, Dunwell solved
this issue for the largest multi-national
listed semi-conductor machinery
manufacturer at low cost and
environmental friendly way.
emulsified fluid contains plenty
of water. Not only have no recycle
value but also need to pay for
disposal. In-house treatment
is expensive and takes lots
of space. For metal cutting
fluid, the chemical bondage
between oil and water is much
stronger than that in cold roll
industry. Therefore, large amount
of strong chemicals are required
to break the bonds. Cost is
high and the result is still
not satisfactory. Large amount
of sludge is produced which
causes secondary pollution.
If by incineration, energy cost
is high because of high water
content. Membrane technology
was tried before but the fouling
is the major issue.
apply vibratory membrane technology,
VMAT, to solve membrane-fouling
issue and achieve high concentration
ratio. No chemicals are used.
The concentrate is incinerated.
Permeate is recycled for preparing
new coolant. No sewage is discharged.
One unit takes up space less
than 2 square meters, can handle
up to 3,000 litres per day.
From financial and environmental
considerations, VMAT is a very