Page 59 - Shaping A Sustainable Future

This demonstration allowed us to understand the Coolant Usage: Annually, each machine will use up to
process, and we then decided to focus on this area four drums of coolant. Each drum is 200 litres. This
for improvement to help the company save costs and equates to 800 litres per machine. With 35 machines,
reduce its carbon footprint at the same time. coolant usage is 35 x 800 litres = 28,000 litres. This
translates to 28 cubic meters of water content. The
Water usage is shown in Table 1. There are 35 CNC coolant mixture ratio to water is 1:25 (1 Unit coolant: 25
machines in the company. Each machine uses 8 litres Units of water).
of coolant and 200 litres of water during operation.
Annually, each device will use four drums of coolant.
Each drum is 200 litres, and every top-up is 200 litres. Good Environmental Practices
With that, 20,000 litres of water are needed for the
machines. We calculated that if we could save on coolant One of the good environmental practices we witnessed
usage, we could save water usage simultaneously. With is the company’s willingness to recycle and reuse the
this information, we calculate that that water usage coolant. They took the extra step to clean and filter the
for the operation of 35 devices is 35 x 20,000 litres = coolant to save environmental resources, commendable.
700,000 litres, which equates to 700 cubic meters per They were also very forthcoming in hearing our view on
annum. saving energy.

1 Machine uses 8 L of Coolant with 200 L of Water
1 Drum of Coolant = 200 L
200 L/8 L=25 Times of Top Up For one drum of coolant

Before After

4 Drums Coolant: 25 X 4= 100 Top-up 3 Drums of Coolant: 25 X 3 = 75 Top-up

Water: 1 Time = 200 litres of water

100 Times of water usage: 200 litres X 100 75 Times of water usage: 200 litres X 75
= 20,000 litres of water per year = 15,000 litres of water per year

In Conclusion, 25 % (5000 litres) of water savings for 1 Year

Table 1: Water and coolant saving comparison.

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