Page 175 - Shaping A Sustainable Future

We have also calculated the electricity consumption of • Power of a fluorescent light when turned on
the lights. for 11 hours a day: 18W × 11 hours = 198W or
0.198KW/H.
• Fluorescent lights: 18W
• Number of lights in company: 70 • Total electricity usage for all lights in a day:
• Electricity rate: 0.17219 0.198 × 70 lights = 13.86KW/H.
• Number of hours lights are on 11 Hours
• Total electricity bill for all lights in a month:
We calculated the estimated electricity usage of the 13.86KW/H × 30 days × 0.172 = $71.50
lights in the company using the specifications in Figure
2.
Before the disposal of general waste, one round of metal
recycling is performed, as shown in Table 4.

Figure 2: The specifications of the fluorescent light

Volume Approximately 1,800KG of general waste is disposed of every three months. The waste includes
contaminated plastic used to store used cables.

Type Recycling metals such as stainless steel, aluminium, and copper is conducted before the remaining
general waste is disposed of.

Method of Disposal Wastes that are not reusable or recyclable are disposed of through a public waste recycling
company. The company, Teo Bak Soah, is certified to carry out waste disposal services of organic
and inorganic waste that comply with the standards of the National Environment Agency
(Singapore).

Table 4: Waste disposal

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