ENVIRONMENT
through a ‘greywater’ treatment plant each day, where it is made safe for use in airport restrooms, for gardening and cooling. Each year a total of 1.71 million tons of water is reused in this way.
Just next door to this facility, a new and renewable demonstration complex, featuring 100kW photovoltaic solar panels, five 10kW wind turbines and 30 units of hybrid streetlights has been built, generating 195MWh and offsetting 4.3% of the greywater plant’s energy use. A resource recovery facility incinerates some 140 tons of waste per day, separating out recyclable materials. In a very literal example of recycling, the energy and heat produced by this facility is then used to power the greywater facility, further enhancing its environmental and financial savings.
In a similar vein, Incheon Airport installed sludge-drying equipment at the incinerator complex in partnership with engineers ESCO in 2009, which dries excess heat generated by incineration of resources and dries greywater sludge, which is then used as fuel. Using this to power its facilities allowed the gateway to save $136,555 in liquefied natural gas (LNG) a year.
The airport may be spending an average of $24.7 million per year on its environmental programme, but technology alone will not be enough to achieve all its goals, says Shin, emphasising that education is at least as important.
“It is pretty much 50/50; we have to introduce high grade facilities to increase our operational efficiency, but staff also have to change their behaviour, for example, we can introduce LED lights to reduce power use, but if staff don’t turn off the lamp the benefit is lost. You need to change the mind set, that is very important,” says Shin. To change hearts and minds, so to speak, a twice-yearly educational programme has been introduced, complemented by awareness campaigns to highlight specific energy saving issues. Shin gives the example of paper fans given out to staff last year as an alternative to using air conditioning.
Within the terminal itself, Incheon Airport has developed a number of energy saving devices, such as movement sensitive travelators and escalators, and there is one, which Shin proudly explains has been pioneered at Incheon – a time-sensitive light control system.
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