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Environmental Performance 41
In the past, landfill gas – a by-product of Hong Kong’s landfill sites – was flared off, which meant it
contributed to the city’s GHG emissions. However, landfill gas is a potential source of energy. The
following visual explains our landfill gas story:
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Began harnessing landfill gas from the Shuen Wan landfill site for small-scale use
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Landfill gas generated at the North East New Territories (NENT) landfill was treated and
transferred to our Tai Po production plant and replaced some of the naphtha used as heating fuel
in our town gas production
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The construction of SENT Landfill Gas Treatment Plant was completed by end of 2016 and will
be commissioned in the first half of 2017. Landfill gas is treated to synthetic natural gas that
has impurities removed, and is transported to a regulating station in Tseng Lan Shue where it is
injected into the towngas supply network
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Environmental Benefits:
Reduce naphtha consumption by 13,000 tonnes per year, offset 56,000
tonnes of carbon emissions per year (equivalent to planting 2.4 million trees)
Harnessing Landfill Gas
1999
2007
2016
Case study
In 2016, in what was the first ever commercially viable
CHP project in Hong Kong, treated landfill gas from the
North East New Territories (NENT) site was used to fuel
the CHP system at the Alice Ho Miu Ling Nethersole
Hospital. The project harnesses renewable energy and
will reduce carbon emissions by an anticipated 2,000
tonnes per year, equivalent to planting 87,000 trees.
Moreover, it will improve overall efficiency to more than
80%, with complete utilisation of electrical and thermal
energy.
Combined Heat and Power System (CHP) with landfill gas