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Environmental Performance 45
37.0
37.6
41
40
39
38
37
36
35
40.5
39.4
2012
2013
2014
2015
2016
m
3
per million MJ of town gas
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!%
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38.4
Water Consumption (m
3
) per Million MJ of Town Gas Produced
To produce gas, we require a reliable water supply. However, as fresh water sources are precious and
scarce, regionally and globally, we try to reduce our water consumption by enacting a range of measures
at our plants.
Rainwater Harvesting System
This system collects rainwater from the Naphtha
Tank Bund Area. We use the treated rainwater in
our gas production, saving an estimated 27,800
cubic metres each year.
Case study
This competition is one of our major initiatives for improving the Company’s environmental
performance in mainland China. In 2016, we broadened the scope of the competition to include
carbon reduction projects from our Hong Kong operations. We welcomed a total of 27 entrants,
which resulted in annual savings of 64,500 tonnes of carbon emissions.
One of our projects came from Suzhou Industrial Park Qingyuan Hong Kong & China Water
Company Limited (Qingyuan Hua Yan). The business owns two water treatment plants and
provides fresh water for the surrounding area. Qingyuan Hua Yan utilised Big Data Platform
to develop a mathematical model which maximises the water supply energy efficiency at
two plants. By comparing the individual water supply quantity and the respective power
consumption under different water supply levels, Qingyuan Hua Yan was able to determine the
plants’ optimum output profiles with the lowest possible power consumption.
Annual carbon reduction: 2,400 tonnes
Annual economic benefits: RMB1.6 million
Carbon Reduction Competition 2016
Water Conservation
Hong Kong
Tai Po Gas Production Plant Water Conservation Initiatives
Reverse Osmosis System (RO)
We reuse the surplus concentrate from our RO
system as make-up water for our cooling tower,
which makes an estimated saving of 118,000 cubic
metres annually.