水资源
高士总用水量的60%用于染色,这是线生产过程中最重要的部分之一。 高士正在投资购买低浴比的新机器。我们还正在探索数字印刷技术的创新发展以及提供的无水染色机会。
领导层声音
“Water is currently an essential
resource in our processes,
principally for dyeing. We know
that increasing global demands
on water use for domestic and
industrial purposes are likely
to make this already precious
resource scarcer in the future,
and we therefore take our
responsibilities in this area
very seriously. Our approach
is to use as little water as we
can and to make sure that we
then recycle as much of that
water as possible. Periodically
we assess the water stress
level and availability for each
of our plants, and this informs
our investment strategy. We
recognise that this is a shared
resource and that we must
ensure that our use does not
lead to shortages for others.
Our long-term vision is to
largely eliminate water from
our processes, and we are
investing in the development
of the technologies that look
likely to deliver this goal. In the
short-term our target for water
reduction is very ambitious
but we believe it is achievable
through the concerted work of
our process engineers across the
globe.”
Michael Schofer,首席供应链官
Water Strategy
Water is predominantly used in our dyeing processes. Here it acts as the medium for applying dyes
to our yarns or is used for rinsing and washing yarns before and after dyeing. In the form of steam
it is also the medium used for heating water used in processing or for applying curing heat in some
coating processes.
Our long-term vision is of processes that are waterless, and our investment in 2018 in Twine, a
start-up company developing yarn digital dyeing processes that use no water, was partly aimed at
helping to deliver that long-term goal. Twine launched their first generation of sampling machines
in June 2019, to much industry interest, and we look forward to working with them on the
development and implementation of their technology in the coming years.
In the meantime, our goal is to continue to reduce our use of water and hence to help safeguard
this natural but limited resource. Our goal is to reduce our water usage intensity by 40% by 2022
against our 2018 baseline. This requires a further acceleration in water saving initiatives compared
to the 28% saving that we achieved in the six years up to 2018. Up to the end of 2019 we have undertaken detailed water balance studies in 31 of our major plants, accounting for 62% of our total water usage. These studies enable us to map the water into each process in the plant and
then determine the opportunities for reducing water usage through process changes.
A number of global and site level projects have been initiated during 2019 as a result of these
studies which will impact on water usage in 2020 and beyond. During 2019 our water usage
dropped by 2% against 2018, and we are confident that we will see this accelerate in 2020.
Reducing water use
in traditional dyeing
machines
The new generation of dyeing machines are more
water efficient than older ones. The intrinsic water
efficiency of a machine is measured by the liquor
ratio. This is the ratio of water to thread once
the machine is filled, and typical older machines
will operate at a ratio of 8:1 while more modern
machines, can operate at 4.5:1. This is a 44%
saving in water for the same output, and is largely
achieved by improved design of pumps and
pipework. However, while all our new machines
are low liquor ratio designs, with almost 2000
dyeing machines in use, we have a lot of older
machines that still have years of life in them.
Our team in Bangladesh have been challenging
themselves to find ways to achieve lower liquor
ratios on old machines without modifying the
machines themselves. Through a combination of
maximising the thread load, optimising the water
level, rationalising flow direction and adjusting the
pump speeds they have managed to reduce the
liquor ratio from 8:1 to 6.5:1, a 19% reduction
in water used. The water saving also impacts on
energy use as a lower water volume takes less heat
energy to raise it to operating temperatures.
We will be spreading this innovative approach
across other dyehouses in 2020.
Read more case studies
水:明智地管理珍贵资源 |
指标 |
单位 |
2014 |
2015 |
2016 |
2017 |
2018 |
2018
restated1 |
2019 |
总用水量
|
百万立方米
|
8.3 |
8.3 |
8.2 |
8.0 |
7.9 |
7.7 |
7.4 |
水强度
|
每公斤染色产品/升
|
127 |
121 |
118 |
112 |
109 |
92 |
90 |
12018 data has been restated without NA Crafts, with Gotex and Patrick Yarn Mills and with finished goods output basis to help with like for like comparisons to 2019
有关我们历史表现的更多信息,请下载我们的完整数据披露。