Study on Industrial Ecologies and Impacts of Implementation of Environmental Management System for Metal and Petrochemical Industries (I) - Metal Industry Part One: A Study on the Industrial Ecology for Taiwan’s Metal Industry
Date Issued
2002-07-31
Date
2002-07-31
Author(s)
張慶源
DOI
902621Z002025
Abstract
The human economic development
may trigger the deterioration of
environmental quality. To prevent the
situation from becoming worse, the
environmental protection and resource
recycling must be conducted thoroughly.
However, the economic growth should
also be deliberated simultaneously. Thus
they influence each other. Therefore, the
optimistic way is to consider the
combination of environmental protection
and economic growth in order to pursue
the sustainable development. This
concept has cultivated the introduction and
application of industrial ecology (IE). It
includes the material flow, energy flow,
and capital flow systems. This study was
focused on the material flows of steel and
iron for Taiwan’s steel industry. In the
first part of the study, the IE model
presented by Graedel and Allenby [1] for
the other industries was applied to assess
the circumstance in Taiwan. Also, in the
second part of the present analysis, two
recognized indicators, the per capita of use
(PCU, defined as production/population in
this study) and intensity of use (IU,
defined as production/GDP in the present
analysis) were used to compare the
situation in Taiwan with those in the
U.S.A. and Japan.
Six approaches were postulated to
describe the IE scenario of the material
flows of steel and iron for the steel
industry in Taiwan with five nodes.
These included : 1) Approaches 3 and 4
concerning the individual stream of the
steel materials uncollected, discarded, or
left in the environment (denoted as Munj)
and change of inventory (denoted as
dImj/dt) for each node j with j = 1 to 5, 2)
Approaches 1 and 5 taking into account
the individual Munj but lumped dΣImj/dt,
and 3) Approaches 2 and 6 with the
consideration of both lumped ΣMunj
and dΣImj/dt. IE model with the
lumped computations ofΣMunj and dΣ
Imj/dt for all nodes in the IE model
reasonably revealed the material flows of
steel and iron for Taiwan’s steel industry.
The average values of the PCUs of
the three noted countries are in order of
Japan > Taiwan > U.S.A. However,
Japan showed a slightly downward trend
in terms of the yearly variation of PCUs,
while Taiwan upward. The results
indicate that the demand of steel and iron
in Taiwan have remained higher in
supporting its development in the recent
years. The IUs of steel and iron for the
steel industries of the U.S.A. and Japan
are lower than that of Taiwan, revealing
the better uses of steel and iron by the
U.S.A. and Japan to contribute to the GDP.
The results of PCUs and IUs also
demonstrate that there still has room to
improve for the better usage of steel and
iron in the steel industry and thus the
quality of the environment in Taiwan.
Subjects
Industrial ecology
material
flow
flow
steel industry
per capita of use
intensity
of use
of use
SDGs
Publisher
臺北市：國立臺灣大學環境工程學研究所
Type
report
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