Steps to construct eco-industrial chain
2.1. Link points and links analysis
This article, based on the research by Chen et al. [25], further
proposed that the comprehensively usable semi-finished goods and
energy carrier reaching cascaded utilization in production process
of different industries work as link points, and the directive physical,
chemical and biological processes after energy and material flow
of different industries connected by link points serve as links.
Then material and energy flow metabolism in production and
technological process of each industry in the studied area [26] was
examined to find out the categories of energy, resource, products
and by-products input into or output from each industry, and analyze
the link points and links on the basis of studied metabolism results.
This is the first step to construct an eco-industrial chain.