A Dynamic Comparison Sustainability Study of Standard Wastewater Treatment System in the Straw Pulp Papermaking Process and Printing & Dyeing Papermaking Process Based on the Hybrid Neural Network and Emergy Framework

Abstract

Sustainability study of the standard wastewater treatment system is the pivotal procedure in the water protection field. In order to better study the sustainability of sewage treatment systems, wastewater treatment system of straw pulp papermaking (WTSPP) and wastewater treatment system of printing and dyeing and papermaking (WTPDP) have been selected to assess the sustainable level in China. Based on the hybrid neural network and emergy framework, WTSPP and WTPDP were considered and analyzed in this paper. Therein, three types of indicators were used to evaluate these two systems, including basic structure emergy indicators (BEI), functional emergy indicators (FEI), and eco-efficiency emergy indicators (EEI). Through the basic neural network model and detailed neural network model design, the iteration paths and algorithm operation diagram of WTSPP and WTPDP were designed and realized in this article. Primary contents include: (1) For WTSPP and WTPDP, nonrenewable resources emergy are both the primary contributor and account for roughly 62.5% and 53.7%, respectively. (2) As the important indicator group, the environmental loading ratio (ELR) is 176 in the WTSPP and 323 in the WTPDP, respectively. Emergy sustainability indicators (ESIs) in the WTSPP and WTPDP, are 0.015 and 0.014, respectively. (3) Depending on fluctuation degrees, WTSPP is better than WTPDP. The maximum fluctuation ranges of WTSPP and WTPDP are (3%, −27%) and (28%, 61%), respectively. (4) All neural network analysis results manifest that the emergy sustainability indicators (ESIs) of WTSPP and WTPDP are [0.0151, 0.011] and [0.0179, 0.0055] in view of a long-term predictive view, respectively.

Study on the Choice of Wastewater Treatment Process Based on the Emergy Theory

“…analysis framework [31]. The emergy approach has also compared two managem schemes for biosolids generated from wastewater treatment plants [32].…”

“…Eco-efficiency indices based on emergy and LCA were used to assess the sustainable use of two wastewater treatment plants [30]. A wastewater treatment system of straw pulp papermaking and a wastewater treatment system of printing, dyeing, and papermaking were selected to evaluate the sustainability level of wastewater treatment systems in China, based on a hybrid neural network and emergy analysis framework [31]. The emergy approach has also compared two management schemes for biosolids generated from wastewater treatment plants [32].…”

Sustainability Investigation in the Building Cement Production System Based on the LCA-Emergy Method

“…As an ecological economic concept, the emergy approach has provided a new perspective for sustainability; based on its inherent advantages, it has been used in a wide range of applications, including national sustainability assessments [12], city sustainability studies [13][14][15][16], industry evaluations [17][18][19], building system research [20,21], water system protection directions [22][23][24], material fields [25][26][27], waste areas [28], etc. For example, the world coastal ecosystem was chosen to assess sustainability based on the emergy method [12].…”

Emergy-Based Assessment and Suggestions for Sustainable Development of Regional Ecological Economy: A Case Study of Anhui Province, China

“…Moreover, other scholars used the SBM model to evaluate the sustainable development ability of some cities in China [11][12][13]. Zhang et al [14] adopted the SBM model to eliminate the influence of scale factors using the three-stage data envelop analysis (DEA) method to calculate the sustainable development efficiency of 31 provinces and cities in China. The weighted SBM considering energy substitutability was used to evaluate the regional energy efficiency (EE) of 29 provinces in China from 1991 to 2015.…”