Energy Efficiency and Influencing Factors of Wastewater Treatment Plants in Yangtze River Economic Belt

被引：0

作者：

Wang H. ^{[1
,2
]}

Huang R. ^{[1
,2
]}

Xie L. ^{[1
]}

Ni X. ^{[1
]}

机构：

[1] Key Laboratory of Yangtze River Water Environment of Ministry of Education, Tongji University, Shanghai

[2] Tongji University Sustainable Development And New Type Urbanization THINK-TANK, Tongji University, Shanghai

来源：

Tongji Daxue Xuebao/Journal of Tongji University | 2022年 / 50卷 / 02期

关键词：

Data envelopment analysis; Energy efficiency indicator; Wastewater treatment plants; Yangtze River Economic Belt;

D O I：

10.11908/j.issn.0253-374x.21528

中图分类号：

学科分类号：

摘要：

The energy efficiency indicators of 970 WWTPs in the Yangtze River Economic Belt (YREB) were evaluated, including the energy intensity (EI) via normalization and the relative energy efficiency (REE) via data envelopment analysis. Meanwhile, influencing factors of designing, operational conditions, and externalities were analyzed. The results show that the EIs of 970 WWTPs change from 0.10 to 1.84 kWh·m-3 and from 0.41 to 1.42 kWh·kg-1 in terms of wastewater treated and COD removed, while the variation range of REE is 0.02~2.35. The impact of scale effect on energy efficiency is significant. The WWTPs configured with activated sludge-based processes tend to own better performance on energy efficiency. Besides, relatively higher pollutant concentrations in influent and less strict discharge standards would facilitate the energy efficiency. Finally, WWTPs in subregions of upstream, midstream, and downstream in YREB have different energy efficiency situations. This phenomenon is resulted from the factors such as designing factors, operational conditions, and externalities of WWTPs. This paper is expected to provide theoretical basis and technical support for energy-saving and emission-reduction of WWTPs. © 2022, Editorial Department of Journal of Tongji University. All right reserved.

引用

页码：178 / 186

页数：8

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