Next Article in Journal
Hydraulic Optimization of Double Chamber Surge Tank Using NSGA-II
Previous Article in Journal
Twenty-First Century Streamflow and Climate Change in Forest Catchments of the Central Appalachian Mountains Region, US
Open AccessArticle

Eco-Efficiency of End-of-Pie Systems: An Extended Environmental Cost Efficiency Framework for Wastewater Treatment

1
College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
2
Yuyang Water Conservancy bureau, Zhengzhou 450000, China
3
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
*
Author to whom correspondence should be addressed.
Water 2020, 12(2), 454; https://doi.org/10.3390/w12020454
Received: 16 January 2020 / Revised: 3 February 2020 / Accepted: 6 February 2020 / Published: 8 February 2020
(This article belongs to the Section Water and Wastewater Treatment)
As a method for eco-efficiency analysis, environmental cost efficiency (ECE) indicators have been proposed for the end-of-pie (EOP) systems that referred to the techniques achieving environmental benefit under economic cost. The wastewater treatment plant (WWTP) belongs to the EOP systems; however, few studies used the ECE indicators for the sustainability evaluation. Here, this study first proposed the following processes that had been excluded in the current ECE framework and thus limited the potential application in WWTP: (1) the direct impact of wastewater on receiving water, (2) the migration and transformation of water pollutants affected by the self-purification mechanisms of receiving water. To address the aforementioned processes, this study extended the framework of ECE indicators by means of incorporating the potential growth of microorganisms as the characterization state and integrating the water quality models with the characterization models. To investigate the applicability, a full-scale WWTP was selected as the study case and the eco-efficiency of the increasing levels of sewage treatment was evaluated. The case outcome showed that, with the extended ECE indicators, the analysis of eco-efficiency could be directly related to the specific locations and could determine the specific distance ranges within which the scenarios changing were considered efficient. Moreover, the eco-efficiency could be investigated under more concrete and flexible situations because the extended framework of ECE indicators was able to include more information, such as different types of receiving water or different environmental conditions of certain water body.
Keywords: eco-efficiency; life cycle assessment; wastewater treatment; depletion of dissolved oxygen; water quality model eco-efficiency; life cycle assessment; wastewater treatment; depletion of dissolved oxygen; water quality model
MDPI and ACS Style

Zhao, X.; Zhang, C.; Bai, S. Eco-Efficiency of End-of-Pie Systems: An Extended Environmental Cost Efficiency Framework for Wastewater Treatment. Water 2020, 12, 454.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop