Abstract
With the increase in industrialization and urbanization, water pollution has become increasingly serious, and wastewater treatment has become a common step in preventing this. For a greater understanding of the sustainability of different wastewater treatment systems, two processes, Anaerobic Baffled Reactor + Anaerobic-Anoxic-Oxic and Anaerobic Baffled Reactor + Cyclic Activated Sludge System, were selected, and their sustainability was evaluated based on three indicators, namely emergy yield ratio, environmental load rate, and emergy sustainability development index, according to emergy theory. The results show that the emergy yield ratio and environmental load rate of the ABR + CASS process were lower than those of the ABR + A2/O process, and the emergy sustainability development index of the ABR + CASS process was higher than that of the ABR + A2/O process, showing better sustainability. The research methods and findings of this study play an important role for decision makers in selecting sustainable wastewater treatment processes.
Highlights
The World Water Development Report, released in March 2018, states that global water demand is increasing at an annual rate of 1% due to factors such as population growth, changes in economic development patterns, and diversification of consumption patterns [1]
To ensure a safe and stable operation, high-quality effluent, and sludge water content of appropriate standards, decreasing the energy consumption and further pollution of the environment by wastewater treatment is a top priority for urban wastewater treatment plants
Compared to other studies [12,15], the present study of wastewater treatment processes using the emergy analysis method considered the economic benefits of different treatment processes and their influence on the environment, and fully considered the natural resources used during wastewater treatment processes
Summary
The World Water Development Report, released in March 2018, states that global water demand is increasing at an annual rate of 1% due to factors such as population growth, changes in economic development patterns, and diversification of consumption patterns [1]. TeSu(EcLhR)a, asntduedmyerigsyvsiutsatlaintoabiilmitypdroevveelotphmeenutribnadnex e(EcoSIl)o, gfriocmalaesnuvstiarionnabmleent, ach dsuevsetlaoipnmabenlet pdeervspeeloctpivme,eonfttwofotwheasetecownaotemr my,aannagdemimenptrsoyvsetemthse, bqausaedlitoynothfeliefme eforgryresiden theory, to facilitate the selection of a more suitable wastewater treatment process Such a s2t.uMdyaitsevriitaallstoanimdpMroveeththoedusrban ecological environment, achieve sustainable development of the economy, and improve the quality of life for residents. In China, the shortcomings of the traditional activated sludge method include high infrastructure, operational costs, and energy consumption; complicated management; easy occurrence of sludge expansion and floating; inability to remove nitrogen, phosphorus, and other inorganic nutrients quickly, resulting in serious long-term environmental pollution; process equipment failing to meet the requirements of high efficiency and low consumption; and huge wastewater collection far exceeding its own investment value, causing great waste. The required data related to wastewater treatment process were obtained with the help of relevant staff
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
