Carbon-Neutrality in Wastewater Treatment Plants: Advanced Technologies for Efficient Operation and Energy/Resource Recovery

Bae, Sungjun; Kim, Young Mo

doi:10.3390/en14248514

Cited by 11 publications

(5 citation statements)

References 28 publications

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“…It was also possible to confirm the linkages between the water and forest sectors. Also noteworthy, regarding Topic 6 (water management), the purification and management of wastewater is not simply about supplying and managing sustainable water, but is related to achieving carbon neutrality [48,49]. There have been more attempts to find solutions for achieving carbon neutrality through eco-friendly energy from biotechnologies, and there have been numerous studies on producing biomass from wastewater [50][51][52][53].…”

Section: Discussionmentioning

confidence: 99%

Analysis of Nature-Based Solutions Research Trends and Integrated Means of Implementation in Climate Change

Choi,

Kim,

Chae

et al. 2023

Atmosphere

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Nature-based solutions (NbS) is an approach to solving climate change and social issues based on nature. Despite NbS being widely studied as an effective method to solve social problems, the trends in NbS research have hardly been analyzed. Therefore, this study examined change patterns in NbS-related research topics over time and analyzed the interactions of NbS research and relevant activities in various fields. After reviewing research papers based on the search term ‘nature-based solutions’ on Scopus, and collecting 1567 research papers, we conducted dynamic topic modeling (DTM) and network analysis. The papers were classified into 19 topics via DTM. Water, forest, and urban topics made up the greatest portion of NbS research, while NbS topics in the forest sector showed a steady increase over time. This study also found close connections between NbS studies on forests and other sectors and confirmed that the forest sector can become an integrated means of contributing to climate change responses and other resultant social issues. This study demonstrates that DTM and network analysis are useful tools for understanding the trends in NbS research and finding the linkages between various fields.

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Section: Discussionmentioning

confidence: 99%

Analysis of Nature-Based Solutions Research Trends and Integrated Means of Implementation in Climate Change

Choi,

Kim,

Chae

et al. 2023

Atmosphere

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“…South Korea has committed to net-zero CO 2 emissions by 2050, with an interim goal of a 40% reduction in CO 2 emissions by 2030 compared to the 2018 levels [3]. "Carbon neutrality", the state of net-zero carbon dioxide emissions, has become an important goal in the sustainable development of essential distributed utilities like energy and water [4]. Consequently, numerous government organizations and utility companies are transitioning to low-carbon solutions [5,6].…”

Section: Introductionmentioning

confidence: 99%

Estimation of Energy Consumption and CO2 Emissions of the Water Supply Sector: A Seoul Metropolitan City (SMC) Case Study

Li,

Lee,

Kang

2024

Water

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A model that computes the per-unit process energy consumption, energy intensity, CO2 emission, and CO2 intensity of water treatment plants is developed. This model is used to estimate the total energy consumption of six water treatment plants in Seoul Metropolitan City (SMC), which is comprised 80–85% for finished water pumping, 6–10% for ozone disinfection, 2–4% for rapid mixing, and 1–3% for non-process loads. The model results are validated against actual data for 2020 and 2021. The net energy consumption considering renewable energy production and use is then calculated, and the corresponding level of CO2 emissions is predicted. Four scenarios based on the projected water requirements for the year 2045 were evaluated as follows: increased energy efficiency in finished water pumping (Scenario 1), increased renewable energy production in water treatment plants (Scenario 2), increased energy efficiency in raw water pumping (Scenario 3), and reduced water supply per capita (Scenario 4). Compared to a baseline do-nothing scenario (Scenario 0), the net energy consumption is reduced by 3.57%, 2.61%, 3.42%, and 4.67% for Scenarios 1–4, respectively. Scenario 4, which is a water-driven approach, is best for reducing CO2 emissions, while Scenario 1 and 3, which are energy-driven approaches, are more effective at reducing CO2 intensity.

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“…In the circular economy, recovery and recycling of resources are becoming more critical perspectives in wastewater treatment beyond reducing the contaminants [1,2]. Carbon neutrality is presently a much-debated topic for wastewater treatment plants, involving conversations around the reduction of energy consumption, energy resources recovery, and greenhouse gas (GHG) emissions [3][4][5]. Under these global circumstances, technological innovations for resource recovery are essential in wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%

Review and Opinions on the Research, Development and Application of Microalgae Culture Technologies for Resource Recovery from Wastewater

You

Deng

Wang

et al. 2023

Water

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Wastewater is an abundant source of nutrients and energy. Under the circumstances of circular economy and carbon neutrality, resource recovery from wastewater has recently been motivated. The microalgal process is a promising alternative for resource recovery from wastewater, and it possesses potential for the cost reduction of wastewater treatment and fertilizer production, energy generation, and greenhouse gas emissions reduction. This paper reviews and discusses state-of-the-art microalgal process development, including microalgal species screening, configuration, biotic consortia construction, infection avoidance, nutrients balancing, operational parameter optimization, and biomass harvesting enhancement. Due to the lack of literature on practical applications, the microalgal process lacks economic and environmental feasibility assessments. Life cycle assessments from the perspective of circular economy and carbon neutrality on upscaled microalgal processes are required for various wastewater scenarios. To promote the upscaled application and successful implementation, efforts are also suggested to establish utilization guidelines, advanced recommendations, reliable standards, and proper safety evaluation criteria. This work could provide a reference and direct the follow-up research, development, and application of microalgae (MA)-based processes for resource recovery from wastewater.

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Carbon-Neutrality in Wastewater Treatment Plants: Advanced Technologies for Efficient Operation and Energy/Resource Recovery

Abstract: Recently, “carbon neutrality”, the state of net-zero carbon dioxide emission, has been one of the most frequently used terms in the sustainable development of environmental and energy industries [...]

Cited by 11 publications

References 28 publications

Analysis of Nature-Based Solutions Research Trends and Integrated Means of Implementation in Climate Change

Analysis of Nature-Based Solutions Research Trends and Integrated Means of Implementation in Climate Change

Estimation of Energy Consumption and CO2 Emissions of the Water Supply Sector: A Seoul Metropolitan City (SMC) Case Study

Review and Opinions on the Research, Development and Application of Microalgae Culture Technologies for Resource Recovery from Wastewater

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