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Zhang Y, Ni X, Wang H. Visual analysis of greenhouse gas emissions from sewage treatment plants based on CiteSpace: from the perspective of bibliometrics. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:45555-45569. [PMID: 36807038 DOI: 10.1007/s11356-023-25582-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 01/23/2023] [Indexed: 06/18/2023]
Abstract
With the global reduction actions of greenhouse gas (GHG) emissions, environmental facilities, including sewage treatment plants (STPs), need to reduce pollutants while minimizing GHG emissions. Therefore, more and more publications revealed the formation mechanism of GHGs in STPs and committed to finding better reduction schemes. From the perspective of bibliometrics, this study used CiteSpace to conduct quantitative and visual analysis based on 1,543 publications retrieved from Web of Science between 2000 and 2021 around the world. We have systematically evaluated the structure, development trend, hot spots, and research frontier in the field of GHG emissions from STPs and compared with the contents of top journals to verify the scientificity of the analysis. The results show that the number of publications has increased year by year, and the networks of authors and institutions show a strong correlation. Among them, the clusters of nitrous oxide, anaerobic digestion, and life cycle assessment (LCA) started earlier and received extensive attention, which derived other clusters in the research process. With the development of the field, researchers have gradually changed from single water treatment facilities to multi-carriers that can realize energy regeneration and utilization simultaneously. Accordingly, the GHG reduction of STPs through energy regeneration and resource recovery has become a hot point and frontier direction, which also challenges the breakthroughs in relevant technologies. Furthermore, it provides scientific support for the formulation of relevant incentive policies and economic subsidy systems, so as to alleviate the pressure of global warming and realize the sustainable development of STPs concurrently.
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Affiliation(s)
- Yidi Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, 1239 Siping Rd, Shanghai, 200092, China
| | - Xiaohang Ni
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, 1239 Siping Rd, Shanghai, 200092, China
| | - Hongtao Wang
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, 1239 Siping Rd, Shanghai, 200092, China.
- Shanghai Institute of Pollution Control and Ecological Security, Tongji University, 1239 Siping Rd, Shanghai, 200092, China.
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2
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Orner KD, Smith S, Nordahl S, Chakrabarti A, Breunig H, Scown CD, Leverenz H, Nelson KL, Horvath A. Environmental and Economic Impacts of Managing Nutrients in Digestate Derived from Sewage Sludge and High-Strength Organic Waste. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:17256-17265. [PMID: 36409840 DOI: 10.1021/acs.est.2c04020] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Increasingly stringent limits on nutrient discharges are motivating water resource recovery facilities (WRRFs) to consider the implementation of sidestream nutrient removal or recovery technologies. To further increase biogas production and reduce landfilled waste, WRRFs with excess anaerobic digestion capacity can accept other high-strength organic waste (HSOW) streams. The goal of this study was to characterize and evaluate the life-cycle global warming potential (GWP), eutrophication potential, and economic costs and benefits of sidestream nutrient management and biosolid management strategies following digestion of sewage sludge augmented by HSOW. Five sidestream nutrient management strategies were analyzed using environmental life-cycle assessment (LCA) and life-cycle cost analysis (LCCA) for codigestion of municipal sewage sludge with and without HSOW. As expected, thermal stripping and ammonia stripping were characterized by a much lower eutrophication potential than no sidestream treatment; significantly higher fertilizer prices would be needed for this revenue stream to cover the capital and chemical costs. Composting all biosolids dramatically reduced the GWP relative to the baseline biosolid option but had slightly higher eutrophication potential. These complex environmental and economic tradeoffs require utilities to consider their social, environmental, and economic values in addition to present or upcoming nutrient discharge limits prior to making decisions in sidestream and biosolids management.
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Affiliation(s)
- Kevin D Orner
- Department of Civil and Environmental Engineering, University of California, Berkeley, California 94720, United States
- National Science Foundation Engineering Research Center for Re-inventing the Nation's Urban Water Infrastructure, Berkeley, California 94720, United States
| | - Sarah Smith
- Energy Analysis and Environmental Impacts Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Sarah Nordahl
- Department of Civil and Environmental Engineering, University of California, Berkeley, California 94720, United States
- Energy Analysis and Environmental Impacts Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Alicia Chakrabarti
- East Bay Municipal Utility District, Oakland, California 94607, United States
| | - Hanna Breunig
- Energy Analysis and Environmental Impacts Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Corinne D Scown
- Energy Analysis and Environmental Impacts Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Energy and Biosciences Institute, University of California, Berkeley, California 94720, United States
- Life-Cycle, Economics, and Agronomy Division, Joint BioEnergy Institute, Emeryville, California 94608, United States
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Harold Leverenz
- Department of Civil and Environmental Engineering, University of California, Davis, California 95616, United States
| | - Kara L Nelson
- Department of Civil and Environmental Engineering, University of California, Berkeley, California 94720, United States
- National Science Foundation Engineering Research Center for Re-inventing the Nation's Urban Water Infrastructure, Berkeley, California 94720, United States
| | - Arpad Horvath
- Department of Civil and Environmental Engineering, University of California, Berkeley, California 94720, United States
- National Science Foundation Engineering Research Center for Re-inventing the Nation's Urban Water Infrastructure, Berkeley, California 94720, United States
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Estévez S, González-García S, Feijoo G, Moreira MT. How decentralized treatment can contribute to the symbiosis between environmental protection and resource recovery. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 812:151485. [PMID: 34742805 DOI: 10.1016/j.scitotenv.2021.151485] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 10/15/2021] [Accepted: 11/02/2021] [Indexed: 06/13/2023]
Abstract
Challenges associated with the sustainability of the water cycle pose new opportunities for resource recovery and greater environmental protection. While centralized wastewater treatment plants must evolve in their design and operation to adapt to a scenario of increasing demand for water, resources and energy, the decentralized approach emerges as an option to be considered in small communities or developing residential areas where bioenergy production can be improved through the recovery of organic matter in segregated streams or where the investment in the sewer network for connection to a centralized facility may be technologically or economically unfeasible. The main objective of this work is to evaluate the environmental and economic profile of a hybrid-decentralized configuration for the purpose of efficient wastewater management and resource recovery and its comparative evaluation with the centralized treatment scenario. Beyond water reclamation, decentralized treatment offers the possibility of valorization of digestate streams as nutrient sources for horticultural or ornamental crops in the vicinity of the plant. Based on the results of the environmental profile, this manuscript shows that the decentralized treatment approach is in line with the philosophy and guidelines of the circular economy, as it allows the use of reclaimed water and biofertilizers under safe and environmental-friendly conditions.
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Affiliation(s)
- Sofía Estévez
- Department of Chemical Engineering, CRETUS, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
| | - Sara González-García
- Department of Chemical Engineering, CRETUS, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Gumersindo Feijoo
- Department of Chemical Engineering, CRETUS, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - María Teresa Moreira
- Department of Chemical Engineering, CRETUS, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
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Combining Process Modelling and LCA to Assess the Environmental Impacts of Wastewater Treatment Innovations. WATER 2021. [DOI: 10.3390/w13091246] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Alternative wastewater treatment (WWT) technologies with lower environmental impacts seem to be the way forward in the pursuit of sustainable wastewater treatment plants (WWTPs). Process modelling of material and energy flows together with life-cycle assessment (LCA) can help to better understand these impacts and show the right direction for their development. Here, we apply this combined approach to three scenarios: conventional WWT; conventional WWT + chemically enhanced primary treatment (CEPT); conventional WWT + CEPT + side stream partial nitritation/anammox (PN/A). For each scenario, equations were developed to calculate chemical oxygen demand and nitrogen flow (solid and dissolved form) through the WWTP and to estimate the energy demands of its unit operations. LCA showed that the main environmental impact categories for all scenarios were global warming potential (GWP), eutrophication potential (EP) and marine aquatic eco-toxicity potential (MAETP). Compared with conventional WWT, CEPT and CEPT combined with PN/A resulted in a higher sum of normalized and weighed environmental indicators, by 19.5% and 16.4%, respectively (20.0% and 18.3% including biogenic carbon). Interestingly, the environmentally positive features of the alternative scenarios were often traded-off against other increased negative impacts. This suggests that further development is needed to consider these technologies a sustainable alternative.
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Morelli B, Cashman S, Ma XC, Turgeon J, Arden S, Garland J. Environmental and cost benefits of co-digesting food waste at wastewater treatment facilities. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2020; 82:227-241. [PMID: 32941165 PMCID: PMC7899238 DOI: 10.2166/wst.2020.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The wastewater industry is undergoing a paradigm shift from focusing solely on treatment to incorporating concepts aimed at mitigating environmental impacts such as energy and nutrient recovery and water reuse. This study uses life cycle assessment and life cycle cost analysis to investigate the effect of expanding anaerobic digestion (AD) capacity and adding combined heat and power on environmental and cost indicators at a mid-sized wastewater treatment facility (WWTF) in Massachusetts, USA. Since 2014, Massachusetts has banned the disposal of organic waste from commercial organizations producing more than one ton of material per week. The WWTF's additional digester capacity allows the co-digestion of municipal solids with a food-based engineered bioslurry due to this ban. Study data were compiled for several AD feedstock quantity and performance scenarios, and compared to a baseline scenario representative of historic plant operations prior to co-digestion. Reductions in environmental impact are demonstrated for six of eight environmental impacts, including global climate change potential and cumulative energy demand. Eutrophication potential increases by 10 percent and 24 percent across assessed scenarios. Water use remains relatively constant across scenarios. Facility energy production increases dramatically with co-digestion, satisfying 100 percent of the WWTF's thermal energy requirement and producing surplus electricity assuming full AD capacity utilization.
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Affiliation(s)
- Ben Morelli
- Eastern Research Group, 110 Hartwell Ave., Lexington, MA 02421, USA
| | - Sarah Cashman
- Eastern Research Group, 110 Hartwell Ave., Lexington, MA 02421, USA
| | - Xin Cissy Ma
- United States Environmental Protection Agency, Center for Environmental Solutions and Emergency Response, Water Infrastructure Division, 26 West Martin Luther King Drive, Cincinnati, OH 45268, USA E-mail:
| | - Jason Turgeon
- United States Environmental Protection Agency, Region 1, 5 Post Office Square, Suite 100, OEP 5-2, Boston, MA 02109, USA
| | - Sam Arden
- Eastern Research Group, 110 Hartwell Ave., Lexington, MA 02421, USA
| | - Jay Garland
- United States Environmental Protection Agency, Center for Environmental Solutions and Emergency Response, Immediate Office 26 West Martin Luther King Drive, Cincinnati, OH 45268, USA
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6
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Life Cycle Assessment of Community-Based Sewer Mining: Integrated Heat Recovery and Fit-For-Purpose Water Reuse. ENVIRONMENTS 2020. [DOI: 10.3390/environments7050036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Municipal sewage contains significant embedded resources in the form of chemical and thermal energy. Recent developments in sustainable technology have pushed for the integration of resource recovery from household wastewater to achieve net zero energy consumption and carbon-neutral communities. Sewage heat recovery and fit-for-purpose water reuse are options to optimize the resource recovery potential of municipal wastewater. This study presents a comparative life cycle assessment (LCA) focused on global warming potential (GWP), eutrophication potential (EUP), and human health carcinogenic potential (HHCP) of an integrated sewage heat recovery and water reuse system for a hypothetical community of 30,000 people. Conventional space and water heating components generally demonstrated the highest GWP contribution between the different system components evaluated. Sewage-heat-recovery-based district heating offered better environmental performance overall. Lower impact contributions were demonstrated by scenarios with a membrane bioreactor (MBR) and chlorination prior to water reuse applications compared to scenarios that use more traditional water and wastewater treatment technologies and discharge. The LCA findings show that integrating MBR wastewater treatment and water reuse into a district heating schema could provide additional environmental savings at a community scale.
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Waldron B, Gui D, Liu Y, Feng L, Dai H. Assessing water distribution and agricultural expansion in the Cele Oasis, China. ENVIRONMENTAL MONITORING AND ASSESSMENT 2020; 192:288. [PMID: 32297013 PMCID: PMC7160086 DOI: 10.1007/s10661-020-8233-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 03/23/2020] [Indexed: 06/11/2023]
Abstract
Oases support 90% of the province's inhabitants and produce more than 95% of the social wealth in Xinjiang Province of China. Oases' dependency on water availability from mountainous regions plays a critical factor in the sustainability of agricultural practices and oasis expansion. In this study, we have chosen the Cele Oasis located in the south rim of the Taklimakan Desert, typical of oases in the region, as a case study to examine water availability. With over 97% of Cele's economy tied to agriculture, unfettered expansion of the oasis into the desert has raised concern on water availability. A spatial and temporal analysis of water availability is performed using newly available data to determine whether agricultural production within the Cele Oasis has overexploited available water resources or if feasible expansion of agricultural production is feasible beyond its current boundary. Transferability of the methodology for assessing water availability spatially and temporally will be beneficial to other oases in the arid region that face similar concerns.
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Affiliation(s)
| | - Dongwei Gui
- Xinjiang Institute of Ecology and Geography, Urumqi, Xinjiang China
| | - Yi Liu
- Xinjiang Institute of Ecology and Geography, Urumqi, Xinjiang China
| | | | - Heng Dai
- Jinan University, Guangzhou, Guangdong China
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Wu H, Yang F, Li H, Li Q, Zhang F, Ba Y, Cui L, Sun L, Lv T, Wang N, Zhu J. Heavy metal pollution and health risk assessment of agricultural soil near a smelter in an industrial city in China. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2020; 30:174-186. [PMID: 30810352 DOI: 10.1080/09603123.2019.1584666] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 02/15/2019] [Indexed: 06/09/2023]
Abstract
To assess heavy metal pollution and human health risk, a total of 28 topsoil samples were collected during four seasons from seven agricultural soil sites near a famous smelter in Jiyuan, China. The maximum concentrations of Cd, Pb, Hg, As, Zn, Cu, Ni, and Cr were 26.00, 2601.00, 3.29, 65.00, 410.00, 156.30, 54.80, and 73.60 mg kg-1, respectively. Compared with the sampling site nearest to the smelter, the concentrations of six metals at the farthest site were decreased significantly (P < 0.05). All sites were heavily contaminated, with Nemerow index (P) >3.0, and all sites had very high ecological risks related to Cd and Hg. The non-carcinogenic risk for children (based on combined exposure to the eight metals) was above the safety level. The carcinogenic risk of As for adults (8.98 × 10-6) and children (1.49 × 10-5) exceeded the acceptable level (1 × 10-6). Results suggest a serious health risk in the polluted areas, particularly for children.Abbreviation Cd: Cadmium; Pb: Lead; Hg: Mercury; As: Arsenic; Zn: Zinc; Cu: Copper; Ni: Nickel; Cr: Chromium; P: Nemerow index; RI: Potential ecological risk index; Ei: Monomial potential ecological risk of a specific heavy metal; HI: non-carcinogenic hazard index; CR: Carcinogenic risk; TN: Total nitrogen; TP: Total phosphorus; OM: Organic matter; MC: Moisture content; ADD: Average daily dose.
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Affiliation(s)
- Huiying Wu
- Department of Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou, Henan, China
| | - Fan Yang
- Department of Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou, Henan, China
| | - Hongping Li
- Department of Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou, Henan, China
| | - Qingbo Li
- Zhejiang Biosan Biochemical Technologies Co. Ltd., Hangzhou, Zhejiang, China
| | - Fengli Zhang
- Luoyang Orthopedic Hospital of Henan Province, Luoyang, Henan, China
| | - Yue Ba
- Department of Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou, Henan, China
| | - Liuxin Cui
- Department of Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou, Henan, China
| | - Lianglong Sun
- Department of Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou, Henan, China
| | - Tianchen Lv
- Department of Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou, Henan, China
| | - Na Wang
- Department of Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou, Henan, China
| | - Jingyuan Zhu
- Department of Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou, Henan, China
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Dayour F, Adongo CA, Kimbu AN. Insurance uptake among small and medium-sized tourism and hospitality enterprises in a resource-scarce environment. TOURISM MANAGEMENT PERSPECTIVES 2020; 34:100674. [PMID: 32289008 PMCID: PMC7141640 DOI: 10.1016/j.tmp.2020.100674] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 03/28/2020] [Accepted: 03/30/2020] [Indexed: 05/21/2023]
Abstract
Small and medium-sized tourism and hospitality enterprises (SMTHEs) are often susceptible to various hazards, which result in risk concerns. Insurance is recognised as one of the risk management strategies, but evidence indicates that insurance uptake among SMTHEs has been low. Yet, researchers have hardly researched into the factors that influence insurance uptake among SMTHEs. Two-hundred and fifty (250) respondents were selected using a multi-stage sampling technique. Confirmatory factor analysis, multivariate logit and probit regression techniques were used to determine factors underlying SMTHEs' insurance uptake. Risk concerns, the firm's characteristics, the perceived benefits of insurance and other informal risk coping mechanisms, as well as insurance service provision concerns were identified as determinants of insurance uptake. This is one of the first papers to offer a holistic understanding of the factors influencing SMTHEs' insurance subscription in a resource-scarce destination of Sub-Saharan Africa. The practical and theoretical implications of the paper are discussed.
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Affiliation(s)
- Frederick Dayour
- Department of Community Development, University for Development Studies, Ghana
- School of Tourism and Hospitality, University of Johannesburg, South Africa
- Corresponding author.
| | - Charles A. Adongo
- Department of Hospitality and Tourism Management, University of Cape Coast, Cape Coast, Ghana
| | - Albert N. Kimbu
- School of Hospitality and Tourism Management, University of Surrey, UK
- School of Tourism and Hospitality, University of Johannesburg, South Africa
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