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Filonchyk M, Peterson MP, Zhang L, Hurynovich V, He Y. Greenhouse gases emissions and global climate change: Examining the influence of CO 2, CH 4, and N 2O. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 935:173359. [PMID: 38768722 DOI: 10.1016/j.scitotenv.2024.173359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 05/05/2024] [Accepted: 05/17/2024] [Indexed: 05/22/2024]
Abstract
An in-depth analysis of the role of greenhouse gases (GHGs) in climate change is examined here along with their diverse sources, including the combustion of fossil fuels, agriculture, and industrial processes. Key GHG components such as carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) are considered, along with data on emissions across various economic sectors. The consequences of climate change are also highlighted, ranging from more frequent and intense extreme weather events to rising sea levels and impacts on ecosystems and human health. The industrial revolution and unrestricted use of fossil fuels are key factors leading to an increase in GHG concentrations in the atmosphere. Global efforts to reduce emissions are considered, starting with the 1997 Kyoto Protocol and culminating in the 2015 Paris Agreement. The limited effectiveness of early initiatives is underscored, emphasizing the significant importance of the Paris Agreement that provides a global framework for establishing goals to reduce GHG emissions by country. The Green Climate Fund and other international financial mechanisms are also considered as essential tools for financing sustainable projects in developing countries. The global community faces the challenge and necessity for more ambitious efforts to achieve the set goals for reducing GHG emissions. Successful strategies are examined by Sweden, Costa Rica, and Denmark to achieve zero GHG emissions that integrate renewable energy sources and technologies. The importance of global cooperation for creating a sustainable future is also emphasized.
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Affiliation(s)
- Mikalai Filonchyk
- Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou 730070, China; National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring, Lanzhou 730070, Gansu, China; Gansu Provincial Engineering Laboratory for National Geographic State Monitoring, Lanzhou 730070, China.
| | - Michael P Peterson
- Department of Geography/Geology, University of Nebraska Omaha, Omaha, NE 68182, USA
| | - Lifeng Zhang
- Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou 730070, China; National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring, Lanzhou 730070, Gansu, China; Gansu Provincial Engineering Laboratory for National Geographic State Monitoring, Lanzhou 730070, China
| | - Volha Hurynovich
- Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou 730070, China; National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring, Lanzhou 730070, Gansu, China; Gansu Provincial Engineering Laboratory for National Geographic State Monitoring, Lanzhou 730070, China
| | - Yi He
- Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou 730070, China; National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring, Lanzhou 730070, Gansu, China; Gansu Provincial Engineering Laboratory for National Geographic State Monitoring, Lanzhou 730070, China
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Nizzy AM, Kannan S, Kanmani S. Utilization of plant-derived wastes as the potential biohydrogen source: a sustainable strategy for waste management. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:34839-34858. [PMID: 38744759 DOI: 10.1007/s11356-024-33610-5] [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: 10/01/2023] [Accepted: 05/04/2024] [Indexed: 05/16/2024]
Abstract
The sustainable economy has shown a renewed interest in acquiring access to the resources required to promote innovative practices that favor recycling and the reuse of existing, unconsidered things over newly produced ones. The production of biohydrogen through dark anaerobic fermentation of organic wastes is one of the intriguing possibilities for replacing fossil-based fuels through the circular economy. At present, plant-derived waste from the agro-based industry is the main global concern. When these wastes are improperly disposed of in landfills, they become the habitat for several pathogens. Additionally, it contaminates surface water as a result of runoff, and the leachate that is created from the waste enters groundwater and degrades its quality. However, cellulose and hemicellulose-rich plant wastes from agriculture fields and agro-based industries have been employed as the most efficient feedstock since carbohydrates are the primary substrate for the synthesis of biohydrogen. To produce biohydrogen from plant-derived wastes on a large scale, it is necessary to explore comprehensive knowledge of lab-scale parameters and pretreatment strategies. This paper summarizes the problems associated with the improper management of plant-derived wastes and discusses the recent developments in dark fermentation and substrate pretreatment techniques with the goal of gaining significant insight into the biohydrogen production process. It also highlights the utilization of anaerobic digestate, which is left over after biohydrogen gas as feedstock for the development of value-added products such as volatile fatty acids (VFA), biochar, and biofertilizer.
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Affiliation(s)
| | - Suruli Kannan
- Department of Environmental Studies, School of Energy Sciences, Madurai Kamaraj University, Madurai, Tamil Nadu, 625021, India
| | - Sellappa Kanmani
- Centre for Environmental Studies, Anna University, Chennai, Tamil Nadu, 625021, India
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3
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Moeini B, Barati M, Khazaei M, Tapak L, Hashemian M. In-depth analysis to develop a social marketing model to promote women's participation in waste segregation behaviour: A qualitative study. Heliyon 2024; 10:e28690. [PMID: 38571602 PMCID: PMC10988043 DOI: 10.1016/j.heliyon.2024.e28690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 03/06/2024] [Accepted: 03/22/2024] [Indexed: 04/05/2024] Open
Abstract
Waste separation is one of the key factors in managing solid waste and creating a healthy environment. Waste separation at source has always been associated with challenges. Therefore, this study was conducted to determine the perceptions of housewives and related parties regarding the factors that influence waste separation behaviour and to identify approaches to improve behaviour based on the social marketing framework. This study was conducted as a qualitative content analysis in Amol City in 2022. The data was collected through semi-structured individual interviews. A total of 25 housewives were selected as main participants and 5 stakeholders through purposive selection. The results of the study included lack of awareness of recyclable materials (product), personal, family and environmental barriers (price), lack of doorstep collection of dry waste (place), and lack of use of appropriate technology (promotion). The lack of financial resources, inappropriate political measures and the coronavirus pandemic were also the causes of this challenge. Most participants cited environmental and educational deficits as the main reason for not separating waste. It is possible to improve waste sorting behaviour at source through appropriate behavioural interventions at the individual, social and environmental levels. Researchers can use the results of this study to design, implement and evaluate waste segregation intervention programmes for housewives.
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Affiliation(s)
- Babak Moeini
- Social Determinants of Health Research Center, Department of Public Health, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Majid Barati
- Department of Public Health, School of Public Health, Autism Spectrum Disorders Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Mohammad Khazaei
- Department of Environmental Health, School of Public Health, Research Center for Health Sciences, Health Sciences & Technology Research Institute, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Leili Tapak
- Department of Biostatistics, School of Public Health, Modelling of Noncommunicable Diseases Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Maryam Hashemian
- Health Education and Health Promotion, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
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Yang G, Liu M, Gao Y, Han S, Meng F, Ju T, Jiang J. A review on the evaluation models and impact factors of greenhouse gas emissions from municipal solid waste management processes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:27531-27553. [PMID: 38573581 DOI: 10.1007/s11356-024-33042-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 03/19/2024] [Indexed: 04/05/2024]
Abstract
The total amount of global municipal solid waste (MSW) will reach 3.5 billion tons by 2050, thereby bringing tremendous environmental pressure, especially global warming. Large amounts of greenhouse gases (GHGs) have been released during MSW management (MSWM). Accounting for GHG emissions is a prerequisite for providing recommendations on appropriate treatment options to mitigate emissions from MSWM systems. There are many methods involved in estimating emissions. This paper summarizes the computing models commonly used in each process of the integrated MSWM system and emphasizes the influence of parameters and other factors. Compared with other disposal methods, landfilling has the highest emissions, commonly estimated using first-order decay (FOD) methods. Emission reduction can be realized through waste to energy (WtE) and resource recovery measures. IPCC is commonly used for calculating direct emissions, while LCA-based models can calculate emissions including upstream and downstream processes, whose results depend on assumptions and system boundaries. The estimation results of models vary greatly and are difficult to compare with each other. Besides, large gaps exist between the default emission factors (EFs) provided by models and those F measured in specific facilities. These findings provide a systematic view for a bettering understanding of MSW emissions as well as the estimating methods and also reveal the key points that need be developed in the future.
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Affiliation(s)
- Guodong Yang
- School of Environment, Harbin Institute of Technology, Harbin, 150001, China
- School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Mengdan Liu
- School of Environment, Tsinghua University, Beijing, 100084, China
| | - Yuchen Gao
- School of Environment, Tsinghua University, Beijing, 100084, China.
| | - Siyu Han
- School of Environment, Tsinghua University, Beijing, 100084, China
| | - Fanzhi Meng
- School of Environment, Tsinghua University, Beijing, 100084, China
| | - Tongyao Ju
- School of Environment, Tsinghua University, Beijing, 100084, China
| | - Jianguo Jiang
- School of Environment, Tsinghua University, Beijing, 100084, China
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Desai M, Campbell C, Perisetti A, Srinivasan S, Radadiya D, Patel H, Melquist S, Rex DK, Sharma P. The Environmental Impact of Gastrointestinal Procedures: A Prospective Study of Waste Generation, Energy Consumption, and Auditing in an Endoscopy Unit. Gastroenterology 2024; 166:496-502.e3. [PMID: 38123023 DOI: 10.1053/j.gastro.2023.12.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 11/27/2023] [Accepted: 12/06/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND & AIMS Gastrointestinal (GI) endoscopy procedures are critical for screening, diagnosis, and treatment of a variety of GI disorders. However, like the procedures in other medical disciplines, they are a source of environmental waste generation and energy consumption. METHODS We prospectively collected data on total waste generation, energy consumption, and the role of intraprocedural inventory audit of a single tertiary care academic endoscopy unit over a 2-month period (May-June 2022). Detailed data on items used were collected, including procedure type (esophagogastroduodenoscopy or colonoscopy), accessories, intravenous tubing, biopsy jars, linen, and personal protective equipment use. Data on endoscope reprocessing-related waste generation and energy use in the endoscopy unit (equipment, lights, and computers) were also collected. We used an endoscopy staff-guided auditing and review of the items used during procedures to determine potentially recyclable items going to landfill waste. The waste generated was stratified into biohazardous, nonbiohazardous, or potentially recyclable items. RESULTS A total of 450 consecutive procedures were analyzed for total waste management (generation and reprocessing) and energy consumption. The total waste generated during the study period was 1398.6 kg (61.6% directly going to landfill, 33.3% biohazard waste, and 5.1% sharps), averaging 3.03 kg/procedure. The average waste directly going to landfill was 219 kg per 100 procedures. The estimated total annual waste generation approximated the size of 2 football fields (1-foot-high layered waste). Endoscope reprocessing generated 194 gallons of liquid waste per day, averaging 13.85 gallons per procedure. Total energy consumption in the endoscopy unit was 277.1 kW·h energy per day; for every 100 procedures, amounting to 1200 miles of distance traveled by an average fuel efficiency car. The estimated carbon footprint for every 100 GI procedures was 1501 kg carbon dioxide (CO2) equivalent (= 1680 lbs of coal burned), which would require 1.8 acres of forests to sequester. The recyclable waste audit and review demonstrated that 20% of total waste consisted of potentially recyclable items (8.6 kg/d) that could be avoided by appropriate waste segregation of these items. CONCLUSIONS On average, every 100 GI endoscopy procedures (esophagogastroduodenoscopy/colonoscopy) are associated with 303 kg of solid waste and 1385 gallons of liquid waste generation, and 1980 kW·h energy consumption. Potentially recyclable materials account for 20% of the total waste. These data could serve as an actionable model for health systems to reduce total waste generation and decrease landfill waste and water waste toward environmentally sustainable endoscopy units.
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Affiliation(s)
- Madhav Desai
- Department of Gastroenterology, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri
| | - Carlissa Campbell
- Department of Gastroenterology, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri
| | - Abhilash Perisetti
- Department of Gastroenterology, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri
| | - Sachin Srinivasan
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Kansas School of Medicine, Kansas City, Kansas
| | - Dhruvil Radadiya
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Kansas School of Medicine, Kansas City, Kansas
| | - Harsh Patel
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Kansas School of Medicine, Kansas City, Kansas
| | - Stephanie Melquist
- Department of Gastroenterology, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri
| | - Douglas K Rex
- Division of Gastroenterology and Hepatology, Indiana University School of Medicine, Indianapolis, Indiana
| | - Prateek Sharma
- Department of Gastroenterology, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri; Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Kansas School of Medicine, Kansas City, Kansas.
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6
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Ma H, Wei Y, Fei F, Gao M, Wang Q. Whether biorefinery is a promising way to support waste source separation? From the life cycle perspective. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:168731. [PMID: 38007136 DOI: 10.1016/j.scitotenv.2023.168731] [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: 09/13/2023] [Revised: 11/06/2023] [Accepted: 11/18/2023] [Indexed: 11/27/2023]
Abstract
Since the implementation of the waste separation policy, the disposal of source-separated food waste (FW) has been more strictly required. Traditional source-separated FW treatment technologies, such as anaerobic digestion (AD) and aerobic composting (AC), suffer from low resource utilization efficiency and poor economic benefits. It is one of the main limiting factors for the promotion of waste separation. Life cycle assessment (LCA) was conducted for five municipal solid waste (MSW) treatment technologies, compared their environmental impacts, and analyzed the impact of waste separation ratios to determine whether biorefinery is a promising way to support waste source separation. The results showed that black soldier fly (BSF) treatment had the lowest net global warming potential (GWP) of all technologies, reduced by 40.8 % relative to the non-source-separated treatment. Ethanol production had the second-lowest net environmental impact potential because bioethanol replaces fossil fuel to avoid the emission of pollutants from its combustion. When two biorefinery technologies with excellent efficiency to avoid environmental impact are used to treat source-separated FW, the increase in the percentage of waste separation will help reduce the environmental impact of MSW treatment. The application of biorefinery technologies is considered a viable option for source-separated FW treatment. AC should not be widely promoted because it showed the worst net environmental benefits, and waste separation will elevate the environmental impact of its treatment process.
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Affiliation(s)
- Hongzhi Ma
- Department of Environmental Science and Engineering, University of Science and Technology, Beijing 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing 100083, China; Nanchang Institute of Science and Technology, Nanchang 330108, China
| | - Yulian Wei
- Department of Environmental Science and Engineering, University of Science and Technology, Beijing 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing 100083, China
| | - Fan Fei
- Department of Environmental Science and Engineering, University of Science and Technology, Beijing 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing 100083, China.
| | - Ming Gao
- Department of Environmental Science and Engineering, University of Science and Technology, Beijing 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing 100083, China
| | - Qunhui Wang
- Department of Environmental Science and Engineering, University of Science and Technology, Beijing 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing 100083, China
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7
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Nordahl SL, Baral NR, Helms BA, Scown CD. Complementary roles for mechanical and solvent-based recycling in low-carbon, circular polypropylene. Proc Natl Acad Sci U S A 2023; 120:e2306902120. [PMID: 37934823 PMCID: PMC10655212 DOI: 10.1073/pnas.2306902120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 09/05/2023] [Indexed: 11/09/2023] Open
Abstract
Plastic recycling presents a vexing challenge. Mechanical recycling offers substantial greenhouse gas emissions savings relative to virgin plastic production but suffers from degraded aesthetic and mechanical properties. Polypropylene, one of the most widely used and lowest-cost plastics, features methyl pendants along the polymer backbone, rendering it particularly susceptible to declining properties, performance, and aesthetics across a succession of mechanical recycles. Advanced processes, such as solvent-assisted recycling, promise near-virgin quality outputs at a greater energy and emissions footprint. Mechanical and advanced recycling are often presented as competing options, but real-world plastic waste streams are likely to require preprocessing regardless of whether they are routed to an advanced process. This study quantifies the life-cycle greenhouse gas implications of multiple recycling strategies and proposes a system in which mechanical and solvent-assisted recycling can be leveraged together to boost recycling rates and satisfy demand for a wider range of product applications. Polypropylene can be recovered from mixed-plastic bales produced at material recovery facilities and processed through mechanical recycling, with a varying fraction sent for further upgrading via solvent-assisted recycling to produce material approved for food packaging and other higher-quality applications. The resulting mechanically recycled rigid polypropylene reduces life-cycle greenhouse gas emissions by 80% relative to the same quantity of virgin material, while the upgraded higher-quality material achieves GHG savings of 30%.
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Affiliation(s)
- Sarah L. Nordahl
- Energy Analysis and Environmental Impacts Division, Lawrence Berkeley National Laboratory, Berkeley, CA94720
- Department of Civil and Environmental Engineering, University of California, Berkeley, CA94720
| | - Nawa R. Baral
- Joint BioEnergy Institute, Emeryville, CA94608
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA94720
| | - Brett A. Helms
- Joint BioEnergy Institute, Emeryville, CA94608
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA94720
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA94720
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA94720
| | - Corinne D. Scown
- Energy Analysis and Environmental Impacts Division, Lawrence Berkeley National Laboratory, Berkeley, CA94720
- Joint BioEnergy Institute, Emeryville, CA94608
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA94720
- Energy and Biosciences Institute, University of California, Berkeley, CA94720
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8
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Crutchik D, Barboza J, Vázquez-Padín JR, Pedrouso A, Val Del Río Á, Mosquera-Corral A, Campos JL. Integrating food waste management into urban wastewater treatment: Economic and environmental impacts. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 345:118517. [PMID: 37385195 DOI: 10.1016/j.jenvman.2023.118517] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 06/21/2023] [Accepted: 06/23/2023] [Indexed: 07/01/2023]
Abstract
Food waste is the main component of municipal solid waste (MSW) and its sustainable management is a global challenge. Co-treatment of food waste and urban wastewater in wastewater treatment plants (WWTPs) could be a plausible management strategy to reduce the MSW amount that is disposed in landfills, while converting its organic fraction into biogas in the WWTP. However, the increased organic load in the wastewater influent would impact the capital and operating costs of the WWTP, mainly due to the increase in sludge production. In this work, different scenarios for co-treatment of food waste and wastewater were studied from both economic and environmental perspectives. These scenarios were designed based on different sludge disposal and management options. The results showed that the co-treatment of food waste and wastewater would be more environmentally friendly than their separate treatment, but its economic feasibility strongly depends on the ratio between the management costs of MSW and sewage sludge.
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Affiliation(s)
- Dafne Crutchik
- Faculty of Engineering and Sciences, Universidad Adolfo Ibáñez, Av. Diagonal Las Torres 2640, Santiago, 7941169, Chile.
| | - Javiera Barboza
- Faculty of Engineering and Sciences, Universidad Adolfo Ibáñez, Av. Diagonal Las Torres 2640, Santiago, 7941169, Chile.
| | | | - Alba Pedrouso
- CRETUS Institute, Department of Chemical Engineering, Universidade de Santiago de Compostela, E-15705, Santiago de Compostela, Spain.
| | - Ángeles Val Del Río
- CRETUS Institute, Department of Chemical Engineering, Universidade de Santiago de Compostela, E-15705, Santiago de Compostela, Spain.
| | - Anuska Mosquera-Corral
- CRETUS Institute, Department of Chemical Engineering, Universidade de Santiago de Compostela, E-15705, Santiago de Compostela, Spain.
| | - José Luis Campos
- Faculty of Engineering and Sciences, Universidad Adolfo Ibáñez, Av. Diagonal Las Torres 2640, Santiago, 7941169, Chile.
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Gebiola M, Rodriguez MV, Garcia A, Garnica A, Tomberlin JK, Hopkins FM, Mauck KE. Bokashi fermentation of brewery's spent grains positively affects larval performance of the black soldier fly Hermetia illucens while reducing gaseous nitrogen losses. WASTE MANAGEMENT (NEW YORK, N.Y.) 2023; 171:411-420. [PMID: 37783136 DOI: 10.1016/j.wasman.2023.09.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 09/21/2023] [Accepted: 09/24/2023] [Indexed: 10/04/2023]
Abstract
Digestion of waste feedstocks by larvae of the black soldier fly Hermetia illucens (Diptera: Stratiomyidae) (BSF) results in proteins for animal feed and organic fertilizer with a reduced environmental footprint, but it can still have negative environmental effects through greenhouse gas (GHG) and ammonia (NH3) emissions. Both biomass conversion by BSF larvae and associated GHG and NH3 emissions can depend on substrate properties that may be optimized through microbial inoculation pre-treatments, such as bokashi fermentation. Here, we quantified the effects of bokashi fermentation of brewery's spent grains on BSF rearing metrics and associated GHG and NH3 emissions at benchtop scale. We found that bokashi fermentation increased larval biomass by 40% and shortened development time by over two days on average, compared with unfermented spent grains. In line with increased larval growth, CO2 emissions in BSF larvae treatments were 31.0 and 79.0% higher in the bokashi fermented spent grains and Gainesville substrates, respectively, compared to the unfermented spent grains. Adding BSF larvae to the spent grains increased cumulative N2O emissions up to 64.0 mg N2O kg substratedry-1 but there were essentially no N2O emissions when larvae were added to fermented spent grains. Bokashi fermentation also reduced NH3 fluxes from the volatilization of substrate nitrogen in the BSF larvae treatment by 83.7-85.8% during days 7 and 9, possibly by increasing N assimilation by larvae or by reducing the transformation of substrate NH4+ to NH3. Therefore, bokashi fermentation may be applied to improve performance of BSF larvae on a common industrial waste stream and reduce associated emissions.
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Affiliation(s)
- Marco Gebiola
- Department of Entomology, University of California Riverside, Riverside, CA, USA.
| | - Michael V Rodriguez
- Department of Environmental Sciences, University of California Riverside, Riverside, CA, USA.
| | - Alexandro Garcia
- Department of Entomology, University of California Riverside, Riverside, CA, USA
| | - Andrea Garnica
- Department of Entomology, University of California Riverside, Riverside, CA, USA
| | | | - Francesca M Hopkins
- Department of Environmental Sciences, University of California Riverside, Riverside, CA, USA
| | - Kerry E Mauck
- Department of Entomology, University of California Riverside, Riverside, CA, USA
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10
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Hidalgo-Crespo J, Amaya-Rivas J, Ribeiro I, Soto M, Riel A, Zwolinski P. Informal waste pickers in guayaquil: Recycling rates, environmental benefits, main barriers, and troubles. Heliyon 2023; 9:e19775. [PMID: 37809813 PMCID: PMC10559109 DOI: 10.1016/j.heliyon.2023.e19775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 08/30/2023] [Accepted: 08/31/2023] [Indexed: 10/10/2023] Open
Abstract
Systems for managing municipal solid waste are typically ineffective in developing nations because of governments' deficient financial and administrative frameworks, poor rules, and a lack of suitable infrastructure and human resources. The informal sector plays an essential role in these systems by reprocessing waste into secondary raw materials, reducing collection and disposal costs, and, most importantly, benefiting the environment by avoiding incineration and landfilling. However, their actual contributions remain unknown. The present paper aims to understand the role of informal waste pickers (IWPs) in the waste management system of Guayaquil City and their environmental impact through the calculations of the carbon footprint (CF) avoided due to their aid. The survey design gathered information on their personal profiles, types, and rates of collected recyclables, market conditions, their main barriers, and troubles regarding their formalization. The results of the survey demonstrate that waste picking is mostly a male-driven activity, the average daily mass collected per IWP is 13 kg, the most collected recyclable waste is polyethylene terephthalate, their average monthly income is $179, and the total avoided CF of the entire informal waste picking process is almost 14 thousand tons of CO2 eq yearly. Further, IWPs prefer to operate alone, and only 16% of them would join a cooperative, despite their numerous financial, logistical, and personal challenges.
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Affiliation(s)
- J. Hidalgo-Crespo
- CNRS, Grenoble INP, G-SCOP, University Grenoble Alpes, Grenoble, France
- Facultad de Ingeniería Industrial, Universidad de Guayaquil, Ecuador
| | - J.L. Amaya-Rivas
- Facultad de Ingeniería Mecánica y Ciencias de la Producción, ESPOL Polytechnic University, Escuela Superior Politécnica del Litoral, ESPOL, Guayaquil, Ecuador
| | - Inês Ribeiro
- IDMEC, Instituto Superior Técnico, Universidad de Lisboa, Portugal
| | - M. Soto
- Facultad de Ciencias, University of Coruña, A Coruña, Spain
| | - Andreas Riel
- CNRS, Grenoble INP, G-SCOP, University Grenoble Alpes, Grenoble, France
| | - Peggy Zwolinski
- CNRS, Grenoble INP, G-SCOP, University Grenoble Alpes, Grenoble, France
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11
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Liu F, Xin L, Tang H, Qin Y, Zhang L, Dong X, Zhang Y, Wu W, Wang L. Regionalized life-cycle monetization can support the transition to sustainable rural food waste management in China. NATURE FOOD 2023; 4:797-809. [PMID: 37735506 DOI: 10.1038/s43016-023-00842-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Accepted: 08/11/2023] [Indexed: 09/23/2023]
Abstract
Innovative recycling technologies can help curb food waste, yet their implementation often involves trade-offs among different environmental issues and among environmental, economic and social issues. Monetization can provide a solution to integrate all environmental impacts across the life cycle of food waste and to enable a normalized evaluation with economic accounting. Herein, a Chinese regionalized monetization model was applied to various indicators related to the environment, resource depletion and human health to assess ten typical rural food waste recycling technologies in Zhejiang province. The results reveal that biodrying and maturity and two bioconversion options are promising solutions, considering both environmental and economic impacts as well as the shifting of environmental impacts among different compartments as hidden risks. The monetization method proposed here could be applied to other sectors to support decision-making towards more sustainable development.
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Affiliation(s)
- Fang Liu
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, China
- Key Laboratory of Coastal Environment and Resources of Zhejiang Province, School of Engineering, Westlake University, Hangzhou, China
- Institute of Advanced Technology, Westlake Institute for Advanced Study, Hangzhou, China
| | - Liqing Xin
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, China
| | - Hang Tang
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, China
| | - Yong Qin
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, China
| | - Lei Zhang
- Key Laboratory of Coastal Environment and Resources of Zhejiang Province, School of Engineering, Westlake University, Hangzhou, China
- Institute of Advanced Technology, Westlake Institute for Advanced Study, Hangzhou, China
| | - Xinyue Dong
- Key Laboratory of Coastal Environment and Resources of Zhejiang Province, School of Engineering, Westlake University, Hangzhou, China
- Institute of Advanced Technology, Westlake Institute for Advanced Study, Hangzhou, China
| | - Yi Zhang
- Key Laboratory of Coastal Environment and Resources of Zhejiang Province, School of Engineering, Westlake University, Hangzhou, China
- Institute of Advanced Technology, Westlake Institute for Advanced Study, Hangzhou, China
| | - Weixiang Wu
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, China.
| | - Lei Wang
- Key Laboratory of Coastal Environment and Resources of Zhejiang Province, School of Engineering, Westlake University, Hangzhou, China.
- Institute of Advanced Technology, Westlake Institute for Advanced Study, Hangzhou, China.
- Research Center for Industries of the Future, Westlake University, Hangzhou, China.
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12
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Zhang L, Wang B, Li K, Wang Z, Xu D, Su Y, Wu D, Xie B. Non-negligible health risks caused by inhalation exposure to aldehydes and ketones during food waste treatments in megacity Shanghai. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 325:121448. [PMID: 36931489 DOI: 10.1016/j.envpol.2023.121448] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 02/19/2023] [Accepted: 03/14/2023] [Indexed: 06/18/2023]
Abstract
Aldehydes and ketones in urban air continue to receive regulatory and scientific attention for their environmental prevalence and potential health hazard. However, current knowledge of the health risks and losses caused by these pollutants in food waste (FW) treatment processes is still limited, especially under long-term exposure. Here, we presented the first comprehensive assessment of chronic exposure to 21 aldehydes and ketones in urban FW-air environments (e.g., storage site, mechanical dewatering, and composting) by coupling substantial measured data (383 samples) with Monte Carlo-based probabilistic health risk and impact assessment models. The results showed that acetaldehyde, acetone, 2-butanone and cyclohexanone were consistently the predominant pollutants, although the significant differences in pollution profiles across treatment sites and seasons (Adonis test, P < 0.001). According to the risk assessment results, the estimated cancer risk (CR; mean range: 1.6 × 10-5-1.12 × 10-4) and non-cancer risk (NCR; mean range: 2.98-22.7) triggered by aldehydes and ketones were both unacceptable in most cases (CR: 37.8%-99.3%; NCR: 54.2%-99.8%), and even reached the limit of concern to CR (1 × 10-4) in some exposure scenarios (6.18%-16.9%). Application of DALYs (disability adjusted life years) as a metric for predicting the damage suggested that exposure of workers to aldehydes and ketones over 20 years of working in FW-air environments could result in 0.02-0.14 DALYs per person. Acetaldehyde was the most harmful constituent of all targeted pollutants, which contributed to the vast majority of health risks (>88%) and losses (>90%). This study highlights aldehydes and ketones in FW treatments may be the critical pollutants to pose inhalation risks.
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Affiliation(s)
- Liangmao Zhang
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China
| | - Binghan Wang
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China
| | - Kaiyi Li
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China
| | - Zijiang Wang
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China
| | - Dan Xu
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China
| | - Yinglong Su
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China
| | - Dong Wu
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China
| | - Bing Xie
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China; Engineering Research Center for Nanophotonics & Advanced Instrument, Ministry of Education, East China Normal University, Shanghai, 200241, China.
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13
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Chen F, Gu X, Yu H, Zhang X, Wang Y. The temporal and spatial characteristics and influencing factors of CO 2 emissions from municipal solid waste in China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:59540-59553. [PMID: 37009979 DOI: 10.1007/s11356-023-26658-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Accepted: 03/22/2023] [Indexed: 05/10/2023]
Abstract
Understanding the temporal and spatial characteristics of carbon dioxide (CO2) emissions from municipal solid waste (MSW) and a quantitative evaluation of the contribution rate of the factors influencing the changes in CO2 emissions are important for pollution and emission reduction and the realization of the "double carbon" goal. This study analyzed the spatial and temporal evolution of waste generation and treatment based on panel data from 31 Chinese provinces over the past 15 years and then applied the logarithmic mean Divisia index (LMDI) model to study the driving factors of CO2 emissions from MSW. China's MSW production and CO2 emissions displayed a rising trend, and the overall CO2 emissions showed a geographical pattern of being high in the east and low in the west. Carbon emission intensity, economic output, urbanization level, and population size were positive factors that increased CO2 emissions. The most important factors driving CO2 emissions were carbon emission intensity and economic output, with cumulative contribution rates of 55.29% and 47.91%, respectively. Solid waste emission intensity was a negative factor in reducing CO2 emissions, with a cumulative contribution rate of -24.52%. These results have important implications for the design of policies to reduce CO2 emissions from MSW.
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Affiliation(s)
- Feiyu Chen
- School of Economics and Management, China University of Mining and Technology, Xuzhou, 221116, China
| | - Xiao Gu
- School of Economics and Management, China University of Mining and Technology, Xuzhou, 221116, China.
| | - Haimiao Yu
- School of Economics and Management, China University of Mining and Technology, Xuzhou, 221116, China
| | - Xiaolin Zhang
- School of Economics and Management, China University of Mining and Technology, Xuzhou, 221116, China
| | - Yujie Wang
- College of Economics and Management, Taiyuan University of Technology, Taiyuan, 030024, China
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14
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Zhu J, Luo Z, Sun T, Li W, Zhou W, Wang X, Fei X, Tong H, Yin K. Cradle-to-grave emissions from food loss and waste represent half of total greenhouse gas emissions from food systems. NATURE FOOD 2023; 4:247-256. [PMID: 37118273 DOI: 10.1038/s43016-023-00710-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 02/03/2023] [Indexed: 04/30/2023]
Abstract
Global greenhouse gas (GHG) emissions from food loss and waste (FLW) are not well characterized from cradle to grave. Here GHG emissions due to FLW in supply chain and waste management systems are quantified, followed by an assessment of the GHG emission reductions that could be achieved by policy and technological interventions. Global FLW emitted 9.3 Gt of CO2 equivalent from the supply chain and waste management systems in 2017, which accounted for about half of the global annual GHG emissions from the whole food system. The sources of FLW emissions are widely distributed across nine post-farming stages and vary according to country, region and food category. Income level, technology availability and prevailing dietary pattern also affect the country and regional FLW emissions. Halving FLW generation, halving meat consumption and enhancing FLW management technologies are the strategies we assess for FLW emission reductions. The region-specific and food-category-specific outcomes and the trade-off in emission reductions between supply chain and waste management are elucidated. These insights may help decision makers localize and optimize intervention strategies for sustainable FLW management.
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Affiliation(s)
- Jingyu Zhu
- Department of Environmental Engineering, School of Biology and the Environment, Nanjing Forestry University, Nanjing, China
| | - Zhenyi Luo
- Department of Environmental Engineering, School of Biology and the Environment, Nanjing Forestry University, Nanjing, China
| | - Tingting Sun
- Department of Environmental Engineering, School of Biology and the Environment, Nanjing Forestry University, Nanjing, China
| | - Wenxuan Li
- Department of Civil and Environmental Engineering, National University of Singapore, Singapore, Singapore
| | - Wei Zhou
- Department of Environmental Engineering, School of Biology and the Environment, Nanjing Forestry University, Nanjing, China
| | - Xiaonan Wang
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, Singapore
- Department of Chemical Engineering, Tsinghua University, Beijing, P.R. China
| | - Xunchang Fei
- School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, Singapore.
| | | | - Ke Yin
- Department of Environmental Engineering, School of Biology and the Environment, Nanjing Forestry University, Nanjing, China.
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15
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Wang Y, Baral NR, Yang M, Scown CD. Co-Processing Agricultural Residues and Wet Organic Waste Can Produce Lower-Cost Carbon-Negative Fuels and Bioplastics. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:2958-2969. [PMID: 36747467 PMCID: PMC9948286 DOI: 10.1021/acs.est.2c06674] [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] [Received: 09/12/2022] [Revised: 01/20/2023] [Accepted: 01/24/2023] [Indexed: 06/18/2023]
Abstract
Scalable, low-cost biofuel and biochemical production can accelerate progress on the path to a more circular carbon economy and reduced dependence on crude oil. Rather than producing a single fuel product, lignocellulosic biorefineries have the potential to serve as hubs for the production of fuels, production of petrochemical replacements, and treatment of high-moisture organic waste. A detailed techno-economic analysis and life-cycle greenhouse gas assessment are developed to explore the cost and emission impacts of integrated corn stover-to-ethanol biorefineries that incorporate both codigestion of organic wastes and different strategies for utilizing biogas, including onsite energy generation, upgrading to bio-compressed natural gas (bioCNG), conversion to poly(3-hydroxybutyrate) (PHB) bioplastic, and conversion to single-cell protein (SCP). We find that codigesting manure or a combination of manure and food waste alongside process wastewater can reduce the biorefinery's total costs per metric ton of CO2 equivalent mitigated by half or more. Upgrading biogas to bioCNG is the most cost-effective climate mitigation strategy, while upgrading biogas to PHB or SCP is competitive with combusting biogas onsite.
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Affiliation(s)
- Yan Wang
- Energy
& Biosciences Institute, University
of California, Berkeley, 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
| | - Nawa R. Baral
- 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
| | - Minliang Yang
- 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
| | - Corinne D. Scown
- Energy
& Biosciences Institute, University
of California, Berkeley, 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
- Energy
Analysis and Environmental Impacts Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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16
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Nordahl S, Preble CV, Kirchstetter TW, Scown CD. Greenhouse Gas and Air Pollutant Emissions from Composting. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:2235-2247. [PMID: 36719708 PMCID: PMC9933540 DOI: 10.1021/acs.est.2c05846] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 01/19/2023] [Accepted: 01/19/2023] [Indexed: 05/25/2023]
Abstract
Composting can divert organic waste from landfills, reduce landfill methane emissions, and recycle nutrients back to soils. However, the composting process is also a source of greenhouse gas and air pollutant emissions. Researchers, regulators, and policy decision-makers all rely on emissions estimates to develop local emissions inventories and weigh competing waste diversion options, yet reported emission factors are difficult to interpret and highly variable. This review explores the impacts of waste characteristics, pretreatment processes, and composting conditions on CO2, CH4, N2O, NH3, and VOC emissions by critically reviewing and analyzing 388 emission factors from 46 studies. The values reported to date suggest that CH4 is the single largest contributor to 100-year global warming potential (GWP100) for yard waste composting, comprising approximately 80% of the total GWP100. For nitrogen-rich wastes including manure, mixed municipal organic waste, and wastewater treatment sludge, N2O is the largest contributor to GWP100, accounting for half to as much as 90% of the total GWP100. If waste is anaerobically digested prior to composting, N2O, NH3, and VOC emissions tend to decrease relative to composting the untreated waste. Effective pile management and aeration are key to minimizing CH4 emissions. However, forced aeration can increase NH3 emissions in some cases.
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Affiliation(s)
- Sarah
L. Nordahl
- Energy
Technologies Area, Lawrence Berkeley National
Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
- Department
of Civil and Environmental Engineering, University of California, Berkeley, Berkeley, California 94720, United States
| | - Chelsea V. Preble
- Energy
Technologies Area, Lawrence Berkeley National
Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
- Department
of Civil and Environmental Engineering, University of California, Berkeley, Berkeley, California 94720, United States
| | - Thomas W. Kirchstetter
- Energy
Technologies Area, Lawrence Berkeley National
Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
- Department
of Civil and Environmental Engineering, University of California, Berkeley, Berkeley, California 94720, United States
| | - Corinne D. Scown
- Energy
Technologies Area, Lawrence Berkeley National
Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
- Biosciences
Area, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
- Joint
BioEnergy Institute, 5885 Hollis Street, Emeryville, California 94608, United States
- Energy
& Biosciences Institute, University
of California, Berkeley, Berkeley, California 94720, United States
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17
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Mouronte-López ML, Subirán M. Analysis of Worldwide Greenhouse and Carbon Monoxide Gas Emissions: Which Countries Exhibit a Special Pattern? A Closer Look via Twitter. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH 2023; 17:19. [PMID: 36694839 PMCID: PMC9853490 DOI: 10.1007/s41742-023-00510-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 01/03/2023] [Accepted: 01/07/2023] [Indexed: 06/17/2023]
Abstract
UNLABELLED There is significant global concern about the harmful effects of greenhouse gas and carbon monoxide emissions (deforestation, air pollution, global warming, etc.). The 2015 Paris Agreement on climate change aspires to reduce global warming by achieving a climate-neutral world. Research has been carried out to calculate and diminish the aforementioned emissions in waste, power industry, transport, building, in addition to other areas. The aim of this paper is to analyse the carbon and greenhouse gas emissions across countries around the globe in order to find patterns and correlate them to socio-economic indicators [gross national income (GNI), industrial production (IPI) and human development indexes (HDI)] as well as Twitter interactions regarding climate change. For this purpose, time series and socio-economic data have been downloaded from different repositories including EDGAR (Emissions Database for Global Atmospheric Research), World Bank and UNDP (United Nations Development Programme). Although classical clustering algorithms have already been used in the examination of some environmental issues, we use a non-parametric time series clustering method, which has been suggested in certain scientific literature as a more flexible approach, since any ad hoc parametric assumptions are required. The chosen socio-economic indicators have also demonstrated their relevance in pieces of research related to various fields. With respect to Twitter, which is one of the most popular social networks nowadays, significant analysis has also been performed on the basis of capturing citizens' perceptions on a multitude of matters. We found that several countries such as Brazil, India, China, Nigeria, Russia, United States, Spain, Andorra, Greece, and Qatar show differences in carbon and greenhouse gas emissions patterns. Besides, there does not seem to be a correlation between GNI, IPI and HDI as well as the above mentioned emissions ( correlation < 0.16 ) . Regarding Twitter interactions, a dissimilarity in the distribution of hashtags was detected between the aforementioned countries and the rest of the world. This research can help to identify countries in which more governmental measures are needed to reduce the type of emissions analysed in certain industrial sectors. In addition, it points out the topics related to climate change that seem to generate the most debate on Twitter for countries with an unusual pattern. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s41742-023-00510-4.
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Affiliation(s)
- Mary Luz Mouronte-López
- Higher Polytechnic School, Universidad Francisco de Vitoria, Carretera de Pozuelo a Majadahonda km. 1.800, 28223 Pozuelo de Alarcón, Madrid Spain
| | - Marta Subirán
- Higher Polytechnic School, Universidad Francisco de Vitoria, Carretera de Pozuelo a Majadahonda km. 1.800, 28223 Pozuelo de Alarcón, Madrid Spain
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18
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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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19
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Miller JH, Tifft SM, Wiatrowski MR, Benavides PT, Huq NA, Christensen ED, Alleman T, Hays C, Luecke J, Kneucker CM, Haugen SJ, Sànchez i Nogué V, Karp EM, Hawkins TR, Singh A, Vardon DR. Screening and evaluation of biomass upgrading strategies for sustainable transportation fuel production with biomass-derived volatile fatty acids. iScience 2022; 25:105384. [DOI: 10.1016/j.isci.2022.105384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 09/26/2022] [Accepted: 10/14/2022] [Indexed: 11/09/2022] Open
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20
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Huang D, Gao L, Cheng M, Yan M, Zhang G, Chen S, Du L, Wang G, Li R, Tao J, Zhou W, Yin L. Carbon and N conservation during composting: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 840:156355. [PMID: 35654189 DOI: 10.1016/j.scitotenv.2022.156355] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 05/26/2022] [Accepted: 05/26/2022] [Indexed: 06/15/2023]
Abstract
Composting, as a conventional solid waste treatment method, plays an essential role in carbon and nitrogen conservation, thereby reducing the loss of nutrients and energy. However, some carbon- and nitrogen-containing gases are inevitably released during the process of composting due to the different operating conditions, resulting in carbon and nitrogen losses. To overcome this obstacle, many researchers have been trying to optimize the adjustment parameters and add some amendments (i.e., pHysical amendments, chemical amendments and microbial amendments) to reduce the losses and enhance carbon and nitrogen conservation. However, investigation regarding mechanisms for the conservation of carbon and nitrogen are limited. Therefore, this review summarizes the studies on physical amendments, chemical amendments and microbial amendments and proposes underlying mechanisms for the enhancement of carbon and nitrogen conservation: adsorption or conversion, and also evaluates their contribution to the mitigation of the greenhouse effect, providing a theoretical basis for subsequent composting-related researchers to better improve carbon and nitrogen conservation measures. This paper also suggests that: assessing the contribution of composting as a process to global greenhouse gas mitigation requires a complete life cycle evaluation of composting. The current lack of compost clinker impact on carbon and nitrogen sequestration capacity of the application site needs to be explored by more research workers.
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Affiliation(s)
- Danlian Huang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China.
| | - Lan Gao
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
| | - Min Cheng
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
| | - Ming Yan
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
| | - Gaoxia Zhang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
| | - Sha Chen
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
| | - Li Du
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
| | - Guangfu Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
| | - Ruijin Li
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
| | - Jiaxi Tao
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
| | - Wei Zhou
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
| | - Lingshi Yin
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
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21
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Microorganisms as New Sources of Energy. ENERGIES 2022. [DOI: 10.3390/en15176365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The use of fossil energy sources has a negative impact on the economic and socio-political stability of specific regions and countries, causing environmental changes due to the emission of greenhouse gases. Moreover, the stocks of mineral energy are limited, causing the demand for new types and forms of energy. Biomass is a renewable energy source and represents an alternative to fossil energy sources. Microorganisms produce energy from the substrate and biomass, i.e., from substances in the microenvironment, to maintain their metabolism and life. However, specialized microorganisms also produce specific metabolites under almost abiotic circumstances that often do not have the immediate task of sustaining their own lives. This paper presents the action of biogenic and biogenic–thermogenic microorganisms, which produce methane, alcohols, lipids, triglycerides, and hydrogen, thus often creating renewable energy from waste biomass. Furthermore, some microorganisms acquire new or improved properties through genetic interventions for producing significant amounts of energy. In this way, they clean the environment and can consume greenhouse gases. Particularly suitable are blue-green algae or cyanobacteria but also some otherwise pathogenic microorganisms (E. coli, Klebsiella, and others), as well as many other specialized microorganisms that show an incredible ability to adapt. Microorganisms can change the current paradigm, energy–environment, and open up countless opportunities for producing new energy sources, especially hydrogen, which is an ideal energy source for all systems (biological, physical, technological). Developing such energy production technologies can significantly change the already achieved critical level of greenhouse gases that significantly affect the climate.
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22
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Phutthimethakul L, Supakata N. Partial Replacement of Municipal Incinerated Bottom Ash and PET Pellets as Fine Aggregate in Cement Mortars. Polymers (Basel) 2022; 14:polym14132597. [PMID: 35808643 PMCID: PMC9269149 DOI: 10.3390/polym14132597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 06/16/2022] [Accepted: 06/23/2022] [Indexed: 01/27/2023] Open
Abstract
The objective of this study was to examine the optimal mixing ratio of municipal incinerated bottom ash (MIBA) and PET pellets used as a partial replacement of fine aggregates in the manufacture of cement mortars. As a partial replacement for sand, 15 mortar specimens were prepared by mixing 0%, 10%, 20%, 30%, and 40% municipal incinerated bottom ash (MIBA) (A) and 0%, 10%, and 20% PET pellets (P) in 5 cm × 5 cm × 5 cm cube molds. The cement/aggregate ratio was 1:3, and the water/cement ratio was 0.5 for all specimens. The results showed that the compressive strength of cement mortars decreased when increasing the amount of MIBA and PET pellets. The mortar specimens with 10% PET pellets achieved the highest compressive strength (49.53 MPa), whereas the mortar specimens with 40% MIBA and 20% PET pellets achieved the lowest compressive strength (24.44 MPa). Based on this finding, replacing 10% and 20% sand in cement mortar with only MIBA or only PET pellets could result in compressive strengths ranging from 46.00 MPa to 49.53 MPa.
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Affiliation(s)
- Lalitsuda Phutthimethakul
- International Program in Hazardous Substance and Environmental Management, Graduate School, Chulalongkorn University, Bangkok 10330, Thailand;
| | - Nuta Supakata
- Department of Environmental Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
- Research Group (STAR): Waste Utilization and Ecological Risk Assessment, The Ratchadaphiseksomphot Endowment Fund, Chulalongkorn University, Bangkok 10330, Thailand
- Correspondence:
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Anaerobic Digestate from Biogas Plants—Nuisance Waste or Valuable Product? APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12084052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Biogas production in waste-to-energy plants will support the decarbonization of the energy sector and enhance the EU’s energy transformation efforts. Digestates (DG) formed during the anaerobic digestion of organic wastes contain large amounts of nutrients. Their use for plant fertilization allows for diversifying and increasing the economic efficiency of farming activities. However, to avoid regional production surpluses, processing technologies allowing the acquisition of products that can be transported over long distances are required. This study therefore aimed at determining the effect of applied methods of DG treatment on the chemical composition of the resulting products and their effect on the yields and chemical composition of plants. The following digestate-based products (DGBPs) were tested: two different digestates (DGs), their liquid (LF) and solid fractions (SF) and pellets from DGs (PDG), and pellets form SFs (PSF). Results from the experiment show that during SF/LF separation of DGs, >80% of nitrogen and 87% of potassium flows to LFs, whereas >60% of phosphorus and 70% of magnesium flows to SFs. The highest yields were obtained using untreated DGs and LFs. The application of DGs and LFs was not associated with a leaching of nutrients to the environment (apparent nutrients recovery from these products exceeded 100%). Pelletized DG and SF forms can be used as slow-release fertilizer, although their production leads to significant nitrogen losses (>95%) by ammonia volatilization.
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Ali SS, Al-Tohamy R, Mohamed TM, Mahmoud YAG, Ruiz HA, Sun L, Sun J. Could termites be hiding a goldmine of obscure yet promising yeasts for energy crisis solutions based on aromatic wastes? A critical state-of-the-art review. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2022; 15:35. [PMID: 35379342 PMCID: PMC8981686 DOI: 10.1186/s13068-022-02131-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 03/13/2022] [Indexed: 12/26/2022]
Abstract
Biodiesel is a renewable fuel that can be produced from a range of organic and renewable feedstock including fresh or vegetable oils, animal fats, and oilseed plants. In recent years, the lignin-based aromatic wastes, such as various aromatic waste polymers from agriculture, or organic dye wastewater from textile industry, have attracted much attention in academia, which can be uniquely selected as a potential renewable feedstock for biodiesel product converted by yeast cell factory technology. This current investigation indicated that the highest percentage of lipid accumulation can be achieved as high as 47.25% by an oleaginous yeast strain, Meyerozyma caribbica SSA1654, isolated from a wood-feeding termite gut system, where its synthetic oil conversion ability can reach up to 0.08 (g/l/h) and the fatty acid composition in yeast cells represents over 95% of total fatty acids that are similar to that of vegetable oils. Clearly, the use of oleaginous yeasts, isolated from wood-feeding termites, for synthesizing lipids from aromatics is a clean, efficient, and competitive path to achieve "a sustainable development" towards biodiesel production. However, the lacking of potent oleaginous yeasts to transform lipids from various aromatics, and an unknown metabolic regulation mechanism presented in the natural oleaginous yeast cells are the fundamental challenge we have to face for a potential cell factory development. Under this scope, this review has proposed a novel concept and approach strategy in utilization of oleaginous yeasts as the cell factory to convert aromatic wastes to lipids as the substrate for biodiesel transformation. Therefore, screening robust oleaginous yeast strain(s) from wood-feeding termite gut system with a set of the desirable specific tolerance characteristics is essential. In addition, to reconstruct a desirable metabolic pathway/network to maximize the lipid transformation and accumulation rate from the aromatic wastes with the applications of various "omics" technologies or a synthetic biology approach, where the work agenda will also include to analyze the genome characteristics, to develop a new base mutation gene editing technology, as well as to clarify the influence of the insertion position of aromatic compounds and other biosynthetic pathways in the industrial chassis genome on the expressional level and genome stability. With these unique designs running with a set of the advanced biotech approaches, a novel metabolic pathway using robust oleaginous yeast developed as a cell factory concept can be potentially constructed, integrated and optimized, suggesting that the hypothesis we proposed in utilizing aromatic wastes as a feedstock towards biodiesel product is technically promising and potentially applicable in the near future.
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Affiliation(s)
- Sameh S. Ali
- School of the Environment and Safety Engineering, Biofuels Institute, Jiangsu University, Zhenjiang, 212013 China
- Botany Department, Faculty of Science, Tanta University, Tanta, 31527 Egypt
| | - Rania Al-Tohamy
- School of the Environment and Safety Engineering, Biofuels Institute, Jiangsu University, Zhenjiang, 212013 China
| | - Tarek M. Mohamed
- Biochemistry Division, Chemistry Department, Faculty of Science, Tanta University, Tanta, 31527 Egypt
| | | | - Héctor A. Ruiz
- Biorefinery Group, Food Research Department, School of Chemistry, Autonomous University of Coahuila, 25280 Saltillo, Coahuila Mexico
| | - Lushan Sun
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hong Kong, China
| | - Jianzhong Sun
- School of the Environment and Safety Engineering, Biofuels Institute, Jiangsu University, Zhenjiang, 212013 China
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Chen K, Wu D, Fei S, Pan C, Shen X, Zhang C, Hu J. Resistance of blended alkali-activated fly ash-OPC mortar to mild-concentration sulfuric and acetic acid attack. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:25694-25708. [PMID: 34845643 DOI: 10.1007/s11356-021-17555-7] [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: 09/29/2021] [Accepted: 11/12/2021] [Indexed: 06/13/2023]
Abstract
The traditional cementitious product is prone to suffer from a high degree of deterioration in the case of exposure to acid solutions because of the decomposition of the binder network. However, the degradation of concrete structures in service by mild concentrations of acid under conditions involving sewage, industrial waters, and acid rain is more common and results in a significant environmental problem. The utilization of alkali-activated materials has been seen to potentially offer an attractive option with regard to acceptable durability and a low carbon footprint. With the aid of visual observation, mass loss, compressive strength tests, X-ray diffraction, Fourier transform infrared spectroscopy, and field-emission scanning electron microscopy with energy-dispersive X-ray spectroscopy, the acid resistance of alkali-activated fly ash mortars in which the precursor was partially replaced (0-30% by mass proportion) with ordinary Portland cement (OPC) was evaluated after 180 days of exposure to mild-concentration sulfuric and acetic solutions (pH = 3). A conventional cement mortar (100% OPC) was used as a reference group. The results demonstrate that the addition of OPC into the alkali-activated system causes a significant increase in compressive strength (around 16.08-36.61%) while showing an opposite influence on durability after acid attack. Based on a linear mean value and nonlinear artificial neural network model simulation, the mass losses of the specimens were evaluated, and the alkali-activated pure-fly ash mortar demonstrated the lowest value (i.e., a maximum of 5.61%) together with the best behavior in the aspect of discreteness at 180 days. The results from microstructure analysis show that the coexistence of the N-A-S-H and C-S-H networks in the blend system occurred by both OPC hydration and FA. However, the formation of the gypsum deposition within the fly ash-OPC blend systems at sulfuric acid was found to impose internal disintegrating stresses, causing a significant area of delamination and cracks. In addition, alkali metal ion leaching, dealumination, as well as the disappearance of some crystalline phases occurred in specimens immersed in both types of acids.
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Affiliation(s)
- Keyu Chen
- School of Civil Engineering and Architecture, Zhejiang Sci-Tech University, Hangzhou, 300018, China
| | - Dazhi Wu
- School of Civil Engineering and Architecture, Zhejiang Sci-Tech University, Hangzhou, 300018, China.
| | - Sijia Fei
- Shanghai T&D Architectural Science and Technology Co. Ltd, Shanghai, 200092, China
| | - Chonggen Pan
- School of Civil Engineering and Architecture, Ningbo Tech University, Ningbo, 315100, China
| | - Xinyuan Shen
- School of Mathematical Information, Shaoxing University, Shaoxing, 312000, China
| | - Chaoxia Zhang
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou, 300018, China
| | - Juntao Hu
- School of Civil Engineering and Architecture, Zhejiang Sci-Tech University, Hangzhou, 300018, China
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26
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Zhang T, Wu X, Shaheen SM, Abdelrahman H, Ali EF, Bolan NS, Ok YS, Li G, Tsang DCW, Rinklebe J. Improving the humification and phosphorus flow during swine manure composting: A trial for enhancing the beneficial applications of hazardous biowastes. JOURNAL OF HAZARDOUS MATERIALS 2022; 425:127906. [PMID: 34891020 DOI: 10.1016/j.jhazmat.2021.127906] [Citation(s) in RCA: 42] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 11/14/2021] [Accepted: 11/22/2021] [Indexed: 06/13/2023]
Abstract
Improving the recovery of organic matter and phosphorus (P) from hazardous biowastes such as swine manure using acidic substrates (ASs) in conjunction with aerobic composting is of great interest. This work aimed to investigate the effects of ASs on the humification and/or P migration as well as on microbial succession during the swine manure composting, employing multivariate and multiscale approaches. Adding ASs, derived from wood vinegar and humic acid, increased the degree of humification and thermal stability of the compost. The 31P nuclear magnetic resonance spectroscopy and X-ray absorption near-edge structure analyses demonstrated compost P was in the form of struvite crystals, Ca/Al-P phases, and Poly-P (all inorganic P species) as well as inositol hexakisphosphate and Mono-P (organophosphorus species). However, the efficiency of P recovery could be improved by generating more struvite by adding the ASs. The flows among nutrient pools resulted from the diversity in the dominant microbial communities in different composting phases after introducing the ASs and appearance of Bacillus spp. in all phases. These results demonstrate the potential value of ASs for regulating and/or improving nutrients flow during the composting of hazardous biowastes for producing higher quality compost, which may maximize their beneficial benefits and applications.
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Affiliation(s)
- Tao Zhang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.
| | - Xiaosha Wu
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Sabry M Shaheen
- University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water, and Waste-Management, Laboratory of Soil, and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany; King Abdulaziz University, Faculty of Meteorology, Environment, and Arid Land Agriculture, Department of Arid Land Agriculture, 21589 Jeddah, Saudi Arabia; University of Kafrelsheikh, Faculty of Agriculture, Department of Soil and Water Sciences, 33516 Kafr El-Sheikh, Egypt.
| | - Hamada Abdelrahman
- Cairo University, Faculty of Agriculture, Soil Science Department, Giza 12613, Egypt
| | - Esmat F Ali
- Department of Biology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Nanthi S Bolan
- School of Agriculture and Environment, The University of Western Australia, Perth, WA 6001, Australia; The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6001, Australia
| | - Yong Sik Ok
- Korea Biochar Research Center, O-Jeong Eco-Resilience Institute (OJERI), Division of Environmental Science and Ecological Engineering, Korea University, Seoul, Republic of Korea
| | - Guoxue Li
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Jörg Rinklebe
- University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water, and Waste-Management, Laboratory of Soil, and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany; Department of Environment, Energy, and Geoinformatics, Sejong University, Seoul 05006, Republic of Korea.
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Huang Y, Zhao C, Gao B, Ma S, Zhong Q, Wang L, Cui S. Life cycle assessment and society willingness to pay indexes of food waste-to-energy strategies. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 305:114364. [PMID: 34959060 DOI: 10.1016/j.jenvman.2021.114364] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 12/16/2021] [Accepted: 12/18/2021] [Indexed: 06/14/2023]
Abstract
Food waste (FW) has received increasing attention because of its immense production quantities and significance to resource and environmental impacts related to disposal approaches. We combined life cycle assessment (LCA) with society's willingness to pay (WTP) index to evaluate energy, water, and environmental impacts on three food waste-to-energy (FWTE) options in China. For anaerobic digestion (AD) mode, the results showed that 1140 MJ of energy consumption could be saved by power generation from methane, power transmission, and biodiesel production from per ton of FW; the cost of climate change for treating FW was 137.8 kg CO2e t-1 FW, failing to be climate-sound due to the end life of digestate in practice. The total impact to AD mode in the form of monetized value for WTP was 13.3 CNY t-1 FW, of which the collection and transportation, pretreatment, AD reaction, wastewater treatment, biodiesel production, and residue landfilling stages contributed by 10.5%, 6.5%, 19.3%, 27.6%, 4.7%, and 75.7%, respectively, while biogas utilization offset it by 43.9%. Notably, a considerable amount of water used in AD prevented it from showing an advantage compared to incineration (-5.1 CNY t-1 FW), which performed best overall attributing to the generated electricity compensated for primary energy demand, water, and terrestrial acidification to a great extent. Landfilling turned out to be an unappealing FW disposal method due to the low landfill gas capture ratio. Given that AD is touted for its environmental benefits, potential approaches-such as developing a reliable and supportive technology to facilitate digestate recycling into agriculture-were discussed to improve its competitiveness and attractiveness. Our study employed a way to accumulate and compare impact indicators to better interpret FW management impacts and advantages, considering energy recovery, resource recycling, and the environment.
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Affiliation(s)
- Yunfeng Huang
- Department of Environmental Engineering, Jimei University, Xiamen, 361021, China
| | - Chuan Zhao
- Key Lab of Urban Environment and Health, Fujian Key Laboratory of Watershed Ecology, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; Graduate School of Environmental Studies, Tohoku University, Sendai, 980-8579, Japan.
| | - Bing Gao
- Key Lab of Urban Environment and Health, Fujian Key Laboratory of Watershed Ecology, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; Xiamen Key Lab of Urban Metabolism, Xiamen, 361021, China
| | - Shijun Ma
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Qiumeng Zhong
- Key Lab of Urban Environment and Health, Fujian Key Laboratory of Watershed Ecology, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Lan Wang
- Key Lab of Urban Environment and Health, Fujian Key Laboratory of Watershed Ecology, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shenghui Cui
- Key Lab of Urban Environment and Health, Fujian Key Laboratory of Watershed Ecology, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; Xiamen Key Lab of Urban Metabolism, Xiamen, 361021, China.
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Agnihotri S, Yin DM, Mahboubi A, Sapmaz T, Varjani S, Qiao W, Koseoglu-Imer DY, Taherzadeh MJ. A Glimpse of the World of Volatile Fatty Acids Production and Application: A review. Bioengineered 2022; 13:1249-1275. [PMID: 34738864 PMCID: PMC8805862 DOI: 10.1080/21655979.2021.1996044] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 10/16/2021] [Accepted: 10/16/2021] [Indexed: 11/18/2022] Open
Abstract
Sustainable provision of chemicals and materials is undoubtedly a defining factor in guaranteeing economic, environmental, and social stability of future societies. Among the most sought-after chemical building blocks are volatile fatty acids (VFAs). VFAs such as acetic, propionic, and butyric acids have numerous industrial applications supporting from food and pharmaceuticals industries to wastewater treatment. The fact that VFAs can be produced synthetically from petrochemical derivatives and also through biological routes, for example, anaerobic digestion of organic mixed waste highlights their provision flexibility and sustainability. In this regard, this review presents a detailed overview of the applications associated with petrochemically and biologically generated VFAs, individually or in mixture, in industrial and laboratory scale, conventional and novel applications.
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Affiliation(s)
- Swarnima Agnihotri
- Swedish Centre for Resource Recovery, University of Borås, Borås, Sweden
| | - Dong-Min Yin
- Institute of Urban and Rural Mining, Changzhou University, Changzhou, China
| | - Amir Mahboubi
- Swedish Centre for Resource Recovery, University of Borås, Borås, Sweden
| | - Tugba Sapmaz
- Swedish Centre for Resource Recovery, University of Borås, Borås, Sweden
- Department of Environmental Engineering, Istanbul Technical University, Maslak, Istanbul, Turkey
| | | | - Wei Qiao
- Institute of Urban and Rural Mining, Changzhou University, Changzhou, China
| | - Derya Y. Koseoglu-Imer
- Department of Environmental Engineering, Istanbul Technical University, Maslak, Istanbul, Turkey
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29
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Yuan T, Zhang Z, Lei Z, Shimizu K, Lee DJ. A review on biogas upgrading in anaerobic digestion systems treating organic solids and wastewaters via biogas recirculation. BIORESOURCE TECHNOLOGY 2022; 344:126412. [PMID: 34838626 DOI: 10.1016/j.biortech.2021.126412] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 11/17/2021] [Accepted: 11/19/2021] [Indexed: 06/13/2023]
Abstract
Biogas upgrading is an essential process for efficient and safe utilization of biogas produced from anaerobic digestion (AD), a cost-effective and environmentally friendly technology for bioenergy recovery from organic wastes. Biogas recirculation in AD reactors has been recently reported as a cost-effective and promising method to enhance methane content in biogas. This review aimed to summarize the state-of-the-art of biogas recirculation-based AD systems to better understand the possible mechanisms and main factors relating to in-situ biogas upgrading. It shows that biogas recirculation in the AD reactor can not only enhance methane content via both physicochemical and biological effects, but also help establish a robust AD system with high buffering capacity for highly efficient treatment of various organic wastes. More research works are demanding for a better understanding of the mechanisms and the optimization of the whole AD system, targeting its further development for high-calorie bioenergy production.
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Affiliation(s)
- Tian Yuan
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Zhenya Zhang
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Zhongfang Lei
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
| | - Kazuya Shimizu
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Duu-Jong Lee
- Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan; Department of Mechanical Engineering, City University of Hong Kong, Kowloon Tang, Hong Kong
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Smith SJ, Satchwell AJ, Kirchstetter TW, Scown CD. The implications of facility design and enabling policies on the economics of dry anaerobic digestion. WASTE MANAGEMENT (NEW YORK, N.Y.) 2021; 128:122-131. [PMID: 33989858 DOI: 10.1016/j.wasman.2021.04.048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 03/30/2021] [Accepted: 04/25/2021] [Indexed: 06/12/2023]
Abstract
Diverting organic waste from landfills provides significant emissions benefits in addition to preserving landfill capacity and creating value-added energy and compost products. Dry anaerobic digestion (AD) is particularly attractive for managing the organic fraction of municipal solid waste because of its high-solids composition and minimal water requirements. This study utilizes empirical data from operational facilities in California in order to explore the key drivers of dry AD facility profitability, impacts of market forces, and the efficacy of policy incentives. The study finds that dry AD facilities can achieve meaningful economies of scale with organic waste intake amounts larger than 75,000 tonnes per year. Materials handling costs, including the disposal of inorganic residuals from contaminated waste streams and post-digester mass (digestate) management, are both the largest and the most uncertain facility costs. Facilities that utilize the biogas for vehicle fueling and earn associated fuel credits collect revenues that are 4-6x greater than those of facilities generating and selling electricity and 10-12x greater than facilities selling natural gas at market prices. The results suggest important facility design elements and enabling policies to support an increased scale of organic waste handling infrastructure.
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Affiliation(s)
- Sarah Josephine Smith
- Energy Technologies Area, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, United States; Department of Civil and Environmental Engineering, University of California, Berkeley, Berkeley, CA 94720, United States.
| | - Andrew J Satchwell
- Energy Technologies Area, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, United States
| | - Thomas W Kirchstetter
- Energy Technologies Area, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, United States; Department of Civil and Environmental Engineering, University of California, Berkeley, Berkeley, CA 94720, United States
| | - Corinne D Scown
- Energy Technologies Area, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, United States; Biosciences Area, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, United States; Joint BioEnergy Institute, 5885 Hollis Street, Emeryville, CA 94720, United States
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31
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Ghimire U, Sarpong G, Gude VG. Transitioning Wastewater Treatment Plants toward Circular Economy and Energy Sustainability. ACS OMEGA 2021; 6:11794-11803. [PMID: 34056333 PMCID: PMC8154022 DOI: 10.1021/acsomega.0c05827] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 04/19/2021] [Indexed: 05/06/2023]
Abstract
Aging infrastructure, increasing environmental regulations, and receiving water environment issues stem the need for advanced wastewater treatment processes across the world. Advanced wastewater treatment systems treat wastewater beyond organic carbon removal and aim to remove nutrients and recover valuable products. While the removal of major nutrients (carbon, nitrogen, and phosphorus) is essential for environmental protection, this can only be achieved through energy-, chemical-, and cost-intensive processes in the industry today, which is an unsustainable trend, considering the global population growth and rapid urbanization. Two major routes for developing more sustainable and circular-economy-based wastewater treatment systems would be to (a) innovate and integrate energy- and resource-efficient anaerobic wastewater treatment systems and (b) enhance carbon capture to be diverted to energy recovery schemes. This Mini-Review provides a critical evaluation and perspective of two potential process routes that enable this transition. These process routes include a bioelectrochemical energy recovery scheme and codigestion of organic sludge for biogas generation in anaerobic digesters. From the analysis, it is imperative that integrating both concepts may even result in more energy- and resource-efficient wastewater treatment systems.
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32
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DelRe C, Jiang Y, Kang P, Kwon J, Hall A, Jayapurna I, Ruan Z, Ma L, Zolkin K, Li T, Scown CD, Ritchie RO, Russell TP, Xu T. Near-complete depolymerization of polyesters with nano-dispersed enzymes. Nature 2021; 592:558-563. [DOI: 10.1038/s41586-021-03408-3] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 03/01/2021] [Indexed: 02/08/2023]
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Chen T, Qiu X, Feng H, Yin J, Shen D. Solid digestate disposal strategies to reduce the environmental impact and energy consumption of food waste-based biogas systems. BIORESOURCE TECHNOLOGY 2021; 325:124706. [PMID: 33485081 DOI: 10.1016/j.biortech.2021.124706] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 01/06/2021] [Accepted: 01/08/2021] [Indexed: 06/12/2023]
Abstract
This study examined the environmental impacts and energy consumption of three solid digestate treatment scenarios to quantify their impacts on the entire food waste (FW)-based biogas system: (1) incineration; (2) composting, and; (3) landfill. The results showed that composting had the largest net energy consumption, but least total environmental impact of 57.3 kWh and 8.75 E-03, respectively, whereas landfill showed the opposite pattern. Moreover, there were significant differences (p < 0.05) and relatively high contributions between the digestate treatment subunits among the three scenarios. The most significant contributions of digestate subunits in methods 1-3 to the 100-year global warming potential (GWP100) were 70.5%, 52.5%, and 103.4%, respectively. The results indicated that solid digestate treatment had a significant impact, and reasonable disposal of solid digestate could significantly reduce the environmental impacts and energy consumption of the entire FW-based biogas system.
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Affiliation(s)
- Ting Chen
- School of Environment Science &Engineering, Zhejiang Gongshang University, Hangzhou 310012, China; Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, HangZhou 310012, China; Instrumental Analysis Center of Zhejiang Gongshang University, Hangzhou 310018, China.
| | - Xiaopeng Qiu
- Huadong Engineering Corporation Limited of Power China, Hangzhou 311122, China
| | - Huajun Feng
- School of Environment Science &Engineering, Zhejiang Gongshang University, Hangzhou 310012, China; Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, HangZhou 310012, China; Instrumental Analysis Center of Zhejiang Gongshang University, Hangzhou 310018, China
| | - Jun Yin
- School of Environment Science &Engineering, Zhejiang Gongshang University, Hangzhou 310012, China; Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, HangZhou 310012, China; Instrumental Analysis Center of Zhejiang Gongshang University, Hangzhou 310018, China
| | - Dongsheng Shen
- School of Environment Science &Engineering, Zhejiang Gongshang University, Hangzhou 310012, China; Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, HangZhou 310012, China; Instrumental Analysis Center of Zhejiang Gongshang University, Hangzhou 310018, China
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Pfadt-Trilling AR, Volk TA, Fortier MOP. Climate Change Impacts of Electricity Generated at a Waste-to-Energy Facility. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:1436-1445. [PMID: 33417433 DOI: 10.1021/acs.est.0c03477] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Waste-to-energy (WTE) facilities combust both biogenic and nonbiogenic materials comprising municipal solid waste (MSW) in addition to managing waste, leading to a lack of clarity on the life cycle climate change impact (LCCCI) as an electricity generator. In order to investigate the LCCCI of this resource, a cradle-to-gate life cycle assessment (LCA) of a WTE facility in Jamesville, NY, was performed utilizing system expansion to account for avoided landfilling emissions, additional metals recycling, and the loss of potential electricity generation from landfill gas. The LCCCI of electricity from this WTE facility ranges from 0.664 to 0.951 kg CO2eq/kWh before system expansion, which reduced the impact to -0.280 to 0.593 kg CO2eq/kWh when accounting for avoided waste management emissions. Combustion is the leading contributor of GHG emissions from cradle-to-gate, and sensitivity analysis indicates that the nonbiogenic fraction of the waste most significantly influences the LCCCI before including cobenefits. The fraction of methane from landfills that is not captured is the most influential variable under system expansion. Before system expansion, the LCCCI of this system is comparable to that of electricity from fossil fuels. With system expansion, the LCCCI ranges from below that of renewable energy to comparable to natural gas based electricity. These results disagree with claims in the reviewed literature that WTE can avoid GHG emissions overall, although avoided emissions reduce the magnitude of its impact.
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Affiliation(s)
- Alyssa R Pfadt-Trilling
- Division of Environmental Science, State University of New York College of Environmental Science and Forestry, 202 Baker Laboratory, One Forestry Drive, Syracuse, New York 13210, United States
| | - Timothy A Volk
- Department of Sustainable Resources Management, State University of New York College of Environmental Science and Forestry, 306 Bray Hall, One Forestry Drive, Syracuse, New York 13210, United States
| | - Marie-Odile P Fortier
- Department of Civil and Environmental Engineering, University of California - Merced, 5200 North Lake Road, Merced, California 95343, United States
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Preble CV, Chen SS, Hotchi T, Sohn MD, Maddalena RL, Russell ML, Brown NJ, Scown CD, Kirchstetter TW. Air Pollutant Emission Rates for Dry Anaerobic Digestion and Composting of Organic Municipal Solid Waste. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:16097-16107. [PMID: 33226230 DOI: 10.1021/acs.est.0c03953] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Dry anaerobic digestion (AD) of organic municipal solid waste (MSW) followed by composting of the residual digestate is a waste diversion strategy that generates biogas and soil amendment products. The AD-composting process avoids methane (CH4) emissions from landfilling, but emissions of other greenhouse gases, odorous/toxic species, and reactive compounds can affect net climate and air quality impacts. In situ measurements of key sources at two large-scale industrial facilities in California were conducted to quantify pollutant emission rates across the AD-composting process. These measurements established a strong relationship between flared biogas ammonia (NH3) content and emitted nitrogen oxides (NOx), indicating that fuel NOx formation is significant and dominates over the thermal or prompt NOx pathways when biogas NH3 concentration exceeds ∼200 ppm. Composting is the largest source of CH4, carbon dioxide (CO2), nitrous oxide (N2O), and carbon monoxide (CO) emissions (∼60-70%), and dominate NH3, hydrogen sulfide (H2S), and volatile organic compounds (VOC) emissions (>90%). The high CH4 contribution to CO2-equivalent emissions demonstrates that composting can be an important CH4 source, which could be reduced with improved aeration. Controlling greenhouse gas and toxic/odorous emissions from composting offers the greatest mitigation opportunities for reducing the climate and air quality impacts of the AD-composting process.
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Affiliation(s)
- Chelsea V Preble
- Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Civil and Environmental Engineering, University of California, Berkeley, California 94720, United States
| | - Sharon S Chen
- Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Toshifumi Hotchi
- Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Michael D Sohn
- Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Randy L Maddalena
- Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Marion L Russell
- Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Nancy J Brown
- Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Corinne D Scown
- Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Thomas W Kirchstetter
- Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Civil and Environmental Engineering, University of California, Berkeley, California 94720, United States
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Yang M, Baral NR, Anastasopoulou A, Breunig HM, Scown CD. Cost and Life-Cycle Greenhouse Gas Implications of Integrating Biogas Upgrading and Carbon Capture Technologies in Cellulosic Biorefineries. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:12810-12819. [PMID: 33030339 DOI: 10.1021/acs.est.0c02816] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Gaseous streams in biorefineries have been undervalued and underutilized. In cellulosic biorefineries, coproduced biogas is assumed to be combusted alongside lignin to generate process heat and electricity. Biogas can instead be upgraded to compressed biomethane and used as a transportation fuel. Capturing CO2-rich streams generated in biorefineries can also contribute to greenhouse gas (GHG) mitigation goals. We explore the economic and life-cycle GHG impacts of biogas upgrading and CO2 capture and storage (CCS) at ionic liquid-based cellulosic ethanol biorefineries using biomass sorghum. Without policy incentives, biorefineries with biogas upgrading systems can achieve a comparable minimum ethanol selling price (MESP) and reduced GHG footprint ($1.38/liter gasoline equivalent (LGE) and 12.9 gCO2e/MJ) relative to facilities that combust biogas onsite ($1.34/LGE and 24.3 gCO2e/MJ). Incorporating renewable identification number (RIN) values advantages facilities that upgrade biogas relative to other options (MESP of $0.72/LGE). Incorporating CCS increases the MESP but dramatically decreases the GHG footprint (-21.3 gCO2e/MJ for partial, -110.7 gCO2e/MJ for full CCS). The addition of CCS also decreases the cost of carbon mitigation to as low as $52-$78/t CO2, depending on the assumed fuel selling price, and is the lowest-cost option if both RIN and California's Low Carbon Fuel Standard credits are incorporated.
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Affiliation(s)
- Minliang Yang
- Life-cycle, Economics, and Agronomy Division, Joint BioEnergy Institute, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Nawa Raj Baral
- Life-cycle, Economics, and Agronomy Division, Joint BioEnergy Institute, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Aikaterini Anastasopoulou
- Energy Analysis and Environmental Impacts Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Hanna M Breunig
- Energy Analysis and Environmental Impacts Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Corinne D Scown
- Life-cycle, Economics, and Agronomy Division, Joint BioEnergy Institute, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Energy Analysis and Environmental Impacts Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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