Article
Green & Sustainable Science & Technology
Yanying He, Yiming Li, Xuecheng Li, Yingrui Liu, Yufen Wang, Haixiao Guo, Jiaqi Hou, Tingting Zhu, Yiwen Liu
Summary: This paper comprehensively reviews the status of greenhouse gas (GHG) production and emission in wastewater treatment. It reveals that nitrous oxide (N2O) emission contributes significantly to the total GHG emissions, and emphasizes the importance of dissolved N2O and methane (CH4) in effluent for further GHG mitigation. Alternative integration systems, such as coupling denitrifying anaerobic methane oxidation with anammox process, are discussed as promising approaches for GHG mitigation. Moreover, strategies to manage N2O and CH4 as energy sources are demonstrated for offsetting carbon footprint in wastewater treatment and achieving net-zero GHG emission.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Environmental Sciences
Durba Kashyap, Marion de Vries, Annette Pronk, Witono Adiyoga
Summary: This study aimed to quantify the environmental impacts of Indonesian vegetable production and the relative contribution of different farm inputs. Results showed that organic fertilizer use contributed the most to impact categories of global warming, freshwater eutrophication, and acidification, indicating the importance of including organic fertilizer use in vegetable production in Indonesia.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
C. Scheutz, Z. Duan, J. Moller, P. Kjeldsen
Summary: A life cycle-based environmental assessment was conducted to evaluate the mitigation of landfill gas emissions using biocover and gas collection with energy utilisation at aging landfills. The study found that biocover and gas collection systems with energy utilisation led to significant environmental improvements compared to the baseline scenario with no emission mitigation action. Scenarios representing biocovers with higher methane oxidation efficiencies were environmentally superior in terms of climate change impact compared to scenarios with longer gas collection and energy utilisation. Combining gas collection with energy utilisation and the subsequent installation of a biocover provided major improvements compared to scenarios with only gas collection and energy utilisation. It was concluded that a biocover, under the given assumptions, is more environmentally appropriate than gas collection and utilisation at aging landfills due to methane emissions escaping through the landfill cover.
Article
Environmental Sciences
Vanessa Parravicini, Per Henrik Nielsen, Dines Thornberg, Alberto Pistocchi
Summary: We present an assessment of greenhouse gas emissions from urban wastewater treatment plants in Europe, and propose solutions to reduce these emissions. Our assessment considers various factors that contribute to emissions, such as infrastructure, sewer networks, treatment processes, and the composition of treated effluents.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Desy Safitri, Fahrurrozi, Arita Marini, Leola Dewiyani, Siti Gomo Attas
Summary: While ASEAN economies are facing worsening environmental conditions, shifting toward green investment to increase renewable energy production has been identified as an effective solution. This study examines the role of environmental degradation and green investment on renewable energy production in ASEAN economies. The empirical evidence reveals that environmental degradation can lead to increased renewable energy production, and green investment has a positive impact on renewable energy production, highlighting the importance of clean energy investments in mitigating environmental challenges.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Jamshid Ansari, Morgan P. Davis, Stephen H. Anderson, Frieda Eivazi, Sougata Bardhan
Summary: Land management practices and cropping strategies have a significant impact on greenhouse gas emissions from soil gas flux. This study evaluated the effects of different land use types on soil greenhouse gas emissions in the Missouri River floodplain. The results showed variations in soil GHG emissions among different land use systems, and fertilizer application and soil saturation were identified as key drivers.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Environmental Sciences
Wangshou Zhang, Hengpeng Li, Steven G. Pueppke, Jiaping Pang
Summary: This study investigated the concentrations of N2O and CH4 in a headwater stream in the Taihu Lake basin of China, revealing that the saturation levels of CH4 in wetland reaches were seven times higher than those in non-wetland reaches, with peaks in July coinciding with a decrease in N2O saturation. Diurnal measurements showed that CH4 saturation in water passing through wetlands can surge to levels 10 times higher than at other times, while N2O saturation decreases by 75%. These findings highlight the potential hotspots of CH4 production and N2O consumption in riverine wetlands.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
J. Webb, T. J. van der Weerden, M. Hassouna, B. Amon
Summary: Emissions of ammonia, nitrous oxide, and methane from livestock production are measured and reported in various units, complicating the compilation of national inventories. This study provides guidance for researchers to convert emission units into emission factors and increase the use of published data. The developed methodology greatly increased the number of required emission factors and showed good correlations between estimated and reported emissions for certain subsets of emissions.
Article
Agriculture, Multidisciplinary
Weishou Shen, Dong Qian, Ruonan Xiong, Zijian Qiu, Adharsh Rajasekar
Summary: Land use intensification has a significant impact on greenhouse gas emissions in the Taihu Lake region, reducing methane emissions and increasing nitrous oxide emissions.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2022)
Article
Environmental Sciences
Wei Chen, Qian Zhang, Lulu Hu, Yong Geng, Chengqing Liu
Summary: This study estimated greenhouse gas (GHG) emissions from wastewater treatment plants (WWTPs) at the country scale using a life cycle assessment method. The results showed that the GHG emissions varied among different WWTPs, with a national average of 0.88 kg CO2 eq/m3. Policy suggestions, such as adjusting the electricity grid and improving treatment efficiency, were recommended to reduce GHG emissions.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Agronomy
Qiurui Zhu, Eric A. Davidson, Jacob G. Hagedorn, Mark S. Castro, Thomas R. Fisher, Rebecca J. Fox, Shannon E. Brown, James W. Lewis
Summary: Drainage water management (DWM) is an effective practice to reduce nitrate export from croplands, but it may increase greenhouse gas emissions. This study evaluated the effects of DWM on greenhouse gas emissions and found no significant difference in emissions between DWM and non-DWM fields.
AGRICULTURAL AND FOREST METEOROLOGY
(2023)
Article
Engineering, Environmental
Nicholas E. Ray, Robinson W. Fulweiler
Summary: In oyster habitats, the sediments show peak carbon dioxide production in spring and summer, as well as consistent methane release into the water column, while nitrous oxide is generally absorbed with occasional release in spring. The overall impact of oysters on sediment greenhouse gas cycling in temperate regions is considered negligible.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Biodiversity Conservation
Huanhuan Wei, Xiaotong Song, Yan Liu, Rui Wang, Xunhua Zheng, Klaus Butterbach-Bahl, Rodney T. Venterea, Di Wu, Xiaotang Ju
Summary: Oxygen dynamics play a key role in controlling nitrous oxide (N2O) production processes in arable soils. Bacterial denitrification is the primary source of N2O emissions during the hot-wet summer, while nitrification or fungal denitrification contribute to about 50.0% of total emissions during the cold-dry winter. The findings help improve process models and develop targeted mitigation measures for N2O emissions.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Engineering, Environmental
Edward J. H. van Dijk, Mark C. M. van Loosdrecht, Mario Pronk
Summary: The study found that the average emission factor of nitrous oxides is influenced by factors such as season, temperature, and rainfall, and different process controls may be necessary at different temperatures to ensure consistent low emissions.
Article
Environmental Sciences
Meiling Liu, Chunjing Liu, Wenhua Liao, Jianzhi Xie, Xinxing Zhang, Zhiling Gao
Summary: This study investigated the impacts of different alkaline biochars (from walnut shell, coconut shell, and coal) on gas emissions from liquid pig manure. The results showed that the application of biochars significantly increased NH3 and CH4 emissions, with the absorbed N content of the biochars lower than the enhanced gaseous losses through NH3 emissions. The total greenhouse gas emissions were also higher with biochar application, mainly due to enhanced CH4 emissions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
K. Kissas, A. Ibrom, P. Kjeldsen, C. Scheutz
Summary: This study investigates the temporal variability of methane emissions from an old landfill in Denmark, caused by changes in barometric pressure. Two different quantification techniques were used simultaneously and their results were compared. The study found significant spatial and temporal variations in methane emissions, influenced by changes in barometric pressure and wind speed. The study also identified seasonal variations in emissions, but no diurnal variability was observed.
Article
Engineering, Environmental
Zhenhan Duan, Peter Kjeldsen, Charlotte Scheutz
Summary: Landfills are a significant source of anthropogenic methane emissions globally. This paper examines the gas collection efficiencies of 23 Danish landfills and proposes using these values to regulate methane emissions in Denmark. The study finds that the gas collection efficiency in Danish landfills is lower than in Swedish, UK and US landfills, potentially due to factors such as shallow gas collection pipes, leakage from installations, and low gas production. It suggests using gas collection efficiency as a regulatory tool to achieve methane mitigation goals in landfills.
Article
Engineering, Environmental
C. Scheutz, A. Kjeld, A. M. Fredenslund
Summary: This study compares methane emissions from five Icelandic landfills and finds that the application of the IPCC FOD model for estimating landfill methane emissions in Iceland is appropriate.
Article
Agriculture, Multidisciplinary
Nathalia T. Vechi, Johan Mellqvist, Charlotte Scheutz
Summary: In Denmark, agriculture, particularly cattle farming, is the largest contributor to anthropogenic methane emissions. Methane emissions were measured at nine Danish cattle farms and found to be highest at locations with the highest number of animals. Results showed that current inventory models underestimate methane emissions, suggesting a need for improvements, especially in estimating emissions from beef cattle and manure management.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2022)
Article
Engineering, Environmental
K. Kissas, A. Ibrom, P. Kjeldsen, C. Scheutz
Summary: An empirical model was developed to estimate annual methane emissions from Danish landfills. The model accurately predicts short-term emission variability and addresses temporal variability caused by barometric pressure. The results show that emissions vary between different landfills and propose an optimized sampling strategy.
Article
Agronomy
Marlies Hrad, Marion Huber-Humer, Torsten Reinelt, Bernhard Spangl, Claudia Flandorfer, Fabrizio Innocenti, Johan Yngvesson, Anders Fredenslund, Charlotte Scheutz
Summary: This study compared and validated the quantification of methane emissions using different methods at agricultural biogas plants. The results showed that on-site methods underestimated overall emissions, while off-site methods were more accurate. The study also highlighted the comparability of the methods between different plants.
AGRICULTURAL AND FOREST METEOROLOGY
(2022)
Article
Environmental Sciences
N. T. Vechi, J. Mellqvist, J. Samuelsson, B. Offerle, C. Scheutz
Summary: Dairy CAFOs in the San Joaquin Valley, California are significant sources of methane and ammonia emissions. Optical techniques using SOF and MeFTIR were employed to measure NH3 and CH4 concentrations. The NH3 emission rates were 101.9 +/- 40.6 kgNH3/h and CH4 emission rates were 437.7 +/- 202.0 kgCH4/h. NH3 emissions showed a diurnal pattern with lower nighttime emissions. Measured NH3 and CH4 emissions were higher than reported rates, but similar to airborne measurements. These new measurement methods provide high-resolution quantification of emissions over large areas.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Environmental Sciences
Nathalia T. Vechi, Nina S. Jensen, Charlotte Scheutz
Summary: This study investigated methane emissions from different pig farms in Denmark and compared them with inventory emission models. The results showed that manure management practices and pig types have an impact on methane emissions, and the inventory models underestimated the actual measurements.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
K. Kissas, P. Kjeldsen, A. Ibrom, C. Scheutz
Summary: This study examined the performance of a passive biocover system at a Danish landfill. The effectiveness of the system was assessed by comparing methane emissions before and after biocover installation. It was found that the performance of the biocover system was influenced by barometric pressure changes, with higher oxidation efficiency achieved under increasing pressure.
Article
Engineering, Environmental
Anders Michael Fredenslund, Einar Gudmundsson, Julie Maria Falk, Charlotte Scheutz
Summary: This study involved 69 biogas plants in Denmark, which represented 59% of the country's biogas production, in an effort to reduce methane emissions. Various measurements and assessments were conducted to determine emission rates, sources, and potential mitigation strategies. The findings showed variations in emission rates and losses between different types of plants, with pressure relief valves being a commonly observed source of leakage. The study also determined a national emission factor for Danish biogas production and demonstrated the effectiveness of mitigating actions in reducing emissions.
Article
Engineering, Environmental
Viktoria Wechselberger, Torsten Reinelt, Johan Yngvesson, Deborah Scharfy, Charlotte Scheutz, Marion Huber-Humer, Marlies Hrad
Summary: This study investigates the methane (CH4) emissions from various biogas plant technologies in Austria, Germany, Sweden, and Switzerland. The results provide emission factors (EFs) for different components of biogas plants, helping to estimate emissions more accurately and identify low emission technologies.
Article
Engineering, Environmental
C. Scheutz, Z. Duan, J. Moller, P. Kjeldsen
Summary: A life cycle-based environmental assessment was conducted to evaluate the mitigation of landfill gas emissions using biocover and gas collection with energy utilisation at aging landfills. The study found that biocover and gas collection systems with energy utilisation led to significant environmental improvements compared to the baseline scenario with no emission mitigation action. Scenarios representing biocovers with higher methane oxidation efficiencies were environmentally superior in terms of climate change impact compared to scenarios with longer gas collection and energy utilisation. Combining gas collection with energy utilisation and the subsequent installation of a biocover provided major improvements compared to scenarios with only gas collection and energy utilisation. It was concluded that a biocover, under the given assumptions, is more environmentally appropriate than gas collection and utilisation at aging landfills due to methane emissions escaping through the landfill cover.
Article
Agricultural Engineering
Nathalia T. Vechi, Charlotte Scheutz
Summary: This study developed a new approach, the stationary tracer dispersion method (STDM), to measure methane emissions from farm-scale manure storage tanks. The method was validated through controlled gas release experiments and showed a relatively stable methane recovery rate. The study also found a strong correlation between methane emissions and atmospheric and manure temperatures.
BIOSYSTEMS ENGINEERING
(2023)
Article
Environmental Sciences
Antonio Delre, Arjan Hensen, Ilona Velzeboer, Pim van den Bulk, Maklawe Essonanawe Edjabou, Charlotte Scheutz
Summary: This study quantified the site-specific methane and ethane emission rates from the onshore oil and gas sector in Romania using the mobile tracer gas dispersion method. The results showed that the emission rates varied among different sites and regions, with methane emissions being negatively correlated to wastewater production and ethane emissions being relatively low compared to literature values.
ELEMENTA-SCIENCE OF THE ANTHROPOCENE
(2022)
Article
Green & Sustainable Science & Technology
Lars odegaard Bentsen, Narada Dilp Warakagoda, Roy Stenbro, Paal Engelstad
Summary: This study investigates uncertainty modeling in wind power forecasting using different parametric and non-parametric methods. Johnson's SU distribution is found to outperform Gaussian distributions in predicting wind power. This research contributes to the literature by introducing Johnson's SU distribution as a candidate for probabilistic wind forecasting.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Xing Liu, Qiuchen Wang, Yunhao Wen, Long Li, Xinfang Zhang, Yi Wang
Summary: This study analyzes the characteristics of process parameters in three lean gas ethane recovery processes and establishes a prediction and multiobjective optimization model for ethane recovery and system energy consumption. A new method for comparing ethane recovery processes for lean gas is proposed, and the addition of extra coolers improves the ethane recovery. The support vector regression model based on grey wolf optimization demonstrates the highest prediction accuracy, and the multiobjective multiverse optimization algorithm shows the best optimization performance and diversity in the solutions.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Cairong Song, Haidong Yang, Xian-Bing Meng, Pan Yang, Jianyang Cai, Hao Bao, Kangkang Xu
Summary: The paper proposes a novel deep learning-based prediction framework, aTCN-LSTM, for accurate cooling load predictions. The framework utilizes a gate-controlled multi-head temporal convolutional network and a sparse probabilistic self-attention mechanism with a bidirectional long short-term memory network to capture both temporal and long-term dependencies in the cooling load sequences. Experimental results demonstrate the effectiveness and superiority of the proposed method, which can serve as an effective guide for HVAC chiller scheduling and demand management initiatives.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Zhe Chen, Xiaojing Li, Xianli Xia, Jizhou Zhang
Summary: This study uses survey data from the Loess Plateau in China to evaluate the impact of social interaction on the adoption of soil and water conservation (SWC) technology by farmers. The study finds that social interaction increases the likelihood of farmers adopting SWC, and internet use moderates this effect. The positive impact of social interaction on SWC adoption is more pronounced for farmers in larger villages and those who join cooperative societies.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Chenghua Zhang, Yunfei Yan, Kaiming Shen, Zongguo Xue, Jingxiang You, Yonghong Wu, Ziqiang He
Summary: This paper reports a novel method that significantly improves combustion performance, including heat transfer enhancement under steady-state conditions and adaptive stable flame regulation under velocity sudden increase.
JOURNAL OF CLEANER PRODUCTION
(2024)
