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
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
Environmental Sciences
Morten Lykkegaard Christensen, Anne Hojmark Jakobsen, Cecilie Sofie Kragelund Hansen, Mads Skovbjerg, Rikke Bruun Munk Andersen, Mette Dam Jensen, Kim Sundmark
Summary: This article describes a wastewater treatment plant designed to focus equally on energy production, water quality, and reduced emissions of greenhouse gases. The plant utilizes a disk filter to remove carbon during primary treatment, followed by hydrolysis and centrifugation to produce a hydrolysate centrate that can be used for secondary wastewater treatment or biogas production.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
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
Agriculture, Multidisciplinary
Ruitao Lou, Yong Li, Ying Liu, Qianjing Jiang, Qingguan Wu, Yong He, Ji Liu
Summary: The combined application of green manure and inorganic fertilizer can increase CO2, CH4, and N2O emissions, as well as grain yield. The effects of this practice on greenhouse gas emissions and yield are influenced by initial soil conditions, green manure application methods, and timing. Green manure substitutes for inorganic fertilizer can increase GWP and yield in areas with high initial soil pH and low C:N ratios.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2024)
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
Thomas N. Bwana, Nyambilila A. Amuri, Ernest Semu, Lars Elsgaard, Klaus Butterbach-Bahl, David E. Pelster, Jorgen Eivind Olesen
Summary: This study compared N2O emissions from organic and conventional cotton farming practices in different seasons, finding variations in emissions levels. High input conventional cotton showed slightly higher N2O emissions than organic cotton in wet season, but no significant difference in dry season. The combination of organic and inorganic fertilizers, cotton-legume intercropping did not have a significant impact on N2O emissions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Green & Sustainable Science & Technology
Alun Scott, Richard Blanchard
Summary: This study reveals that despite significant success in capturing CH4 and carbon dioxide as biogas and preventing N2O emissions, gains made can be lost in a subsequent process, negating some or all of the advantage. Additionally, the process of extracting value from the captured resource is discussed in light of current farm parameters together with indications of other potential revenue streams.
Article
Multidisciplinary Sciences
Yueyue Si, Yizhu Zhu, Ian Sanders, Dorothee B. Kinkel, Kevin J. Purdy, Mark Trimmer
Summary: This study found that freshwater communities are capable of fixing both N-2 and N2O, with different seasonalities and temperature dependencies. N2O fixation is less sensitive to temperature compared to N-2 fixation, resulting in a strong sink for N2O in colder months.
NATURE COMMUNICATIONS
(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
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
Sakae Toyoda, Takahito Kakimoto, Kushi Kudo, Naohiro Yoshida, Daisuke Sasano, Naohiro Kosugi, Masao Ishii, Sohiko Kameyama, Mahomi Inagawa, Hisayuki Yoshikawa-Inoue, Shigeto Nishino, Akihiko Murata, Shigeyuki Ishidoya, Shinji Morimoto
Summary: Ocean-atmosphere gas exchange in the Arctic Ocean is sensitive to global warming because the decrease of sea-ice covered area enhances the exchange. The isotopic signatures of dissolved N2O in the Chukchi Sea shelf indicate a mixture of N2O produced in the bottom water and that of atmospheric origin.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Review
Environmental Sciences
Khushboo Gupta, Raushan Kumar, Kushal Kumar Baruah, Samarendra Hazarika, Susmita Karmakar, Nirmali Bordoloi
Summary: Agricultural soil, especially rice paddies, play a significant role in emitting greenhouse gases such as methane and nitrous oxide. Understanding the mechanisms and factors influencing the production and release of these gases is crucial in developing strategies to reduce emissions and mitigate global climate change impacts.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Jeong gu Lee, Ho Gyeong Chae, Gil Won Kim, Pil Joo Kim, Song Rae Cho
Summary: Plastic film mulching can significantly increase crop productivity and net primary production, but it also leads to an increase in greenhouse gas emissions, resulting in a higher net global warming potential. Additionally, mulching can decrease soil carbon stock and increase carbon loss, but this negative impact can be alleviated with higher levels of biomass addition.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Chuan Zhong, Ying Liu, Xintong Xu, Binjuan Yang, Muhammad Aamer, Peng Zhang, Guoqin Huang
Summary: The study found that the Chinese milk vetch-rice-sweet potato parallel to soybean cropping system significantly reduces CH4 emissions but increases N2O emissions. Paddy-upland rotation decreases soil CH4 emissions but increases N2O emissions. The interaction between Chinese milk vetch incorporation and paddy-upland rotation enhances N2O emissions and soil nitrate content.
ENVIRONMENTAL POLLUTION
(2021)
