Article
Agricultural Engineering
Yuxiang Zhao, Yicheng Lou, Weizhen Qin, Jingjie Cai, Pan Zhang, Baolan Hu
Summary: The study shows that interval aeration strategy (20 min aeration, 10 min pause) can increase the degradation rate and humus content of food waste composting by regulating microbial interactions.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Vania Scarlet Chavez-Rico, Paul L. E. Bodelier, Miriam van Eekert, Valentina Sechi, Adrie Veeken, Cees Buisman
Summary: This study compares the effects of different organic amendment production technologies on the preservation of carbon and nutrients. The results show that under reducing production conditions, fermentation and digestion methods preserve a higher percentage of carbon and nitrogen compared to composting, and the concentration of nutrients in the water-soluble phase is higher in digestate.
Article
Agronomy
Said Elshahat Abdallah, Yasser S. A. Mazrou, Tamer Elsakhawy, Reda Elgarhy, Adel H. Elmetwalli, Salah Elsayed, Wael M. Elmessery
Summary: This study assessed the impact of active and passive aeration on the composting mass of sugar beet residues, with the use of additives improving compost quality. Forced aeration showed better results in terms of temperature, carbon to nitrogen ratio, and electrical conductivity. Forcedly aerated compost treated with a combination of charcoal and manure achieved the highest germination index, showing a strong correlation with bacterial population on day 17 of the composting period.
Article
Environmental Sciences
Sara Bottausci, Chiara Magrini, Giulia Adele Tuci, Alessandra Bonoli
Summary: This study examines the impact of plastic impurities on the environmental and economic performance of an Italian composting plant. It includes a material flow analysis to quantify impurities before and after composting, as well as a life cycle assessment and costing of the composting process. Results show that conventional plastic remains constant, while compostable plastic almost disappears after composting. Shredding and mixing phases are identified as the most environmentally damaging, and operating costs contribute the most to total annual costs. The study suggests potential improvements by addressing plastic impurities in biowaste.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Agricultural Engineering
Yu-Hong Huang, Xiao-Hong Chen, Qi-Fang Li, Huixiong Lu, Ce-Hui Mo, Nai-Xian Feng, Lei Xiang, Hai-Ming Zhao, Hui Li, Yan-Wen Li, Quan-Ying Cai
Summary: This study reveals the dynamic changes of fungal community during hyperthermophilic composting and the significant effects of heavy metals on fungal community structure and functions. Some thermophilic and heavy metal-resistant fungi play important roles in the decomposition and humification of municipal sludge.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Ting Xie, Zhaohan Zhang, Yanling Yu, Yan Tian, Fei Wang, Dongyi Li, Jun Nan, Yujie Feng
Summary: This study investigated the mechanisms of aeration intensity on humification during kitchen waste composting. The results showed that moderate aeration intensity improved the humification index and the ratio of humic acid to fulvic acid. Environmental factors and humus-like substances were identified as critical factors for improving humification levels. Moderate aeration intensity also reduced potentially pathogenic bacteria and promoted organic matter decomposition and humic acid formation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Agricultural Engineering
Jingwen Cheng, Xingzu Gao, Zhaowei Yan, Guoxue Li, Wenhai Luo, Zhicheng Xu
Summary: This study investigated the performance and mechanisms of intermittent aeration in regulating gaseous emission and humification during food waste digestate composting. Results showed that intermittent aeration regimes reduced gaseous emission and enhanced humification. Intermittent aeration with the on/off ratio of 1:1 was the most effective in reducing organic mineralization and alleviating the emission of nitrous oxide and ammonia.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Maojiong Cao, Hugang Li, Xiao Zhao, Zhidan Liu
Summary: This study investigated the characteristics of arsenic in a hydrothermal liquefaction system with arsenic-containing algae at different pH values. The results showed that a portion of arsenic was immobilized in the solid residue, while the majority of it dissolved in the aqueous phase. Analysis revealed a conversion of arsenic forms in the solid residue, and pH regulators influenced the levels of unstable forms in the residue. The addition of acidic and alkaline additives also affected the hydrolysis products of amide.
Article
Agricultural Engineering
Zhicheng Xu, Chuanren Qi, Lanxia Zhang, Yu Ma, Jungang Li, Guoxue Li, Wenhai Luo
Summary: Increasing aeration intensity during kitchen waste composting can inhibit fermentation, promote the production of humus precursors and ammonia, but limit humification.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Lanxia Zhang, Xingzu Gao, Tong Shi, Zhicheng Xu, Guoxue Li, Wenhai Luo
Summary: This study investigated the impact of aeration intensity on food waste digestate composting and found that increasing aeration intensity enhanced organic consumption and temperature increase, but hindered organic humification and substrate maturity. It also showed that higher aeration intensity reduced methane emission and increased hydrogen sulphide production, while limiting nitrite/nitrogen respiration and promoting nitrous oxide and ammonia emission. The results indicated that a low aeration intensity improved food waste digestate composting by promoting humus synthesis and mitigating gaseous emissions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Energy & Fuels
Beibei Yan, Yuechi Che, Xutong Wang, Yingxiu Zhang, Jian Li, Zeng Dan, Keke Chang
Summary: This study investigates the feasibility of applying composting to Tibet and establishes a water-waste-nutrient nexus model to evaluate its environmental impacts and economic value. The experimental and modeling results both suggest that composting can effectively reduce the use of chemical fertilizers and increase economic benefits.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Engineering, Mechanical
Che Zhan, A. Saint-Jalmes, M. Receveur, H. El Bahi, F. Rondelez, V Leroy
Summary: This article discusses the aeration issue in lubricating oils and emphasizes the importance of using deaerating agents. By incorporating ultrasonic probes into the experiments, the authors are able to measure both the gas volume fraction and bubble size during the aeration process. This measuring technique provides new insights into the dynamics of aeration and de-aeration.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Geosciences, Multidisciplinary
Renshan Li, Qingpeng Yang, Xin Guan, Longchi Chen, Qingkui Wang, Silong Wang, Weidong Zhang
Summary: The influence of litter quality and soil mesofauna on litter decomposition was studied in a subtropical forest ecosystem. It was found that higher quality litter decomposed faster in the early stage and had a larger fraction of stable residue remaining in the late stage. Soil mesofauna exclusion had no effect on the early decomposition rate but significantly increased the stable residue remaining.
Article
Biochemistry & Molecular Biology
Maria Gorczyca, Jan Kazmierczak, Patrick Fickers, Ewelina Celinska
Summary: Overproduction of recombinant secretory proteins triggers changes in producer cell physiology, and exposure to suboptimal growth conditions may increase this response. Studying the effects of different environmental stresses on protein synthesis and host cell physiology can improve understanding of fundamental biological processes and provide clues for optimizing bioprocesses.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Agriculture, Multidisciplinary
K. Ekinci, I. Tosun, K. Suluk, F. Sevik, B. Salih Kumbul, N. Berk Bitrak
Summary: This study investigated the effects of aeration pattern employing forced aeration on various physical and chemical properties and energy consumption by aeration in composting piles consisting of rose oil processing solid wastes, separated dairy and poultry manure, and straw as bulking agents. The results showed that operating the composting process with a longer fan on-time (Pile-3) can reduce energy consumption by 12.55% (0.913 kWh/OML) compared to the shorter fan on-time (Pile-1). The study concluded that operating the composting process with a longer fan on-time is economically convenient within acceptable limits.
JOURNAL OF AGRICULTURAL SCIENCE AND TECHNOLOGY
(2023)
Article
Agriculture, Multidisciplinary
Kajsa Henryson, Cecilia Sundberg, Thomas Katterer, Per-Anders Hansson
AGRICULTURAL SYSTEMS
(2018)
Article
Agricultural Engineering
Torun Hammar, Johan Stendahl, Cecilia Sundberg, Hampus Holmstrom, Per-Anders Hansson
BIOMASS & BIOENERGY
(2019)
Article
Chemistry, Multidisciplinary
James K. Gitau, Jane Mutune, Cecilia Sundberg, Ruth Mendum, Mary Njenga
APPLIED SCIENCES-BASEL
(2019)
Article
Engineering, Environmental
Elias S. Azzi, Erik Karltun, Cecilia Sundberg
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2019)
Article
Soil Science
Kajsa Henryson, Er-Anders Hansson, Thomas Katterer, Pernilla Tidaker, Cecilia Sundberg
NUTRIENT CYCLING IN AGROECOSYSTEMS
(2019)
Article
Energy & Fuels
James K. Gitau, Cecilia Sundberg, Ruth Mendum, Jane Mutune, Mary Njenga
Article
Green & Sustainable Science & Technology
Asterios Papageorgiou, Rajib Sinha, Bjorn Frostell, Cecilia Sundberg
JOURNAL OF INDUSTRIAL ECOLOGY
(2020)
Article
Green & Sustainable Science & Technology
K. J. Gitau, J. Mutune, C. Sundberg, R. Mendum, M. Njenga
ENERGY FOR SUSTAINABLE DEVELOPMENT
(2019)
Article
Green & Sustainable Science & Technology
Evgheni Ermolaev, Cecilia Sundberg, Mikael Pell, Sven Smars, Hakan Jonsson
JOURNAL OF CLEANER PRODUCTION
(2019)
Article
Energy & Fuels
Asterios Papageorgiou, Archana Ashok, Tabassom Hashemi Farzad, Cecilia Sundberg
Article
Environmental Sciences
Kajsa Henryson, Thomas Katterer, Pernilla Tidaker, Cecilia Sundberg
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Environmental Sciences
Cecilia Sundberg, Erik Karltun, James K. Gitau, Thomas Katterer, Geoffrey M. Kimutai, Yahia Mahmoud, Mary Njenga, Gert Nyberg, Kristina Roing de Nowina, Dries Roobroeck, Petra Sieber
MITIGATION AND ADAPTATION STRATEGIES FOR GLOBAL CHANGE
(2020)
Article
Engineering, Environmental
Shivesh Kishore Karan, Fabian Osslund, Elias Sebastian Azzi, Erik Karltun, Cecilia Sundberg
Summary: This study provides a flexible multicriteria framework that delivers spatial indications on biochar prioritization through a biochar use indication map (BUIM). The results show that a significant fraction of Swedish arable land could potentially benefit from biochar application, and biochar application schemes can be adjusted to various objectives and local needs.
RESOURCES CONSERVATION AND RECYCLING
(2023)
Article
Agronomy
Shivesh Kishore Karan, Dominic Woolf, Elias Sebastian Azzi, Cecilia Sundberg, Stephen A. Wood
Summary: Global warming requires urgent action to reduce and remove carbon dioxide emissions. Biochar, produced from crop residues, offers a promising solution for climate change mitigation. Using a high spatial resolution global dataset, it is found that crop residues generate approximately 2.4 Pg C annually. Taking into account limitations on residue harvesting and livestock usage, the global biochar production potential decreases to 0.51 Pg C/year. Twelve countries have the potential to sequester over one fifth of their current emissions through biochar production.
GLOBAL CHANGE BIOLOGY BIOENERGY
(2023)
Article
Environmental Sciences
Elias S. Azzi, Erik Karltun, Cecilia Sundberg
Summary: This study conducted life cycle assessments of five biochar products and estimated the demand for biochar in a new city district in Uppsala, Sweden. The results showed that in a decarbonised energy system, most biochar products had better climate performance compared to reference products and had potential benefits for reducing CO2 emissions in steel production. However, there were trade-offs between different sectors and impact categories in terms of other environmental impacts. The study also raised questions about the end-of-life management of biochar-containing products.
Article
Engineering, Environmental
Xiaojian Liu, Bei Wang, Yayun Ma, Xiangyang Zhou, Juan Yang, Yuehui He, Jingjing Tang, Fanyun Su, Wan Yang
Summary: This study proposes a combined process of reduction roasting of herb-medicine residue and oxalic acid leaching to improve the recovery efficiency of lithium from spent lithium-ion batteries. By utilizing the reducing gas produced from the pyrolysis of herb-medicine residue, the layered structure of the cathode powder is destroyed and converted into Li2CO3, Ni, Co, and MnO. Additionally, selective extraction of lithium is achieved using oxalic acid, and the efficiency and kinetics of lithium extraction are improved under the combined action of herb-medicine residue and oxalic acid.
Article
Engineering, Environmental
Muxina Konarova, Nuno Batalha, Gabriel Fraga, Mohamed H. M. Ahmed, Steven Pratt, Bronwyn Laycock
Summary: This study presents a proof of concept for a technology that integrates PET recovery from mixed plastic waste and plastic pyrolysis. By depolymerizing PET into TPA using a low volatility oil as medium, it achieves low-pressure operation and a selective separation and recovery of TPA from the product mix. Full PET conversion and high TPA recovery were achieved, making it an effective solution for processing mixed waste streams and improving the yield and quality of liquid product from thermal pyrolysis compared to untreated feedstock.
Article
Engineering, Environmental
Zhenhua Sun, Jing Li, Xuejiang Wang, Siqing Xia, Jianfu Zhao
Summary: This study investigated the influence of in-situ formed MgFe2O4 on the hydrothermal treatment of swine manure. The results showed that the in-situ formation of MgFe2O4 improved the dehydration and decarboxylation of organic components in swine manure, thereby improving its carbonization degree. Furthermore, it enhanced the stabilization of heavy metals and the retention of phosphorus. MgFe2O4 modified hydrochars exhibited remarkable adsorption capacity for Pb(II) and Cu(II) without any leaching of heavy metals.
Article
Engineering, Environmental
Yijing Jiang, Boyang Leng, Jingxin Xi
Summary: The increased generation of municipal solid waste has had a significant impact on the economy, environment, and public health. The current waste treatment process has limitations. By developing a comprehensive social costing model, this study assesses the impacts of municipal solid waste management throughout its life cycle and provides policymakers with best practices and feasibility information.
Article
Engineering, Environmental
Marina Hernandes de Paula e Silva, Ricardo Coser Mergulha, Jose Geraldo Vidal Vieira, Andrea Brasco Pampanelli, Rodrigo Salvador, Diogo Aparecido Lopes Silva
Summary: This study developed and implemented a self-assessment tool to assist companies in decision-making processes for establishing circular flows based on Lean Manufacturing and Circular Economy principles. The tool utilized a maturity model and was applied to nine companies of varying characteristics. The findings revealed that certain companies showed higher maturity in water-waste and chemical-emissions management, with larger enterprises focusing on these strategies. However, many companies lacked sufficient training and employee awareness prior to seeking cleaner alternatives, and comprehensive actions to manage the product lifecycle were lacking. To address these gaps, the tool provided tailored recommendations for each company to improve their processes, products, and value chain.
Article
Engineering, Environmental
Gamze Dogdu, Turgay Pekdemir, Sanaz Lakestani, Seyda Karabork, Osman Cavus
Summary: This paper presents data on food waste associated with mini size food packaging services, highlighting the difficulties in emptying the food and consumer wastefulness as the main causes. These findings have significant implications for the sustainability of food and relevant packaging.
Article
Engineering, Environmental
Qingxia Li, Xin Kong, Yuxin Chen, Jianan Niu, Jia Jing, Jin Yuan, Yifeng Zhang
Summary: This study investigates how to enhance methane production from food waste after hydrothermal pretreatment. The results demonstrate a significant increase in methane yield when zero-valent iron and magnetite are used together, and high organic loading is favorable for methane production. Microbial diversity analysis further reveals the dominant pathways and metabolic processes involved in methane generation.
Article
Engineering, Environmental
D. H. H. Sim, I. A. W. Tan, L. L. P. Lim, E. T. Lau, B. H. Hameed
Summary: The development of controlled-release fertilizer formulation is important for preventing environmental pollution caused by nutrient leaching and volatilization. This study combined biochar-based fertilizer with encapsulation technology to improve the nutrient release mechanism. Optimal conditions for synthesizing urea-impregnated biochar (UIB) were determined using central composite design, and the release of nitrogen was described by mathematical models. Results showed that encapsulated UIB (EUIB) achieved complete release of nitrogen in water and exhibited improved water retention in sandy-textural soil. Therefore, EUIB derived from peppercorn waste has the potential to be used as a sustainable controlled-release fertilizer for agriculture.
Article
Engineering, Environmental
Yuchuan Wang, Neslihan Akdeniz
Summary: Incorporating biochar into composting systems can increase compost temperatures. This study developed a heat transfer model for a biochar-amended co-composting system and found that biochar increased thermal conductive losses but also enhanced microbial activity, resulting in an overall increase in total heat unit. When biochar was applied on the surface, it mainly functioned as an insulator.
Article
Engineering, Environmental
George Tsalis, Birger Boutrup Jensen, Jessica Aschemann-Witzel
Summary: This paper empirically explores the relationship between retail price promotions and household food waste. The results show that households with a higher proportion of discount food purchases and environmental awareness tend to waste less food, while larger households and those lacking food handling skills tend to waste more food.
Article
Engineering, Environmental
Lukas Friederici, Arne Koch, Patrick Martens, Jana Pantzke, Sebastiano Di Bucchianico, Thorsten Streibel, Christopher P. Rueger, Ralf Zimmermann
Summary: The increasing demand for lightweight materials has led to a rise in fiber-reinforced plastic (FRP) production. However, the properties and compositional range of FRPs pose challenges to recycling strategies. Pyrolysis has emerged as a promising method for separating the fibers from the polymer matrix. This study investigated the pyrolysis process using thermal analysis and high-resolution mass spectrometry, and also assessed the toxicity of the recovered fibers using an in vitro model.
Review
Engineering, Environmental
Devika Kannan, Shakiba Khademolqorani, Nassibeh Janatyan, Somaieh Alavi
Summary: This paper introduces Smart Waste Management (SWM) that applies Industry 4.0 technologies in waste management. A framework called SWM4.0 is developed, which highlights the importance of smart people, smart cities, smart enterprises, and smart factories in achieving successful waste management. The paper also suggests future research directions and managerial implications.