Article
Environmental Sciences
Chuen Tse Kuah, Qi Yun Koh, Srithar Rajoo, Kuan Yew Wong
Summary: This article provides a bibliometric overview of academic research on waste heat recovery (WHR) over a period of 30 years from 1991 to 2020. The analysis includes various actors in the field, such as funding agencies, journals, authors, organizations, and countries. The research identifies the most productive and influential actors, established and emergent research topics, as well as collaboration patterns in the field. The findings serve as a robust roadmap for further research in this area.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Environmental Sciences
Bemgba Bevan Nyakuma, Nur Izwanne Mahyon, Meng Soon Chiong, Srithar Rajoo, Apostolos Pesiridis, Syie Luing Wong, Ricardo Martinez-Botas
Summary: The recovery and utilisation of waste heat from flue/exhaust gases have the potential to provide sustainable energy and reduce pollutant emissions. This paper presents a comprehensive review and analysis of the research landscape in this field. The results show a growing interest in this topic due to environmental concerns, research collaborations, and funding availability.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Thermodynamics
Somchart Chantasiriwan
Summary: This paper proposes a blowdown heat recovery system using a steam dryer and compares it with the use of blowdown heat for feed water heating. Simulation results show that using blowdown heat for steam drying results in a significantly larger net power output, and the integration of this heat recovery system is economically feasible.
Article
Chemistry, Multidisciplinary
Robert Stefan Vizitiu, Andrei Burlacu, Cherifa Abid, Marina Verdes, Marius Costel Balan, Marius Branoaea
Summary: The study focused on designing an innovative waste heat recovery system to recover waste heat energy from cooling liquids used in industry. The system uses heat pipes to capture thermal energy and transfer it to cold water. Results showed an efficiency of the system up to 76.7%.
APPLIED SCIENCES-BASEL
(2021)
Article
Green & Sustainable Science & Technology
Andrea Gatto
Summary: Energy recovery from waste is a viable option for waste management when other strategies are not feasible. It can facilitate the transition to a circular economy, improve sustainability, and create economic benefits. European countries have made efforts to improve their energy management efficiency from waste and align with circular economy principles.
JOURNAL OF CLEANER PRODUCTION
(2023)
Review
Chemistry, Physical
A. G. Olabi, Khaled Elsaid, Enas Taha Sayed, Mohamed S. Mahmoud, Tabbi Wilberforce, Raid J. Hassiba, Mohammad Ali Abdelkareem
Summary: Heat is the most common form of energy, with waste heat recovery aiming to recover energy losses. Nanofluids have shown promising potential and feasibility in improving energy recovery efficiency in recent years.
Article
Thermodynamics
D. Di Battista, F. Fatigati, R. Carapellucci, R. Cipollone
Summary: This paper presents a combined solution by coupling two thermodynamic cycles for waste heat recovery in internal combustion engines to improve efficiency. By designing heat exchangers suitable for engine working points, the combined recovery system ensures optimal performance in a wide range of conditions.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Engineering, Chemical
Paulo A. B. de Sampaio
Summary: Desalination technologies, particularly membrane distillation (MD), are effective in addressing water scarcity issues. This study focuses on modelling a Direct Contact Membrane Distillation (DCMD) plant with heat recovery, using a multiscale approach to address the problem and achieving good agreement with experimental data. The methodology presented in this work can be applied to simulate the performance of DCMD desalination plants with heat recovery.
Article
Green & Sustainable Science & Technology
Miriam Benedetti, Lorena Giordano, Marcello Salvio
Summary: Currently, industrial companies are becoming increasingly aware that a significant amount of the energy they consume each year is being wasted as waste heat. Despite growing awareness, incentives, and the availability of mature and market-ready waste heat recovery technologies, industrial heat recovery measures are still not being implemented, mainly due to non-technological barriers. These barriers include the lack of reliable data on heat consumption, waste heat recovery potentials, and the types, costs, and benefits of heat recovery practices. The aim of this study is to fill this information gap for the textile sector by providing a knowledge base derived from real industrial data collected through a large-scale survey. These findings can be used by companies to identify and evaluate potential heat recovery opportunities for their processes, and by academics and policymakers to estimate recovery potentials.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Environmental
Tsai-Pin Chiang, Chia -Yen Lee
Summary: This study examines energy recovery from waste in incineration plants, focusing on electricity generation. The waste treatment process is found to be the main cause of inefficiency, suggesting the need for resource reallocation by incinerator operators. Most plants maintain constant returns-to-scale, but some inefficient incinerators in Southern Taiwan should be rescaled for productivity improvement.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Thermodynamics
Bachir El Fil, Srinivas Garimella
Summary: Thermal drying is energy intensive, but exhaust gas recirculation and waste heat recovery can help reduce energy wastage. Experimental results show that optimal exhaust gas recirculation and preheating methods can significantly reduce specific moisture extraction ratio and drying time.
Article
Engineering, Environmental
Selcuk Selimli, Khaled Mohamed Ashnaaf Abajja
Summary: Through experimental study, it is confirmed that graywater heat recovery with a wire on a tube heat exchanger can reduce energy consumption and processing time of household dishwashers, leading to a decrease in CO2 emissions.
WATER ENVIRONMENT RESEARCH
(2021)
Article
Thermodynamics
Jahedul Islam Chowdhury, Faisal Asfand, Mohammad Ja' Fari, Sanjay Mukherjee, Nazmiye Balta-Ozkan
Summary: The recovery of waste heat in commercial bakeries is an effective measure for energy saving and emission reduction. This study investigates various heat recovery options and finds that air preheating is the most energy-efficient and cost-effective option.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Environmental Sciences
Tihomir Tomic, Irma Kremer, Stefano Vecchio Ciprioti, Daniel Rolph Schneider
Summary: This research analyzed the composition and characteristics of packaging waste, rejected waste, and refuse-derived fuel (RDF) collected from municipal waste management system. The efficiency of waste separation and RDF production were tracked, and the results showed high separation efficiency and energy recovery potential. The study highlights the importance of individual waste components' separation efficiency in alternative fuel production and the connection between increasing material recovery share and the suitability of residual waste for further recovery and valorization.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Green & Sustainable Science & Technology
Pello Larrinaga, Alvaro Campos-Celador, Jon Legarreta, Gonzalo Diarce
Summary: Industrial waste heat recovery has the potential to increase energy efficiency in industry, but data on waste heat flows is crucial for designing effective strategies. Bottom-up methodologies for estimating recovery potential and analyzing economic viability are important for the adoption of energy efficiency measures.
JOURNAL OF CLEANER PRODUCTION
(2021)
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.