Article
Construction & Building Technology
Yixi Tian, A. C. Thanos Bourtsalas, Shiho Kawashima, Nickolas J. Themelis
Summary: US WTE plants generate a large amount of fly ash and bottom ash, and a study examined the utilization of the sandy fraction of combined ash in cement mortar by using it as a sand substitute or as a cement substitute. The results showed that both applications were effective and could transform the ash into nonhazardous materials.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Engineering, Environmental
Robert J. Giraud, Philip H. Taylor, Chin-pao Huang
Summary: This paper presents the first comprehensive survey of combustion operating conditions in municipal waste-to-energy facilities in the U.S. The survey results indicate typical operating conditions include a furnace temperature above 1160 degrees C, gas residence time over 2.4 s, exit gas concentrations of nearly 10% for oxygen, and over 16% for moisture.
Article
Green & Sustainable Science & Technology
Leonid Vasiliu, Osman Gencel, Ioan Damian, Maria Harja
Summary: The co-incineration of tires waste in cement plants has multiple benefits including saving raw materials, reducing CO2 emissions, recovering thermal energy from waste with high energy content, and reducing waste disposal.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Biotechnology & Applied Microbiology
Aixa Gonzalez, Karen Manquian-Cerda, Tamara Maldonado, Raul Calderon, Binoy Sarkar, Nicolas Arancibia-Miranda
Summary: Imogolite can be obtained from cement kiln dust (CKD) through a simple waste valorization method, and it shows similar properties to conventional imogolite despite the presence of a byproduct called allophane. Both imogolites were effective in removing arsenite from water, with Imo-CKD showing slightly higher efficiency. This study provides a cost-effective alternative for imogolite synthesis and water pollutant removal.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Environmental Sciences
Anand Prakash, Ritesh Ramesh Palkar
Summary: This paper discusses the techniques of co-processing plastic waste in cement kiln for energy recovery. The eco-friendly disposal of plastic waste has become a global issue, and the authors propose innovative methods for utilizing plastic waste in cement production to address waste disposal problems and promote energy recovery.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Yixi Tian, Nickolas J. Themelis, Diandian Zhao, A. C. Thanos Bourtsalas, Shiho Kawashima
Summary: This study investigated two approaches for managing Waste-to-Energy fly ash: stabilizing the ash with phosphoric acid and disposing it in non-hazardous landfills, or using the stabilized ash as a substitute for cement in construction. The study found that the stabilized ash met the necessary standards and could be used as a cement substitute, with similar mechanical performance of cement mortars. The leachability of heavy metals in the stabilized ash was also under the non-hazardous limits.
Article
Geosciences, Multidisciplinary
Rui Guo, Jiaoyue Wang, Longfei Bing, Dan Tong, Philippe Ciais, Steven J. Davis, Robbie M. Andrew, Fengming Xi, Zhu Liu
Summary: Because of the alkaline nature and high calcium content of cements, they can serve as a CO2-absorbing agent and reduce emissions during production. A life-cycle assessment is necessary to determine the actual net carbon impacts of the cement industry. Mortar is estimated to be the greatest contributor to the total carbon uptake among four types of cement materials.
EARTH SYSTEM SCIENCE DATA
(2021)
Article
Thermodynamics
Ali H. Abdulrahim, J. N. Chung
Summary: This study investigates the potential of using syngas generated from biomass high-temperature steam gasification systems as fuel for gas turbine backup units in Kuwait. By hybridizing HTSG systems with CPDPs, fossil fuel dependence can be reduced and landfill waste can be minimized. The synergies of hybridizing biomass HTSG systems with conventional CPDPs are discussed, showing an increase in power capacity and water gain ratio, as well as a decrease in waste landfilling and water consumption rates.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Environmental Sciences
Yong Yin, Dong Lv, Tianle Zhu, Xinghua Li, Ye Sun, Shuaishuai Li
Summary: The study investigated the removal and transformation behaviors of unconventional air pollutants in various facilities of cement kiln-end, showing different impacts of each installation on the concentrations of PAHs, heavy metals, and carbonyl compounds. The results indicated that SP boiler significantly decreased the concentrations of PAHs and heavy metals, while raw mill and baghouse filter accelerated the volatilization and removal of compounds. Additionally, SCR-DeNO(x) system also played a role in removing some gas-phase PAHs and carbonyl compounds.
Article
Engineering, Environmental
Ukrit Suksanguan, Thanapong Champahom, Sajjakaj Jomnonkwao, Chamroeun Se, Vatanavongs Ratanavaraha
Summary: Industrial waste disposal in cement kilns co-processing is a resource-saving, environmentally beneficial approach. This study developed a novel analysis method by investigating the factors influencing the selection of waste disposal services, and it can provide effective measures for operations based on individual differences and minimize bias and incorrect inference.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Environmental Sciences
Wen-Wen Ye, Peng-Tao Cai, Ming-Xiu Zhan, Wen-Tao Jiao, Xu-Xu, Jian-Ying Fu, Tong Chen, Xiao-Dong Li
Summary: Cement kiln collaborative disposal technology can dispose of hazardous waste and provide energy for the cement industry. The addition of hazardous waste may promote the formation of dioxins in cement kilns. This study investigated the concentrations of dioxins in different parts of the kiln when processing various hazardous solid wastes. The results showed that the concentration of dioxin increased after the addition of hazardous waste and the type and proportion of waste affected the formation of dioxins. This study provides a basis for exploring the environmental benefits of co-processing hazardous waste in cement kilns.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Kazuko Yui, Hidetoshi Kuramochi, Masahiro Osako
Summary: This study evaluated the performance of multizonal thermodynamic equilibrium calculation in waste incineration by comparing results with incineration tests and literature information. The calculation successfully reproduced the gas phase chemical speciation of heavy metals in the incinerator expected from high temperature properties but did not match the measured fly ash speciation. Possible reasons for these inconsistencies were considered.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Chemistry, Physical
Karolina Wojtacha-Rychter, Adam Smolinski
Summary: This paper presents the analysis of environmental and economic benefits of using waste as an energy source in cement clinker production. The study shows that substituting coal with refuse-derived fuels and sewage sludge can reduce carbon emissions and bring multiple benefits.
Article
Engineering, Environmental
Hamza Samouh, Vikram Kumar, Halle -Mari Santiago, Nishant Garg
Summary: Waste-to-Energy facilities incinerate 11% of global solid waste, generating bottom and fly ashes. The secondary use of WTE ashes in industrial applications can reduce environmental risks. However, the inconsistent mineralogy of these ashes restricts their reuse. This study demonstrates the potential of Raman spectroscopy for rapid monitoring of WTE fly ash mineralogy.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Jalil Shadbahr, Mahmood Ebadian, Giovanna Gonzales-Calienes, Miyuru Kannangara, Leila Ahmadi, Farid Bensebaa
Summary: Bioenergy pathways based on waste-to-energy technologies are potential solutions to address climate change and a lack of sustainable municipal solid waste diversion solutions. This study develops an integrated decision-making framework and modeling tools to evaluate the upstream operations and energy recovery technologies of the waste supply chain. The results show that the greenhouse gas emissions of these pathways are slightly higher than fossil-based heating, indicating the need for further technology optimization and improvement.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
