Article
Chemistry, Physical
You-Hsin Chen, Thi Ngoc Lan Thao Ngo, Kung-Yuh Chiang
Summary: This research investigates enhanced hydrogen production in sewage sludge and industrial wastewater sludge co-gasification. The experimental results demonstrate that the high catalytic Fe/Mn content in industrial wastewater sludge increases hydrogen production, with the produced gas heating value and cold gas efficiency falling within acceptable ranges.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Patrik Elbl, Marek Balas, Martin Lisy, Hana Lisa
Summary: The gasification process of sewage sludge and digestate was investigated in a pilot-scale fluidized bed gasifier. These by-products are commonly used as fertilizers, but their usage is restricted due to the presence of heavy metals, pathogens, and bacteria. Gasification of these by-products proved to be more efficient as the produced syngas can be used for combined heat and power generation. Analysis of the syngas and tar revealed that the gasification process can be operated at 750 degrees C without ash slagging, and steam addition improved the tar reduction.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Engineering, Environmental
Petteri Peltola, Lauri Ruottu, Markus Larkimo, Arttu Laasonen, Kari Myohanen
Summary: Sewage sludge, a by-product of wastewater treatment, can be a potential resource for renewable energy and nutrient recovery. However, it contains various toxins and harmful pollutants that can pose hazards to the environment and human health. An advanced treatment technique involving drying and combustion of the sludge has been proposed, which eliminates unwanted organic compounds and produces ash high in nutrients and low in heavy metals for fertilizer production. This technique is self-sufficient in terms of energy and has been successfully implemented in a sludge combustion plant.
Article
Energy & Fuels
Burak Ulusoy, Bozidar Anicic, Weigang Lin, Bona Lu, Wei Wang, Kim Dam-Johansen, Hao Wu
Summary: This study investigated the interactions in NOX chemistry during biomass co-combustion, finding that the effect varies with different biomass fuels and ash characteristics. The catalytic effect of ash on NO formation is influenced by ash preparation temperature and mixing with fuel. The impact of NH3 on NO depends on the stage of the co-combustion process, and NO emissions are reduced and the influence of ash on nitrogen chemistry is less pronounced under air staged conditions.
Article
Chemistry, Physical
Van-Thang Nguyen, Kung-Yuh Chiang
Summary: This research evaluates the hydrogen production and removal ability of impurity (e.g. tar and NH3) generated from sewage and textile sludge co-gasification. The experimental results demonstrate that the combination of the fluidized-bed gasifier and the hot-gas cleaning system effectively mitigates the impurities in the produced gas, with high gas yield and energy efficiency.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Van-Thang Nguyen, Kung-Yuh Chiang
Summary: This research evaluates the hydrogen production and removal of impurities from the co-gasification of sewage and textile sludge using a lab-scale fluidized-bed gasifier with a hot-gas cleaning system. The experimental results indicate that the impurities were effectively mitigated by the hot-gas cleaning system, and the system can potentially be applied to other organic wastes.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Thermodynamics
Yunan Chen, Lei Yi, Jiarong Yin, Hui Jin, Liejin Guo
Summary: The study investigated the supercritical water gasification of sewage sludge in a fluidized bed reactor, focusing on the effects of temperature on product distribution and gas compositions. It was found that increasing temperature enhanced the dissolution and hydrolysis of organic matter in the sludge, leading to increased gas production. Furthermore, temperature elevation also induced dehydrogenation and polymerization reactions, which could be explained by the Diels-Alder mechanism.
Article
Engineering, Environmental
A. V. Fedorov, Yu. V. Dubinin, P. M. Yeletsky, I. A. Fedorov, S. N. Shelest, V. A. Yakovlev
Summary: This study presents the simulation results of a sewage sludge combustion plant with a productivity of 6 tons per hour using ASPEN Plus. It shows that catalytic combustion technology can efficiently utilize mechanically dehydrated sludge and discusses the impact of sludge moisture and calorific value on the combustion process, as well as the emissions of harmful substances and methods for their treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Review
Environmental Sciences
Yao Xu, Longlong Zhang, Jiabin Chen, Tongcai Liu, Nan Li, Jiao Xu, Wenjun Yin, Dapeng Li, Yalei Zhang, Xuefei Zhou
Summary: This paper provides an overview of phosphorus transformation in sewage sludge incineration, characterization of sewage sludge ash components, and wet-chemical and thermochemical processes for phosphorus recovery with comprehensive technical, economic, and environmental assessment. Legislation is significant for promoting phosphorus recovery from sewage sludge ash due to weak economics.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Energy & Fuels
Max Schmid, Christian Schmidberger, Guenter Scheffknecht
Summary: This study presents a gasifier model for steam-oxygen gasification of sewage sludge and conducts simulations to evaluate its performance. The model, built in Aspen Plus software, combines equilibrium and empirical approaches. The predictions of the model are found to be accurate compared to experimental data. Sensitivity analysis reveals the significant impact of operation parameters on the oxygen demand and cold gas efficiency of the gasifier. By adjusting the steam to carbon ratio, the stoichiometry of the syngas can be tailored for specific downstream applications. Moreover, the simulations highlight the need to consider the nitrogen concentration originating from fuel-bound nitrogen in water-free syngas for downstream applications.
Article
Energy & Fuels
Bin Liang, Haolong Bai, Bo Tan, Liangliang Fu, Dingrong Bai
Summary: To solve the issue of burning wet coal slime in circulating fluidized bed (CFB) boilers, a proposal is made to dry coal slime in a low-temperature drying system and burn the dried fine powders in a CFB with a highly efficient separator. Experimental results show that the dried slime particles can be burned stably, efficiently, and cleanly with a particle size distribution similar to that of circulating ash particles. This study presents a potential opportunity to advance CFB combustion technology.
Article
Thermodynamics
Li Yaode, Yang Dong, Zhou Xihong, Dong Le, Suo Lihui, Sun Wenbo
Summary: The migration characteristics and volatility of heavy metals are influenced by temperature during the co-combustion process. The presence and proportion of different heavy metals in the gas phase and solid phase vary at different temperatures. Higher temperatures lead to higher volatility of heavy metals, with shorter time to reach maximum volatility.
JOURNAL OF THERMAL SCIENCE
(2022)
Article
Engineering, Chemical
Jia Wei Chew, W. Casey Q. LaMarche, Ray A. Cocco
Summary: As we celebrate the 100th anniversary of the commercialization of the fluidized bed reactor, it is evident that fluidized bed technology has undergone significant advancements in the past century. With the development of sophisticated models, experimentation techniques, and statistical tools, as well as the utilization of computational platforms and AI, the application of fluidized bed technology is expected to become more cost-effective and efficient.
Review
Environmental Sciences
Matej Husek, Jaroslav Mosko, Michael Pohorely
Summary: With the growing emphasis on environmental protection, this review analyses different methods of sewage sludge treatment in terms of potential environmental risk and raw materials recovery. The study suggests that direct use of sewage sludge in agriculture should no longer be considered as a source of nutrients and organic matter due to its pollutant content. The review also highlights pyrolysis as a sustainable method for sludge treatment in remote locations with low heavy metal content, and discusses different technologies for recovering phosphorus from sludge ash.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Review
Green & Sustainable Science & Technology
Leslaw Swierczek, Bartlomiej Michal Cieslik, Piotr Konieczka
Summary: This article discusses the method of using sewage sludge ash (SSA) in cement building materials and its environmental benefits. In addition, the article analyzes the impact of SSA on the characteristics of building materials and the effectiveness of cement products in immobilizing contaminants.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Energy & Fuels
Xin Wang, Qiangqiang Ren, Wei Li, Shiyuan Li, Qinggang Lu
Article
Energy & Fuels
Shiyuan Li, Wei Li, Mingxin Xu, Xin Wang, Haoyu Li, Qinggang Lu
Article
Engineering, Chemical
Liyong Wang, Shiyuan Li, Eric G. Eddings
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2015)
Article
Thermodynamics
Xin Wang, Qiangqiang Ren, Linna Li, Shiyuan Li, Qinggang Lu
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2016)
Article
Energy & Fuels
Shiyuan Li, Mingxin Xu, Lufei Jia, Li Tan, Qinggang Lu
Article
Energy & Fuels
Xin Wang, Qangqiang Ren, Wei Li, Haoyu Li, Shiyuan Li, Qinggang Lu
Article
Engineering, Chemical
Qiangqiang Ren, Shiyuan Li, Dongyu Wang, Shaolin Bao, Qinggang Lu
CHEMICAL ENGINEERING & TECHNOLOGY
(2015)
Article
Energy & Fuels
Wei Li, Dianbin Liu, Shiyuan Li
Article
Energy & Fuels
Dianbin Liu, Wei Li, Shiyuan Li
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2019)
Article
Engineering, Chemical
Wenhao Song, Shiyuan Li, Ziqu Ouyang
Article
Energy & Fuels
Wei Li, Dianbin Liu, Shiyuan Li, Runjuan Kong
Article
Energy & Fuels
Wei Li, Shiyuan Li, Mingxin Xu, Xin Wang
JOURNAL OF THE ENERGY INSTITUTE
(2018)
Article
Energy & Fuels
Mingxin Xu, Shiyuan Li, Yinghai Wu, Lufei Jia
Article
Energy & Fuels
Shiyuan Li, Haoyu Li, Wei Li, Mingxin Xu, Eric G. Eddings, Qiangqiang Ren, Qinggang Lu
Article
Energy & Fuels
Mingxin Xu, Shiyuan Li, Yinghai Wu, Lufei Jia, Qinggang Lu
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.
