Article
Environmental Sciences
Kai Chen, Yue Sun, Jun Fan, YingPeng Gu
Summary: The study investigates the use of bioleaching combined with coal fly ash (BL-CFA) process to improve sludge dewatering performance. The BL-CFA process reduces the water content of the sludge and enhances the dewatering effect. Analysis of extracellular polymeric substances (EPS), fluorescence, Fourier transform infrared (FTIR) spectroscopy, and particle size variation, along with scanning electron microscopy (SEM), reveals the mechanisms behind the improvement in sludge dewatering. The BL-CFA process shows potential for superior sludge dewatering performance.
Article
Environmental Sciences
Maya Kebaili, Souad Djellali, Nadjib Drouiche, Hakim Lounici
Summary: Sewage treatment plants in Algeria produce large quantities of contaminated sludge. This study evaluates the potential use of protonated pectin extracted from orange waste as an eco-friendly flocculant in the chemical conditioning of sludge. The results show that protonated pectin can significantly improve the dryness of the sludge.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Energy & Fuels
Tianyu Liu, Chang Wen, Ke Zhou, Changkang Li, Youjian Zhu, Dapeng Wang, Rui Li, Zhenqi Jing
Summary: Co-combustion of sewage sludge and coal in coal-fired power plants can reduce PM1 emissions but increase PM1-10 emissions. The formation of species during co-combustion can be intensified by high temperature and turbulent flow fields. The condensable Ca and S vapor from coal combustion and Fe-rich and Ca-rich flocculants in sludge are the main factors influencing the emission characteristics.
Article
Engineering, Environmental
Misha Liu, Chenwei Yuan, Shaoqin Ru, Jie Li, Zhongfang Lei, Zhenya Zhang, Kazuya Shimizu, Tian Yuan, Fengting Li
Summary: In this study, a new all-organic conditioning method for sewage sludge pretreatment was investigated, using a combination of poly dimethyldiallylammonium chloride (PDMD) and tannic acid (TA). The results showed that the TA + PDMD mode had better sludge filterability and dewaterability, leading to the highest reported dewatering performance. The floc property played a crucial role in condensed sludge formation and deep dewatering process.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Energy & Fuels
Beata Bien, Jurand D. Bien
Summary: The research examined the impact of various sewage sludge conditioning methods on dewatering during pressure filtration processes, with the best results achieved using sonicated sludge prepared with the inorganic coagulant PIX 113. The combined effect of sonication with the addition of chemicals also reduced organic substances, ammonium nitrogen, and phosphates in the filtrate post-dewatering.
Article
Environmental Sciences
Haixiang Yu, Daofang Zhang, Lin Gu, Haifeng Wen, Nanwen Zhu
Summary: This study investigated the effect of synthesis conditions on the properties of sludge-based biochar and its dewatering performance. It was found that increasing the pyrolysis temperature could enhance the catalysis and adsorption sites of the biochar, improving the dewaterability of the sludge. Additionally, the pores of the biochar acted as skeleton builders, providing more drainage channels. Electrolysis treatment using the biochar significantly reduced the capillary suction time and specific resistance of filtration, while increasing the net sludge solids yield. Moreover, it also decreased the hydrophilic alpha-Helix content in proteins, indicating the crucial role of char characteristics in protein reduction and subsequent dewatering enhancement.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Shengya Gao, Qiming Wang, Jing Nie, Chi Sun Poon, Hui Yin, Jiang-shan Li
Summary: Adsorption methods are widely used in wastewater treatment for their high efficiency and little environmental pollution. In this study, high-iron containing incineration sewage sludge ash was modified to improve its adsorption capacity for As(V). The modified ISSA showed excellent potential for removing As(V) under acidic conditions and maintained a satisfying adsorption capacity after multiple cycles of regeneration.
Article
Engineering, Chemical
Pawel Wolski
Summary: The study focuses on the combined use of physical and chemical methods to enhance the efficiency of the fermentation and dehydration processes. It was found that the combined methods negatively impact the filtration capacity of sludge before fermentation but contribute to improved filtration capacity after stabilization. Furthermore, the CSK values, final hydration, and resistance of the sludge decrease during the fermentation process.
DESALINATION AND WATER TREATMENT
(2023)
Article
Engineering, Environmental
Minghao Jin, Huan Liu, Hongping Deng, Han Xiao, Geng Lu, Hong Yao
Summary: This study systematically investigated the effects of Fenton-CaO composite conditioning on the behavior of arsenic during sludge treatment. The results showed that the Fenton-CaO treatment could significantly reduce the release of arsenic and the toxicity of the products.
Review
Environmental Sciences
Yankai Liang, Rui Wang, Wenquan Sun, Yongjun Sun
Summary: This article analyzes the composition and properties of municipal sludge and examines the factors affecting its dewatering performance. It introduces various chemical conditioning methods and systematically analyzes the principles and applications of existing sludge conditioning technologies. It emphasizes the importance of developing a more appropriate combination of sludge conditioning and dewatering processes and optimizing the dewatering process by developing new efficient and environmentally friendly sludge conditioning agents.
Article
Environmental Sciences
Ziyao Shi, Xiaorong Zhao, Zaiqian Wang, Yihan Huang, Yimin Luo, Xuquan Huang
Summary: This study investigated the effect of particle size distribution of quartz sand conditioners on sludge dewatering performance. The results showed that the particle size distribution significantly influenced the efficiency of sludge dewatering. By changing the particle size distribution, the conditioners improved the dewatering channels and pore structure of the sludge.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Energy & Fuels
Ruizhi Chu, Yulong Li, Xianliang Meng, Lulu Fan, Guoguang Wu, Xiao Li, Xiaofeng Jiang, Shi Yu, Yuanfeng Hu
Summary: This study investigated the mechanism of modified sludge coal water slurry (MSCWS). It found that modification destroyed the flocculent structure and polar functional groups of the sludge, leading to improved adsorption efficiency of additives and stability of the slurry. The modified MSCWS showed increased concentration, continuous flow, and significant stability enhancement.
Article
Energy & Fuels
Tomasz Kamizela, Mariusz Kowalczyk
Summary: Sludge dewatering is crucial in the processing and management of sludge, with the selection of dewatering method and conditioning of sludge playing a key role in its effectiveness. Polyelectrolyte improves filtration efficiency, while fly ash and zeolite slow down the process but reduce cake hydration.
Article
Green & Sustainable Science & Technology
Gabriela Rutkowska, Marek Chalecki, Mariusz Zoltowski
Summary: The use of waste materials as substitutes for traditional raw materials is increasingly important; municipal sewage sludge can be used after proper stabilization through thermal processing, but the resulting fly ash must be utilized properly.
Review
Environmental Sciences
Xudong Zhang, Peng Ye, Yajun Wu
Summary: This manuscript provides a comprehensive description of the characteristics of sludge, the advantages and disadvantages of preconditioning methods, and the action mechanisms. It also introduces the principles and engineering applications of mechanical dewatering techniques, especially the use of vacuum preloading as an in-situ dewatering technology in sludge. The cost analysis of different methods is conducted to explore their feasibility and provide new insights for engineering applications.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Xinping Zhang, Yuxin Guo, Xiaoyang Liu, Shun-Yu Wu, Ya-Xuan Zhu, Shao-Zhe Wang, Qiu-Yi Duan, Ke-Fei Xu, Zi-Heng Li, Xiao-Yu Zhu, Guang-Yu Pan, Fu-Gen Wu
Summary: This study develops a nanotrigger HCFT for simultaneous photodynamic therapy and light-triggered ferroptosis therapy. The nanotrigger can relieve tumor hypoxia, induce enhanced photodynamic reaction, and facilitate the continuation of Fenton reaction, ultimately leading to lethal ferroptosis in tumor cells.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Olumide Bolarinwa Ayodele, Toyin Daniel Shittu, Olayinka S. Togunwa, Dan Yu, Zhen-Yu Tian
Summary: This study focused on the semihydrogenation of acetylene in an ethylene-rich stream using two alloyed Pt catalysts PtCu and PtCo. The PtCu catalyst showed higher activity and ethylene yield compared to PtCo due to its higher unoccupied Pt d-orbital density. This indicates that alloying Pt with Cu is more promising for industrial relevant SHA catalyst.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Guowei Chen, Wen-Cheng Chen, Yaozu Su, Ruicheng Wang, Jia-Ming Jin, Hui Liang, Bingxue Tan, Dehua Hu, Shaomin Ji, Hao-Li Zhang, Yanping Huo, Yuguang Ma
Summary: This study proposes an intramolecular dual-locking design for organic luminescent materials, achieving high luminescence efficiency and performance for deep-blue organic light-emitting diodes. The material also exhibits unique mechanochromic luminescence behavior and strong fatigue resistance.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Joren van Stee, Gregory Hermans, Jinu Joseph John, Koen Binnemans, Tom Van Gerven
Summary: This work presents a continuous solvent extraction method for the separation of cobalt and nickel in a millifluidic system using Cyphos IL 101 (C101) as the extractant. The optimal conditions for extraction performance and solvent properties were determined by investigating the effects of channel length, flow rate, and temperature. The performance of a developed manifold structure was compared to a single-channel system, and excellent separation results were achieved. The continuous separation process using the manifold structure resulted in high purity cobalt and nickel products.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Yan Xu, Jingai Jiang, Xinyi Lv, Hui Li, Dongliang Yang, Wenjun Wang, Yanling Hu, Longcai Liu, Xiaochen Dong, Yu Cai
Summary: A programmed gas release nanoparticle was developed to address the challenges in treating diabetic infected wounds. It effectively removes drug-resistant pathogens and remodels the wound microenvironment using NO and H2S. The nanoparticle can eliminate bacteria and promote wound healing through antibacterial and anti-inflammatory effects.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Tong Xia, Zhilin Xi, Lianquan Suo, Chen Wang
Summary: This study investigated a highly efficient coal dust suppressant with low initial viscosity and high adhesion-solidification properties. The results demonstrated that the dust suppressant formed a network of multiple hydrogen bonding cross-linking and achieved effective adhesion and solidification of coal dust through various chemical reactions.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Jinzhi Cai, Zhenshan Li
Summary: A density functional theory-based rate equation was developed to predict the gas-solid reaction kinetics of CaO carbonation with CO2 in calcium looping. The negative activation energy of CaO carbonation close to equilibrium was accurately predicted through experimental validation.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Jianxiong Chen, Fuhao Ren, Ningning Yin, Jie Mao
Summary: This study presents an economically efficient and easily implementable surface modification approach to enhance the high-temperature electrical insulation and energy storage performance of polymer dielectrics. The self-assembly of high-insulation-performance boron nitride nanosheets (BNNS) on the film surface through electrostatic interactions effectively impedes charge injection from electrodes while promoting charge dissipation and heat transfer.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Zijian Li, Zhaohui Yang, Shao Wang, Hongxia Luo, Zhimin Xue, Zhenghui Liu, Tiancheng Mu
Summary: This study reports a strategy for upgrading polyester plastics into value-added chemicals using electrocatalytic methods. By inducing the targeted transfer of *OH species, polyethylene terephthalate was successfully upgraded into potassium diformate with high purity. This work not only develops an excellent electrocatalyst, but also provides guidance for the design of medium entropy metal oxides.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Navneet Singh Shekhawat, Surendra Kumar Patra, Ashok Kumar Patra, Bamaprasad Bag
Summary: This study primarily focuses on developing a sulphur dyeing process at room temperature using bacterial Lysate, which is environmentally friendly, energy and cost effective, and sustainable. The process shows promising improvements in dye uptake and fastness properties.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Dengjia Shen, Hongyang Ma, Madani Khan, Benjamin S. Hsiao
Summary: This study developed cationic PVC nanofibrous membranes with high filtration and adsorption capability for the removal of bacteria and hexavalent chromium ions from wastewater. The membranes demonstrated remarkable performance in terms of filtration efficiency and maximum adsorption capacity. Additionally, modified nanofibrous membranes were produced using recycled materials and showed excellent retention rates in dynamic adsorption processes.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Xiaoyan Wang, Zhikun Wang, Ben Jia, Chunling Li, Shuangqing Sun, Songqing Hu
Summary: Inspired by photosystem II, self-supported Fe-doped NiCoP nanowire arrays modified with carboxylate were constructed to boost industrial-level overall water splitting by employing the concerted proton-coupled electron transfer mechanism. The introduction of Fe and carboxyl ligand led to improved catalytic activity for HER and OER, and NCFCP@NF exhibited long-term durability for overall water splitting.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Pengyao Yu, Ge Yang, Yongming Chai, Lubomira Tosheva, Chunzheng Wang, Heqing Jiang, Chenguang Liu, Hailing Guo
Summary: Thin LTA zeolite membranes were prepared through secondary growth of nano LTA seeds in a highly reactive gel, resulting in membranes with superior permeability and selectivity in gas separation applications.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Baiqin Zhou, Huiping Li, Ziyu Wang, Hui Huang, Yujun Wang, Ruichun Yang, Ranran Huo, Xiaoyan Xu, Ting Zhou, Xiaochen Dong
Summary: The use of machine learning to predict the performance of specific adsorbents in phosphate adsorption shows great promise in saving time and revealing underlying mechanisms. However, the small size of the dataset and insufficient detailed information limits the model training process and the accuracy of results. To address this, the study employs a fuzzing strategy that replaces detailed numeric information with descriptive text messages on the physiochemical properties of adsorbents. This strategy allows the recovery of discarded samples with limited information, leading to accurate prediction of adsorption amount, capacity, and kinetics. The study also finds that phosphate uptake by adsorbents is generally through physisorption, with some involvement of chemisorption. The framework established in this study provides a practical approach for quickly predicting phosphate adsorption performance in urgent scenarios, using easily accessible information.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Paula Alejandra Lamprea Pineda, Joren Bruneel, Kristof Demeestere, Lisa Deraedt, Tex Goetschalckx, Herman Van Langenhove, Christophe Walgraeve
Summary: This study evaluates the use of four esterified fatty acids and three vegetable oils as absorption liquids for hydrophobic VOCs. The experimental results show that isopropyl myristate is the most efficient liquid for absorbing the target VOCs.
CHEMICAL ENGINEERING JOURNAL
(2024)