Article
Engineering, Environmental
Aina Soler-Jofra, Lisbeth Schmidtchen, Lluc Olmo, Mark C. M. van Loosdrecht, Julio Perez
Summary: This study investigates the short and long term impact of hydroxylamine on partial nitritation granular sludge. The results indicate that dissolved oxygen is the main factor determining the impact of hydroxylamine. Short term hydroxylamine feeding with low dissolved oxygen leads to higher hydroxylamine accumulation and N2O production, while long term hydroxylamine feeding reduces ammonium consumption rate.
Article
Engineering, Environmental
Guoqiang Liu, Xianwei Wu, Deyong Li, Lugao Jiang, Ju Huang, Li Zhuang
Summary: The study showed that short-term low dissolved oxygen increased N2O emissions, while long-term low DO decreased emissions by increasing the abundance of ammonia oxidizers in the ASP. Long-term low DO reduced AOB abundance but increased AOA, with AOA potentially inhibiting N2O production. The positive correlation between N2O emissions and nitrite concentration became insignificant after 80 days of low DO operation, suggesting that ASPs can reduce N2O production and CO2 emissions by operating with low DO and extended sludge age.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Xi Zhang, Ying Jiao, Bingxue Wang, Xintong Xu, Yubing Dong, Zhengqin Xiong
Summary: Soil nitrification, driven by ammonia-oxidizing microorganisms, is a crucial source of nitrous oxide (N2O) and nitric oxide (NO). Biochar amendment and climate warming can regulate soil nitrification, but their effects on different aged biochars and temperature combinations remain unclear.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Biodiversity Conservation
Di Liang, G. Philip Robertson
Summary: The long-term contribution of nitrification to nitrous oxide (N2O) emissions as well as the proportion of N2O derived from nitrification in different ecosystems remains uncertain, with actual values likely to be lower than estimated due to low N2O yields in cultured nitrifiers and competing sinks for available NH4+.
GLOBAL CHANGE BIOLOGY
(2021)
Article
Agricultural Engineering
Junkai Zhao, Shuhan Lei, Guangwei Cheng, Ju Zhang, Bingfeng Shi, Shuting Xie, Jianqiang Zhao
Summary: The inhibitory roles of hydroxylamine (NH2OH) and hydrazine (N2H4) on nitrite-oxidizing bacteria were investigated in a comparative study. The results showed that nitrite accumulation was achieved by adding NH2OH or N2H4, with NH2OH having a more significant effect. However, nitritation deteriorated after the cessation of inhibitors addition.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Xiaodan Gu, Yong Huang, Yuting Hu, Wenhui Huang, Miao Zhang
Summary: Stable partial nitrification is still challenging to achieve under mainstream conditions. The study found that a low nitrite concentration is crucial for suppressing the growth of nitrite-oxidizing bacteria (NOB), and there is a significant correlation between nitrite levels and the percentage of NOB in bacterial communities.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Biodiversity Conservation
Manman Chen, Hong Pan, Mingjie Sun, Wei He, Meng Wei, Yanhong Lou, Hui Wang, Quangang Yang, Haojie Feng, Yuping Zhuge
Summary: Organic fertilizer application increased N2O emissions from nitrification, dominated by the Nitrosospira cluster 3 lineage of AOB, while chemical N fertilizer stimulated N2O production from denitrification, dominated by the nirK lineage of Rhizobiales. The study highlights the different effects of organic and chemical fertilizers on N2O microbial emission pathways in agricultural soils.
ECOLOGICAL INDICATORS
(2021)
Article
Environmental Sciences
Jiamin Chen, Jiawei Liang, Chenjing Li, Jihua Dai, Wenning Mai, Yongjun Wei
Summary: High ammonia concentration hinders efficient treatment of antibiotic production wastewater. In this study, an efficient AOB microbiota (named AF2) was obtained, which showed stable performance in a high-level salt environment and demonstrated great potential for future industrial wastewater treatment of APW.
Article
Ecology
Xiaoping Fan, Hao Chen, Guochao Yan, Mujun Ye, Chang Yin, Tingqiang Li, Steven A. Wakelin, Yongchao Liang
Summary: This study investigated the efficacy of nitrification inhibitors (NIs) and their effects on soil microbiota in different arable soils. The results showed that NI application suppressed the abundance of ammonia-oxidizing bacteria and increased the abundance of nosZI-N2O reducers. The efficacy of different NIs varied in different soils.
Article
Environmental Sciences
Xia Jia, Yunfeng Gao, Xiaodi Li, Yonghua Zhao, Lu Wang, Chunyan Zhang
Summary: This study investigated the impacts of elevated CO2 and cadmium levels on soil nitrification in the rhizosphere of Robinia pseudoacacia L. seedlings. The results showed that elevated CO2 combined with Cd pollution generally stimulated nitrification enzyme activities and influenced bacterial community structures.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Hao Su, Dachao Zhang, Philip Antwi, Longwen Xiao, Wuhui Luo, Xiaoyu Deng, Cheng Lai, Zuwen Liu, Miao Shi, Michael J. Manefield
Summary: This study revealed a hormesis condition in the PN batch assays upon La(III) dosage, where sludge stimulation at low La(III) dosage and inhibition at high-dose were observed. Techniques such as SEM-EDX, CLSM, and FTIR confirmed efficient removal of La(III) through biosorption and biosynthesis. The study also showed that La(III) significantly promoted the abundance of Nitrosomonas bacteria and identified Aquamicrobium as the ammonia oxidizing bacteria with high tolerance to La(III), providing insights into metabolic detoxification pathways against La(III) toxicity.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Green & Sustainable Science & Technology
Weifeng Deng, Litao Wang, Lang Cheng, Wenbo Yang, Dawen Gao
Summary: This paper reviewed the recent advances of anammox based processes for mature landfill leachate treatment and suggested some improvements to enhance the process efficiency.
Article
Environmental Sciences
Liuqing Yang, Gaodi Zhu, Xiaotang Ju, Rui Liu
Summary: The study found that soil pH significantly influenced the contribution of ammonia oxidizers to nitrification-related N2O emissions. In alkaline soil, AOB was the major microbial player contributing to N2O, while in acidic soil, AOA had a greater contribution.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Kaige Zhao, Tianyi Zhang, Yixing Tian, Haisong Li, Junfeng Wan, Yan Wang
Summary: In this study, the feasibility of partial nitrification process was investigated using a simultaneous fill/draw SBR system with inoculation of matured aerobic granular sludge. The system operated stably for 120 days with high efficiency in ammonium removal and nitrite accumulation. The presence of a hybrid flocs/granules system and effective suppression of nitrite-oxidizing bacteria were observed. Batch tests showed different specific ammonia oxidation rates for granules and flocs, and the microbial diversity analysis indicated the abundance of Nitrosomonas as a typical ammonia-oxidizing bacteria in both granules and flocs.
Article
Biotechnology & Applied Microbiology
Jinliang Xu, Qingjie Cui, Cuina Bu, Sherif Ismail, Shou-Qing Ni
Summary: This study evaluated the microbial community of different types of sludge in a full-scale sidestream partial nitrification-anammox plant to understand the separation mechanism of anammox and nitrifiers. Suspended sludge showed higher partial nitrification capacity while biofilm sludge had higher anammox activity. High-throughput results revealed that Nitrosomonas was the main active ammonia-oxidizing bacteria in suspended sludge, and Candidatus Brocadia had the highest abundance in biofilm sludge.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Environmental Sciences
Lenno van den Berg, Mario Pronk, Mark C. M. van Loosdrecht, Merle K. de Kreuk
Summary: This study compared four methods to measure the density of granular sludge in a full-scale plant treating domestic sewage, and assessed the effect of salinity on granule density. Most methods yielded reliable results, as long as the effect of salinity was considered.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Engineering, Environmental
V Kouba, D. Vejmelkova, E. Zwolsman, K. Hurkova, K. Navratilova, M. Laureni, P. Vodickova, T. Podzimek, J. Hajslova, M. Pabst, M. C. M. van Loosdrecht, J. Bartacek, P. Lipovova, D. G. Weissbrodt
Summary: This study compares the effect of gradual temperature decrease and cold shocks on the metabolic activity of anammox bacteria. The results show that cold shocks can significantly increase the activity of anammox bacteria and maintain the relative content of nitrogen respiration proteins. Cold shocks also induce the more efficient expression of potential cold shock proteins and contribute to the adaptation of anammox bacteria to low temperatures through changes in membrane lipid structure.
Article
Engineering, Environmental
Aina Soler-Jofra, Lisbeth Schmidtchen, Lluc Olmo, Mark C. M. van Loosdrecht, Julio Perez
Summary: This study investigates the short and long term impact of hydroxylamine on partial nitritation granular sludge. The results indicate that dissolved oxygen is the main factor determining the impact of hydroxylamine. Short term hydroxylamine feeding with low dissolved oxygen leads to higher hydroxylamine accumulation and N2O production, while long term hydroxylamine feeding reduces ammonium consumption rate.
Article
Engineering, Environmental
T. Prot, L. Korving, M. C. M. Van Loosdrecht
Summary: In a wastewater treatment plant, the composition of sludge streams in the liquid phase varies with time and place. This study aims to evaluate the potential for the formation of precipitates and equilibria for weak acids/bases by determining the ionic strength and chemical composition. Based on a literature review, the concentration ranges for the major constituents of the liquid phase in different streams are proposed, and the reasons for concentration evolution and exceptional cases are discussed. The ionic strength and the contribution of its constituents are calculated, and the utilization of ionic strength in literature is also examined.
WATER SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Environmental
Xenia Juan-Diaz, Julian Carrera, Julio Perez
Summary: This study explored the operating conditions involved in the development of autotrophic aerobic granular sludge. The results showed that enhancing ammonium oxidation activity in the early phase was crucial for the stable development of autotrophic aerobic granular sludge.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Review
Agricultural Engineering
Xingyu Chen, Yu-Jen Lee, Tian Yuan, Zhongfang Lei, Yasuhisa Adachi, Zhenya Zhang, Yuemei Lin, Mark C. M. van Loosdrecht
Summary: This review provides an overview of the current research and future directions in the recovery and utilization of high value-added biopolymers from conventional and advanced biological wastewater treatment systems. It discusses the recent developments in the understanding and functionality of extracellular biopolymers, as well as the factors influencing their yield, quality, and functionality. The review also explores potential practical applications of extracellular biopolymers and suggests research priorities for future prospects.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Vojtech Kouba, Kamila Hurkova, Klara Navratilova, Dana Kok, Andrea Benakova, Michele Laureni, Patricie Vodickova, Tomas Podzimek, Petra Lipovova, Laura van Niftrik, Jana Hajslova, Mark C. M. van Loosdrecht, David Gregory Weissbrodt, Jan Bartacek
Summary: In the study of the performance of anammox reactions under low-temperature conditions, membrane composition and cultivation temperature were found to be closely related to the activity of anammox biomasses. The adaptation of mesophilic cultures to low-temperature conditions may take several months or even up to 5 years. An interesting finding in these studies is that biomass enriched in the marine genus Candidatus Scalindua showed outstanding potential for nitrogen removal from cold streams.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Green & Sustainable Science & Technology
A. Culcasi, R. Ktori, A. Pellegrino, M. Rodriguez-Pascual, M. C. M. van Loosdrecht, A. Tamburini, A. Cipollina, D. Xevgenos, G. Micale
Summary: This paper proposes an innovative brine recovery system for obtaining high purity chemicals by integrating Eutectic Freeze Crystallization and Electrodialysis with Bipolar Membrane technologies. The experiments show that the integrated system effectively minimizes waste, promotes sustainability, and provides potential economic return.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Environmental
Laurence Strubbe, Edward J. H. van Dijk, Pascalle J. M. Deenekamp, Mark C. M. van Loosdrecht, Eveline I. P. Volcke
Summary: In the pursuit of reducing carbon footprint and energy costs, energy efficiency is crucial. This study focused on aerobic granular sludge reactors and found that they consume up to 50% less energy compared to conventional activated sludge systems. The study also investigated the dynamic behavior of the alpha factor and identified exchange ratio and temperature as the main influencing factors on its rate of increase during the aeration phase.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Sadiye Kosar, Onur Isik, Busra Cicekalan, Hazal Gulhan, Seyma Cingoz, Mustafa Yoruk, Hale Ozgun, Ismail Koyuncu, Mark C. M. van Loosdrecht, Mustafa Evren Ersahin
Summary: Achieving a neutral/positive energy balance without compromising discharge standards is a key goal in wastewater treatment plants. This study explores the coupling of high-rate activated sludge (HRAS) process with aerobic granular sludge (AGS) process as an energy-efficient pre-treatment option. The results show that feeding the AGS process with a mixture of HRAS process effluent and raw municipal wastewater can increase energy recovery potential and maintain high effluent quality.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Construction & Building Technology
Amir Tabakovic, Jeremy Lemmens, Jelmer Tamis, Dave van Vliet, Sayeda Nahar, Willem Suitela, Mark van Loosdrecht, Greet Leegwater
Summary: Bitumen is essential in asphalt pavements for its binding properties and ability to restore damage caused by traffic loading. With the decline in crude oil production, there is a need to find environmentally sustainable alternatives for bitumen modifiers. This paper investigates the potential use of the bio-based co-polymer PHBV as an alternative bitumen modifier and presents positive results from various tests.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Environmental
Navid Ahmadi, Mona Abbasi, Ali Torabian, Mark C. M. van Loosdrecht, Joel Ducoste
Summary: The transformation of four pharmaceuticals in a moving bed biofilm reactor was investigated under different COD/N ratios. Changes in the COD/N ratio influenced the competition between heterotrophic and nitrifying communities, resulting in shifts in microbial populations and composition in the biofilms. Autotrophic conditions exhibited higher transformation rates, indicating the importance of nitrification.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Materials Science, Characterization & Testing
Nam Kyeun Kim, Debes Bhattacharyya, Mark van Loosdrecht, Yuemei Lin
Summary: This research developed a bio-based flame retardant using a biopolymer derived from wastewater sludge to enhance the fire performance of polypropylene (PP). The study found that the extracellular polymeric substances (EPS) from wastewater sludge played a significant role in improving the char formation of PP composite. The incorporation of the bio-based flame retardant restricted the vertical burning characteristics of PP and improved its tensile moduli.
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)
