Article
Environmental Sciences
Xin Jin, Lei Zhang, Mengwen Liu, Shiyi Hu, Zhuodi Yao, Jingwen Liang, Rui Wang, Lu Xu, Xuan Shi, Xue Bai, Pengkang Jin, Xiaochang C. Wang
Summary: Working fluid preparation using treated drilling wastewater has great potential for reuse in water-deficient and ecologically fragile areas. The dissolved ozone flotation (DOF) process was found to be more effective than the original electrocatalytic system (ECS) in removing organic matter and suspended solids. The DOF process also improved the performance of the subsequent reverse osmosis (RO) system, resulting in lower fouling potential and higher water production rate.
Article
Environmental Sciences
Zeming Xie, Jiali Shentu, Yuyang Long, Dongsheng Shen, Shengqi Qi
Summary: This paper investigated the effect of coexisted dissolved organic matter (DOM) on the oxidation efficiency of toluene by ozone micro-nano bubble water (OMBW) and ozonated water (OW) through batch experiments. The results showed that coexisted DOM had a significant inhibition effect on the toluene oxidation rate by OMBW, leading to a similar oxidation rate between OMBW and OW. This was mainly due to the decreased reaction rate between toluene and hydroxyl radical in OMBW after the introduction of DOM, which competed for the adsorption sites on the micro-nano bubble interface.
Review
Engineering, Environmental
Shuan Liu, Haojie Ding, Yunqian Song, Yinghao Xue, Mohan Bi, Meirou Wu, Chun Zhao, Min Wang, Jun Shi, Huiping Deng
Summary: Micro-nanoplastics (M-NPs) are a critical environmental issue due to their easy migration, bioaccumulation with toxic effects, and resistance to degradation. Current technologies for removing or degrading M-NPs in drinking water are insufficient, and the residual M-NPs in drinking water pose a threat to human health. This paper comprehensively summarizes the negative impacts of commonly used disinfection processes (ozone, chlorine, and UV) on M-NPs, including their potential leaching of dissolved organics and the production of disinfection byproducts. Moreover, the adverse effects of M-NPs after disinfection may exceed those of conventional organics. Enhancing conventional drinking water treatment processes, detecting residual M-NPs, and conducting biotoxicological assessment are proposed as promising and eco-friendly solutions.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Chemical
Bert Swart, Y. M. John Chew, Jannis Wenk
Summary: Dissolved air flotation (DAF) is an important water treatment process for removing suspended solids. This study constructed a continuously operating lab scale DAF tank to simultaneously monitor the size distributions and motions of microbubbles and microplastic particles. The addition of salt greatly reduced the particle counts during flotation. This new approach provides critical insights into the variations in DAF performance.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Engineering, Environmental
Yunxian Liu, Bing Wang, Dan Zhao, Wenhui Jin, Feng Xu, Yujia Gao, Wen Shi, Hongyang Ren
Summary: This study investigates the effect of surfactants on the behavior of ozone bubbles in water and their impact on ozone mass transfer efficiency. It was found that the addition of surfactants influenced the size, shape, and trajectory of ozone bubbles. Different surfactants had varying effects on ozone mass transfer, with nonionic and anionic surfactants inhibiting ozone mass transfer, while low concentrations of a cationic surfactant enhanced it. The study also observed changes in gas-liquid interface area and liquid phase mass transfer coefficient due to the addition of surfactants.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Dong Wan, Jie Wang, Tong Chen, Weiming Xiang, Steplinpaulselvin Selvinsimpson, Yong Chen
Summary: This study investigates the impact of chlorine, UV254, and ozone disinfection processes on the photosensitized degradation of contaminants. The results show that disinfection processes significantly alter the formation rate of photoinduced reactive species (RS) from dissolved organic matter (DOM) and increase the photodegradation rate constants (k(obs)) of contaminants.
Article
Engineering, Environmental
Linghui Wei, Meng Li, Feng Gao, Yibo Zhang, Chengwei Li, Qian Zhang
Summary: Traditional air flotation devices are not effective in treating emulsified wastewater. This study presents a new integrated sequential air flotation device and uses two different demulsifiers to improve the demulsification effect. Optimal operating conditions were determined through experiments and the demulsification mechanism was investigated. The device showed significant improvement in COD removal efficiency in practical wastewater treatment.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Environmental Sciences
Nirmal Kumar Shahi, Minsoo Maeng, Donghyun Kim, Taehoon Lee, Seok Dockko
Summary: The study compared the efficiency of dissolved air flotation (DAF) and low-energy flash-pressurized flotation (FPF) in a pilot plant based on organic precursors, different molecular weight fractions, and disinfection byproduct reduction. Both DAF and FPF showed similar removal of dissolved organic carbon (DOC) and chromatographic DOC, but exhibited differences in the removal tendency of organic fractions with different molecular weights. DAF was found to have higher removal of low molecular weight acids compared to FPF, while FPF had a lower energy consumption of approximately 55% compared to DAF.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Review
Engineering, Chemical
Nalaka Rajapakse, Masoumeh Zargar, Tushar Sen, Mehdi Khiadani
Summary: Microbubble aided clarification is widely used in many industries due to its high efficiency and compact unit size. Dissolved air flotation (DAF) is the most common method for generating microbubbles. Various physicochemical parameters of the influent can have significant impacts on the performance of DAF units. This article reviews the effects of viscosity, salinity, temperature, pH, zeta potential, surface tension, solid content, particle size, and hydraulic loading rate on air dissolution, bubble size distribution, and bubble rise velocity. The findings provide important insights for the design and operation of DAF units to improve separation efficiencies.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Review
Engineering, Multidisciplinary
Marwa A. Sakr, Mohamed M. A. Mohamed, Munjed A. Maraqa, Mohamed A. Hamouda, Ashraf Aly Hassan, Jafar Ali, Jinho Jung
Summary: This review examines the advantages of using micro-nano bubble (MNB) technology in wastewater treatment, including performance differences among bubble types, removal of target pollutants, bubble characterization techniques, and the impact of bubble size on treatment efficiency. Various applications of MNBs are also explored.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Karim-Alexandre Essaied, Lucy Victoria Brown, Urs von Gunten
Summary: The composition of oxidant-reactive dissolved organic nitrogen (DON) is still not well characterized, but may form a variety of disinfection by-products containing nitrogen-oxygen bonds. Through oxidation and batch experiments, it was found that some amino acids have a high tendency to form nitrate (NO3), while other compounds have lower capabilities to form nitrate and chloramines.
Article
Engineering, Environmental
Zeyuan Yang, Peng Liu, Jian Wang, Ling Ding, Luqi Li, Hanzhong Jia, Tiecheng Wang, Xuetao Guo, Shixiang Gao
Summary: This study investigated the effects and mechanisms of dissolved organic matter (DOM) derived from microplastics (MP-DOM) on the photodegradation of sulfamethazine (SMT) during UV disinfection. Results showed that MP-DOM accelerated the photodegradation of SMT by generating reactive oxygen species (ROS) through its photosensitizing properties. The production of ROS varied depending on the components of DOM.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Nathalia Santos Araujo, Nathalia Ferreira Souza, Joao Marcos de Lima-Faria, Andressa Tuane Santana Paz, Paulo Sergio Scalize, Simone Maria Teixeira de Saboia-Morais, Humberto Carlos Ruggeri Junior, Edemilson Cardoso da Conceicao
Summary: The study demonstrated that Moringa oleifera Lam. extract has the potential to reduce turbidity, COD, and oil and grease content in wastewater, with lower toxicity compared to aluminum sulfate. It could serve as a sustainable alternative for the treatment of effluents from the cosmetic industry.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Tingting Xiao, Lingjun Zhang, Sisi Chen, Xiaohu Dai, Bin Dong
Summary: This study investigated the thickening performance of sludge using dissolved ozone flotation (DOF). The results showed that DOF can change the surface properties of sludge, destroy the floc structure, release organic matter, and increase moisture fluidity. The key influencing factors were found to be surface properties, protein structure, and moisture distribution.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Tarek Manasfi, Joanna Houska, Isabelle Gebhardt, Urs von Gunten
Summary: Ozonation of natural waters leads to the formation of carbonyl compounds, which are a main class of disinfection byproducts. However, their detection in water and wastewater is difficult due to their physicochemical properties. A non-target screening method was developed to identify carbonyl compounds using a derivatisation technique and mass spectrometry. The method was applied to investigate carbonyl compound formation during ozonation of different water types. Eight target carbonyl compounds were consistently detected, with different compounds showing varying formation trends. The results highlight the importance of biological post-treatment for the removal of carbonyl compounds.
Article
Engineering, Chemical
Arvin Sohrabi, Mousa Meratizaman, Shuli Liu
Summary: This paper simulates and discusses possible solutions to improve the economic and technical performances of a battery-less renewable energy-powered BWRO system under real climate conditions. The study finds that the photovoltaic-based system performs better in terms of specific energy consumption and unused energy ratio.
Article
Engineering, Chemical
Chunlan Pan, Xiaoyin Hu, Vishal Goyal, Theyab R. Alsenani, Salem Alkhalaf, Tamim Alkhalifah, Fahad Alturise, Hamad Almujibah, H. Elhosiny Ali
Summary: This paper introduces a novel waste heat recovery method using the hot flue gas from a ship's engine to produce liquefied hydrogen while meeting the ship's air-conditioning requirement. A comprehensive feasibility assessment is conducted and an artificial neural network with a multiobjective grey wolf optimization method is used for optimization. The findings indicate the highest mean sensitivity index of the flash temperature and the best optimization scenario for exergy efficiency, CO2 emission reduction, and liquefied hydrogen cost.
Article
Engineering, Chemical
Daniele Chinello, Jan Post, Louis C. P. M. de Smet
Summary: In this study, PVDF-based anion-exchange membranes were designed to selectively separate nitrate from chloride. Experimental data showed that increasing the concentration of PVDF enhanced nitrate transport but also increased the membrane electrical resistance. The selectivity of nitrate was found to be independent of the membrane thickness and mainly driven by the increased affinity between the anion and the membrane.
Article
Engineering, Chemical
Umar Noor, Muhammad Fayyaz Farid, Ammara Sharif, Amna Saleem, Zubair Nabi, Muhammad Furqan Mughal, Kiran Abbas, Toheed Ahmed
Summary: Global water scarcity is increasing, and water desalination is an important solution. Multifunctional advanced materials, such as membrane materials and solar-driven desalination, play a crucial role in water desalination. Additionally, these materials can be used for water purification, wastewater treatment, and pollutant elimination.
Article
Engineering, Chemical
Emrah Gumus
Summary: With growing global concerns about climate change and environmental impacts, the use of nuclear energy in naval vessels offers a cleaner and more efficient solution to reduce emissions and address water and energy supply challenges. This study explores a novel system that combines a nuclear-driven supercritical carbon dioxide power cycle with reverse osmosis cogeneration to meet the water and electricity demands in maritime operations, enhancing the sustainability, efficiency, and self-sufficiency of naval vessels. The results indicate that the system has the potential to be a viable and effective solution for naval operations.
Article
Engineering, Chemical
Dao Thi Thanh Huyen, Saikat Sinha Ray, Young -Nam Kwon
Summary: This study focuses on the modification of a commercially available polyamide thin-film composite membrane with a zwitterionic material to enhance its fouling resistance. The modified membrane shows improved salt rejection and reduced permeability compared to the pristine membrane. Fouling tests demonstrate that the modified membrane has a lower fouling ratio and higher recovery ratio. The enhanced antifouling characteristics are attributed to the improved hydrophilicity resulting from the zwitterionic brushes and the salting-in effect.
Article
Engineering, Chemical
Niklas Koeller, Lukas Mankertz, Selina Finger, Christian J. Linnartz, Matthias Wessling
Summary: This study presents a methodology to scale up Flow-electrode Capacitive Deionization (FCDI) technology from lab-scale to pilot-scale systems. By increasing membrane area and using a stacking approach, the FCDI modules were successfully scaled up and achieved a salt transfer rate comparable to lab-scale systems. This provides a foundation for future assessments of energy demand and economics.
Article
Engineering, Chemical
Mona Gulied, Sifani Zavahir, Tasneem Elmakki, Hyunwoong Park, Guillermo Hijos Gago, Ho Kyong Shon, Dong Suk Han
Summary: This study introduces a novel hybrid system that combines direct contact membrane distillation (DCMD) and electrically switched ion exchange (ESIX) to facilitate seawater reverse osmosis (SWRO) brine enrichment and selective lithium recovery.
Article
Engineering, Chemical
Zhiqiang Zhang, Ruifeng Deng, Jiao Zhang, Lu She, Guangfeng Wei, Renyong Jia, Pengyu Xiang, Siqing Xia
Summary: A transmembrane electro-chemisorption system with authigenic acid and base was developed for enhancing ammonia recovery from strong ammonia wastewater. The system efficiently transformed ammonium into free ammonia, which was then adsorbed and recovered through transmembrane chemisorption. This system yielded pure (NH4)2SO4 product and produced valuable byproducts of pure hydrogen and oxygen. Higher applied voltage resulted in better ammonia recovery.
Article
Engineering, Chemical
Alena Popova, Sandrine Boivin, Takuji Shintani, Takahiro Fujioka
Summary: This study aimed to produce a high-integrity RO membrane by forming a polyamide skin layer on a TE support layer, in order to enhance the integrity of the membrane and improve the microbiological safety of potable water reuse.
Article
Engineering, Chemical
Sanjana Yagnambhatt, Saber Khanmohammadi, Jonathan Maisonneuve
Summary: This study investigates the concept of using heat to enhance reverse osmosis (RO) desalination. The effect of temperature on water permeate flux, specific energy, permeate quality, and applied operating pressures is evaluated using an analytical model. The results suggest that under specific conditions, the tradeoff between savings in mechanical pump work and thermal energy input in thermally-enhanced RO can be favorable, leading to overall energy savings.
Article
Engineering, Chemical
Jiangju Si, Chenrui Xue, Shun Li, Linchao Yang, Weiwei Li, Jie Yang, Jihong Lan, Ningbo Sun
Summary: To meet the huge demand for lithium resources, there is an urgent need to develop a new efficient technology for lithium recovery from salt-lake brines. In this study, a selective membrane capacitive deionization system is reported, which achieves high lithium recovery capacity and rate through the use of materials with efficient intercalated pseudo-capacitance and a high specific area porous carbon. The use of a modified thin-coated membrane allows for selective Li+ recovery, and adjusting the concentrations of Li+ and Mg2+ in the feed solution enables higher Li+/Mg2+ selectivity.
Article
Engineering, Chemical
Mohamed R. Salem, R. Y. Sakr, Ghazy M. R. Assassa, Omar A. Aly
Summary: This research proposes a new method of using wasted thermal energies as an additional heating source for solar still distillation units (SSDUs) to increase productivity and reduce pollution and global warming. By testing two SSDUs, the study shows that heating airflow can raise temperatures, enhance freshwater production, and improve system thermal efficiency.
Article
Engineering, Chemical
Qimeng Sun, Miao Sun, Linyan Yang, Yuan Gao, Xinghai Zhou, Lihua Lyu, Chunyan Wei
Summary: This study presents an innovative design and fabrication of a fabric-based conical roll (FCR) evaporator, which enables low-temperature evaporation and achieves high evaporation efficiency with excellent thermal management ability. The evaporator has demonstrated advanced light-harvesting capability and can produce freshwater that meets drinking water standards, showing great potential for applications in desalination and sewage treatment.
Article
Engineering, Chemical
Yidong Zhang, Wangfang Deng, Meiyan Wu, Chao Liu, Guang Yu, Qiu Cui, Pedram Fatehi, Chunlin Xu, Bin Li
Summary: In this study, a novel polydopamine-functionalized lignin-containing pulp foam evaporator with high-efficiency desalination and multi-contaminant adsorption capabilities was designed. The foam evaporator showed excellent light absorption, water absorption, thermal conductivity, and chelation abilities, allowing for solar evaporation and contaminant adsorption synergistically. It also exhibited potential applications in metal ion concentration and contaminated seawater treatments, and demonstrated superior biodegradability compared to poly-styrene foam. This foam material holds promise for developing multifunctional photo-thermal systems for solar-driven water purification.