Article
Engineering, Environmental
Olga El Kik, Lea Issa, Krishna P. Katuri, Pascal E. Saikaly, Ibrahim Alameddine, Mutasem El-Fadel
Summary: This study developed a new configuration combining AnMBRs with MECs, which showed a shorter startup period, increased methane yield, and reduced membrane fouling. The AnFMBR-MEC had an average COD removal efficiency of 40% and displayed potential for Direct Interspecies Electron Transfer.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Yanhe Han, Chuantao Wu, Xiaolu Fu, Zhimin Su, Meili Liu
Summary: The study found that the internal circulation iron-carbon micro-electrolysis (ICE) is effective in removing sulfate from wastewater. Sulfate is mainly removed through reduction and flocculation and precipitation mechanisms.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Microbiology
Yeray Asensio, Maria Llorente, Alejandro Sanchez-Gomez, Carlos Manchon, Karina Boltes, Abraham Esteve-Nunez
Summary: The capacity of electroactive bacteria to exchange electrons with electroconductive materials has been explored for enhancing bioremediation of wastewater pollutants. By using a fluid-like electrode in a microbial electrochemical fluidized bed reactor, pharmaceutical pollutants like CBZ and SMX were efficiently removed. The performance of ME-FBR demonstrated the impact of selecting an anode potential for removing pollutants effectively.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Environmental Sciences
Maria Cristina Collivignarelli, Marco Baldi, Marco Carnevale Miino
Summary: Thermophilic biological fluidized bed reactor can reduce greenhouse gas emissions in wastewater treatment and minimize impact on the environment through reducing sludge production and energy consumption.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Zemin Li, Chaohai Wei, Ying Chen, Ben Chen, Guanglei Qiu, Jia Wan, Haizhen Wu, Shuang Zhu, Heng Zhao
Summary: The study utilized toxic compounds in coking wastewater to inhibit nitrite oxidizing bacteria, achieving stable nitritation. Results showed that controlling the organic loading rate and dissolved oxygen concentration can regulate the nitritation process, inhibiting NOB while preserving AOB activity.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Energy & Fuels
Hengjun Gai, Peiyi Yang, Qiang Zhang, Mengqi Lin, Hongbing Song, Meng Xiao, Tingting Huang, Quanhong Zhu
Summary: Circulating fluidized bed reactors are widely used in the energy industry for gas-solid reactions. They can be classified into two categories based on fluidization regimes: dilute-dense and dual-dense. The concept of dual-dense gas-solid circulating fluidization has not been well understood, hindering its commercial application. This review provides a detailed analysis of the dual-dense system, including mechanism, structural and operating parameters, particle circulation prediction, gas-solid flow simulation, and potential applications, while identifying existing controversies and unresolved issues.
Article
Engineering, Environmental
Van-Giang Le, Dai-Viet N. Vo, Nhat-Huy Nguyen, Yu-Jen Shih, Chi-Thanh Vu, Chih-Hsiang Liao, Yao-Hui Huang
Summary: This study successfully recovered and reused nitrogen and phosphorus from swine wastewater using fluidized-bed homogeneous granulation technology, achieving high recovery efficiency and purity. Under certain conditions, the optimal up-flow velocity and magnesium concentration significantly affect the recovery efficiency and crystal size.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Mengyao Hu, Tianlie Luo, Qiulin Li, Yifei Xie, Guo Liu, Liujin Wang, Willie J. G. M. Peijnenburg
Summary: This study investigated the nitrogen removal performance and underlying mechanisms of a micro-electrolysis combined with biological denitrification (MEBD) system using an iron-carbon micro-electrolysis carrier. The results showed that the optimal denitrification effect for low C/N wastewater was achieved at specific conditions, and the addition of iron-carbon filler changed the microbial community structure and identified a new denitrifying bacteria. These findings provide theoretical and technical support for the nitrogen remediation of low C/N sewage.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Environmental Sciences
Jinlong Gao, Yifan Chen, Jiwei Li, Yalin Yu, Jun Wang, Tiantian Pang, Yuting Qi, Jingge Shang, Qianjiahua Liao
Summary: This study investigated the treatment of 100-mg/L Norfloxacin (NOR) wastewater containing high concentrations of sulfate through a combination of electrolysis, sulfate-reducing up-flow sludge bed (SRUSB), and biological contact oxidation reactor (BCOR) treatments. The results showed that electrolysis transformed most of the NOR, while SRUSB and BCOR played important roles in degrading TOC and SO42? contents. Sulfate-reducing bacteria and sulfate-oxidizing bacteria were crucial in carbon chain oxidation and benzene ring opening during the treatment process.
ENVIRONMENTAL RESEARCH
(2021)
Article
Biotechnology & Applied Microbiology
Yanjie Niu, Xinmin Liu, Lingyun Wang, Qingjie Guo, Jianjun Wu
Summary: The coal chemical wastewater (CCW) was treated by anaerobic fluidized bed microbial fuel cell (AFB-MFC) using macroporous adsorptive resin (MAR) as the fluidized particle. Isosteric heat calculation and molecular dynamics simulation were conducted to study the interaction between organic compounds in CCW and MAR. The results showed that MAR had the highest adsorption heat and diffusion coefficient for m-cresol, which were verified by experimental adsorption kinetics. Microbial community analysis revealed the dominant bacteria in the activated sludge of CCW-fed MFC, and their synergistic cooperation contributed to the degradation of CCW and power generation of the MFC. Intermediate products of m-cresol and phenol degradation were detected and the degradation pathway of organic matter in CCW was predicted.
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2022)
Article
Agricultural Engineering
Hui Ge, Liqiang Yu, Zhaobo Chen, Zhiguo Liu, Hongxia Liu, Dongxue Hu, Hongcheng Wang, Yubo Cui, Wanjun Zhang, Xuejun Zou, Ying Zhang
Summary: In this study, the TVDBFB showed higher nitrogen removal efficiency, specific nitrification and denitrification rates compared to the AO process at different temperatures, with a smaller footprint. Factors such as alkalinity/NH4+-N, BOD5/TN, and temperature play important roles in the compliance rate. Increasing the carrier packing rate has emerged as a new strategy for enhancing compliance rate.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Chemical
Yangfan Song, Xinxin Wang, Yaling Liu, Hongwei Chen, Chao Zhao, Libin Liu, Hejia Jiang, Lou Zhu, Tianchao Ai
Summary: A novel type of pulsed anaerobic fluidized bed microbial fuel cell (PAFB-MFC) was studied, which showed better electrochemical performance and shorter wastewater treatment time compared to the conventional anaerobic fluidized bed microbial fuel cell (AFB-MFC).
Article
Environmental Sciences
Michael J. Nelson, George Nakhla, Jesse Zhu
Summary: Emerging technologies for wastewater treatment face challenges in proving their cost competitiveness due to lack of costing data. The circulating fluidized bed bioreactor has shown effectiveness in lab and pilot scale, but has not been widely adopted. Simulation calculations indicate that CFBBR has lower costs at low flows and comparable costs at high flows compared to conventional processes, with significant environmental advantages.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Chemical
Jiantao Li, Xiuying Yao, Lu Liu, Xudong Zhong, Chunxi Lu
Summary: An experimental setup was constructed to study the bed-to-wall heat transfer in a gas-solid fluidized bed with external solids circulation. It was found that gas velocity affects bubble properties, and external solids circulation can improve heat transfer efficiency, with packet residence time playing a crucial role in the process.
Article
Engineering, Chemical
Bo Lv, Xiaoman Chai, Xiaowei Deng, Feishuo Jiao, Chaojun Fang, Baolin Xing
Summary: In this study, the density segregation process and mechanism of coking middling particles in a liquid-solid fluidized bed are investigated using numerical simulation and experimental methods. The results reveal that the density segregation process of coking middling particles is divided into the falling outer ring and the rising inner ring. The ash distribution variance of coking middling particles shows a trend of first increasing and then decreasing with the increase of operating parameters. Furthermore, the study demonstrates the efficient separation of coking middling particles in the liquid-solid fluidized bed, as evidenced by the enriched cleaned coal product with a high yield and low ash content.
Article
Engineering, Environmental
Francisco de Borja Ojembarrena, Elena Fuente, Angeles Blanco, Carlos Negro
Summary: Accumulation of Cr(VI) in industrial fiber cement process water can affect product quality and health, and it needs to be removed to avoid environmental risks. The study found that cationic cellulose nanocrystals (CCNCs) have higher adsorption efficiency and lower cost compared to conventional adsorbents.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Review
Engineering, Environmental
Shentan Liu, Yangchen Zhang, Xiaojuan Feng, Sang-Hyun Pyo
Summary: This paper summarizes the common problems of constructed wetlands (CWs) and proposes corresponding optimized solutions, including thermal insulation and additional aeration in cold climates, choosing suitable plant species and planting patterns to enhance phytoremediation in CWs, using various methods to monitor and evaluate CW clogging, implementing anti-clogging measures, controlling greenhouse gas emissions during CW treatment, constructing and utilizing CW databases, designing appropriate CW types, and implementing strict technical management and supervision.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Norzila Mohd, Nazlina Haiza Mohd Yasin, Wan Hasnidah Wan Osman, Mohd Sobri Takriff
Summary: This study demonstrates that Chlamydomonas sp. is effective in removing nutrients from palm oil mill effluent and shows particular efficiency in the removal of ammonium and phosphate.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Mingzhen Zhang, Guijian Liu, Ruijia Liu, Jinzhao Xu, Wen Si, Yong Wei
Summary: Tieguanyin tea stem was used to synthesize modified biochar for the adsorption of copper and zinc. Among the modified biochar, Fe-BCs had the highest adsorption capacity, with Fe-BC650 being the best adsorbent. It reached adsorption equilibrium in 1 minute and had a maximum adsorption capacity of 303.5996 mg/g for Cu (II) and 254.0711 mg/g for Zn (II) in single-metal solutions. However, there were antagonistic impacts between Cu2+ and Zn2+.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Lingling Zhao, Qiaoshu Zhou, Yun Yang, Yuan Zhang, Yewei Qiu, Yanjun Chen, Xian Jin, Xiangjun Yang, Shixiong Wang
Summary: This research presents a method for selectively recovering gold from e-waste water using metal sulfides microspheres prepared by hydrothermal technique. The results show that the assistance of visible light significantly improves the gold adsorption performance of metal sulfides. The metal sulfides exhibit excellent gold adsorption properties, high selectivity, ultra-high adsorption capacity, and good recyclability.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Laishram Saya, W. Rameshwor Singh, Sunita Hooda
Summary: Organic-inorganic nanoblends, such as polysaccharide-blended-inorganic ones, have versatile applications and have gained significant research attention. In this study, a magnetic guar gum/graphene oxide nanocomposite blended with CuO was successfully prepared and investigated for its adsorption capacity for ciprofloxacin removal. The results showed that the nanocomposite exhibited excellent adsorption capacity and the adsorption process was spontaneous.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Umit Ecer, Sakir Yilmaz
Summary: A novel and effective catalyst Co@MIL-68(Fe)@Fe3O4@CM-BC was synthesized and used for the catalytic reduction of crystal violet in aqueous environments. The catalyst showed high efficiency in degrading crystal violet under specific conditions, and exhibited good regeneration performance.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Chi Zhang, Miao Zhang, Haohan Yang, Wei Cai, Jun Wu
Summary: Enhancing the bioaugmentation of common nitrifiers in the partial nitrification/anammox process can decrease the activity of nitrite oxidizing bacteria and increase the activity of anammox bacteria, leading to improved total nitrogen removal efficiency.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Runzhang Zuo, Dajun Ren, Yangfan Deng, Canhui Song, Yubin Yu, Xiejuan Lu, Feixiang Zan, Xiaohui Wu
Summary: This study found that fine bubble aeration in membrane bioreactors (MBR) can better control membrane fouling and reduce energy consumption. However, compared to fine bubble aeration, coarse bubble aeration released more proteins and polysaccharides, resulting in a decrease in functional bacteria and enzymes involved in nitrogen and phosphorus pathways.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Ch Tahir Mehmood, Jiekai Dai, Hanjun Zhao, Ziyi Zhong
Summary: Wirelessly powered photocatalyst-coated spheres (WPS) have been developed and demonstrated for various applications, including photodegradation and fouling control. These WPS are cost-effective, easy to fabricate, and have excellent visible light sources, making them suitable as carriers for photocatalysts.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Yifan Wang, Xiaoxuan Kang, Yuting Li, Ruyi Li, Chang Wu, Luyao Wang, Chongqing Wang, Tao Yang, Ming Ge, Zhangxing He
Summary: Cobalt/carbon nanofibers (Co/CNF) were prepared and exhibited excellent catalytic activity in the degradation of tetracycline by activating peroxodisulfate (PDS). The effects of process parameters on tetracycline removal were studied, and the reaction mechanism was confirmed through experiments.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Ting Wei, Yaqian Zhao, Jia Guo, Bin Ji, Alvaro Pun Garcia, Abraham Esteve Nunez
Summary: This study developed a novel lightweight substrate (Al-NLS) composed of aluminum sludge and polyurethane, and investigated its effectiveness in constructed wetlands (CWs). Results showed that Al-NLS had favorable adsorption capacities for phosphorus and removal efficiencies for pollutants in real domestic wastewater. It also positively influenced the microbial community. Therefore, Al-NLS can be considered as a new alternative substrate in CWs technology.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Dabojani Das, Achinta Bordoloi, Heyang Yuan, Daniel J. Caldwell, Rominder P. S. Suri
Summary: This study evaluates the degradation kinetics of antibiotic resistance genes and mobile genetic elements in water matrices by ozone treatment. The results show that extracellular antibiotic resistance genes can be effectively removed, while intracellular genes are more resistant to degradation. The impact of wastewater matrix on gene degradation is minimal.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
