Article
Engineering, Environmental
Sung Ju Im, Luca Fortunato, Am Jang
Summary: This study monitored the development of fouling on the FO membrane surface in real time and assessed the physical and chemical characteristics of the fouling layer through performance evaluation and in-depth analysis. The fouling development was classified into 4 phases: virgin performance, initial deposition, stabilization, and aggregation. With the growing fouling layer and with aggregation, the removal rate of organic matter decreased while the removal rate of inorganic matter remained high.
Review
Agricultural Engineering
Andrew Kim, Jong Hak Kim, Rajkumar Patel
Summary: This review focuses on composite membranes used for wastewater treatment, specifically the antibiofouling properties of these membranes. The use of carbon-based nanomaterials, such as graphene and carbon quantum dots, as nanofillers in the membrane, along with functionalization or compositing with other materials, enhances the bactericidal ability of the membranes and reduces biofilm adhesion, while improving water permeance and salt/dye rejection.
BIORESOURCE TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Ankush Agrawal, Ankita Sharma, Kumud Kant Awasthi, Anjali Awasthi
Summary: One of the major challenges today is the treatment of polluted wastewater, and membrane technology has been widely used due to its high removal power, selectivity, and permeability. Traditional wastewater treatment methods are costly, and the use of metal oxide nanomaterials in polymer nanocomposite membranes may offer a more effective solution.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Environmental Sciences
Ricardo Zamora, John McEvoy, Christopher Colbert, Jaime Chacana Olivares, Puangrat Kaewlom, Eakalak Khan
Summary: Membrane bioreactors (MBRs) face high costs due to biofouling, which is caused by the binding of adhesins on microbial appendages to the surface. Two compounds, dodecyl-8-D-maltoside (DDM) and methyl alpha-D-mannopyranoside (Me alpha Man), were investigated as potential biofilm mitigation tools. DDM prevented biofilm formation in microplate experiments, while Me alpha Man increased biofilm. In a biofilm reactor setting, DDM prevented detectable wastewater culture biofilm formation on different membrane materials. The mechanism of anti-adhesion involved the binding of DDM to polar amino acids on microbial appendages.
Article
Agricultural Engineering
Nguyen Cong Nguyen, Hau Thi Nguyen, Hung Cong Duong, Shiao-Shing Chen, Huy Quang Le, Chinh Cong Duong, Le Thuy Trang, Chih-Kuei Chen, Phuoc Dan Nguyen, Xuan Thanh Bui, Wenshan Guo, Huu Hao Ngo
Summary: The study developed a Dynamic-OsMBR/NF system for municipal wastewater treatment and reuse, which significantly reduced membrane fouling and achieved high water quality for reuse. By utilizing a continuously rotating FO module and an innovative draw solution, the system demonstrated excellent performance in pollutant removal efficiency.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Chemical
Xing Du, Zhitian Peng, Caijing Lai, Mengyao Xiao, Yang Yang, Xianhui Li
Summary: This study assessed the potential damage to polyamide membranes during an electro-oxidation process by evaluating the performance of NF90 nanofiltration membrane after exposure to chlorinated secondary wastewater. It was found that the retention of Ca2+ and Mg2+ by the NF membrane decreased by 90% at high concentration of chloramine. Additionally, the presence of a biofouling layer on the NF membrane prevented any changes in the chemical structure and compositions when exposed to chloramine-containing wastewater.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Environmental Sciences
Mengchang Xu, Wenhu Zhou, Xuncai Chen, Ying Zhou, Binsheng He, Songwen Tan
Summary: Wastewaters containing disinfectants, such as NaClO, can be effectively treated in a saline MBBR-MBR system with marine microorganisms. Low concentrations of NaCl can impact bioactivity and lead to membrane biofouling. The highest removal efficiencies for COD and NH3-N were observed at a salinity of 30 g/L in marine bioreactors.
Article
Environmental Sciences
Hanyong Zhang, Wenhu Zhou, Xuehui Zhan, Zhenxing Chi, Weiguo Li, Binsheng He, Songwen Tan
Summary: This study developed a halophilic biocarrier-MBR for treating saline pharmaceutical wastewaters. The system performed well at low ampicillin concentrations but showed decreased performance at high concentrations.
Article
Engineering, Chemical
Lei Cao, Yufeng Zhang, Lei Ni, Xianshe Feng
Summary: A novel nanofiltration membrane bioreactor (NF-MBR) was constructed by integrating a loosely structured nanofiltration hollow fiber membrane into an aerobic activated sludge system. The loose NF membrane showed high permeability and achieved higher removal efficiency of CODCr and DOC compared to the conventional ultrafiltration membrane bioreactor (UF-MBR). The fouling mechanism analysis revealed that reversible cake fouling was dominant and the small pore size of NF membrane mitigated irreversible pore blockage. The energy consumption of NF-MBR was comparable to UF-MBR. This study demonstrates the potential of loose NF membrane bioreactor as an advanced process for wastewater treatment.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Environmental
Sung-Joon Park, Myung-Seok Lee, Wansuk Choi, Jung-Hyun Lee
Summary: A new facile strategy was presented for the fabrication of anti-biofouling polyamide thin film composite membranes by incorporating benzalkonium chloride (BAC) during interfacial polymerization. The BAC-incorporated TFC membrane exhibited significantly enhanced reverse osmosis separation and anti-biofouling performance. Strong incorporation of BAC into PA led to the long-term durability of the membrane in terms of its separation and anti-biofouling performance.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Xing Du, Ziyang Li, Zhitian Peng, Zhong Zhang, Mengyao Xiao, Zhihong Wang, Yang Yang, Xianhui Li
Summary: This study applied the electro-oxidation process using boron-doped diamond anodes to treat the concentrate from nanofiltration membrane in order to remove organic contaminants and nutrients. The in-situ generation of chloramines during the process effectively alleviated membrane biofouling and maintained a stable permeate flux. The results suggest that the combination of nanofiltration and electro-oxidation processes is a promising strategy for sustainable reuse of wastewater.
ENVIRONMENTAL POLLUTION
(2023)
Article
Engineering, Environmental
Libing Zheng, Chun Zhang, Sai Kang, Chenlu Li, Deyin Hou, Shanghua Wu, Jun Wang, Yuansong Wei
Summary: This study reveals the process of microbial succession and biofouling formation in membrane distillation, providing in-depth information to fill the knowledge gap of MD biofouling.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Biotechnology & Applied Microbiology
Benjamin Tuck, Nadia Leinecker, Elizabeth Watkin, Anthony Somers, Maria Forsyth, Laura L. Machuca
Summary: In natural environments, microorganisms form biofilms on surfaces, which can lead to biofouling and microbiologically influenced corrosion. The heterogeneity of species in natural systems allows for higher tolerance to adverse conditions compared to laboratory simulations. However, current chemical treatments for biofilms are dangerous and face international restrictions. To address this, a multi-functional compound called CTA-4OHcinn has been developed to combat both corrosion and biofilm formation. This study demonstrates that CTA-4OHcinn is effective in reducing the viability of mature biofilms and targets the cell membrane, making it a true multi-functional organic corrosion inhibitor.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Engineering, Chemical
Xiaoli Su, Xiaochi Feng, Mingming Wang, Zi Song, Wenyi Dong, Xiaoying Li, Nanqi Ren, Feiyun Sun
Summary: Biofouling deteriorates water quality and reduces membrane lifespan. This study reveals the mechanism of biofouling and proposes an effective strategy to mitigate biofouling by improving initial anti-attachment and reducing extracellular matrix content.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Environmental
M. Abd Elkodous, Gharieb S. El-Sayyad, M. I. A. Abdel Maksoud, Rajesh Kumar, Keiichiro Maegawa, Go Kawamura, Wai Kian Tan, Atsunori Matsuda
Summary: In this study, a composite matrix incorporating carbon nanomaterials was prepared to effectively remove chloramine-T from water with a removal efficiency of 65%.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Review
Environmental Sciences
Hai Duc Minh Tran, Sandrine Boivin, Hitoshi Kodamatani, Keisuke Ikehata, Takahiro Fujioka
Summary: The study compared the effectiveness of UV lamps with different wavelengths in eliminating pathogens and CECs in water, finding that the combined use of 222 nm KrCl or 185 + 254 nm LP-Hg lamps with H2O2 is the best option for achieving target removal levels of both pathogens and CECs in potable water reuse.
Article
Environmental Sciences
My Thi Tra Ngo, Binh Quoc Diep, Hideaki Sano, Yasuhisa Nishimura, Sandrine Boivin, Hitoshi Kodamatani, Haruka Takeuchi, Satya Candra Wibawa Sakti, Takahiro Fujioka
Summary: Membrane distillation showed low membrane fouling and high removal efficiency of dissolved ions during water recycling, but had low rejection for certain specific compounds and may require post-treatment. Reverse osmosis, on the other hand, exhibited better performance in removing specific compounds but had a higher risk of membrane fouling.
Article
Engineering, Environmental
Takahiro Fujioka, Sandrine Boivin, Haruka Takeuchi
Summary: The study developed an NF membrane-based pre-treatment system to remove interfering substances from treated wastewater for online analysis. Results showed that the system effectively removed interfering substances while maintaining bromate ion concentration, demonstrating the potential utility for continuous monitoring of bromate ion formation rate.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2022)
Correction
Engineering, Environmental
Shannon L. Roback, Hitoshi Kodamatani, Takahiro Fujioka, Megan H. Plumlee
Summary: The study provides a correction for the validation of a novel direct-injection chemiluminescence-based method for N-nitrosamine analysis in advanced-treated recycled water, drinking water, and wastewater. The results of this study are important for assessing and monitoring N-nitrosamine levels in water resources.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Satya Candra Wibawa Sakti, Nindayu Indrasari, Rizki Ainuna Wijaya, Mochamad Zakki Fahmi, Alfa Akustia Widati, Hwei Voon Lee, Takahiro Fujioka, Nuryono, Chun-Hu Chen
Summary: This study developed buoyant and magnetically responsive diatomaceous-earth incorporated magnetic alginate beads that can efficiently adsorb oil spills and be regenerated through magnetic separation.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Environmental Sciences
Sandrine Boivin, Shuji Tanabe, Takahiro Fujioka
Summary: This study evaluated the reliability of a real-time bacteriological counter coupled with an online dialysis membrane-based pre-treatment system for continuously monitoring bacterial cell counts in sand filter effluents. The online analysis identified different timing of concentration peaks between particle and bacterial cell counts, while bacterial community analysis revealed the dominating phyla. The results indicated the potential of monitoring bacterial cell counts in sand filter process for providing an early warning of filter failures.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Alena Popova, Radamanee Rattanakom, Zhi-Qiang Yu, Zhuolin Li, Kei Nakagawa, Takahiro Fujioka
Summary: Advanced drinking water treatment using nanofiltration (NF) membranes has shown promise in removing challenging constituents in contaminated surface waters. However, there are uncertainties in the removal of nitrogen compounds, such as ammonium, nitrites, and nitrates. This study evaluated the ability of commercial NF membranes to remove these compounds and identified the mechanisms underlying their transport through the membranes. The results showed that ammonium had the highest removal rate, but varied significantly depending on the membrane type and operating conditions. The study suggests that appropriate membrane selection and prediction of removal range can ensure compliance with drinking water regulations for these nitrogen compounds.
Article
Biotechnology & Applied Microbiology
Hai Duc Minh Tran, Hideaki Sano, Sandrine Boivin, Naoki Ohkuma, Mitsuharu Terashima, Takahiro Fujioka
Summary: This study assessed the effectiveness of sodium hypochlorite-assisted osmotic backwashing in reducing fouling of FO membrane and found that low concentration NaClO cleaning strategy can achieve higher water flux restoration.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Engineering, Environmental
Sandrine Boivin, Eri Hasegawa, Dabide Yamaguchi, Takahiro Fujioka
Summary: This study aims to develop a rapid and automatic method to accurately measure Pseudanabaena sp. concentrations using fluorescence detection of phycocyanin. The study found a high correlation between manually-counted and automatically-counted concentrations of Pseudanabaena sp. The developed method using a phycocyanin filter proved to be more accurate than the previously used chlorophyll filter. This method can provide a reliable warning of potential 2-MIB occurrence in drinking water sources.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Hitoshi Kodamatani, Karin Kubozono, Ryo Kanzaki, Takashi Tomiyasu, Takahiro Fujioka
Summary: In this study, a reverse osmosis (RO) membrane treatment was used as a pretreatment for NDMA analysis in high-matrix water samples. The method successfully isolated NDMA from interfering substances and showed the potential for continuous monitoring of NDMA in aqueous solutions.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2023)
