Article
Environmental Sciences
Pau Sanchis-Perucho, Angel Robles, Freddy Duran, Frank Rogalla, Jose Ferrer, Aurora Seco
Summary: AnMBR technology shows promise for urban wastewater treatment, but the loss of dissolved methane poses environmental challenges. This study explores the use of temperature and hydrodynamics to improve methane capture efficiency in AnMBR effluents. Improving recovery efficiency can enhance energy production and environmental sustainability of the technology.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Erick Centeno Mora, Aline Gomes de Oliveira Paranhos, Sergio Francisco de Aquino, Carlos Augusto de Lemos Chernicharo
Summary: This study evaluated a novel configuration, using pressurised dynamic membrane modules (PDMMs), for treating anaerobic effluent from sewage. The results showed that the dense membrane had a more stable performance and could effectively remove pollutants such as methane and sulphide, while the microporous membrane suffered from wetting. Additionally, automated and chemical cleaning methods were effective in controlling fouling and maintaining membrane performance.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Environmental Sciences
Erick Centeno Mora, Carlos Augusto de Lemos Chernicharo
Summary: This article studied the simultaneous desorption/removal of dissolved methane and sulphide from anaerobic effluents with hollow fibre membrane contactors. The results showed that using dense membrane and air as sweeping gas resulted in higher removal efficiencies, and the removal mechanism for sulphide was oxidation with oxygen from the air. In addition, using air as sweeping gas increased the dissolved oxygen concentration in the effluent.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Review
Engineering, Environmental
Xuesong Li, Hyung-Sool Lee, Zhiwei Wang, Jongho Lee
Summary: The review discusses the promises and challenges of existing and emerging technologies for dissolved methane management in low-temperature anaerobic processes, presenting a comparative assessment of these technologies in terms of methane treating efficiency, energy production potential, applicability, and scalability. Current research needs and future perspectives are highlighted for the advancement of economically and technically sustainable methane management technology.
Review
Environmental Sciences
Perlie Velasco, Veeriah Jegatheesan, Kandasamy Thangavadivel, Maazuza Othman, Yang Zhang
Summary: The article provides a review of studies on the production of dissolved methane from AnMBR and explores the use of membrane technology or membrane contactors in recovering dissolved methane from AnMBR effluent. The focus is on developing more economical methods for resource recovery through membrane modifications.
Review
Environmental Sciences
Jose A. Contreras, Edgardo I. Valenzuela, Guillermo Quijano
Summary: This study provides an overview of the recent developments in nitrate/nitrite-dependent anaerobic oxidation of methane (N-AOM), including the fundamental principles, microbiology, reactor configurations, and operational conditions. The potential advantages of the N-AOM process over aerobic methanotrophic biotechnologies are discussed, as well as the challenges of implementing this biotechnology at full scale.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Chemical
Abhishek Dutta, Xuesong Li, Jongho Lee
Summary: The study showed that factors such as temperature and feed-to-draw volume ratio can impact methane recovery efficacy, with lower temperatures and larger ratios leading to higher methane recovery. The experimental results and mass transfer model demonstrated the potential of the solvent-based membrane contactor process for methane harvesting from anaerobic effluents, even in cold climates.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Review
Engineering, Environmental
Carla Kalakech, Qazi Sohaib, Geoffroy Lesage, Jean -Pierre Mericq
Summary: This review summarizes and analyzes studies on biomethane production and the parameters affecting downstream membrane contactors. It provides an overview of membrane contactor principles, dissolved methane quantification, membrane characteristics, and liquid and gas phase hydrodynamics, as well as discusses the challenges and promises of membrane contactor operations.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Agricultural Engineering
Erick Centeno Mora, Claudio Leite de Souza, Thiago de Alencar Neves, Carlos de Lemos Chernicharo
Summary: This study investigated the characteristics and potential energetic uses of gas recovered from the desorption of dissolved methane (D-CH4) in anaerobic effluents using hollow fibre membrane contactors. The recovered gas contained significant amounts of methane, carbon dioxide, hydrogen sulfide, nitrogen, and oxygen, requiring gas upgrading prior to use as a biofuel. The recovery process should be energetically self-sustainable and reduce the carbon footprint of sewage treatment plants considerably. Recovering D-CH4 with membrane contactors could increase the energetic potential of anaerobic-based sewage treatment plants by up to 50% and allow for more sustainable systems.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Ling-Dong Shi, Zhen Wang, Tao Liu, Mengxiong Wu, Chun-Yu Lai, Bruce E. Rittmann, Jianhua Guo, He-Ping Zhao
Summary: Methane as an electron donor can be used for biological reduction of oxidized contaminants, offering a promising solution. Research on related microorganisms and metabolic pathways has increased in recent years, with ongoing experimental demonstrations of methane oxidation.
Article
Engineering, Environmental
Chao Rong, Tianjie Wang, Zibin Luo, Yu -You Li
Summary: The study investigated sludge production and greenhouse gas emissions from AnMBRs treating municipal wastewater at seasonal temperatures. The results showed that the AnMBR achieved good COD removal and methane and sludge yields. The study also assessed the GHG emissions of a full-scale AnMBR plant and found that significant energy recovery reduced emissions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Nga Tran Thi Viet, Duc Canh Vu, Thu Hang Duong
Summary: This study evaluated a submerged flat sheet anaerobic membrane bioreactor (AnMBR) system's performance in treating wastewater from a slaughterhouse in Hanoi at different hydraulic retention times (HRT) of 8 to 48 hours. The system achieved high removal efficiencies for suspended solids (SS) and chemical oxygen demand (COD) at an optimum HRT of 24 hours. Importantly, the system maintained stable operation without flux decay and membrane fouling.
ENVIRONMENTAL RESEARCH
(2023)
Article
Agricultural Engineering
Anissa Sukma Safitri, Krista Michelle Kaster, Roald Kommedal
Summary: This study investigated the production of biogas and removal of municipal wastewater COD at low temperatures using granulated anaerobic biomass. The results showed that stable COD removal and methane production could be achieved at higher temperatures, and temperature did not significantly affect the methane production rate and yield. COD removal and methane yields decreased at lower temperatures, but significant methane formation was still observed.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Sheng-Qiang Fan, Guo-Jun Xie, Yang Lu, Zhi-Cheng Zhao, Bing-Feng Liu, De-Feng Xing, Jie Ding, Hong-Jun Han, Nan-Qi Ren
Summary: Mainstream anaerobic wastewater treatment for recovering methane-rich biogas faces challenges in nitrogen and dissolved methane removal at low temperatures. This study used granular sludge coupling n-DAMO with Anammox for efficient nitrogen removal and investigated dissolved methane removal potential at low temperatures. The research achieved stable nitrogen removal rates and high effluent quality in a lab-scale membrane granular sludge reactor. Granular sludge maintained activity even at low temperatures, with a compact structure and stable community composition during long-term operation. Energy recovery could be maximized by recovering dissolved methane, supporting high-level nitrogen removal.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Zhuan Khai Lim, Min Zheng, Zhiguo Yuan, Jianhua Guo, Shihu Hu
Summary: This study demonstrated the versatile applications of n-DAMO process in real wastewater treatment for the first time, achieving effective nitrogen removal by combining anammox and n-DAMO microorganisms.
Article
Environmental Sciences
Hisashi Satoh, Kai Kikuchi, Yutaka Katayose, Shu Tsuda, Reiko Hirano, Yuga Hirakata, Masaaki Kitajima, Satoshi Ishii, Mamoru Oshiki, Masashi Hatamoto, Masahiro Takahashi, Satoshi Okabe
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Microbiology
Takahiro Segawa, Nozomu Takeuchi, Hiroshi Mori, Rathnayake M. L. D. Rathnayake, Zhongqin Li, Ayumi Akiyoshi, Hisashi Satoh, Satoshi Ishii
FEMS MICROBIOLOGY ECOLOGY
(2020)
Article
Environmental Sciences
Meri Nakajima, Reiko Hirano, Satoshi Okabe, Hisashi Satoh
Summary: A simple assay for colorimetric quantification of bacterial 16S rRNA was developed, based on RNA extraction with commercial kits and mixing with Au-nanoprobes and NaCl. The assay format was validated and optimized, achieving linear calibration curve above 5.0 x 10(7) copies/mu L and a limit of detection of 1.17 x 10(8) copies/mu L. The quantification of bacterial 16S rRNA in activated sludge samples showed deviations between 48% and 208% compared to RT-qPCR results, introducing an innovative tool for stable treatment performance in wastewater processes.
Article
Mechanics
Yasunori Watanabe, Haruhi Oyaizu, Hisashi Satoh, Yasuo Niida
Summary: This study proposes novel probabilistic empirical models for the rise velocity and bubble drag of a microbubble swarm, incorporating bubble-vortex interactions. Convective interactions between bubbles and vortex-induced flows are found to accelerate bubbles and align them along paths in the flow, resulting in an increase in rise velocity and its variance in the statistical equilibrium state.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2021)
Article
Engineering, Environmental
Hisashi Satoh, Yutaka Katayose, Reiko Hirano
Summary: A novel and simple method was developed to monitor Escherichia coli concentrations in river water, which was found to be reliable and applicable for estimating E. coli concentrations through monitoring GUS activities. The method is simple, rapid, reliable, inexpensive, and high throughput, making it useful for monitoring E. coli in river water.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Environmental
Koji Matsunaga, Hisashi Satoh, Reiko Hirano
Summary: In this study, a simple analytical method using CeO(2)NPs and FAM-labeled DNA was developed to determine As(V) concentrations in groundwater. After optimizing the parameters, the total analysis time was about 20 min and the limit of detection was 0.61 μM. The method showed high selectivity against other metal ions.
Article
Engineering, Environmental
Koji Matsunaga, Yuki Nakaya, Hisashi Satoh
Summary: We investigated the interaction between As(III) and As(III)-binding DNA aptamers (Ars-3). The study found that Ars-3 cannot bind As(III), but As(III) can selectively adsorb onto gold nanoparticles. We developed simple analytical methods to measure the concentrations of As(III) and As(V) separately in ultrapure water and groundwater.
Article
Engineering, Environmental
Kyohei Kuroda, Takashi Narihiro, Yuki Nakaya, Taro Q. P. Noguchi, Ryota Maeda, Masaru K. Nobu, Yuki Ohnishi, Yasuhiro Kumaki, Tomoyasu Aizawa, Hisashi Satoh
Summary: With the increasing usage of plastics, the environmental risk associated with the disposal of waste plastics and discharge of microplastics has become a concern. This study established anaerobic microbial consortia that can degrade PET-derived materials and identified the degradation pathways and microorganisms involved.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Yuki Nakaya, Jinming Jia, Hisashi Satoh
Summary: In this study, a digital microscope and an automatic stage were used to rapidly obtain magnified floc images and calculate shape parameters. The morphological parameters and extracellular polymeric substances (EPS) quantity/quality of AS were analyzed in four wastewater treatment plants. The results showed that larger, denser, and smoother flocs tend to have better dewaterability and settlement properties.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Engineering, Environmental
Mohomed N. M. Shayan, Yuna Tanaka, Reiko Hirano, Yuki Nakaya, Hisashi Satoh
Summary: Fecal pollution in urban rivers poses risks to human health and the environment. A simple and rapid method was developed in this study to detect fecal pollution in urban rivers. By measuring the beta-D-glucuronidase (GUS) activity of Escherichia coli (E. coli) cultures, fecal pollution sources could be distinguished from naturally occurring E. coli. This method can be used to detect fecal pollution in urban rivers by setting a threshold for GUS activity.
Article
Environmental Sciences
Meri Nakajima, Reiko Hirano, Yuki Nakaya, Hisashi Satoh
Summary: This article introduces a simple method for quantifying the concentration of functional bacteria's 16S rRNA in wastewater without reverse transcription of RNA or quantitative polymerase chain reaction (qPCR). The method was optimized and a calibration curve for ammonia-oxidizing bacteria (AOB) 16S rRNA was created, allowing for the quantification of AOB in wastewater treatment processes.
Article
Engineering, Multidisciplinary
Terrance M. Rengarasu, S. A. D. Priyankara, Wasala M. K. R. T. W. Bandara, Nishanthini Jegatheesan
Summary: The research found that using CRH and BC as partial asphalt binder replacements can improve the performance of asphalt at high temperatures and reduce the amount of asphalt required. Although the modifications decreased the Marshall stability and Indirect tensile strength, they still met the specifications for highways and retained high performance after moisture conditioning.
ENGINEER-JOURNAL OF THE INSTITUTION OF ENGINEERS SRI LANKA
(2022)
Article
Environmental Sciences
Hisashi Satoh, Natsumi Nagahashi, Kai Kikuchi, Reiko Hirano
Summary: Wastewater treatment plants have been identified as potential reservoirs of antibiotic-resistant bacteria. In this study, a novel simple testing method was developed to rapidly determine the concentration of antibiotic-resistant E. coli in wastewater and river water samples.
Article
Engineering, Environmental
Hisashi Satoh, Yukari Kashimoto, Naoki Takahashi, Takashi Tsujimura
Summary: This study developed two deep learning-based classifiers to recognize different morphologies of AS flocs and the abundance of filamentous bacteria within them. Through retraining, classifier-1 accurately distinguished between aggregated and dispersed flocs, and recognized morphological changes. Classifier-2 quantitatively identified the abundance of filamentous bacteria within the AS flocs.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2021)
Article
Chemistry, Analytical
Meri Nakajima, Akihiko Ishida, Manabu Tokeshi, Hisashi Satoh
Article
Engineering, Environmental
Rong-Gui Zhu, Chang-Gui Pan, Feng-Jiao Peng, Chao-Yang Zhou, Jun-Jie Hu, Kefu Yu
Summary: This comprehensive survey investigated the occurrence, bioaccumulation, and trophic magnification of parabens and their metabolite 4-HB in a marine food web. Results showed that parabens were the predominant pollutants in marine organisms, with significant bioaccumulation from sediments. The estimated trophic magnification factor indicated biomagnification for MeP and trophic dilution for 4-HB. Overall, the risks for humans consuming marine organisms were found to be low.
Article
Engineering, Environmental
Andres F. Torres-Franco, Deborah Leroy-Freitas, Cristina Martinez-Fraile, Elisa Rodriguez, Pedro A. Garcia-Encina, Raul Munoz
Summary: Anaerobic and microalgae-based technologies have emerged as sustainable alternatives for municipal wastewater treatment. However, the presence of viruses in the treated wastewater is a major concern for reuse applications. This study assessed the ability of these technologies to reduce viruses during secondary wastewater treatment. The results showed that all technologies were effective in reducing the concentration of viruses, with microalgae-based treatment exhibiting the highest potential for reducing the disinfection requirements of treated wastewater.
Article
Engineering, Environmental
Young Gwang Kim, Sae Yun Kwon, Spencer J. Washburn, Scott C. Brooks, Ji Won Yoon, Lucien Besnard
Summary: The study uses Hg isotope ratios to identify the sources and exposure pathways of mercury in bivalves, finding that dissolved Hg phases in the water column are the primary source and exposure pathway to bivalves. This provides new insights into using bivalves as bioindicators for sediment quality monitoring.
Article
Engineering, Environmental
Hui Geng, Ying Xu, Rui Liu, Dianhai Yang, Xiaohu Dai
Summary: This study investigates the effect of cation exchange resin (CER) on the sequential recovery of hydrogen and methane from anaerobic digestion (AD) and the corresponding mechanisms. The results show that CER can simultaneously enhance the production of hydrogen and methane by promoting the solubilisation, hydrolysis, and acidification of organic matter. Additionally, CER facilitates effective contact between bacteria and organic particulates and reduces the energy barrier for mass transfer during methane production. The study also reveals changes in the microbial community structure and metagenomics during the AD process.
Article
Engineering, Environmental
Xiaojing Lin, Zhan Jin, Shunfeng Jiang, Zhiquan Wang, Suqing Wu, Ke Bei, Min Zhao, Xiangyong Zheng
Summary: Dehumidification combined with addition of absorbent resin supplement (ARS) was used to achieve rapid evaporation of non-pretreated urine, resulting in high water evaporation efficiency and nutrient recovery.
Article
Engineering, Environmental
Yangli Che, Chaoran Lin, Shen Li, Jiao Liu, Longhai Zhu, Shilei Yu, Nan Wang, Haoshuai Li, Mutai Bao, Yang Zhou, Tonghao Si, Rui Bao
Summary: Hydrodynamic processes play a crucial role in the transmission of sediments, microbial assembly, and organic carbon redistribution in the ocean. Through experiments and analysis, we found that hydrodynamics shape the assembly of microbial communities and control the redistribution of different sourced organic carbon, thereby influencing microbial-mediated biogeochemical transformation.
Article
Engineering, Environmental
Chao Chen, Yu Yang, Nigel J. D. Graham, Zhenyu Li, Xingtao Yang, Zhining Wang, Nadia Farhat, Johannes S. Vrouwenvelder, Li -an Hou
Summary: The fouling of seawater reverse osmosis membranes is a persistent challenge in desalination. This study monitored the operational performance of a desalination plant for 7 years and the fouling development in different areas of membrane modules. The findings showed that operational performance declined over time and fouling mainly occurred at the feed side of the modules, with the highest microbial diversity. Keystone species like Chloroflexi and Planctomycetes played an important role in maintaining community structure and biofilm maturation. Polysaccharides, soluble microbial products, marine humic acid-like substances, and inorganic substances contributed to fouling. Overall, biofouling had a significant impact on membrane fouling after 7 years of operation.
Article
Engineering, Environmental
Dan Li, Jieyi Sun, Yibo Fu, Wentao Hong, Heli Wang, Qian Yang, Junhong Wu, Sen Yang, Jianhui Xu, Yunfei Zhang, Yirong Deng, Yin Zhong, Ping'an Peng
Summary: Sulfidation-oxidation treatment of magnetite (Fe3O4) enhances the production of dark center dot OH, which can efficiently degrade dissolved organic matter (DOM) and accelerate carbon cycling.
Article
Engineering, Environmental
Cheng Yu, Kaijun Wang, Kaiyuan Zhang, Ruiyang Liu, Pingping Zheng
Summary: This study implemented a microaerobic-aerobic configuration in a full-scale municipal wastewater treatment facility and investigated the effects on sludge characteristics, pollutant removal, microbial community, and granulation mechanisms. The results showed successful transition from flocculent-activated sludge to well-defined AGS after two months of operation. The primary pathways for pollutant removal were simultaneous nitrification, denitrification, and phosphorus removal. Moreover, the incorporation of internal separators induced shifts in the flow pattern, which promoted granulation.
Article
Engineering, Environmental
Zhe Zhang, Shaoyang Hu, Guangrong Sun, Wei Wang
Summary: Halogenated aromatic disinfection byproducts (DBPs), such as halogenated phenols, have garnered widespread attention due to their high toxicity and prevalence. This study reports on the analysis, occurrence, and cytotoxicity of a group of emerging halogenated aromatic DBPs, known as halogenated polyhydroxyphenols (HPPs), in drinking water.
Article
Engineering, Environmental
Shengyue Chen, Jinliang Huang, Peng Wang, Xi Tang, Zhenyu Zhang
Summary: Accurate prediction of river water quality is crucial for sustainable water management. This study introduces wavelet analysis and transfer learning techniques to assist LSTM modeling, proposing a newly coupled modeling approach that improves short-term prediction of river water quality.
Article
Engineering, Environmental
Bang Du, Xinmin Zhan, Piet N. L. Lens, Yifeng Zhang, Guangxue Wu
Summary: Efficient anaerobic digestion relies on the cooperation of different microorganisms with different metabolic pathways. This study investigated the effects of different operational modes and the addition of powdered activated carbon (PAC) on ethanol metabolic pathways. The results showed that the SBR mode and the presence of CO2 facilitated ethanol metabolism towards propionate production, while the CFR mode with extended solids retention time enriched Geobacter. Adjusting operational modes and PAC addition can modulate anaerobic ethanol metabolism and enrich Geobacter.
Article
Engineering, Environmental
Wanfa Wang, Si-Liang Li, Jun Zhong, Yuanbi Yi, Fujun Yue, Zenglei Han, Qixin Wu, Ding He, Cong-Qiang Liu
Summary: This study compares the carbon biogeochemical processes in karst and non-karst regions within large thermal stratified river-reservoir systems. The results demonstrate that karst reservoirs have a reduced potential for carbon emissions and highlight the importance of considering geologic settings to improve accuracy in regional and global CO2 emission estimates.
Article
Engineering, Environmental
Chunxia Jiang, Zelong Zhao, Dong Zhu, Xiong Pan, Yuyi Yang
Summary: This study analyzed the occurrence and distribution of antibiotic resistance genes (ARGs) in different environmental media of the Yangtze River using metagenomics. Core resistome dominated by multidrug resistance genes was found in all samples, while rare resistome dominated by various resistance genes was more prevalent in plasmids. Specific bacteria were identified as hosts for both core and rare resistomes, with high clinical concern ARGs found in the rare resistome. Particle-associated environment provided the most ideal conditions for resistome hosts. This study provided insights into the genetic locations of ARGs and the community assembly mechanisms of ARG hosts in freshwater environments.
Article
Engineering, Environmental
Yu Zhang, Yongtao He, Linchun Jia, Lei Xu, Zheng Wang, Yueling He, Ling Xiong, Xumeng Lin, Hong Chen, Gang Xue
Summary: By synergizing organic carbon source, thiosulfate, and zero-valent iron, efficient mixotrophic denitrification of oligotrophic secondary effluent can be achieved. Thiosulfate plays a vital role in promoting TN removal efficiency, while corrosion of Fe0 releases OH- to neutralize H+ from thiosulfate-driven denitrification, creating a suitable environment for denitrification. The coordination of thiosulfate and Fe0 maintains the dominance of Thiobacillus for denitrification.
