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
Agricultural Engineering
Jialing Ni, Jiayuan Ji, Kengo Kubota, Yu-You Li
Summary: This study investigated the concentration-dependent effects of sodium hypochlorite on biodegradation performance and microbial activity. The results showed that methane production and microbial community were almost unaffected within a certain concentration range. At high concentrations, microbial products could protect or recover the activity of anaerobic microorganisms.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Rong Huang, Tong Zhang, Qiaoying Wang, Hongbo Gu, Zhen Zhou, Zhichao Wu, Zhiwei Wang
Summary: Membrane fouling can be effectively alleviated by using conductive membrane and external electric field in membrane bioreactor. This study investigated the degradation mechanisms and cleaning efficiency of organic foulants on composite conductive microfiltration membranes. It was found that electrochemical oxidation and sodium hypochlorite (NaClO) showed high degradation efficiency for bovine serum albumin (BSA). Electrochemical oxidation converted BSA into foams and flocs, while NaClO oxidation decomposed BSA into small molecules. The combination of electric fields and NaClO exhibited great membrane cleaning efficiency and reduced secondary pollution.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Biotechnology & Applied Microbiology
Shimei Ge, Ruixue Yang, Ying Zhang, Alan Kueichieh Chang, Yaru Li, Xiaohui Chen, Xinjiao Dong
Summary: Quorum quenching (QQ) is a promising strategy for mitigating membrane biofouling in membrane bioreactors (MBRs). This study isolated and studied six QQ bacterial strains, finding that strain Y6 performed better in reducing biofouling in MBR due to the presence of extracellular QQ enzymes and rapid adaptation to the conditions within the MBR. Additionally, strain Y6 did not affect the content of various compounds in the effluent released by the MBR.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2023)
Article
Environmental Sciences
Nur Hafizah Ab Hamid, David K. Wang, Simon Smart, Liu Ye
Summary: Forward osmosis membrane bioreactors (FOMBRs) are gaining attention for their potential to produce high effluent quality and better flux stability against fouling. This study found that a hybrid cleaning strategy involving physical and free nitrous acid (FNA) cleanings can effectively recover water flux and slow down fouling deposition during long-term FOMBR operation. The results suggest that FNA solution has the potential to not only recover membrane performance, but also to act as a strategy to mitigate fouling deposition.
Article
Engineering, Environmental
Suda Ittisupornrat, Suthida Theepharaksapan
Summary: The study evaluated the greywater treatment performance of a pilot-scale membrane bioreactor (MBR) and investigated the biofilm formation on the Pall ring media in the permeate pipeline. The presence of dominant bacterial species in the biofilm was identified, which can be used to select appropriate disinfection methods and prevent biofouling of the reverse osmosis (RO) membrane, thus facilitating the application of the MBR-RO process for water reuse.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Chemical
Zeyuan Gao, Zhi-Ping Zhao, Weiwei Cai
Summary: This study simulated reactions between PACs and NaClO under current online membrane cleaning practices. The results showed that NaClO-induced PAC variations weakened PAC adsorption capacities and increased PAC deposition on membrane surfaces. Applying altered PACs in PAC/UF water treatment system led to aggravated membrane fouling and decreased surface water treatment performances.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Environmental Sciences
Huifang Sun, Yu Liu
Summary: The study confirmed the contribution of released dissolved organic matter (DOM) from sludge suspension after NaClO cleaning in MBRs to subsequent membrane fouling development in a ceramic MBR.
Article
Chemistry, Physical
Mehmet Tontu, Mehmet Bilgili, Besir Sahin
Summary: This study examines the implementation of electrochemical technology for producing sodium hypochlorite and hydrogen from seawater on-site for a steam power plant. The effects of electrical current and seawater temperature on the electrochlorination system are investigated. Results show that current efficiency increases with higher electrical current, with electricity consumption also increasing with enhancements in both current and seawater temperature.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Environmental Sciences
Hira Waheed, Ch Tahir Mehmood, Yiwei Li, Ying Du, Yeyuan Xiao
Summary: In this study, anaerobic bacteria naturally isolated were used to encode four quorum quenching (QQ) enzymes, which were then applied in immobilized and bioaugmented forms to investigate their effects on membrane foulants, microbial taxa, and biofouling control. Two anaerobic membrane bioreactors (AnMBRs) with different immobilizing media (silica-alginate and hollow fiber-alginate) were operated in two conventional and three QQ-based phases. The addition of QQ anaerobes in both free cells and immobilized form significantly extended the membrane filtration operation time in AnMBR-Si and AnMBR-Hf. Furthermore, QQ application resulted in a biocake with lower surface coverage compared to conventional phases.
Article
Environmental Sciences
Yili Chen, Qian Sheng, Jianjian Wei, Qinghe Wen, Dehua Ma, Jiansheng Li, Yawei Xie, Jinyou Shen, Xiuyun Sun
Summary: In this study, a PVDF membrane modified with ozonation catalyst nano-MnO2 was used in MBR, coupled with in-situ ozonation to improve anti-biofouling performance. The combined approach effectively reduced membrane biofouling rate and increased membrane cleaning cycle, providing a new strategy for controlling membrane biofouling in MBR treating industrial wastewater.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Sen Zeng, Yuanshang Liu, Yanmin Wang, Yunhua Wang, Yaming Zhou, Lihuang Li, Shuo Li, Xi Zhou, Miao Wang, Xueqin Zhao, Lei Ren
Summary: In this study, a novel MOF-supported carbon fibers membrane with high regeneration and antifouling capability was developed to remove phosphate from algae-rich water. The membrane exhibited a maximum adsorption capacity of 333.3 mg g-1 (pH 7.0) and excellent selectivity for phosphate sorption over coexisting ions. Moreover, the membrane showed robust photo-Fenton catalytic activity and could maintain high regeneration efficiency even under algae-rich condition.
Article
Environmental Sciences
Jiaqi Ding, Ying Wan, Yujia Zou, Songlin Wang, Xiaolong Huang, Pengchao Xie
Summary: Sodium hypochlorite solution is commonly used to remove organic fouling and restore membrane flux, but it can lead to the formation of halogenated by-products. To mitigate these by-products, a combined cleaning process with sodium hypochlorite and peroxides (hydrogen peroxide, peroxydisulfate, and peroxymonosulfate) was applied offline. It was found that all the combined cleaning processes effectively restored membrane flux. The process of peroxide cleaning followed by sodium hypochlorite cleaning (peroxide-sodium hypochlorite) resulted in fewer halogenated by-products compared to the sodium hypochlorite post-combined cleaning process (sodium hypochlorite-peroxide), with the PDS-sodium hypochlorite cleaning process demonstrating the best performance in controlling by-products. Overall, the generation of most by-products showed a positive correlation with reaction time and temperature.
Article
Engineering, Environmental
Haoliang Pang, Jinhui Huang, Xue Li, Kaixin Yi, Suzhou Li, Zhexi Liu, Wei Zhang, Chenyu Zhang, Si Liu, Yanling Gu
Summary: In this research, electrospun fiber coated hydrogel QQ beads (QQ-ECHB) were fabricated for the first time, which showed long-lasting QQ activity and stable physical washing effect. The QQ-ECHB significantly prolonged the time to reach transmembrane pressure (TMP) of 40 kPa in a membrane bioreactor (MBR) and maintained its structural strength and stability under cyclic compression and fluctuations in sewage quality.
Article
Engineering, Environmental
Kibaek Lee, Yeong-Jun Park, Tahir Iqbal, Hyeona Park, Yeongyun Jung, Jae-Ho Shin, Kwang-Ho Choo
Summary: Quorum quenching (QQ) has been successful in preventing biofouling in membrane bioreactors (MBRs) using isolated QQ bacterial strains. However, the effect of QQ on the microbial population is still not fully understood. This study analyzed the microbial population in MBRs over an extended period under different conditions and found that QQ treatment did not significantly affect the structure and diversity of the microbial community. The research also provided insights into the role of bacterial QQ in reducing MBR biofouling and its underlying mechanisms.
Article
Biochemical Research Methods
Hidenori Tani, Masahiro Yamaguchi, Yasushi Enomoto, Yasufumi Matsumura, Hiroshi Habe, Tetsuya Nakazato, Shinya Kurata
Summary: The developed novel nanocomposite bead system can detect specific DNA sequences amplified by PCR visually without the need for instrumental detection, with a high sensitivity of detecting PCR products with a detection limit of 10 copies/tube for DNA templates. Additionally, the risk of carryover contamination is minimized as all components are included within the initial cap. This system has broad application prospects in biological and biomedical research for the detection of specific DNA sequences.
ANALYTICAL BIOCHEMISTRY
(2021)
Article
Engineering, Environmental
Tomo Aoyagi, Yoshihiko Mori, Mai Nanao, Yusuke Matsuyama, Yuya Sato, Tomohiro Inaba, Hidenobu Aizawa, Takayuki Hayakawa, Masahiko Moriya, Yasuhide Higo, Hiroshi Habe, Tomoyuki Hori
Summary: The study found that indigenous microorganisms stimulated by lactate play a crucial role in promoting biological immobilization treatment of Se in waste rocks, by reducing the dissolved Se through dissimilatory Se reduction.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Hideyuki Ihara, Ayako Kumagai, Tomoyuki Hori, Kenji Nanba, Tomo Aoyagi, Mitsuru Takasaki, Yoko Katayama
Summary: This study investigated bacterial communities in radioactive Cs-contaminated and non-contaminated soils, revealing lower bacterial diversity and significant differences in bacterial communities in the most contaminated area compared to other areas, with an enrichment of the radio-resistant Geodermatophilus bullaregiensis. Information on soil type, vegetation, and soil-use history enhanced the direct comparison of geographically distant soil bacterial communities exposed to different levels of radioactive contamination.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Analytical
Hiroshi Aoki, Masaki Torimura, Hiroshi Habe
Summary: This study explores a method to discriminate microplastics by analyzing the change in fluorescent properties after adsorption of fluorescent dyes onto microplastic surfaces. Fluorescein and Methylene Blue showed increased fluorescence intensity, while Rhodamine 6G showed negligible changes. This research demonstrates the potential to identify and estimate individual plastic materials by investigating appropriate fluorescent dyes.
ANALYTICAL SCIENCES
(2021)
Article
Engineering, Environmental
Tomo Aoyagi, Yoko Katayama, Hidenobu Aizawa, Mitsuru Takasaki, Tomoyuki Hori
Summary: The study investigated the ecological roles of denitrification-dependent sulfur oxidizers in tsunami-deposited marine sediment with nitrate amendment. Through time-resolved high-sensitivity C-13-bicarbonate probing of rRNA, the research revealed the trophic relationship between sulfur oxidizers and sulfate reducers, leading to the restoration of marine ecosystem function.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Yuya Sato, Takaya Hamai, Tomoyuki Hori, Tomo Aoyagi, Tomohiro Inaba, Kentaro Hayashi, Mikio Kobayashi, Takeshi Sakata, Hiroshi Habe
Summary: The study found that sulfate-reducing bacteria (SRB) can acclimatize to bioreactor environments without a preincubation phase. The amount of rice bran and hydraulic retention time significantly impact reactor performance, with lower rice bran amounts and shorter HRT leading to deteriorations in performance. Operating bioreactors with 200 g of rice bran and an HRT of 12.5 h was the most effective in treating AMD, showing a sulfate reduction rate of 20.7-77.9% during days 54-242.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Multidisciplinary Sciences
Saki Oya, Satoshi Tonegawa, Hirari Nakagawa, Hiroshi Habe, Toshiki Furuya
Summary: In this study, microorganisms that can transform and cleave the ether bond of 2-phenoxyacetophenone, a model compound for the beta-O-4 linkage in lignin, were isolated and characterized. Among them, Acinetobacter sp. TUS-SO1 efficiently and selectively cleaves the ether bond of 2-phenoxyacetophenone. These microorganisms may play important roles in the degradation of lignin-related compounds in nature.
SCIENTIFIC REPORTS
(2022)
Article
Microbiology
Yong Guo, Hideyuki Ihara, Tomo Aoyagi, Tomoyuki Hori, Yoko Katayama
Summary: This study presents the draft genome sequences of two sulfur-oxidizing chemolithoautotrophic bacteria, Sulfurovum spp. TSL1 and TSL6, isolated from tsunami-launched marine sediment in the Great East Japan earthquake.
MICROBIOLOGY RESOURCE ANNOUNCEMENTS
(2022)
Article
Engineering, Environmental
Tomohiro Inaba, Takuto Goto, Tomo Aoyagi, Tomoyuki Hori, Keita Aoki, Yuya Sato, Noriaki Ono, Tsutomu Furihata, Hiroshi Habe, Satoshi Ogino, Atsushi Ogata
Summary: Treating ironworks wastewater with high concentrations of nitrate is a major challenge in steel manufacturing. In this study, we developed an N-2 gas aerated anaerobic membrane bioreactor (AnMBR) and evaluated its nitrate removal capacity. Our findings showed that AnMBR, with the involvement of denitrification and Hyphomicrobium nitrativorans, can effectively degrade nitrate.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Agronomy
Shota Shirane, Noriaki Momma, Toshiyuki Usami, Chiharu Suzuki, Tomoyuki Hori, Tomo Aoyagi, Seigo Amachi
Summary: Anaerobic soil disinfestation (ASD) is an ecofriendly alternative to chemical fumigation for eliminating soil-borne plant pathogens. This study found that caproate, produced by a specific strain of bacteria, is a key disinfestation factor in ethanol-based ASD, and the direct application of caproate to soil could be a promising strategy for rapid and stable soil disinfection.
Article
Engineering, Environmental
Xinyi Zhou, Taku Fujiwara, Taira Hidaka, Fumitake Nishimura, Tomohiro Nakanishi, Akihiko Terada, Tomoyuki Hori
Summary: In this study, a microaerobic activated sludge process (MAS) was proposed as a pretreatment method to retain NH4-N from high-strength nitrogenous wastewater. The MAS systems achieved high NH4-N retention rates and TOC removal rates. The emissions of CO2 and N2O during MAS were evaluated, and the mechanisms of N2O emission from each reactor were investigated. The study highlighted the importance of N2O mitigation in the MAS process, especially under acidic conditions.
Article
Engineering, Environmental
Ralph Rolly Gonzales, Keizo Nakagawa, Kazuo Kumagai, Susumu Hasegawa, Atsushi Matsuoka, Zhan Li, Zhaohuan Mai, Tomohisa Yoshioka, Tomoyuki Hori, Hideto Matsuyama
Summary: This study demonstrates a hybrid osmotically assisted reverse osmosis (OARO) and reverse osmosis (RO) process for the enrichment and recovery of ammoniacal nitrogen in wastewater, resulting in energy-saving and economic benefits.
Article
Chemistry, Applied
Katsuya Nouzaki, Ryoichi Tanaka, Yuya Sato, Tomohiro Inaba, Tomo Aoyagi, Tomoyuki Hori, Hiroshi Yanagishita, Hiroshi Habe
Summary: The discharge of high-strength oily wastewater has negative impacts on the environment, making the treatment of food industry wastewater containing fats, oils, and grease crucial. This study used a membrane bioreactor (MBR) to treat Ramen noodle-soup wastewater and evaluated the optimal oil concentration for MBR startup in both winter and summer. The MBR system demonstrated successful startup in both seasons with a 20-fold dilution of the original oily wastewater, containing approximately 950 to 1,200 mg/L oil and 3,000 to 4,400 mg/L biological oxygen demand (BOD).
JOURNAL OF OLEO SCIENCE
(2023)
Article
Ecology
Mar Benavides, Louis Conradt, Sophie Bonnet, Ilana Berman-Frank, Stephanie Barrillon, Anne Petrenko, Andrea Doglioli
Summary: The study reports a unique case of worker-dependent microbiota in the ant Diacamma cf. indicum from Japan. The dominant bacterium is found in the hindgut of workers but is scarce or absent in the reproductive castes, indicating a novel pattern of ant-associated bacterial symbiosis.
ISME COMMUNICATIONS
(2021)
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.
