Article
Ecology
M. I. Vega De Lille, M. A. Hernandez Cardona, Y. A. Tzakum Xicum, G. Giacoman-Vallejos, C. A. Quintal-Franco
Summary: The study evaluated the performance of a domestic wastewater treatment system using hybrid constructed wetlands under tropical climate. Regardless of plant selection and contact time, the systems were able to remove over 92% of organic matter, 88% of TSS, and 99% of pathogens. To achieve efficient nutrient removal, a combination of 4-day contact time and vegetation was necessary. Recirculation strategies were also evaluated to enhance nitrogen removal, with satisfactory results achieved by combining RS2 with the plant species Typha dominguensis.
ECOLOGICAL ENGINEERING
(2021)
Article
Biotechnology & Applied Microbiology
Cen Yang, Tianling Fu, Hu Wang, Ruiying Chen, Bing Wang, Tengbing He, Yongfei Pi, Jiajia Zhou, Tianchang Liang, Miao Chen
Summary: This study constructed an effluent recirculation vertical subsurface flow constructed wetlands system for treating landfill leachate. The results showed that the wetlands system effectively removed organic pollutants in the leachate, with over 85% removal rate for conventional pollutants and relatively high removal rates for organic micro-pollutants such as OCPs, OPPs, PAHs, and VOCs.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Environmental Sciences
Yungui Li, Xueying Bai, Ruonan Ding, Wenxuan Lv, Ying Long, Liang Wei, Fachun Xiang, Rong Wang
Summary: This study investigated the sorption characteristics of natural manganese ore (NM) and its removal efficiency of ammonium and phosphorus from WWTP effluent in a simulated vertical flow NM constructed wetland (NM-VFCW). The results showed that NM could effectively sorb ammonium and phosphorus with a high removal efficiency, particularly for phosphorus. The manganese ore sand is highlighted as a powerful substrate for simultaneous advanced removal of phosphorus and ammonium in constructed wetland systems.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
M. Sanchez, I. Ruiz, M. Soto
Summary: Constructed wetlands are a promising decentralised wastewater treatment technology that is suitable for single-family homes, rural or peri-urban areas, and low-income areas. This study combines a new anaerobic/anoxic digester with a vertical subsurface constructed wetland for the first time, achieving high overall removal efficiency of organic matter and nitrogen.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Jose A. Herrera-Melian, Rayco Guedes-Alonso, Jean Carlos Tite-Lescano, Zoraida Sosa-Ferrera, Jose J. Santana-Rodriguez
Summary: Emerging organic micropollutants, especially pharmaceutical residues, pose a threat to aquatic environments. Natural wastewater treatment systems can partially remove pharmaceuticals, but effluent recirculation can significantly improve removal, especially in water-scarce regions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Tanveer Saeed, Md Jihad Miah, Nehreen Majed, Md Kawser Alam, Tanbir Khan
Summary: Landfill leachate treatment is challenging due to the complex chemical composition. This study identified factors associated with improved removal performance in wetland systems dosed with landfill leachate, with effluent recirculation playing a key role in adjusting composition and enhancing removal performance. Organic and nutrient removal in the hybrid wetlands primarily relied on adsorption, microbial degradation, and plant uptake, with different removal pathways affected by the imbalanced pollutant composition ratio.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Naveen Chand, Surindra Suthar, Kapil Kumar, Vinay Kumar Tyagi
Summary: This study investigated the efficiency of Colocasia and cattle dung biochar in a constructed wetland for domestic wastewater treatment. Results showed that the VSSFCW with biochar addition had higher removal efficiencies for COD, nitrate, ammonium, sulfate, phosphate, and total coliforms, with stable performance over a 40-day treatment period. Biochar amended VSSFCW also demonstrated advantages in terms of leaf area, biomass growth, N-uptake, and P-uptake rate.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Review
Environmental Sciences
Asmaa Masharqa, Sharaf Al-Tardeh, Rawan Mlih, Roland Bol
Summary: Developing safer and environmentally friendly methods for wastewater management is crucial worldwide. Constructed wetlands (CWs) have been effective and low-cost in treating polluted water. This review paper focuses on the efficiency of pollutant-removal from domestic wastewater using vertical flow constructed wetlands (VFCWs) and hybrid constructed wetlands (HCWs). The study shows that VFCW and HCW have similar performance in removing pollutants from domestic wastewater.
Article
Environmental Sciences
Yu Lei, Huub Rijnaarts, Alette Langenhoff
Summary: This study evaluated the removal of micropollutants in constructed wetlands with different configurations. The use of bark-biochar as a support matrix significantly enhanced the removal of irbesartan and carbamazepine. UVC irradiation as a pre-treatment was more effective in removing micropollutants than sunlight irradiation. After INC pre-treatment, less micropollutants accumulated in the plants in the subsequent wetland unit. The addition of activated sludge and aeration did not improve micropollutant removal. A bark-biochar based system combined with UVC pre-treatment showed better micropollutant removal than a conventional sand wetland.
Article
Green & Sustainable Science & Technology
Qian Wang, Jiewei Ding, Huijun Xie, Derek Hao, Yuanda Du, Congcong Zhao, Fei Xu, Qiang Kong, Baoshan Wang
Summary: The study found that using intertidal wetland sediments as a microbial source for CWs can effectively improve phosphorus removal rates, with bacteria such as phosphorus-accumulating organisms enhancing microbial transformation of phosphorus. However, the addition of IWS increased phosphorus loss via substrate accumulation and decreased phosphorus removal rate via plant uptake.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Arturo Montoya, Allan Tejeda, Belkis Sulbaran-Rangel, Florentina Zurita
Summary: This study evaluated the treatment of tequila vinasse (TV) in two types of constructed wetlands (CWs), showing similar high removal efficiencies for various pollutants. The highest removal percentages were obtained at 40% of dilution in both horizontal subsurface flow wetlands (HSSFWs) and vertical upflow wetlands (VUFWs). This research demonstrates the potential of CWs as an effective treatment system for TV.
WATER SCIENCE AND TECHNOLOGY
(2023)
Review
Environmental Sciences
Hengfeng Zhang, Xiaochang C. Wang, Yucong Zheng, Mawuli Dzakpasu
Summary: This review provides an overview of the use of constructed wetlands (CWs) for the removal of pharmaceutical active compounds (PhACs) from water environments. The results demonstrate that CWs perform equally or better than conventional wastewater treatment plants in eliminating PhACs, and highlight the importance of system design, operation, and environmental factors in this process. However, further research is required to address issues such as the behavior of emerging contaminants, identification of specific microorganisms, transformation pathways of pharmaceuticals, and the ecotoxicity evaluation of CWs effluents.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Green & Sustainable Science & Technology
Amrutashree Hota, S. Gopal Krishna Patro, Ahmed J. Obaid, Satish Khatak, Raghvendra Kumar
Summary: In recent years, Constructed Wetlands (CWs) have been used as a green and sustainable method for treating wastewater from industrial sources in smart cities. Particularly for small villages and isolated areas, CWs provide an energy- and land-efficient alternative to traditional treatment systems. This study aims to offer sustainable options for the effectiveness and use of CWs by evaluating their application and recent developments in their design and operation. The study also emphasizes the importance of future research in improving the sustainability and stability of CWs.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Green & Sustainable Science & Technology
Buthaina Mahfoud Al-Wahaibi, Tahereh Jafary, Abdullah Al-Mamun, Mahad Said Baawain, Mortaza Aghbashlo, Meisam Tabatabaei, Alexandros I. Stefanakis
Summary: A full-scale Vertical Flow Constructed Wetland (VFCW) project was implemented in Oman to provide a sustainable wastewater treatment solution. The study showed high removal rates for pollutants, but nitrogen removal still faced challenges, prompting the testing of various operational modifications to optimize treatment performance.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Agronomy
Paraskevas Parlakidis, Ioanna Gounari, Aristidis Georgiou, George Adamidis, Zisis Vryzas, Georgios D. Gikas
Summary: This study aims to investigate the efficiency of four pilot-scale horizontal subsurface flow constructed wetlands in remediating myclobutanil and triticonazole. The results show that the removal rate of the fungicides is influenced by the wetland design and plant species.
Article
Environmental Sciences
O. Arias, S. Vina, M. Soto
Summary: The addition of pig manure improved water content and carbon to nitrogen ratio in composting, while compaction and the addition of industrial sludge were necessary for stable compost. Proper control of thermophilic temperatures and matrix size can lead to desirable composting outcomes.
ENVIRONMENTAL TECHNOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Sandra Gonzalez-Rodriguez, Thelmo A. Lu-Chau, Alba Trueba-Santiso, Gemma Eibes, Maria Teresa Moreira
Summary: Enzymes have been proven to be effective biological catalysts in various industries. By utilizing agricultural residues as substrates, high amounts of enzymes can be produced, providing a cost-effective and sustainable solution for enzyme-based processes. In this study, a specific enzyme, manganese peroxidase (MnP), was successfully produced using wheat straw as a substrate in both solid-state and submerged fermentation. The enzyme cocktail also exhibited manganese-independent activity (MiP), indicating the presence of other enzymes such as short MnP and dye-decolorizing peroxidase (DyP). The production of ligninolytic enzymes was further enhanced in submerged fermentation, and the optimal conditions for enzyme production were determined. Additionally, the enzymes showed a high oxidative capacity, as demonstrated by the degradation of five emerging pollutants. The complete removal of certain pollutants, such as hormones and bisphenol A, was achieved in a short period of time, highlighting the potential of these enzymes for environmental applications.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2022)
Article
Energy & Fuels
J. Hidalgo-Crespo, C. M. Moreira, F. X. Jervis, M. Soto, J. L. Amaya, L. Banguera
Summary: The plastic industry is widespread globally, with increasing plastic waste generation that is considered a high impact pollutant. A study focused on the mechanical recycling of expanded polystyrene (EPS) to explore a circular economy model as a potential solution. The study assessed the potential environmental impacts of different valorization paths for food containers in Guayaquil, Ecuador, and found that recycling post-consumer EPS waste and adopting future electricity shares can significantly reduce environmental impacts.
Article
Energy & Fuels
J. Hidalgo-Crespo, S. Coello-Pisco, H. Reyes-Venegas, M. Bermeo-Garay, J. L. Amaya, M. Soto, A. Hidalgo-Crespo
Summary: The objective of this research is to analyze the relationship between an individual's political ideology and their environmental concern and pro-environmental behaviors and attitudes, and how these factors influence pro-electrical consumption attitudes. The study found a relationship between environmental concern and pro-electrical consumption attitudes, as well as a gradual decrease in concern and pro-environmental behaviors and attitudes from center ideology to extreme left and right. Additionally, environmental concern was found to strongly influence pro-environmental behaviors and attitudes.
Article
Environmental Sciences
Alba Trueba-Santiso, Jordi Palau, Jesica M. Soder-Walz, Teresa Vicent, Ernest Marco-Urrea
Summary: The biodegradation of lower chlorinated benzenes was assessed in a coastal aquifer, where monochlorobenzene and 1,4-dichlorobenzene were found to be degraded aerobically. However, anaerobic reductive dechlorination was not enhanced by the addition of lactate in the anaerobic microcosms. Carbon stable isotope analysis was suggested as a monitoring tool for aerobic remediation treatment of these chlorinated benzenes.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2022)
Article
Green & Sustainable Science & Technology
Jose Hidalgo-Crespo, Cesar Alvarez-Mendoza, Manuel Soto, Jorge Luis Amaya-Rivas
Summary: The objective of this study was to quantify, geo-locate, model, and characterize the generation of domestic used cooking oil (dUCO) in Guayaquil. Through data collection and analysis, the study determined the per capita daily dUCO generation rate and created a GIS map of dUCO hotspots. The findings highlighted the significant impact of household size and socioeconomic group on dUCO generation.
Article
Engineering, Environmental
David M. Kennes-Veiga, Alba Trueba-Santiso, Valentina Gallardo-Garay, Sabela Balboa, Marta Carballa, Juan M. Lema
Summary: This study investigated the impact of sulfamethoxazole (SMX) on microbial activities and enzymatic expression in activated sludge. Metaproteomic analysis showed that SMX slightly affected the microbial community structure, with an enhanced activity of the genus Corynebacterium at increased SMX concentrations. These findings suggest a potential role of Corynebacterium in mitigating SMX risks in bioreactors.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
M. Sanchez, D. R. Ramos, M. I. Fernandez, S. Aguilar, I. Ruiz, M. Canle, M. Soto
Summary: The study investigated the removal of emerging pollutants from municipal wastewater using a three-step pilot-scale system, showing promising results for the removal of various compounds.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Jordi Palau, Alba Trueba-Santiso, Rong Yu, Siti Hatijah Mortan, Orfan Shouakar-Stash, David L. Freedman, Kenneth Wasmund, Daniel Hunkeler, Ernest Marco-Urrea, Monica Rosell
Summary: This study investigates the dual C-Br isotope fractionation during in vivo biodegradation of 1,2-dibromoethane by two anaerobic enrichment cultures. Different reaction mechanisms were observed, providing valuable information for future biodegradation studies of 1,2-dibromoethane in contaminated sites.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Marta Sanchez, Maria Isabel Fernandez, Isabel Ruiz, Moises Canle, Manuel Soto
Summary: This study evaluated the performance of a three-step lab-scale system consisting of a hybrid digester, a vertical flow constructed wetland, and a photodegradation lamp. Different arrangements of the recirculation point were tested. The system achieved excellent removal of total suspended solids (TSS) and chemical oxygen demand (COD). Additionally, the system showed significant removal of various pharmaceutical and personal care products (PPCPs), with different removal mechanisms observed in different units of the system.
Article
Agricultural Engineering
Jan Struckmann Poulsen, Alba Trueba-Santiso, Juan M. Lema, Simon Gregersen Echers, Reinhard Wimmer, Jeppe Lund Nielsen
Summary: In this study, the biodegradability of PBAT monomers in thermophilic conditions was investigated using anaerobic digester sludge. 13C-labelled monomers and proteogenomics were used to track labelled carbon and identify the microorganisms involved in the process. Bacteroides, Ichthyobacterium, and Methanosarcina were found to be directly involved in the metabolization of at least one monomer.
BIORESOURCE TECHNOLOGY
(2023)
Article
Biochemical Research Methods
Sandra Gonzalez-Rodriguez, Alba Trueba-Santiso, Thelmo A. Lu-Chau, Maria Teresa Moreira, Gemma Eibes
Summary: This study focuses on the production of UPO by Agrocybe aegerita using by-products from bioethanol synthesis. Solid-state and submerged fermentations were compared, and the highest titers of UPO and laccase were achieved in submerged fermentation using vinasse as the nutrient source. Optimized UPO production of 331 U/L was obtained in 50% vinasse with a 14-day inoculum. These conditions were scaled-up to a 4 L reactor, resulting in a UPO activity of 265 U/L. Proteomic analysis revealed the expression of laccase, dye-decolorizing peroxidases, lectins, and proteins involved in reactive oxygen species production and control, in addition to UPO. Interestingly, the metabolism of complex sugars and nitrogen sources showed different activities at the beginning and end of submerged fermentation.
Article
Environmental Sciences
Kenneth Wasmund, Alba Trueba-Santiso, Teresa Vicent, Lorenz Adrian, Stephane Vuilleumier, Ernest Marco-Urrea
Summary: In this study, a novel DCM-degrading strain was obtained from a stable DCM-degrading consortium, and their proteome analysis revealed the significant role of mec-associated methyltransferases in anaerobic DCM metabolism.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Environmental Sciences
Marta Sanchez, Isabel Ruiz, Manuel Soto
Summary: The presence of emerging organic contaminants (EOCs) in the environment is increasing and requires effective removal technologies. This study reviews the behavior of EOCs during municipal wastewater treatment, particularly in constructed wetlands (CWs). It also explores their behavior in anaerobic digesters (ADs) and advanced oxidation processes, focusing on TiO2-based photocatalysis as a promising post-treatment. The elimination mechanisms in AD and CW treatment systems mainly involve sorption and biodegradation, while some contaminants remain recalcitrant.
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.
