Article
Agricultural Engineering
Mathu Indren, Cristian H. Birzer, Stephen P. Kidd, Tony Hall, Paul R. Medwell
Summary: The study demonstrates that high dosages of pristine biochar can improve the performance of high-solids anaerobic digesters, while low dosages and re-used biochar may not have significant effects.
BIOMASS & BIOENERGY
(2021)
Article
Agricultural Engineering
Zahra Al Hasani, Jagdeep Kumar Nayak, Halima Alhimali, Abdullah Al-Mamun
Summary: The study found that the use of conductive additive GAC/nZVI in anaerobic digestion process can significantly increase the biogas production and methane generation, as well as improve the removal rate of COD.
BIORESOURCE TECHNOLOGY
(2022)
Article
Chemistry, Physical
Marina Tomasini, Mariana De Oliveira Faber, Viridiana Santana Ferreira-Leitao
Summary: Sugarcane straw is not effectively utilized in the industry currently, but sugarcane straw hemicellulose hydrolyzate (HH) shows promise as a raw material for H2 and CH4 production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Thermodynamics
Kavosh Karami, Keikhosro Karimi, Safoora Mirmohamadsadeghi, Rajeev Kumar
Summary: This study investigated the effects of biological pretreatment on biogas production from lignocellulosic biomass and studied the combination effect with other pretreatment methods. The results showed that aerobic digestion was the only pretreatment method that could individually improve methane yield from pinewood, but combining aerobic digestion with mild thermochemical pretreatment could achieve even higher methane yield.
Article
Engineering, Environmental
F. Granzotto, C. Aita, D. D. Silveira, F. D. Mayer, S. B. Pujol, J. A. Pinas, R. Hoffmann
Summary: Anaerobic digestion proved to be an efficient method for treating organic wastes from university restaurants, achieving high removal rates of pollutants and producing biogas and digestate for potential use as organic fertilizer.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Eun Seo Lee, Seon Yeong Park, Chang Gyun Kim
Summary: This study attempted to convert surplus hydrogen to methane through anaerobic digestion by hydrogenotrophic methanogen, aiming to overcome the drawbacks of hydrogen escaping from small or middle-scale industries. A biochemical methane potential test was conducted by injecting hydrogen and carbon dioxide directly into the reactors for 30 days. The results showed an increase in cumulative methane yield and methane content in the biogas, with a significant improvement in the quality of biogas. Microbial community analysis indicated that hydrogenotrophic methanogenesis played a dominant role in enhancing methane production.
Article
Engineering, Environmental
Bikash R. Tiwari, Satinder Kaur Brar, Rao Y. Surampalli
Summary: Thermophilic anaerobic digestion is a viable strategy to reduce municipal sludge volume and generate renewable energy. In this study, ultrasonication was found to be the best pretreatment method to enhance the digestion process.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Maycoll Romero-Guiza, Miriam Peces, Ruben Asiain-Mira, Jordi Palatsi, Sergi Astals
Summary: Research on foaming processes in wastewater treatment plants anaerobic digesters has provided valuable insights on the causes and mitigation strategies of foam episodes. Microbial community analysis has shown the correlation between foaming episodes and specific microbial populations. Laboratory experiments have demonstrated the positive impact of increasing anaerobic digestion temperature and sludge pre-treatments on foam biodegradability. Techno-economic analysis has highlighted the significant cost implications and energy self-sufficiency decrease associated with foaming episodes in WWTPs.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Review
Environmental Sciences
Luong N. Nguyen, Jeevan Kumar, Minh T. Vu, Johir A. H. Mohammed, Nirenkumar Pathak, Audrey S. Commault, Donna Sutherland, Jakub Zdarta, Vinay Kumar Tyagi, Long D. Nghiem
Summary: Anaerobic co-digestion (AcoD) and biogas upgrade have enabled many wastewater treatment plants to become net energy producers. While water scrubbing is currently the most widely used technology, significant market growth in membrane separation has been observed, with further advancements in materials engineering and sciences expected to enhance membrane separation competitiveness in biogas upgrading.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Chemistry, Physical
Devaraj Thiruselvi, Ponnusamy Senthil Kumar, Madhava Anil Kumar, Chyi-How Lay, Salma Aathika, Yuvarani Mani, D. Jagadiswary, Anuradha Dhanasekaran, Palaniyandi Shanmugam, Subramanian Sivanesan, Pau-Loke Show
Summary: The review discusses the significance of renewable biogas production technology in reducing greenhouse gas emissions and addressing global warming, highlighting the importance of sustainable techniques in meeting energy demands. Anaerobic digestion for biogas production from waste is recognized as a leading green energy solution for environmental management and meeting global energy challenges.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Environmental Sciences
Jiaxin Chen, Ji Li, Bin Ye, Xiaolei Zhang, R. D. Tyagi, Xinlei Gao
Summary: Management of chicken manure in Morocco has become a focus due to the increasing demand for chicken and eggs. The bioconversion of chicken manure into biogas can reduce the amount of manure while generating clean energy. Comparing with co-firing, pyrolysis, and gasification, anaerobic digestion of chicken manure was found to be superior in terms of energy gain.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Rajagopal Malolan, Ramesh Sai Jayaraman, Srikanth Adithya, Jayaseelan Arun, Kannappan Panchamoorthy Gopinath, Panneer Selvam SundarRajan, Omaima Nasif, Woong Kim, Muthusamy Govarthanan
Summary: This study introduces a zero emission concept for waste disposal and explores the potential for renewable green energy production by utilizing a mixture of cow dung and chicken waste for biogas production. The study evaluates the impact of different proportions of waste mixtures and the addition of Chlorella pyrenoidosa co-substrate on biogas distribution and production efficiency.
Review
Environmental Sciences
Hamed Kazemi Shariat Panahi, Mona Dehhaghi, Gilles J. Guillemin, Vijai Kumar Gupta, Su Shiung Lam, Mortaza Aghbashlo, Meisam Tabatabaei
Summary: Anaerobic fungi have great potential in the biofuel and biogas industries for their ability to degrade lignocellulose. However, the engineering tools for anaerobic fungi have not been established yet. Pre-treatment of lignocellulose by anaerobic fungi can prevent carbohydrate loss and increase biogas production. Bioaugmentation with anaerobic fungi can significantly enhance methane biosynthesis. Nonetheless, novel genetic engineering techniques and tools are needed for the commercial anaerobic digestion process.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Review
Environmental Sciences
Sagarika Mothe, Venkateswara Rao Polisetty
Summary: This paper discusses the environmental and health hazards caused by burning rice straw waste, and proposes anaerobic digestion into biomethane gas and digestate as an effective technology. Co-digestion of rice straw with nitrogen-rich substrates is proven to balance the carbon to nitrogen ratio and increase biomethane yield.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Agricultural Engineering
Shuaishuai Ma, Hongliang Wang, Binshou Wang, Xiaohui Gu, Wanbin Zhu
Summary: The study demonstrated that pretreatment with CO2 and liquid digestate from anaerobic digestion can improve the glucose and xylose content of corn straw, reduce cellulose crystallinity, and increase methane yield. However, high temperature pretreatment resulted in the production of inhibitors that decreased methane production during subsequent anaerobic digestion. The changes in microbial community in the pretreated slurry at lower temperature were found to enhance the overall performance of anaerobic digestion.
BIORESOURCE TECHNOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Maria Gaspari, Merlin Alvarado-Morales, Panagiotis Tsapekos, Irini Angelidaki, Panagiotis Kougias
Summary: The application of mathematical models as tools and early warning indicators can optimize the anaerobic digestion process in biogas reactors. The Bioconversion Model (BioModel) was evaluated in this study for simulating common perturbation cases caused by fatty acids and ammonia inhibition. The simulations showed good agreement with experimental data on methane productivity and pH, but discrepancies were observed in the prediction of volatile fatty acids' concentrations. Adjustments to the model's kinetic parameters were necessary to improve the prediction accuracy. Overall, the BioModel demonstrated effectiveness in simulating different co-digestion strategies with fatty acid or ammonia presence.
BIOCHEMICAL ENGINEERING JOURNAL
(2023)
Review
Engineering, Environmental
Yao Zhang, Chunxing Li, Zengwei Yuan, Ruming Wang, Irini Angelidaki, Gefu Zhu
Summary: This review summarizes the roles of syntrophic bacteria and methanogens in the anaerobic digestion (AD) process, revealing the mechanisms of metabolism pathways, microbial characteristics, substrate oxidation, and electron transfer in syntrophic methanogenesis. The review also provides an overview of process control and optimization methods for improving the efficiency of syntrophic methanogenesis.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Syed Salman Ali Shah, Hyeona Park, Hyung-June Park, Jinwoo Kim, Irini Angelidaki, Changsoo Lee, Jeonghwan Kim, Kwang-Ho Choo
Summary: This study reports a novel composite biomedium composed of quorum quenching bacteria, porous silica, and polyelectrolytes for controlling membrane fouling in anaerobic membrane bioreactors (AnMBRs). The results show that the composite biomedium significantly delays membrane fouling and exhibits high durability. Moreover, the biomedium does not affect the anaerobic treatment performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Ehsan Sarlaki, Mohammad Hossein Kianmehr, Marzieh Ghorbani, Ali Mashaallah Kermani, Keyvan Asefpour Vakilian, Irini Angelidaki, Yajing Wang, Vijai Kumar Gupta, Junting Pan, Meisam Tabatabaei, Mortaza Aghbashlo
Summary: A cost-effective and energy-efficient nitro-humification process was developed for nitrogen functionalization and activation of lignite humic substances. Different metrics were determined for the processed lignite including solubility, physicochemical properties, oxidation degree, nitrogen functionalization, spectral ratios, and surface functionalization. The process showed improved solubility, balanced nitrogen binding forms, and enhanced carbon and nitrogen content. It also increased cation exchange capacity, carboxylic and phenolic groups, crystallinity index, and availability of macromicronutrients and rare earth elements.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Hyeona Park, Syed Salman Ali Shah, Gregory Korshin, Irini Angelidaki, Kwang-Ho Choo
Summary: This study investigates the impact of sunlight irradiation on membrane fouling, biopolymers, signal molecules, and microbial communities in MBRs. The results show that sunlight can degrade signal molecules that induce membrane biofouling. Sunlight exposure also leads to changes in microbial behavior and community composition in MBRs.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Environmental Sciences
Stanley A. Gorzelnik, Xinyu Zhu, Irini Angelidaki, Marja Koski, Borja Valverde-Perez
Summary: The study demonstrates the application of a two-step multitrophic process to assimilate residual nutrients into live feeds suitable for fish, using microalgae and Daphnia magna.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Agricultural Engineering
Eleftheria Papadopoulou, Charlene Vance, Paloma S. Rozene Vallespin, Panagiotis Tsapekos, Irini Angelidaki
Summary: Microbial fermentation combined with inexpensive biomass, such as Saccharina latissima hydrolysate, candy-factory waste, and digestate from full-scale biogas plant, can be used as an alternative to petroleum-based materials for lactic acid production. Lactic acid bacteria, including Enterococcus faecium, Lactobacillus plantarum, and Pediococcus pentosaceus, were able to utilize sugars released from seaweed hydrolysate and candy-waste. Seaweed hydrolysate and digestate also provided nutrients for microbial fermentation. A scaled-up co-fermentation of candy-waste and digestate resulted in a lactic acid concentration of 65.65 g/L and a productivity of 1.37 g/L/hour, demonstrating the successful production of lactic acid from low-cost industrial residues.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Benjamas Cheirsilp, Wageeporn Maneechote, Sirasit Srinuanpan, Irini Angelidaki
Summary: This review focuses on the microalgae contributions to Bio-Circular-Green (BCG) economy, discussing the zero-waste approaches for sustainable production and biorefineries of microalgal biomass. The review provides overviews of microalgae's contributions to wastewater upcycling and greenhouse gas capture, as well as summarizes various valuable products from microalgal biomass to emphasize their biorefinery potential. It also discusses key issues, future perspectives, and challenges for zero-waste microalgal biorefineries.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Alexandros Chatzis, Esteban Orellana, Maria Gaspari, Konstantinos Kontogiannopoulos, Laura Treu, Anastasios Zouboulis, Panagiotis G. Kougias
Summary: Packing materials play a significant role in improving the efficiency of biological methanation in Trickle Bed Reactors. This study evaluated the performance of pelletized activated carbon and Raschig rings as packing materials. Activated carbon outperformed Raschig rings by achieving higher methane purity, maintaining stable pH levels, and reducing gas retention time. The study also found that the digestate from biogas plants served as a sufficient nutrient source. The composition of the microbial community and the physical properties of packing materials contributed to maximizing the efficiency of biological methanation.
BIORESOURCE TECHNOLOGY
(2023)
Article
Biochemical Research Methods
Eleftheria Papadopoulou, Mari Cristina Rodriguez de Evgrafov, Argyro Kalea, Panagiotis Tsapekos, Irini Angelidaki
Summary: Three bacterial species were isolated from seaweed biomass and evolved to increasing concentrations of NaCl. Two of the evolved strains showed increased salt tolerance and were able to produce lactic acid in hypersaline seaweed hydrolysate. Mutations in genes affecting ion balance and cell membrane composition were observed in the evolved lineages.
Article
Engineering, Environmental
Zunjing Lv, Xiaofang Pan, Zhi-Long Ye, Irini Angelidaki, Nan Lv, Yanlin Li, Guanjing Cai, Lifeng Lin
Summary: The aim of this study was to reduce the risk of VFA accumulation and optimize anaerobic digestion by promoting the enrichment of homoacetogens. It was found that homoacetogens had a higher abundance at ambient temperature, which effectively reduced the risk of VFA accumulation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Farinaz Ebrahimian, Giovanna Lovato, Merlin Alvarado-Morales, Muhammad Tahir Ashraf, Jose Alberto Domingues Rodrigues, Panagiotis Tsapekos, Irini Angelidaki
Summary: This study examined the effect of trace metals on H2/CO2 biomethanation, finding that they are crucial for efficient methane production. During nutrient deprivation, the suppression of hydrogenotrophic archaea at higher gas rates led to a decrease in methane content and an increase in acetic acid concentration. After nutrient supplementation, increased concentrations of Co, Ni, and Fe were found to enhance methanogenic activity, resulting in high methane content and low acetic acid concentration. Mathematical modeling demonstrated that iron limitation suppressed hydrogenotrophic archaea, leading to hydrogen accumulation and the growth of homoacetogenic bacteria.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Antonios A. Lithourgidis, Thomas A. Kotsopoulos, Sotirios D. Kalamaras, Ioannis V. Skiadas, Mariusz Kuglarz, Francesco Vigato, Merlin Alvarado-Morales, Irini Angelidaki
Summary: This study aimed to assess the production of succinic acid using waste residual streams through fermentation, and investigate its process performance and purification methods. The results showed that the concentration and yield of succinic acid varied under different operating conditions. Furthermore, a successful downstream concept for SA purification was developed, achieving high purity and crystallization recovery.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Eleftheria Papadopoulou, Mayuki Cabrera Gonzalez, Daniela Reif, Amal Ahmed, Panagiotis Tsapekos, Irini Angelidaki, Michael Harasek
Summary: This study investigates the challenges of combining a low-cost feedstock with an optimized downstream strategy to achieve maximum recovery of high-purity lactic acid. The findings suggest that membrane separation technology is a viable method for separating lactic acid produced from a mixture of candy-waste and digestate, with pH as an important control factor.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
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.
