Article
Environmental Sciences
Shishi He, Zhirong Zhao, Zhichao Tian, Chi Xu, Yuan Liu, Da He, Yinghui Zhang, Maosheng Zheng
Summary: This study analyzed activated sludge samples from municipal and industrial wastewater treatment plants and found that comammox bacteria were more abundant than ammonia-oxidizing bacteria and ammonia-oxidizing archaea in municipal plants, while this trend did not hold true for industrial plants. Furthermore, a higher diversity of comammox bacteria was found in municipal samples. This study provides important insights into the abundance and diversity of comammox bacteria in municipal and refinery wastewater treatment systems.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Agricultural Engineering
Lin Zhao, Guiping Fu, Jinfa Wu, Weicheng Pang, Zhangli Hu
Summary: Research demonstrates that in treating saline wastewater, ammonia-oxidizing archaea, Nitrosomonas, and Nitrospira are key groups for efficient nitrification in constructed wetlands, while aerobic-denitrifying bacteria and sulfur-driven denitrifiers are core denitrification groups.
BIORESOURCE TECHNOLOGY
(2021)
Article
Soil Science
Zhen Zhen, Gaoyang Li, Yijie Chen, Ting Wei, Huijun Li, Fengcheng Huang, Yongxiang Huang, Lei Ren, Yanqiu Liang, Dayi Zhang, Zhong Lin, Zhe Li
Summary: Plantations of saline-alkali tolerant rice in coastal areas are proposed to improve rice yield and ensure food security. This study investigated the effects of saline-alkali tolerant rice cultivation on the nitrification process in coastal solonchaks. The results showed that the abundance and nitrification rates of AOA and AOB decreased with increasing salinity, but increased significantly in the rice rhizosphere. Saline-alkali tolerant rice cultivation enhanced the nitrification process of the soil by increasing the nitrification contribution of AOB.
APPLIED SOIL ECOLOGY
(2023)
Article
Agricultural Engineering
Jun-Gyu Park, Beom Lee, Tae-Young Heo, A-In Cheon, Hang-Bae Jun
Summary: This study analyzed the community structure and function of nitrification microorganisms in nitrogen removal processes, revealing higher quantities of ammonia-oxidizing archaea in the oxidation ditch compared to A2/O, with complete ammonia oxidizers only found in the former. The longer retention times in the oxidation ditch process were more effective in promoting the proliferation of novel nitrifying microorganisms and nitrogen removal.
BIORESOURCE TECHNOLOGY
(2021)
Article
Soil Science
Haiyang Liu, Shengnan Zhang, Wei Xu, Hongen Liu, Jiangye Li, Jizheng He, Wenfeng Tan
Summary: The discovery of complete ammonia oxidizers has revolutionized our understanding of two-step nitrification. Previous studies have suggested that these organisms may outcompete canonical ammonia oxidizers under ammonia-limited conditions. However, there is currently no convincing evidence linking their activity to nitrification in acidic soils.
BIOLOGY AND FERTILITY OF SOILS
(2023)
Article
Biodiversity Conservation
Weifang Hu, Mianrun Chen, Xue Lan, Guoliang Li, Bin Wang, Dong Yao Sun, Xianbiao Lin
Summary: This study found significant shifts in potential ammonia oxidation rates (PARs) and gene abundances of ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA) along different salinity gradients. The PARs were higher under high salinity conditions, and the AOB gene abundance was greater than AOA under moderate and high salinity. This has important implications for nitrogen cycling in estuarine sediments.
ECOLOGICAL INDICATORS
(2022)
Article
Biotechnology & Applied Microbiology
Jiehui Xie, Jia Yan, Huixian He, Dongjiao Lin, Yuanyi Chen, Yizhuo Li, Xuan Huang, Hongguo Zhang
Summary: AOA may have an important role in nitrogen removal in SBR WWTPs and outcompete AOB. Key factors for AOA dominance include long sludge retention time, intermittent aeration, high ammonium concentration, and pH resistance.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2021)
Article
Microbiology
Anna N. Rasmussen, Christopher A. Francis
Summary: Ammonia-oxidizing archaea (AOA) play a crucial role in the transformation of ammonia in aquatic environments worldwide, especially in nutrient-rich coastal and estuarine waters like San Francisco Bay. A study found a significant AOA bloom in the southern part of San Francisco Bay, which coincided with high nitrite concentrations. Analysis of AOA genomes revealed their streamlined structure and specific genomic characteristics. These findings provide important insights into the understanding of AOA blooms.
Article
Agronomy
Xingjia He, Sen Li, Fengzhi Wu
Summary: Intercropping has a significant impact on soil properties and microbial communities, with different intercropping systems affecting ammonia-oxidizing microorganisms differently in different seasons. Soil physicochemical state, PNR, AOA and AOB communities were significantly altered by intercropping, with seasonal variation playing a greater role in shaping the community structures.
Article
Biotechnology & Applied Microbiology
Jing Lu, Yiguo Hong, Ying Wei, Ji-Dong Gu, Jiapeng Wu, Yu Wang, Fei Ye, Jih-Gaw Lin
Summary: The study analyzed the rates of ammonia oxidation (AO) and nitrite oxidation (NO) in the activated sludge from Xinfeng WWTPs, revealing strong activity of both processes. The research also identified AOB and Nitrospira as the main catalysts for nitrification in anammox-inoculated WWTPs, leading to efficient nitrogen removal.
Article
Multidisciplinary Sciences
Ronnakrit Rattanasriampaipong, Yi Ge Zhang, Ann Pearson, Brian P. Hedlund, Shuang Zhang
Summary: Archaeal membrane lipids, specifically the GDGTs, can be used to reconstruct ancient temperatures and provide insights into the ecology and evolution of marine ammonia-oxidizing archaea (AOA). The study identified thermal and nonthermal behaviors of GDGTs, which can be used as indicators of environmental temperature. The distribution of GDGTs in AOA cultures and shallow water samples followed a temperature-dependent trend, while deep water samples showed a nonthermal behavior. Statistical analysis revealed long-term trends in GDGT-2/GDGT-3 ratios, suggesting a suppression of deep water marine AOA during greenhouse climates in the Mesozoic and early Cenozoic periods.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Environmental Sciences
Preeyaporn Pornkulwat, Eakalak Khan, Sorawit Powtongsook, Wuttichai Mhuantong, Chamorn Chawengkijwanich, Tawan Limpiyakorn
Summary: This study comprehensively investigated the impacts of ammonia and salinity on culturing nitrifying microorganisms and successfully formulated nitrifying cultures for different recirculating aquaculture system (RAS) types. The findings suggest that cultures prepared at low ammonia loading rates are most suitable for various RAS types, while cultures prepared at high ammonia loading rates are dominated by nitrifying microorganisms with low substrate affinity.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Soil Science
Haiyang Liu, Hangwei Hu, Xing Huang, Tida Ge, Yongfu Li, Zhenke Zhu, Xingmei Liu, Wenfeng Tan, Zhongjun Jia, Hongjie Di, Jianming Xu, Yong Li
Summary: Chemoautotrophic canonical ammonia-oxidizers play a significant role in autotrophic nitrification during the mineralization of organic substances with low C/N ratios in paddy soils, as shown by N-15 tracing and DNA-SIP techniques.
SOIL BIOLOGY & BIOCHEMISTRY
(2021)
Article
Microbiology
Juliet Johnston, Zhe Du, Sebastian Behrens
Summary: The diverse microbial community of activated sludge used in biological treatment systems exhibits seasonal shifts in composition and activity. This study explores the relationship between community structure and transcriptional activity of ammonia-oxidizing bacteria during cold temperature nitrification failure in full-scale sequencing batch reactors treating municipal wastewater. The results show that the community composition of ammonia oxidizers does not change significantly between seasons, but there are differences in transcript copy numbers. Some nitrifiers remain active at wastewater temperatures below 15 degrees C.
MICROBIOLOGY SPECTRUM
(2023)
Article
Biotechnology & Applied Microbiology
Elizabeth French, Jessica A. Kozlowski, Annette Bollmann
Summary: The study found that ammonia-oxidizing archaea are more abundant in systems with low ammonium availabilities, while ammonia-oxidizing bacteria are more abundant when ammonium availability increases. Population dynamics of ammonia oxidizers may shift in response to changes in ammonium concentrations.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2021)
Article
Thermodynamics
Jiayang Zheng, Yanzhou Qin, Qiaoyu Guo, Zizhe Dong, Changrong Zhu, Yulin Wang
Summary: This study combines a random forest-trained surrogate model with a genetic algorithm to optimize the block structure of a novel two-block flow channel. The results show that the optimized parameters have good performance and are validated by the physical model.
INTERNATIONAL JOURNAL OF GREEN ENERGY
(2023)
Article
Thermodynamics
Yulong Zhao, Mingjie Lu, Yanzhe Li, Yulin Wang, Minghui Ge
Summary: This study investigates the effect of inserting a perforated plate on the performance of an exhaust thermoelectric generator through the construction of a mathematical model. The findings show that the insertion of the perforated plate increases the output power of the generator and an optimal installation position exists. Furthermore, the position of the perforated plate affects the voltage evenness of the modules, with the most uniform voltage distribution observed when the plate is in the middle of the third row of modules.
Article
Engineering, Environmental
Yue Huang, Japhet Cheuk-Fung Law, Yulin Wang, Yu Deng, Lei Liu, Yulin Zhang, Jiahui Ding, Yu Yang, Kelvin Sze-Yin Leung, Tong Zhang
Summary: In this study, complete and efficient biodegradation of sucralose was achieved using enriched consortia seeded with activated sludge. The microbial communities in the enriched consortia were dominated by Proteobacteria, Bacteroidota, Chloroflexota, and Planctomycetota. Genome-centric analysis suggested that species from UBA11579 and Polyangiaceae may play a role in sucralose biodegradation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Ling Yuan, Feng Ju
Summary: Viruses play a role in biogeochemical cycles by infecting cells and affecting cell metabolism through virus-encoded auxiliary metabolic genes (vAMGs). This study identified 752 viral genomes and 101 vAMGs involved in various metabolic pathways in wastewater treatment plants (WWTPs). The vAMGs potentially mediate microbial carbon and nutrient cycling, and may have important effects on the engineering of wastewater treatment processes.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Ecology
Lu Zhang, Xinyu Huang, Jizhong Zhou, Feng Ju
Summary: This study uses stable isotope probing to identify diverse uncultivated predatory bacteria in activated sludge microbiota and finds Myxococcota species to be prevalent and potentially influential in wastewater treatment processes.
Article
Engineering, Environmental
Moran Tang, Qian Chen, Haohui Zhong, Feng Ju, Yang Wu, Jingrun Hu, Si Li, Weiling Sun
Summary: This study investigated the impact of biotic and abiotic factors on the antibiotic resistance gene profile in saline groundwater. The results showed significant variation in the abundance and composition of antibiotic resistance genes in the resistome, which were influenced by microbiota diversity, antibiotics, and environmental variables. The potential for horizontal gene transfer of the resistome decreased in high-salinity groundwater. These findings provide important insights into the management of antimicrobial resistance in saline groundwater.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Lin Zhu, Ling Yuan, Xin-Yi Shuai, Ze-Jun Lin, Yu-Jie Sun, Zhen-Chao Zhou, Ling-Xuan Meng, Feng Ju, Hong Chen
Summary: Hospital wastewater treatment system is an important source and environmental reservoir of clinically relevant antibiotic resistance genes (ARGs), but how the resistome of clinical wastewater changes in the system is poorly understood.
Article
Endocrinology & Metabolism
Linan Ren, Yao Wang, Feng Ju, Meixin Sun, Xiaokun Gang, Guixia Wang
Summary: This study used bidirectional Mendelian randomization to investigate the causal relationship between sarcopenia and diabetic nephropathy (DN). The results suggest that a decrease in appendicular lean mass increases the risk of developing DN, while DN progression is associated with reduced grip strength. However, there is no overall causal relationship between sarcopenia and DN.
FRONTIERS IN ENDOCRINOLOGY
(2023)
Article
Engineering, Environmental
Yulin Wang, Liangzhu Zhang, Pengyang Qu, Cheng Lian, Kai Huang, Haiping Su, Honglai Liu
Summary: CoTe2 shows strong adsorption and conversion ability for lithium polytellurides, making it a promising cathode material for Li-Te batteries.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Ecology
Jangwoo Lee, Feng Ju, Karin Beck, Helmut Burgmann
Summary: Wastewater treatment plants (WWTPs) are important sources of antimicrobial resistance genes (ARGs) that can impact microbial communities in river ecosystems. This study found that the resistomes of wastewater and river water were more similar than other habitats, and river water was the most impacted habitat. The sulfonamide, beta-lactam, and aminoglycoside resistance genes were the most abundant in WWTP effluents, and some genes showed increased abundance in downstream river water. However, there was no evidence of accumulation or enrichment of ARGs in sediment, biofilm, and amphipod gut habitats.
Article
Chemistry, Applied
Hao Zhang, Liang Cheng, Feng Ju
Summary: Residues ASN94 and GLN41 were found to have the highest frequency in molecular docking tests. The geraniin-glycoprotein D(gD) complex displayed good stability with an RMSD value below 0.3 nm. Molecular dynamic (MD) simulations showed stable hydrogen bonding between gD and geraniin. The inhibitory rate of geraniin against HIV-TAT coinfected HSV-2 was significantly decreased.
NATURAL PRODUCT RESEARCH
(2023)
Article
Energy & Fuels
Minghui Ge, Zhiwei Xuan, Chenyang Zhao, Ding Luo, Yulin Wang, Yanzhe Li, Yulong Zhao
Summary: A new type of internal-arc thermoelectric leg is proposed to overcome the contradictory relationship between thermoelectric efficiency and thermal stress in solar thermoelectric generators (STEGs). The new leg shows excellent power output and lower thermal stress compared to the rectangular leg. The best configuration for STEGs depends on the concentration ratio, with the X-type leg preferred for lower ratios and the inner-arc type preferred for higher ratios. Further optimization of the inner-arc type leg can significantly increase the critical power density.
Article
Engineering, Environmental
Ze Zhao, Lu Zhang, Guoqing Zhang, Han Gao, Xiaogang Chen, Ling Li, Feng Ju
Summary: Tidal hydrodynamics play a significant role in groundwater-seawater exchange and microbiota structure in coastal zones. This study investigates the response of coastal water microbiota to tidal fluctuations and anthropogenic disturbances, providing valuable insights for biogeochemical cycles and coastal water quality. The findings show rhythmic patterns of microbiota structure in response to daily and monthly tidal fluctuations, with different microbial communities in groundwater and surface water.
Article
Biology
Limin Lin, Feng Ju
Summary: This study evaluated the suitability of different 16S rRNA gene primers and reference databases for microbiota profiling. The results showed that MiDAS 4.8 database and V4 region are recommended for best simultaneous analysis of bacterial and archaeal community diversity and structure.
Article
Energy & Fuels
Yulin Wang, Chao Guan, Hua Li, Yulong Zhao, Cheng Wang, Wei He
Summary: A newly modified parallel flow field configuration (MPFFC) is proposed to maximize the power performance of a 108 cm2 hydrogen polymer electrolyte membrane fuel cell (PEMFC). By optimizing the structural parameters, the new MPFFC achieves superior power performance, uniform distribution of parameters, and reduced pressure loss along the channel compared to a conventional parallel flow field configuration.