Article
Environmental Sciences
Shamali De Silva, Andrew S. Ball, Esmaeil Shahsavari, Demidu Indrapala, Suzie M. Reichman
Summary: This study examined the impact of motor vehicle emissions on soil and microbial diversity, finding that bacterial diversity was higher than control sites while fungal diversity decreased with exposure time. Bacterial diversity increased across all road types, while fungal diversity decreased, potentially affecting the ecosystem functionality and health of roadside soils.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Agnieszka Cydzik-Kwiatkowska, Nadieh De Jonge, Jan Struckmann Poulsen, Jeppe Lund Nielsen
Summary: In this study, a gentle extraction approach combined with molecular analysis was used to investigate the composition and functions of microbes in aerobic granules from a wastewater treatment plant. The results revealed the presence of different functional bacteria in different layers of the granules, and the formation of microbial aggregates and extracellular polymeric substances played a crucial role in the structure of the granules.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Paniz Attarian, Nader Mokhtarani
Summary: The feasibility of aerobic cometabolism biodegradation of MTBE with a microbial consortium from a wastewater treatment plant in the presence of glucose growth substrate was investigated for in situ bioremediation. The results showed high MTBE and COD removal efficiencies under specific conditions, indicating that cometabolism in the presence of glucose growth substrate is recommended for in situ bioremediation of MTBE contaminated groundwater.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Agricultural Engineering
Yanjie Wei, Yuanyao Ye, Min Ji, Shitao Peng, Feifei Qin, Wenshan Guo, Huu Hao Ngo
Summary: This study utilized aerobic granular sludge technology to remove ammonium from landfill leachate, analyzing the stability of microbial community structures using PCR-DGGE technology. It was found that high nitrogen loading rates hindered ammonium removal, while low loading rates achieved satisfactory results, indicating the importance of stable wastewater treatment bioreactors in maintaining microbial community stability.
BIORESOURCE TECHNOLOGY
(2021)
Article
Microbiology
Philips O. Akinwole, Jinjun Kan, Louis A. Kaplan, Robert H. Findlay
Summary: Spatial and temporal variability are key attributes of sedimentary microbial communities, with larger distances having more dominant spatial effects on beta-diversity. Microeukaryotic photoautotrophs play a key role in structuring bacterial communities on streambed sediments. The study confirmed distinct microbial biogeography for headwater stream communities and highlighted the influence of environmental heterogeneity and geographical distance on microbial composition and spatial distribution.
MICROBIOLOGY SPECTRUM
(2021)
Article
Environmental Sciences
Chi-Wen Lin, Shu-Hui Liu, Cheng-Fang Wu, Shih-Hsien Chang
Summary: Studies have shown that toxic sulfolane can be found in groundwater near refinery and natural gas plants. The addition of a low dose of H2O2 and nutrient can enhance the removal of sulfolane and COD during bioremediation. Furthermore, the combination of H2O2 and nutrient can improve COD removal and reduce toxicity in effluents.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Lan Lin, Zibin Luo, Kyuto Ishida, Kampachiro Urasaki, Kengo Kubota, Yu-You Li
Summary: In this study, the start-up period of the anammox process was investigated using nitrification-denitrification sludge, and a successful start-up was achieved. The results showed high efficiency in nitrogen removal and significant improvements in granule properties, indicating the feasibility and importance of the anammox process for large-scale applications and sludge utilization.
Article
Green & Sustainable Science & Technology
Yufeng Zheng, Youliang Zhang, Ni An, Liangliang Shi, Yan Wei, Bin Ma
Summary: Granule-based partial denitrification and anammox (PDA) process is influenced by microbial community. It was found that the nitrogen conversion rate is affected by granule size through microbial composition. The abundance of anammox bacteria increased with particle size, while the abundance of denitrifiers decreased and then increased. The microbial composition also affected nitrogen removal and nitrite accumulation in the granules.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Environmental
Yi-Jing Shi, Lei Yang, Sheng-Fa Liao, Li-Guo Zhang, Zi-Cong Liao, Min-Yi Lan, Feng Sun, Guang-Guo Ying
Summary: This study found that under high levels of ammonium, aerobic granular sludge (AGS) showed good removal efficiency for three fluoroquinolones (FQs), with ciprofloxacin (CFX) and norfloxacin (NFX) being more effectively removed. Antibiotic resistance genes (ARGs) and mobile genetic elements (MGEs) related to FQs tended to exist in denitrifying bacteria, indicating a preference for denitrifiers in the distribution of these elements.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Agricultural Engineering
Tao Song, Xiaolei Zhang, Ji Li, Wanying Xie, Wenyi Dong, Hongjie Wang
Summary: This study investigated the effect of sulfamethoxazole (SMX) on aerobic granule sludge with filamentous bacteria (FAGS). The FAGS showed high tolerance to SMX, and stable operation was achieved with 2 µg/L of SMX addition. The removal efficiencies of NH4+, COD, and SMX remained above 80%, 85%, and 80% respectively. Both adsorption and biodegradation played important roles in SMX removal, and extracellular polymeric substances (EPS) were found to be involved in SMX removal and FAGS tolerance to SMX. The addition of SMX slightly affected the microorganism community, but increased the abundance of certain bacteria and sulfonamide resistance genes in FAGS.
BIORESOURCE TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Yingying Yang, Xueyang Hu, Xinyu Zhang, Xiurong Chen, Xiao Wei, Zhichong Chen, Hao Gu, Shanshan Linghu, Yuqing Gao
Summary: This study investigates the degradation of resorcinol in domestic coal gas wastewater by aerobic activated sludge. The results show that the effluent resorcinol concentration and chemical oxygen demand concentration tend to increase and then decrease with increasing influent resorcinol concentration. The study also identifies the dominant bacterial population involved in the degradation process.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Duanyi Huang, Rui Xu, Xiaoxu Sun, Yongbin Li, Enzong Xiao, Zhimin Xu, Qi Wang, Pin Gao, Zhaohui Yang, Hanzhi Lin, Weimin Sun
Summary: This study investigates the effects of Perfluorooctanoic acid (PFOA) on the microbial communities of activated sludge in wastewater treatment plants. The results show that continued exposure to PFOA leads to a decrease in microbial richness and substantial shifts in bacterial diversity and composition under both aerobic and anaerobic conditions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Taotao Tang, Ying Chen, Min Liu, Yi Zhang, Zhilong Yu
Summary: The study found that shortening the hydraulic retention time can enhance hydrogen production in an anaerobic inner cycle biohydrogen production reactor, mainly by promoting the growth of acetogenic bacteria.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Agricultural Engineering
Zichun Zhang, Huaikai Yang, Bin Wang, Chao Chen, Xiaoshuang Zou, Tuo Cheng, Jiang Li
Summary: The production of organic fertilizer through aerobic composting of cattle manure is an important method of resource utilization. This study examined the effects of adding mature compost on the decomposition and microbial communities during aerobic composting of cattle manure. The addition of mature compost shortened the composting cycle and resulted in a lignocellulosic degradation rate of 35%. Metagenomic analysis revealed that this was due to an increase in thermophilic and organic matter-degrading microorganisms, which enhanced the activity of carbohydrate-active enzymes. The microbial community exhibited stronger metabolic functions, particularly in carbohydrate and amino acid metabolism, driving the degradation of organic matter. This study deepens our understanding of organic matter conversion and microbial community metabolism in livestock manure composting using mature compost, offering a promising technology for livestock manure composting.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Hong Zhang, Zhixin Dou, Wenhui Bi, Chuanlun Yang, Xiuyun Wu, Lushan Wang
Summary: This study investigated the effects of sulfur metabolism on microbial communities and functional enzyme succession in aerobic fermentation systems using integrated multi-omics. The microbial sulfur-oxidizing system oxidized sulfur powder to S2O32-, which was subsequently oxidized to SO42-, leading to a pH decrease to 7.5 on day 7. The pH decrease favored the dominance of Novibacillus, which secreted metalloproteases and had more negatively charged amino acid residues on their surface for protein stability at low pH.
BIORESOURCE TECHNOLOGY
(2023)