Article
Biotechnology & Applied Microbiology
Sabita Ghimire-Kafle, Matt E. Weaver, Annette Bollmann
Summary: In this study, the comammox strain Nitrospira sp. BO4, obtained from Lake Burr Oak in Ohio, was characterized. It was found that Nitrospira sp.BO4 is a typical anaerobic bacterium capable of oxidizing ammonia to nitrate using nitrite as an intermediate. It showed the highest growth rates at low concentrations of ammonia, and its growth was inhibited by blue light while white light only slightly reduced its growth and red light had no effect. This research is important for understanding the physiological characteristics of anaerobic bacteria and the distribution and differentiation of different ammonia oxidizers in freshwater environments.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2023)
Article
Engineering, Environmental
Lei Qin, Pinzhong Feng, Shunni Zhu, Zhongbin Xu, Zhongming Wang
Summary: In this study, the feasibility of partial complete nitrification (PCN) in removing ammonia inhibition in high ammonia nitrogen wastewater was evaluated by constructing a biological aerated filter (BAFs) coupled microalgae culture system. The results showed that proper control of PCN was beneficial for microalgae growth and lipid production. Therefore, PCN can be an effective method for treating high ammonia nitrogen wastewater and improving the utilization efficiency of microalgae.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Review
Biotechnology & Applied Microbiology
Shanshan Meng, Xueji Liang, Tao Peng, Yongjin Liu, Hui Wang, Tongwang Huang, Ji-Dong Gu, Zhong Hu
Summary: This article reviews the importance of Comammox bacteria in studying nitrification and expanding the understanding of the nitrogen cycle. It highlights their crucial role in wastewater treatment and greenhouse gas flux in natural and engineered environments. However, there is limited research on the Comammox bacteria and their role in ammonia and nitrite oxidation in the environment. The review focuses on summarizing the genomes of Nitrospira in the NCBI database, discussing the ecological distribution and the influence of environmental parameters on this genus, and exploring their role in carbon, nitrogen, and sulfur cycles.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Leila Abbaszadeh, Eleni Koutra, Konstantina Tsigkou, Maria Gaspari, Panagiotis G. Kougias, Michael Kornaros
Summary: This study investigates the effects of short-term ammonia starvation on nitrogen uptake and transformation efficiency, as well as the performance of starved nitrifiers under various conditions. The accumulation of ammonia after short-term starvation might serve as an important strategy to restore the activity of ammonia-oxidizing bacteria (AOB) and can be applied in wastewater treatment for effective nitrogen removal and biomass utilization.
FERMENTATION-BASEL
(2022)
Article
Environmental Sciences
Dumsane Themba Matse, Paramsothy Jeyakumar, Peter Bishop, Christopher W. N. Anderson
Summary: This study investigated the effects of applying Cu-complexing compounds on nitrification rate, abundance of ammonia-oxidizing bacteria and archaea genes, and mineral nitrogen leaching in urine patches. The results showed that using organic compounds such as co-poly-acrylic-maleic acid and calcium lignosulphonate can significantly reduce the copper content in the soil, thereby reducing mineral nitrogen leaching.
ENVIRONMENTAL POLLUTION
(2023)
Article
Engineering, Chemical
Mingfei Shi, Haichao Duan, Liang Feng, Man Xiao, Qingyao He, Shuiping Yan
Summary: Using biomass ash as an alternative to alkali chemicals for pretreating anaerobic digestion effluent can reduce chemical consumption, increase ammonia separation factor, provide stable results, and have potential for agricultural applications. It also decreases greenhouse gas emissions and has economic advantages compared to the Haber-Bosch process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Environmental Sciences
Xin Li, Yongze Lu, Yue Chen, Guangcan Zhu, Raymond Jianxiong Zeng
Summary: The study suggests that methane-driven ammonia recovery can improve wastewater treatment efficiency, especially when intermittent aeration is used. The research found that intermittent aeration can constrain the growth of ammonia oxidizing bacteria and enhance the removal rate of ammonia.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Soil Science
Marcus O. Bello, Axel Aigle, Yiyu Meng, James Prosser, Cecile Gubry-Rangin
Summary: The study demonstrates that Ca. Nitrosocosmicus AOA growth increases with incubation temperature in soil, with an optimum of 25 degrees C. Additionally, growth of Ca. Nitrosocosmicus is greater when AOB are inhibited, especially under high NH4+ concentration. This indicates the tolerance of Ca. Nitrosocosmicus to high NH4+ concentration in soils, contradicting the accepted belief that AOA growth is inhibited in soil with high NH4+ concentration, and confirming the role of a near-neutrophilic AOA in nitrification activity in soil with higher nitrogen content.
SOIL BIOLOGY & BIOCHEMISTRY
(2021)
Article
Engineering, Environmental
Sarah Al-Ajeel, Emilie Spasov, Laura A. Sauder, Michelle M. McKnight, Josh D. Neufeld
Summary: Nitrification, the process of converting ammonia to nitrate, plays a significant role in engineered water treatment systems. Different microbial guilds participate in this process, however, their relative contributions to nitrogen cycling are still not well understood. Understanding the active nitrifiers is crucial for optimizing engineered systems that rely on nitrifiers for ammonia removal.
Article
Ecology
Yongping Kou, Chaonan Li, Bo Tu, Jiabao Li, Xiangzhen Li
Summary: The assembly mechanisms of ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) communities along an altitudinal gradient were investigated. The study found that the alpha-diversity of AOA communities decreased monotonically with increasing elevation, while a sinusoidal pattern was observed for AOB communities. Mean annual temperature was the most influential factor for the alpha-diversity of AOA communities, while plant richness, soil conductivity, and total nitrogen made comparable contributions to the alpha-diversity of AOB communities. Additionally, beta-diversity of AOA and AOB communities were divided into two distinct clusters by elevation, mainly attributed to soil pH and variations in plant richness. AOB communities contributed more to soil nitrification potential in the low-altitude section, while AOA communities were more important in the high-altitude section.
Article
Engineering, Environmental
Jia Meng, Zhetai Hu, Zhiyao Wang, Shihu Hu, Yanchen Liu, Hongguang Guo, Jianzheng Li, Zhiguo Yuan, Min Zheng
Summary: This study provides a comprehensive assessment of the novel acidic nitrification process and identifies the key factors governing stable nitrite accumulation. The results suggest that stable nitrite accumulation can be maintained under various influent and operational conditions as long as a ppm-level of free nitrous acid (FNA) is established. Furthermore, specific ammonia-oxidizing microbial communities were observed under these conditions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Huaihao Xu, Yuepeng Deng, Jie Zou, Kaoming Zhang, Xiuying Li, Yunhua Yang, Shuangqiu Huang, Zhao-Qing Liu, Zhu Wang, Chun Hu
Summary: This study investigated the response of a nitrification membrane bioreactor to an elevated ammonia loading rate. Effective nitrification performance was achieved under high loading, but became inefficient when ammonia concentration increased further. The study also found an enrichment of ammonia-oxidizing bacteria with increased loading.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Multidisciplinary Sciences
Khadim Dawar, Saif-ur-Rahman, Shah Fahad, Syed Sartaj Alam, Shah Alam Khan, Atif Dawar, Uzma Younis, Subhan Danish, Rahul Datta, Richard P. Dick
Summary: The study demonstrates that in semi-arid environments like in Pakistan, the use of biochar can effectively reduce N2O emissions, while simultaneously increasing wheat yield and nitrogen use efficiency.
SCIENTIFIC REPORTS
(2021)
Article
Biotechnology & Applied Microbiology
Shinichi Akizuki, German Cuevas-Rodriguez, Tatsuki Toda
Summary: This study found that adjusting biomass concentration can effectively enhance ammonia removal from high-strength ammonia wastewater in microalgal-nitrifying bacterial photobioreactors, where the removal rate of ammonia is strongly influenced by the influent free ammonia/biomass ratio.
BIOCHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Inorganic & Nuclear
D. Deivatamil, John Abel Martin Mark, S. Sivaranjani, Thiruneelakandan Raghavan, Joseph Prince Jesuraj
Summary: This work successfully developed semiconductor metal oxide nanoparticles for detecting toxic gases, with findings showing that the sensitivity of the samples increased with higher concentrations of Cu2+ ions and gas ppm, although the recovery time also increased.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Engineering, Chemical
M. Hammad Khan, Donghwan Ha, Daehee Choi, Jinyoung Jung
DESALINATION AND WATER TREATMENT
(2016)
Article
Chemistry, Physical
Daehee Choi, Dongryeol Lee, Wonsang Yun, Jinyoung Jung
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2017)
Article
Environmental Sciences
Daehee Choi, Sukhyun Cho, Jinyoung Jung
Article
Biotechnology & Applied Microbiology
M. Hammad Khan, Daehee Choi, Kyungjin Cho, Jinyoung Jung
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2018)
Article
Biotechnology & Applied Microbiology
Daehee Choi, M. Hammad Khan, Jinyoung Jung
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2019)
Article
Engineering, Environmental
Daehee Choi, Kyungjin Cho, Jinyoung Jung
Article
Agricultural Engineering
Daehee Choi, Chulwoo Lee, Jinyoung Jung
BIORESOURCE TECHNOLOGY
(2020)
Article
Environmental Sciences
Daehee Choi, Kyungjin Cho, Kwanghyun Hwang, Wonsang Yun, Jinyoung Jung
Summary: This study successfully achieved mainstream partial nitritation (PN)-anaerobic ammonium oxidation (ANAMMOX) system with selective recovery of ammonia-oxidizing bacteria (AOB) activity through a high-temperature shock strategy, leading to an increased nitrogen removal efficiency.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Daehee Choi, Hojin Shin, Jinyoung Jung
Summary: This study evaluated a three-stage deammonification process for treating mature leachate. The results showed that the ANAMMOX activity was severely inhibited without an internal recycle, but implementing the recycle helped alleviate the inhibition effects and improve nitrogen removal efficiency.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Biotechnology & Applied Microbiology
Shaofeng Zhou, Wenwen An, Cuifen Gan, Meiying Xu
Summary: Bacteria generate and release extracellular reactive oxygen species (eROS), which significantly contribute to the natural ROS pool and play a crucial role in metabolic interactions of bacteria with their environment. Understanding the behavior of eROS-generating bacteria and its environmental implications is of great importance in the cycling of biogeochemical elements, transformation of organic matter, and regulation of antibiotic resistance genes.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Ji-Dong Gu, Tim Ford, Bryce Mitton, Ralph Mitchell
Summary: Plastics and microplastics are widely present and accumulating in the environment, leading to increasing public attention. In addition to packaging plastics, materials from industries such as electronics, space and aviation are also accumulating, but receiving less attention. The production of degradable and biodegradable plastics is seen as a way to reduce environmental impacts, but enhancing the non-degradability of functional polymers is also a feasible option. Microbial colonization and deterioration pose significant challenges to these materials.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Justyna Bohacz, Michal Mozejko
Summary: This study evaluated the keratinolytic activity of 37 strains of Trichophyton ajelloi and found that pigmented strains isolated from loamy soil were more efficient in degrading native feather keratin, while non-pigmented strains isolated from chernozem showed better abilities. The keratinolytic activity increased over time, as evidenced by the increase in extracellular keratinase activity and release of soluble proteins and peptides. Protease activity peaked in the first 7 days and again on day 28 of culture. The release of ammonium and sulfate ions, associated with an increase in pH, reached its maximum on day 21. Three pigment-producing strains were among the most active in releasing large amounts of ammonium and sulfate ions. The biodegradation of feather waste by Trichophyton ajelloi strains can be used to produce fertilizers suitable for plants with high sulfur requirements.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Joseph M. Suflita, Brenda J. Little
Summary: This article reviews the major achievements of the International Biodeterioration & Biodegradation Society (IBBS) on its 50th anniversary and provides recommendations for addressing new challenges and developments based on personal experiences.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Zhenyan Lin, Tuo Jin, Xin Xu, Xiao Yin, Dan Zhang, Mengjiao Geng, Chunyu Pang, Gongwen Luo, Lizhi Xiong, Jianwei Peng, Jiangchi Fei
Summary: The incomplete recycle of residual mulch film (RMF) in recent years has led to an increase in plastic fragments in soil, posing a serious threat to the soil ecological environment. In this study, seven potential plastic-degrading microorganisms were screened and identified from film-mulched vegetable fields. The degradation ability experiments showed that both single strains and mixed strains demonstrated varying levels of degradation of RMF.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Tiina Belt, Michael Altgen, Muhammad Awais, Martin Nopens, Lauri Rautkari
Summary: This study investigated the degradation of heat-treated wood by brown rot fungi and found that the decay increased the hygroscopicity of wood in the decaying state. Furthermore, it was observed that heat-treated samples were more susceptible to fungal decay compared to untreated samples, which may be related to the increase in moisture content.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Marta Cicardi, Davide Bernasconi, Luca Martire, Linda Pastero, Giulia Caneva, Sergio E. Favero-Longo
Summary: This study investigated the phenomenon of Centimetric circular areas Uncolonized by Microbial Biofilms (CUMBs) on natural and heritage stone surfaces. The analysis revealed a compatibility in distribution and size between CUMBs and lichen thalli, suggesting a lichen origin for some CUMBs. Microscopic analysis also showed similar modifications in marble layers beneath CUMBs and lichens, indicating a possible alteration of stone properties by lichens.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)