Article
Engineering, Environmental
Mingzhu Yang, Shuang Qiu, Lingfeng Wang, Zhipeng Chen, Yanbing Hu, Jianhua Guo, Shijian Ge
Summary: This study investigated the effects of light irradiation on the activities and physiological characteristics of ammonia-oxidizing bacteria and nitrite-oxidizing bacteria in activated sludge. The results showed that moderate light irradiation could enhance the activity of ammonia-oxidizing bacteria, while excessive light could inhibit the activities of both types of bacteria. These findings contribute to our understanding of the physiological responses of nitrifiers to short-term light irradiation and have implications for the development of sustainable wastewater treatment technologies.
Article
Engineering, Environmental
Dongdan Yuan, Lei Zheng, Yong-Xin Liu, Hongguang Cheng, Aizhong Ding, Xiaomin Wang, Qiuyang Tan, Xue Wang, Yuzi Xing, En Xie, Haoming Wu, Shanyun Wang, Guibing Zhu
Summary: Through the use of double tracer technique and metagenomic sequencing, we found that the production of N2O in plateau wetlands is promoted by nitrifier denitrification, with the key functional genes belonging to comammox bacteria Nitrospira nitrificans. The comammox bacterial species N. nitrificans and ammonia oxidizing bacterial species Nitrosomonas europaea cooperate to produce N2O in plateau wetland sediments. Environmental factors such as elevation and total organic matter influence the cooperation pattern via N. nitrificans, thus affecting N2O production activity in plateau wetland sediments.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Haochuan Chen, Zhenguo Chen, Songwei Zhou, Yongxing Chen, Xiaojun Wang
Summary: This study achieved stable partial nitritation-denitritation (PN) by using a zeolite biological fixed bed (ZBFB) reactor for the treatment of synthetic wastewater and printed circuit board (PCB) tail wastewater. The continuous desorption of ammonium from the zeolite inhibited free ammonia (FA), leading to stable and efficient nitrite accumulation. The results demonstrated the feasibility of using ZBFB for real wastewater treatment and promoted the development of energy-saving anammox process in industrial wastewater treatment.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Environmental Sciences
Xia Jia, Yunfeng Gao, Xiaodi Li, Yonghua Zhao, Lu Wang, Chunyan Zhang
Summary: This study investigated the impacts of elevated CO2 and cadmium levels on soil nitrification in the rhizosphere of Robinia pseudoacacia L. seedlings. The results showed that elevated CO2 combined with Cd pollution generally stimulated nitrification enzyme activities and influenced bacterial community structures.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
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)
Review
Engineering, Environmental
Shaoyi Xu, Xiaolong Wu, Huijie Lu
Summary: This review discusses the roles of nitrogen-cycling microorganisms in wastewater treatment, focusing on often overlooked microbes that are functionally important. Advancements in molecular technologies have enabled comprehensive studies on the application and potential of these microbes in nitrogen removal processes in wastewater treatment plants.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2021)
Article
Engineering, Environmental
Xin Tan, Yang Lu, Wen-Bo Nie, Guo-Jun Xie, Paul Evans, Xiao-Wei Wang, Cheng-Cheng Dang, Zhi-Cheng Zhao, Sheng-Qiang Fan, Nanqi Ren
Summary: This study demonstrates that excessive nitrite is an important driver of N2O production by n-DAMO bacteria. Higher initial nitrite concentrations lead to increased quantities of N2O being formed. Metatranscriptomic analyses reveal that nitrite reductase (nirS) and nitric oxide reductase (norZ) genes from n-DAMO bacteria are responsible for N2O production. Proper monitoring and control of nitrite levels in wastewater treatment plants would be an effective strategy for mitigating N2O emissions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Biodiversity Conservation
Di Liang, G. Philip Robertson
Summary: The long-term contribution of nitrification to nitrous oxide (N2O) emissions as well as the proportion of N2O derived from nitrification in different ecosystems remains uncertain, with actual values likely to be lower than estimated due to low N2O yields in cultured nitrifiers and competing sinks for available NH4+.
GLOBAL CHANGE BIOLOGY
(2021)
Article
Environmental Sciences
Zhen Lei, Lianxu Wang, Jun Wang, Shuming Yang, Zhaoyang Hou, Xiaochang C. Wang, Rong Chen
Summary: This study demonstrates that operating at higher dissolved oxygen concentrations can effectively improve the performance of the partial nitritation reactor, enhancing ammonia oxidation and reducing nitrite accumulation simultaneously.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Bingbing Ma, Xiaojing Zhang, Aihua Gao, Chuang Ma, Yulin Hou, Zirui Zhao, Hao Hu
Summary: The CANON process was utilized for treating composting wastewater, resulting in decreased ammonia levels and increased total nitrogen removal rate. Microorganisms secreted more extracellular polymeric substances to counteract cell damage caused by harmful substances, maintaining system stability.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Agronomy
Yubing Dong, Xintong Xu, Junqian Zhang, Ying Jiao, Bingxue Wang, Chenyuan Wang, Zhengqin Xiong
Summary: This study investigated the emission characteristics and relative contributions of ammonia-oxidizing archaea (AOA) and bacteria (AOB) and other microbial processes to nitrous oxide (N2O) production in greenhouse vegetable fields in the middle and lower reaches of the Yangtze River. The results showed that the ammonia oxidation process is the dominant contributor to N2O production, regardless of soil pH. AOA-driven N2O emission rates were consistently higher than AOB-driven rates, and both were positively correlated with soil pH.
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
Environmental Sciences
Ting Lan, Yuxiao Huang, Xi Song, Ouping Deng, Wei Zhou, Ling Luo, Xiaoyan Tang, Jian Zeng, Guangdeng Chen, Xuesong Gao
Summary: Nitrogen management measures such as urease inhibitors, synthetic nitrification inhibitors, and biochar are commonly used in agriculture to mitigate nitrogen loss and increase fertilizer recovery efficiency. In a study conducted on calcareous soil under rice cropping, it was found that a combination of BNIs and UIs had the most effective results in reducing nitrogen loss and improving FRE by utilizing synergistic effects.
ENVIRONMENTAL POLLUTION
(2022)
Article
Biodiversity Conservation
Manman Chen, Hong Pan, Mingjie Sun, Wei He, Meng Wei, Yanhong Lou, Hui Wang, Quangang Yang, Haojie Feng, Yuping Zhuge
Summary: Organic fertilizer application increased N2O emissions from nitrification, dominated by the Nitrosospira cluster 3 lineage of AOB, while chemical N fertilizer stimulated N2O production from denitrification, dominated by the nirK lineage of Rhizobiales. The study highlights the different effects of organic and chemical fertilizers on N2O microbial emission pathways in agricultural soils.
ECOLOGICAL INDICATORS
(2021)
Article
Environmental Sciences
Ahmed Elsayed, Jaecheul Yu, Taeho Lee, Younggy Kim
Summary: This study proposed a real-time aeration scheme based on nitrite concentration to control the competition between nitrite oxidizing bacteria (XNOB) and Anammox bacteria (XANA) in single-stage Anammox processes. The simulation results showed that maintaining dissolved oxygen (DO) at around 0.10 mg-O2/L was ideal for effective nitrite creation by ammonia oxidizing bacteria (XAOB) while slowing down the growth of XNOB. Nitrite concentration was found to be the rate-limiting parameter for efficient nitrogen removal in single-stage Anammox processes.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Y. Schneider, M. Beier, K. -H. Rosenwinkel
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2014)
Article
Environmental Sciences
Linda Kanders, Therese Areskoug, Yvonne Schneider, Daniel Ling, Marisa Punzi, Maike Beier
ENVIRONMENTAL TECHNOLOGY
(2014)
Article
Engineering, Environmental
Y. Schneider, M. Beier, K. -H. Rosenwinkel
WATER ENVIRONMENT RESEARCH
(2011)
Article
Engineering, Environmental
N. Trautmann, M. Beier, L. -C. Phan, K. -H. Rosenwinkel
WATER SCIENCE AND TECHNOLOGY
(2011)
Article
Engineering, Environmental
Linda Kanders, Maike Beier, Regina Nogueira, Emma Nehrenheim
WATER SCIENCE AND TECHNOLOGY
(2018)
Article
Biotechnology & Applied Microbiology
Yvonne Schneider, Maike Beier, Karl-Heinz Rosenwinkel
MICROBIAL BIOTECHNOLOGY
(2012)
Article
Environmental Sciences
Soeren Hornig, Katrin Bauerfeld, Maike Beier
Summary: Currently, annual loads from long-term series simulations are commonly used to evaluate rainwater management and treatment measures, although the temporal distribution of pollution and quantity has a noticeable impact on treatment performance. A joint research project in Lower Saxony established measurement devices and scenario studies to dynamically simulate output values in relation to rainfall events, catchment characteristics, and dry periods. First measurement results of surface runoff qualities in an urban sub-catchment in Braunschweig, Germany were presented, along with correlation analysis identifying additional explanatory parameters for the first flush effect.
Article
Green & Sustainable Science & Technology
Maike Beier, Jessica Gerstendorfer, Katja Mendzigall, Dirk Pavlik, Peter Trute, Robert von Tils
Summary: This paper examines the effects of blue-green infrastructure elements on air and surface temperature in courtyards through on-site measurements and simulations. The study finds recognizable effects on temperature and suggests improvements in evaluating the influence of these elements on microclimate.
