Article
Agricultural Engineering
Xianhe Cao, Binhan Zhao, Yongming Wu, Jun Huang, Hongzhi Wang, Xianyun Sun, Shaojie Li
Summary: A novel strain AS1 of Alcaligenes aquatilis with heterotrophic nitrifying-aerobic denitrifying capacity was isolated. AS1 exhibited efficient ammonia removal under various environmental conditions and showed potential in treating actual piggery wastewater.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Yi-Ju Wu, Yi-Wen Liu, Hai-Hsuan Cheng, Chih-Wen Ke, Tsair-Fuh Lin, Liang-Ming Whang
Summary: The study demonstrated that the BioNET system can effectively remove ammonia from slightly polluted river water at low hydraulic retention times. Aeration significantly affects the nitrification process of BioNET, leading to a significant increase in specific ammonia oxidization rate. Real-time quantitative PCR analysis revealed that AOB and Nitrospira are dominant in the bioreactor.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Environmental
Xiangchen Li, Yongzhen Peng, Jingwen Zhang, Rui Du
Summary: Anaerobic ammonium oxidation (anammox) is a widely accepted energy-efficient method for nitrogen removal from high-strength sidestreams. This study demonstrated highly efficient and synchronous nitrogen removal by coupling anammox with a double-nitrite-shunt process, achieving TN removal efficiency of up to 98.4% even at low temperatures. The integration of partial denitrification with anammox offered an efficient solution to address the challenge of excessive NO3--N residue, showcasing significant savings in energy and organic carbon compared to conventional methods.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Xiaoge Wang, Binchuan Li, Jianshe Chen, Shuang Cui, Kuiren Liu, Xiaocai He, Qing Han
Summary: This study develops an efficient technique to purify highly concentrated cyanide-containing industrial wastewater by recovering valuable components. Different precipitating agents were used to sequentially recover zinc, copper, and iron. Cyanide was transformed into thiocyanate and then extracted by solvent extraction. The results showed simultaneous recovery of valuable metallic ions and cyanide conversion.
MINERALS ENGINEERING
(2022)
Article
Engineering, Environmental
Lei Yang, Shen Cui, Yong-Xiang Ren, Lin-Kai Guo, Huan-Huan Liu, Zhi-Hao Zhang, Li-Xin Tu, Jia Wang, Xiao-Tong Li
Summary: Pseudomonas aeruginosa YL isolated from activated sludge showed high-efficiency simultaneous nitrification and denitrification abilities, with strong flocculation and sedimentation performance. Its denitrification pathway was proposed as a sequential heterotrophic nitrification-aerobic denitrification process, indicating good potential for treating ammonium-rich wastewater.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Agricultural Engineering
Yaoqi Hou, Mengqi He, Yongjie Liu, Qian Wang, Aopan Yang, Fei Yang, Zhongfang Lei, Xuesong Yi, Weiwei Huang
Summary: This study investigated the nitrogen removal mechanisms during swine manure anaerobic digestion and the effects of biogas circulation and activated carbon addition. The methane yield was increased by 25.9%, 22.3%, and 44.1% with biogas circulation, activated carbon addition, and their combination, respectively. Nitrification-denitrification was found to be the dominant ammonia removal pathway in all digesters, while anammox did not occur. Biogas circulation promoted mass transfer and enriched nitrification and denitrification bacteria and functional genes, while activated carbon facilitated ammonia removal as an electron shuttle. The combined strategies significantly reduced total ammonia nitrogen by 23.6%.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Qin Cao, Xiangzhen Li, Yichao Chen, Xin Li, Zhijie Xie, Dong Li
Summary: The sudden change in ammonia loading in high-strength ammonium wastewater treatment can directly impact microbial community dynamics, affecting system stability. Understanding the effects of ammonia shock loading on microbial community dynamics is crucial for maintaining system stability.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Saurabh Mishra, Virender Singh, Liu Cheng, Abid Hussain, Banu Ormeci
Summary: The present study provides a comprehensive review of biological nitrogen removal (BNR) technologies, including both conventional and emerging methods. The study covers mechanisms, operational parameters, efficacies, and process control strategies, as well as recent developments, challenges, and ongoing research trends. Additionally, the economic aspects of BNR processes are evaluated to assess their feasibility in wastewater treatment plants of different capacities.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Review
Environmental Sciences
Prangya Ranjan Rout, Muhammad Kashif Shahid, Rajesh Roshan Dash, Puspendu Bhunia, Dezhao Liu, Sunita Varjani, Tian C. Zhang, Rao Y. Surampalli
Summary: The article emphasizes the importance of nutrient removal and recovery, discussing the advantages and limitations of various conventional and advanced treatment technologies, proposing an integrated approach for simultaneous removal and recovery of nutrients, and highlighting bottlenecks and potential solutions in the implementation of nutrient removal technologies.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Amit Mondal, Supriya Sarkar, Udayabhanu G. Nair
Summary: The study compared the characteristics of coke plant and blast furnace wastewater, finding that the water matrices of the two sources are totally different and the concentration of free cyanide is more affected in coke plant wastewater.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Soil Science
Pengpeng Duan, Xinyi Yang, Xunyang He, Yonglei Jiang, Kongcao Xiao, Kelin Wang, Dejun Li
Summary: This study investigated the pathways of N2O production in soils collected from different topographic positions in a subtropical forest. The results showed that autotrophic nitrification pathways were the major source of N2O production, while denitrification pathways were minor sources. Chronic N addition stimulated ammonia oxidation-derived N2O in both the valley and slope, but had different effects on other pathways. Overall, this study provides insights into the regulation of N2O production and its pathways in a subtropical forest.
BIOLOGY AND FERTILITY OF SOILS
(2022)
Article
Agronomy
Yang Yue, Xiangwei Gong, Yongzhao Zheng, Ping Tian, Ying Jiang, Hongyu Zhang, Hua Qi
Summary: Using organic fertilizer combined with maize straw can effectively improve soil quality and enhance the abundance of nitrifying and denitrifying microorganisms in the soil. The application of the organic fertilizer and straw returning practice is essential for optimizing the nutrient balance of farmland ecosystems in Northeast China.
Review
Chemistry, Multidisciplinary
Ncumisa Mpongwana, Sudesh Rathilal
Summary: This review explores the properties of biofilms that can be exploited to enhance biological wastewater systems. It reveals that various biofilm properties, such as extracellular polymeric substances (EPS), quorum sensing (Qs), and acylated homoserine lactones (AHLs), can be enhanced to improve biofilm technology for wastewater treatment processes. The review also emphasizes the importance of exploiting these properties in simultaneous nitrification and denitrification and biological phosphorus removal processes.
APPLIED SCIENCES-BASEL
(2022)
Article
Environmental Sciences
Hao-Tian Wang, Xue-Ling Li, Xin-Shi Wu, Jun Wan, Chun-Xue Zhang, Bo Sun, Hua-Zhang Zhao
Summary: A novel photochemical strategy utilizing solar irradiation was designed to remove inorganic ammonia nitrogen from wastewater. The photo-Fe (or Mn)eO(2) system was built to effectively remove ammonia-nitrogen from its aqueous solution. This cost-efficient and environmentally-friendly strategy does not produce NOx, providing a new possibility for wastewater treatment.
Review
Environmental Sciences
Nian Liu, Zhen Sun, Huan Zhang, Lasse Hyldgaard Klausen, Ryu Moonhee, Shifei Kang
Summary: Bacterial and photocatalysis techniques are widely used for the remediation of ammonia nitrogen wastewater. While traditional microbial methods are proven useful, there is a need for more efficient and controllable treatment methods to address the diverse cases of ammonia nitrogen pollution. Bacterial treatment relies on ammonia nitrogen oxidation-reduction by nitrifying and denitrifying bacteria, but these reactions are slow and uncontrolled. Photocatalysis, on the other hand, has advantages such as low temperature reaction and long life, but cannot perform multiple complex biochemical reactions. This review highlights recent achievements, key problems, and future directions for remediation of high-ammonia-nitrogen wastewater using bacterial treatment and photocatalysis techniques, including the potential of combining bacterial-photocatalysis techniques.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Laura Megido, Luis Negral, Leonor Castrillon, Beatriz Suarez-Pena, Yolanda Fernandez-Nava, Elena Maranon
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2017)
Article
Environmental Sciences
Ivan Machon-Gonzalez, Jesus Rodriguez-Iglesias, Hilario Lopez-Garcia, Leonor Castrillon-Pelaez, Elena Maranon-Maison
ENVIRONMENTAL TECHNOLOGY
(2017)
Article
Environmental Sciences
Pedro Ormaechea, Leonor Castrillon, Elena Maranon, Yolanda Fernandez-Nava, Luis Negral, Laura Megido
ENVIRONMENTAL TECHNOLOGY
(2017)
Article
Environmental Sciences
L. Megido, L. Negral, L. Castrillon, Y. Fernandez-Nava, B. Suarez-Pena, E. Maranon
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2017)
Article
Environmental Sciences
L. Negral, L. Castrillon, E. Maranon, Y. Fernandez-Nava, P. Ormaechea
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2017)
Article
Green & Sustainable Science & Technology
P. Ormaechea, L. Castrillon, B. Suarez-Pena, L. Megido, Y. Fernandez-Nava, L. Negral, E. Maranon, J. Rodriguez-Iglesias
Article
Environmental Sciences
Luis Negral, Beatriz Suarez-Pena, Eugenia Zapico, Yolanda Fernandez-Nava, Laura Megido, Jose Moreno, Elena Maranon, Leonor Castrillon
Article
Environmental Sciences
E. Maranon, L. Negral, B. Suarez-Pena, Y. Fernandez-Nava, P. Ormaechea, P. Diaz-Caneja, L. Castrillon
Summary: This study investigated the methane potential of supermarket food waste under thermophilic conditions, finding that a mixture of waste from all supermarket sections produced the highest methane yield. However, excluding fruit and vegetable waste also produced similar results.
WASTE AND BIOMASS VALORIZATION
(2021)
Article
Environmental Sciences
Jesus Rodriguez-Iglesias, Lara Alcala, Laura Megido, Leonor Castrillon
Summary: In this study, ion exchange technology was used to reduce the fluoride content in effluent from a coke wastewater treatment plant, with Al-doped TP260 resin showing better removal efficiency compared to Al-doped TP207 resin. Kinetic and isotherm studies confirmed the optimal conditions for the ion exchange process, indicating higher sorption capacity for the Al-doped TP260 resin.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Rosa Lara, Laura Megido, Beatriz Suarez-Pena, Luis Negral, Yolanda Fernandez-Nava, Jesus Rodriguez-Iglesias, Elena Maranon, Leonor Castrillon
Summary: Lockdown restrictions imposed during the COVID-19 pandemic have resulted in changes in atmospheric pollution levels. This study analyzed the hourly levels of PM10, PM2.5, and black carbon in a Spanish industrial suburban area from May 2019 to June 2020. The highest pollutant concentrations were observed when the wind came from the southwest and during nighttime. The decrease/increase in pollutant levels during the lockdown varied depending on the time period considered.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Engineering, Environmental
Rosa Lara, Beatriz Suarez-Pena, Laura Megido, Luis Negral, Jesus Rodriguez-Iglesias, Yolanda Fernandez-Nava, Leonor Castrillon
Summary: This study investigated the human health risk of metals/metalloids in the dry deposition fraction of settleable particulate matter in two sites in a coastal city in northern Spain. The main exposure pathway for residents was ingestion, and while levels were acceptable for adults, children showed higher levels of hazard indexes and carcinogenic risks for some elements. More research is needed to fully understand the impact of metals/metalloids in DSPM on human health.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Meeting Abstract
Cardiac & Cardiovascular Systems
L. Diaz-Chiron, L. Negral, A. Suarez, I. Pascual, B. Suarez-Pena, Y. Fernandez-Nava, R. Diaz, D. Hernandez-Vaquero, S. Rodriguez, P. Abreu-Gonzalez, A. Dominguez-Rodriguez, L. Castrillon, C. Moris, P. Avanzas Fernandez
EUROPEAN HEART JOURNAL
(2018)
Article
Environmental Sciences
Laura Megido, Beatriz Suarez-Pena, Luis Negral, Leonor Castrillon, Yolanda Fernandez-Nava