Review
Environmental Sciences
Fang Zheng, Jie Wang, Rui Xiao, Wenbo Chai, Defeng Xing, Huijie Lu
Summary: This article systematically reviewed the characteristics, transformation and ecological impacts of wastewater dissolved organic nitrogen (DON), highlighting the dominant role of biological treatment processes in DON transformation. However, critical knowledge gaps and issues that need to be addressed still exist.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Zhou Liang, Robert T. Letscher, Angela N. Knapp
Summary: Surface ocean bulk and semi-labile dissolved organic matter (DOM) stoichiometry vary across ocean regions with global means of 387:26:1 and 179:20:1, respectively. Surface ocean DOC:DOP and DON:DOP concentration ratios are more variable than DOC:DON concentration ratios. Surface ocean gradients in P-depleted DOM stoichiometries in the Pacific and Atlantic basins reflect variable nutrient stress.
GLOBAL BIOGEOCHEMICAL CYCLES
(2023)
Article
Environmental Sciences
Adam S. Wymore, Penny J. Johnes, Susana Bernal, E. N. Jack Brookshire, Hannah M. Fazekas, Ashley M. Helton, Alba Argerich, Rebecca T. Barnes, Ashley A. Coble, Walter K. Dodds, Shahan Haq, Sherri L. Johnson, Jeremy B. Jones, Sujay S. Kaushal, Pirkko Kortelainen, Carla Lopez-Lloreda, Bianca M. Rodriguez-Cardona, Robert G. M. Spencer, Pamela L. Sullivan, Christopher A. Yates, William H. McDowell
Summary: A comprehensive assessment of nitrogen species in stream water reveals shifts in dissolved nitrogen pool composition from highly heterogeneous to primarily inorganic nitrogen under nutrient enrichment from human disturbances. With increasing total dissolved nitrogen concentrations, inorganic nitrogen dominates the pool while dissolved organic nitrogen decreases. These changes in stoichiometry may have significant implications for global biogeochemical cycles of carbon and nitrogen in freshwater ecosystems.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Engineering, Environmental
Hong Chen, Kai Wang, Shuaiqi She, Xin Yu, Luying Yu, Gang Xue, Xiang Li
Summary: The textile industry discharges printing and dyeing wastewater containing high levels of refractory dissolved organic nitrogen (DON), but little attention has been focused on its transformation and characteristics during treatment, as well as its potential environmental impact.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Zhenwei Yan, Na Yang, Zhou Liang, Maojun Yan, Xiaosong Zhong, Yu Zhang, Wenqi Xu, Yu Xin
Summary: Large rivers like the Yellow River play a crucial role in the cycling of dissolved organic nitrogen (DON), with DON<1kDa dominating the DON pool and correlating inversely with dissolved inorganic nitrogen (DIN). Geographical features and microbial communities are closely related in driving DON cycling, highlighting the importance of DON mineralization in carbon cycling in marginal seas.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Jie Wang, Fang Zheng, Zhaoniao Yu, Jinrong Chen, Huijie Lu
Summary: Denitrifiers were identified as major contributors to mDON synthesis, and the molecular composition, influential factors, and synthetic microorganisms of denitrification-derived mDON compounds leading to N-DBP formation were further revealed, elucidating the composition of mDON and its impact on N-DBP.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Agricultural Engineering
Fidelis Odedishemi Ajibade, Hong-Cheng Wang, Awoke Guadie, Temitope Fausat Ajibade, Ying-Ke Fang, Hafiz Muhammad Adeel Sharif, Wen-Zong Liu, Ai-Jie Wang
Summary: Biochar was used to enhance the removal of organic and nitrogen from secondary wastewater in constructed wetlands. Adding 1% biochar and microbes significantly increased the removal efficiencies of COD and nitrogen, while the release of dissolved organic carbon from biochar promoted nitrogen removal. RNA gene sequencing analysis showed enhanced growth of bacteria in biochar-amended systems.
BIORESOURCE TECHNOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Hewen Niu, Shichang Kang, Chandan Sarangi, Guotao Zhang, Mengxue Chen, Yuzhong Zhang, Huili Qin
Summary: This study systematically determines the organic and inorganic constituents in water bodies of the cryosphere region in the eastern Tibetan Plateau and finds that high-elevation water bodies have lower organic carbon content. Additionally, it suggests that atmospheric deposition and anthropogenic activities contribute to the observed patterns in organic carbon and nitrogen content.
Article
Environmental Sciences
Peidong Xu, Lei Shi, Xin Yang, Haoming Yang, Kuanhu Dong, Changhui Wang
Summary: Soil dissolved organic matter (DOM) plays a critical role in regulating the cycling of terrestrial biogeochemistry. N addition significantly increased soil DOM concentration, with a greater impact on dissolved organic nitrogen (DON) than dissolved organic carbon (DOC). The level of N addition was positively correlated with soil DOC and DON concentrations, and the influence of N addition on soil DOC concentration decreased with higher initial soil total nitrogen (TN). Mean annual precipitation (MAP) facilitated the leaching out of soil DON and had a negative impact on its concentration under N addition. Increased soil depth and initial soil pH affected the soil DOC and DON concentrations, with DOC accumulating in the top soil and DON leaching to deeper soil. This study provides a mechanistic understanding of the influence of N addition on terrestrial ecosystem C and N dynamics at the regional scale.
LAND DEGRADATION & DEVELOPMENT
(2023)
Article
Environmental Sciences
Mengyue Wu, Yini Ma, Huixiang Xie, Rong Ji
Summary: Photodissolution has the potential to efficiently remove microplastics from the surface ocean, and temperature and incident sunlight composition play critical roles in this process.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Xiuli Yan, Jin-Yu Terence Yang, Min Nina Xu, Hongjie Wang, Minhan Dai, Shuh-Ji Kao
Summary: Information on the sources and transformations of particulate organic N (PN) and dissolved organic N (DON) at the coastal interface remains insufficient due to technological difficulties and complicated features of intensive physical mixing and rapid biological activities. The study investigated the spatial distribution of concentrations and isotopic compositions of PN and DON in the Changjiang plume during the summer flood period, revealing nonconservative DON behaviors and active transformations between the DON and PN pools.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Jincheng Lu, Qiongfang Zhuo, Xiuwen Ren, Yongfu Qiu, Yanliang Li, Zhongying Chen, Kaifeng Huang
Summary: In this study, electrocoagulation and electrochemical technology were used to treat adhesive wastewater containing high COD and ammonia nitrogen. The results showed that the combination of electrocoagulation and electrochemical oxidation methods effectively removed COD and ammonia nitrogen, demonstrating its potential for treating adhesive wastewater.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Environmental Sciences
Kewei Liao, Haidong Hu, Jinfeng Wang, Bing Wu, Hongqiang Ren
Summary: The study provides a method to decipher esDON information in wastewater treatment processes and discovers the important role of esDON in DON transformation and characteristics, highlighting the significance of controlling esDON to mitigate the adverse impacts of DON on receiving waters.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Civil
Ewen Silvester, Terry Karis, Anne Yusuf, John Pengelly, Samantha Grover, Gavin N. Rees
Summary: The study found that storm events mobilized dissolved organic carbon and nitrogen, with proteins playing a key role and exhibiting different dynamics at different stages of the storm. This suggests that there is spatial and temporal separation of molecular groups within the pools of dissolved organic carbon and nitrogen, leading to changing composition of DOC through a storm cycle.
JOURNAL OF HYDROLOGY
(2021)
Article
Geosciences, Multidisciplinary
Na Li, Ruiying Chang, Hui Jiang, Akash Tariq, Jordi Sardans, Josep Penuelas, Feng Sun, Xingmei Zhou
Summary: The experiment on grazing-exclusion and climate warming effects in alpine meadows revealed that grazing-exclusion significantly decreased potential nitrogen mineralization, and climate warming could amplify the adverse effects of grazing-exclusion. Light-intensity grazing was beneficial for increasing soil enzyme activity and nitrogen mineralization in alpine meadows, providing important guidance for sustainable grazing management in the face of climate change.
Article
Energy & Fuels
Anna Remiszewska-Skwarek, Ryszard Wierzchnicki, Otton K. Roubinek, Archana Kasinath, Alicja Jezewska, Magdalena Jasinska, Hubert Bylinski, Andrzej G. Chmielewski, Krzysztof Czerwionka
Summary: This study demonstrates the economic and operational benefits of using low-temperature disintegration technology in increasing energy production from renewable sources. Experimental results show significant improvements in biogas and methane production, with the Gompertz model proving to be an effective tool for describing methane accumulation during co-fermentation processes.
Article
Green & Sustainable Science & Technology
Mojtaba Maktabifard, Kati Blomberg, Ewa Zaborowska, Anna Mikola, Jacek Makinia
Summary: Activated sludge models with N2O emission module are powerful tools for analyzing the operation of wastewater treatment plants. This study extrapolated a validated model from one plant to another, and compared it with another model with an N2O module. The validated model accurately predicted the behavior of the system in terms of liquid and gaseous N2O production, and identified the key role of heterotrophs in N2O production. The findings highlight the importance of model applications in carbon footprint studies.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Mojtaba Maktabifard, Alexis Awaitey, Elina Merta, Henri Haimi, Ewa Zaborowska, Anna Mikola, Jacek Makinia
Summary: This study proposed a functional unit (FU) for a comprehensive comparison of wastewater treatment plants (WWTPs) in terms of their carbon footprint (CF). Direct emissions had the highest contribution to total CF, while energy consumption dominated the total indirect emissions in both countries. Polish WWTPs benefitted more from energy self-sufficiency than Finnish plants due to higher electricity emission factors in Poland.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Mohamad-Javad Mehrani, Faramarz Bagherzadeh, Min Zheng, Przemyslaw Kowal, Dominika Sobotka, Jacek Makinia
Summary: A new method combining a mechanistic model and machine learning algorithms was developed to predict liquid N2O production during nitrification. The mechanistic model was used to simulate experimental trials, and the machine learning algorithms were used for prediction. Feature selection techniques were employed to identify the most relevant parameters for liquid N2O predictions. The proposed method enables fast and accurate prediction of liquid N2O concentrations with limited availability of measured data.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Energy & Fuels
Eliza Kulbat, Krzysztof Czerwionka
Summary: The aim of this research was to assess the impact of phosphorus speciation on the precipitation of phosphorus in reject water using Ca(OH)(2). The study analyzed the phosphorus speciation in reject water from four wastewater treatment plants with different feedstock compositions. The results showed that using Ca(OH)(2) achieved very high phosphate phosphorus removal efficiencies (>99.9%) in all analyzed wastewater, regardless of the forms of phosphorus present.
Article
Environmental Sciences
Yingying He, Hongyu Mao, Jacek Makinia, Jakub Drewnowski, Bing Wu, Jun Xu, Li Xie, Xi Lu
Summary: This study investigated the effects of soluble readily biodegradable COD (sCOD) and particulate slowly biodegradable COD (pCOD) on the anammox process. The results showed that a low sCOD/N ratio could accelerate the anammox and denitrification activity, with partial denitrification-anammox and denitrification being the major pathways for nitrogen removal. High sCOD/N ratio was beneficial for alleviating N2O accumulation.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Review
Environmental Sciences
Bogna Sniatala, Tonni Agustiono Kurniawan, Dominika Sobotka, Jacek Makinia, Dzarfan Othman
Summary: This article reviews the technical applicability of various water technologies for recovering macro-nutrients from wastewater, focusing on phosphorus (P), nitrogen (N), and potassium (K). The strengths and drawbacks of technologies such as struvite precipitation, adsorption, ion exchange, and membrane filtration are evaluated and compared. The study also explores the use of artificial intelligence (AI) in optimizing treatment processes and scaling up water treatment plants to facilitate the reuse of recovered materials for ensuring food security.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Energy & Fuels
Otton K. K. Roubinek, Anna Wilinska-Lisowska, Magdalena Jasinska, Andrzej G. G. Chmielewski, Krzysztof Czerwionka
Summary: This paper discusses the possibility of obtaining alternative energy from methane fermentation catalyzed by biomass. The distillation residue from the distillery industry was used as the main substrate in the case of mono-fermentation and co-fermentation with sewage sludge. The results showed higher biogas and methane production in mono-fermentation process, with methane accounting for around 63% and 50% in both types of the process, respectively. The application of the Gompertz model allowed for the estimation of important parameters and the analysis of potential biogas production based on the mass of distillation residue produced annually in Poland.
Article
Environmental Sciences
Mohamad-Javad Mehrani, Przemyslaw Kowal, Dominika Sobotka, Martyna Godzieba, Slawomir Ciesielski, Jianhua Guo, Jacek Makinia
Summary: This study developed an activated sludge model to account for competition between nitrite oxidizing bacteria and comammox bacteria. Experimental data was used for model calibration and validation, and the newly developed model accurately predicted the relative abundance of comammox bacteria and nitrifiers to heterotrophs ratio. The study contributes to a better understanding of autotrophic nitrogen removal processes with nitrite as an intermediate product.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Review
Environmental Sciences
Hussein E. Al-Hazmi, Xi Lu, Dominika Grubba, Joanna Majtacz, Michael Badawi, Jacek Makinia
Summary: This review highlights the importance of understanding microbial metabolism in anammox-mediated systems and their potential applications in sustainable nitrogen removal from wastewater. Various processes, including PN-A, SNAD, PD-A, and DAMO-A, have shown efficient N removal in different wastewater treatment scenarios. The review also discusses the production of N2O in anammox-based processes and how it relates to certain bacteria. Additionally, mathematical models and promising NO3- reduction technologies are discussed. Overall, this review provides valuable insights into sustainable N removal in anammox-mediated systems, encouraging further research in this field.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Energy & Fuels
A. Wilinska-Lisowska, O. Roubinek, R. Chmielwski, K. Czerwionka
Summary: The aim of this study was to investigate the changes in the organic nitrogen fraction in the liquid fraction of digestate during mono- and co-digestion laboratory tests. Three agricultural wastes were tested: distillery residue, cattle slurry, and corn silage. In the mono-fermentation tests, the initial total nitrogen concentration varied depending on the feedstock used. Hydrolysis and ammonification of the organic matter in the feedstocks led to an increase in ammonium nitrogen concentration after 28 days of fermentation. Different organic nitrogen fractions were found to predominate in each feedstock. Co-digestion tests with 20% and 80% inoculum content and the same feedstock combination as the mono-fermentation were conducted. Evaluation of nitrogen transformation required calculating concentrations from the mass balance, considering the changes occurring in the inoculum itself. Increases in ammonium nitrogen concentrations were greater in the test with 80% inoculum compared to the test with 20%. Co-digestion for 28 days resulted in increased removal efficiency for dissolved organic nitrogen (DON), as well as increases in colloidal (CON) and particulate organic nitrogen (PON) fractions. The trend of change was similar for both 20% and 80% inoculum tests.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Agricultural Engineering
Dominika Derwis, Joanna Majtacz, Przemys law Kowal, Hussein E. Al-Hazmi, Jun Zhai, Slawomir Ciesielski, Grzegorz Piechota, Jacek Makinia
Summary: The Anammox and sulfate reduction ammonium oxidation processes were compared in two granular sequencing batch reactors operated for 160 days under anammox conditions. The study found that increasing the concentration of sulfate (SO42-) could positively influence the rate of nitrogen (N) removal under anaerobic conditions. It was also discovered that sulfate reduction and anammox occur independently. By increasing the influent sulfate concentration, a higher ammonium utilization rate and sulfate utilization rate were achieved, leading to more efficient treatment of NH4+ and SO42--rich wastewater.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Wenbo Liu, Sai Xu, Hongpu Ma, Yuanyuan Li, Jacek Makinia, Jun Zhai
Summary: Manganese-dependent anaerobic oxidation of methane (Mn-AOM) is a crucial process for methane consumption and mitigating global warming. However, the electron transfer between CH4 and insoluble Mn(IV) minerals is challenging, leading to a lack of understanding of the microorganisms involved in MnAOM. This study successfully enriched an anaerobic consortium that mediated Mn-AOM and revealed a novel pathway for this process. Through bioreactor experiments and 13C-labelling batch experiments, the occurrence of Mn-AOM was confirmed. Metagenomic and metatranscriptomic analyses identified Candidatus Methanoperedens sp. BLZ1 as responsible for CH4 oxidation. Luteitalea pratensis mediated extracellular electron transfer and microbial Mn(IV) reduction in the consortium. This study provides new insights into global climate change and manganese cycles.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Environmental Sciences
Hussein E. Al-Hazmi, Ali Mohammadi, Aleksander Hejna, Joanna Majtacz, Amin Esmaeili, Sajjad Habibzadeh, Mohammad Reza Saeb, Michael Badawi, Eder C. Lima, Jacek Makinia
Summary: Considering water scarcity and increased water consumption, sustainable water recycling and wastewater reuse are urgent. A comprehensive literature review reveals that poor treatment of wastewater leads to increased pathogen and microbial threats, plant and soil contamination, as well as potential long-term health risks from emerging pollutants. Standardized analytical techniques should be developed to assess the effects of hazardous chemicals and heavy metals on human health.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Environmental
Tayebeh Goli, Kamrun Ahmadi, Krishna R. Pagilla, Eric A. Marchand
Summary: This study investigated the removal of dissolved organic nitrogen (DON) in reclaimed water through enhanced coagulation, ozonation, and ozonation/biodegradation at both lab and pilot scales. The results showed that DON could be effectively removed by enhanced coagulation, ozonation, and ozonation/biodegradation, with the best results achieved by the combination of ozonation and biodegradation.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
