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Li Y, Zhang M, Liu X, Zhang L, Chen F. Trophic homogeneity due to seasonal variation in nitrogen in shallow subtropical lakes. WATER RESEARCH 2024; 266:122321. [PMID: 39217645 DOI: 10.1016/j.watres.2024.122321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2024] [Revised: 07/22/2024] [Accepted: 08/23/2024] [Indexed: 09/04/2024]
Abstract
Lakes play a crucial role in the nitrogen (N) cycle, and eutrophication disrupts the balance of the nitrogen cycle within lakes, including both the N removal process and the N supplement process. However, the mechanisms by which different nutrient levels affect seasonal nitrogen variations in the water columns are not clear, especially for long-term and large- scale studies. In this study, we used 206 independent spatial samples from a total of 108 subtropical shallow lakes from four surveys in the middle and lower reaches of the Yangtze River, as well as time-case study data from Lake Taihu and Lake Donghu of up to 23 and 14 years, respectively, to analyze the changes in summer TN compared to spring (delta TN). Delta TN was significantly negatively correlated with initial spring TN concentrations, with similar trends observed in both space and time. Furthermore, the slopes of spring TN vs. delta TN varied little across lakes in both time and space, suggesting a consistent relationship between initial spring TN and summer TN changes. When initial TN or TN: TP ratio was low, N fixation by algae played a significant role in compensating for summer N removal, thus mitigating summer N reductions; when TN was high or TN: TP ratio was high, ammonia stress reduced the compensatory effect of algae and denitrification played a significant role in summer N removal, thus increasing summer N reductions. Our study suggested that no matter what the initial conditions are, lakes tend to evolve towards a common nutrient status through biological regulation.
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Affiliation(s)
- Yun Li
- Key Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Min Zhang
- Key Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Xia Liu
- Key Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Lu Zhang
- Key Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Feizhou Chen
- Key Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
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2
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Shu W, Zhang Q, Audet J, Li Z, Leng P, Qiao Y, Tian C, Chen G, Zhao J, Cheng H, Li F. Non-negligible N 2O emission hotspots: Rivers impacted by ion-adsorption rare earth mining. WATER RESEARCH 2024; 251:121124. [PMID: 38237464 DOI: 10.1016/j.watres.2024.121124] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 12/06/2023] [Accepted: 01/08/2024] [Indexed: 02/12/2024]
Abstract
Rare earth mining causes severe riverine nitrogen pollution, but its effect on nitrous oxide (N2O) emissions and the associated nitrogen transformation processes remain unclear. Here, we characterized N2O fluxes from China's largest ion-adsorption rare earth mining watershed and elucidated the mechanisms that drove N2O production and consumption using advanced isotope mapping and molecular biology techniques. Compared to the undisturbed river, the mining-affected river exhibited higher N2O fluxes (7.96 ± 10.18 mmol m-2d-1 vs. 2.88 ± 8.27 mmol m-2d-1, P = 0.002), confirming that mining-affected rivers are N2O emission hotspots. Flux variations scaled with high nitrogen supply (resulting from mining activities), and were mainly attributed to changes in water chemistry (i.e., pH, and metal concentrations), sediment property (i.e., particle size), and hydrogeomorphic factors (e.g., river order and slope). Coupled nitrification-denitrification and N2O reduction were the dominant processes controlling the N2O dynamics. Of these, the contribution of incomplete denitrification to N2O production was greater than that of nitrification, especially in the heavily mining-affected reaches. Co-occurrence network analysis identified Thiomonas and Rhodanobacter as the key genus closely associated with N2O production, suggesting their potential roles for denitrification. This is the first study to elucidate N2O emission and influential mechanisms in mining-affected rivers using combined isotopic and molecular techniques. The discovery of this study enhances our understanding of the distinctive processes driving N2O production and consumption in highly anthropogenically disturbed aquatic systems, and also provides the foundation for accurate assessment of N2O emissions from mining-affected rivers on regional and global scales.
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Affiliation(s)
- Wang Shu
- Shandong Yucheng Agro-Ecosystem National Observation and Research Station, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; Sino-Danish College of University of Chinese Academy of Sciences, Beijing 101408, China; Sino-Danish Centre for Education and Research, Beijing 101408, China
| | - Qiuying Zhang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
| | - Joachim Audet
- Department of Ecoscience, Aarhus University, C.F. Møllers Allé, Aarhus 8000, Denmark
| | - Zhao Li
- Shandong Yucheng Agro-Ecosystem National Observation and Research Station, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Peifang Leng
- Shandong Yucheng Agro-Ecosystem National Observation and Research Station, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Yunfeng Qiao
- Shandong Yucheng Agro-Ecosystem National Observation and Research Station, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Chao Tian
- Shandong Yucheng Agro-Ecosystem National Observation and Research Station, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Gang Chen
- Department of Civil and Environmental Engineering, Florida A&M University (FAMU)-Florida State University (FSU) Joint College of Engineering, 32310, United States
| | - Jun Zhao
- School of Geography and Ocean Science, Nanjing University, Nanjing 210023, China
| | - Hefa Cheng
- MOE Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Fadong Li
- Shandong Yucheng Agro-Ecosystem National Observation and Research Station, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; Sino-Danish College of University of Chinese Academy of Sciences, Beijing 101408, China.
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3
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Qi Y, Zhong Y, Luo L, He J, Feng B, Wei Q, Zhang K, Ren H. Subsurface constructed wetlands with modified biochar added for advanced treatment of tailwater: Performance and microbial communities. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167533. [PMID: 37793458 DOI: 10.1016/j.scitotenv.2023.167533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 09/26/2023] [Accepted: 09/30/2023] [Indexed: 10/06/2023]
Abstract
The limitations of conventional substrates in treating wastewater treatment plant tailwater are evident in subsurface flow constructed wetlands, and the emergence of biochar presents a solution to this problem. The objective of this study was to assess and prioritize the efficacy of various modified reed biochar in removing pollutants when used as fillers in wetland systems. To achieve this, we established multiple simulation systems of vertical groundwater flow wetlands, each filled with different modified reed biochar. The reed biochar was prepared and modified using Pingluo reed poles from Ningxia. We monitored the quality of the effluent water and the diversity of the microbial community in order to evaluate the pollutant removal performance of the modified biochar under different hydraulic retention times in a laboratory setting. The findings indicated that a hydraulic retention time of 24-48 h was found to be optimal for each wetland system. Furthermore, the composite modified biochar system with KMnO4 and ZnCl2 exhibited higher levels of dissolved oxygen and lower conductivity, resulting in superior pollutant removal performance. Specifically, the system achieved removal rates of 89.94 % for COD, 85.88 % for TP, 91.05 % for TN, and 92.76 % for NH3-N. Additionally, the 16S rRNA high-throughput sequencing analysis revealed that the system displayed high Chao1, Shannon, and Simpson indices of 6548.75, 10.1965, and 0.9944, respectively. The predominant bacterial phyla observed in the wetland system were Proteobacteria, Bacteroidetes, Chloroflexi, Patescibacteria, Firmicutes, and Actinobacteria. Additionally, the denitrifying bacterial class, Rhodobacteriaceae, was found to have the highest content ratio in this system. This finding serves as confirmation that the KMnO4 and ZnCl2 composite modified biochar can significantly enhance water purification performance. Consequently, this study offers valuable insights for wastewater treatment plants seeking to implement vertical submersible artificial wetland tailwater improvement projects.
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Affiliation(s)
- Yarong Qi
- School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, People's Republic of China
| | - Yanxia Zhong
- School of Ecology and Environment, Ningxia University, Yinchuan 750021, People's Republic of China; Ningxia University Northwest State Key Laboratory of Land Degradation and Ecological Restoration Cultivation Base, Yinchuan 750021, People's Republic of China.
| | - Lingling Luo
- School of Ecology and Environment, Ningxia University, Yinchuan 750021, People's Republic of China; Ningxia University Northwest State Key Laboratory of Land Degradation and Ecological Restoration Cultivation Base, Yinchuan 750021, People's Republic of China
| | - Jing He
- School of Ecology and Environment, Ningxia University, Yinchuan 750021, People's Republic of China; Ningxia University Northwest State Key Laboratory of Land Degradation and Ecological Restoration Cultivation Base, Yinchuan 750021, People's Republic of China
| | - Bo Feng
- School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, People's Republic of China
| | - Qiqi Wei
- School of the Environment & Ecology XiaMen University, XiaMen 361005, People's Republic of China
| | - Koukou Zhang
- School of Geography and Planning, Ningxia University, Yinchuan 750021, People's Republic of China
| | - Huiqin Ren
- School of Geography and Planning, Ningxia University, Yinchuan 750021, People's Republic of China
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Yang P, Tang KW, Zhang L, Lin X, Yang H, Tong C, Hong Y, Tan L, Lai DYF, Tian Y, Zhu W, Ruan M, Lin Y. Effects of landscape modification on coastal sediment nitrogen availability, microbial functional gene abundances and N 2O production potential across the tropical-subtropical gradient. ENVIRONMENTAL RESEARCH 2023; 227:115829. [PMID: 37011802 DOI: 10.1016/j.envres.2023.115829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 03/16/2023] [Accepted: 03/31/2023] [Indexed: 05/08/2023]
Abstract
Wetland sediment is an important nitrogen pool and a source of the greenhouse gas nitrous oxide (N2O). Modification of coastal wetland landscape due to plant invasion and aquaculture activities may drastically change this N pool and the related dynamics of N2O. This study measured the sediment properties, N2O production and relevant functional gene abundances in 21 coastal wetlands across five provinces along the tropical-subtropical gradient in China, which all had experienced the same sequence of habitat transformation from native mudflats (MFs) to invasive Spartina alterniflora marshes (SAs) and subsequently to aquaculture ponds (APs). Our results showed that change from MFs to SAs increased the availability of NH4+-N and NO3--N and the abundance of functional genes related to N2O production (amoA, nirK, nosZ Ⅰ, and nosZ Ⅱ), whereas conversion of SAs to APs resulted in the opposite changes. Invasion of MFs by S. alterniflora increased N2O production potential by 127.9%, whereas converting SAs to APs decreased it by 30.4%. Based on structural equation modelling, nitrogen substrate availability and abundance of ammonia oxidizers were the key factors driving the change in sediment N2O production potential in these wetlands. This study revealed the main effect patterns of habitat modification on sediment biogeochemistry and N2O production across a broad geographical and climate gradient. These findings will help large-scale mapping and assessing landscape change effects on sediment properties and greenhouse gas emissions along the coast.
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Affiliation(s)
- Ping Yang
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350117, PR China; Institute of Geography, Fujian Normal University, Fuzhou, 350117, PR China; Fujian Provincial Key Laboratory for Subtropical Resources and Environment, Fujian Normal University, Fuzhou, 350117, PR China; Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350117, PR China.
| | - Kam W Tang
- Department of Biosciences, Swansea University, Swansea, SA2 8PP, UK
| | - Linhai Zhang
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350117, PR China; Institute of Geography, Fujian Normal University, Fuzhou, 350117, PR China
| | - Xiao Lin
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350117, PR China; Institute of Geography, Fujian Normal University, Fuzhou, 350117, PR China; Fujian Provincial Key Laboratory for Subtropical Resources and Environment, Fujian Normal University, Fuzhou, 350117, PR China
| | - Hong Yang
- College of Environmental Science and Engineering, Fujian Normal University, Fuzhou, 350007, China; Department of Geography and Environmental Science, University of Reading, Reading, RG6 6AB, UK
| | - Chuan Tong
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350117, PR China; Institute of Geography, Fujian Normal University, Fuzhou, 350117, PR China; Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350117, PR China.
| | - Yan Hong
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350117, PR China
| | - Lishan Tan
- Department of Geography and Resource Management, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China
| | - Derrick Y F Lai
- Department of Geography and Resource Management, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China.
| | - Yalan Tian
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350117, PR China
| | - Wanyi Zhu
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350117, PR China
| | - Manjing Ruan
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350117, PR China
| | - Yongxin Lin
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350117, PR China; Institute of Geography, Fujian Normal University, Fuzhou, 350117, PR China; Fujian Provincial Key Laboratory for Subtropical Resources and Environment, Fujian Normal University, Fuzhou, 350117, PR China.
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5
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Pensky J, Fisher AT, Gorski G, Schrad N, Bautista V, Saltikov C. Linking nitrate removal, carbon cycling, and mobilization of geogenic trace metals during infiltration for managed recharge. WATER RESEARCH 2023; 239:120045. [PMID: 37201373 DOI: 10.1016/j.watres.2023.120045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 04/14/2023] [Accepted: 05/02/2023] [Indexed: 05/20/2023]
Abstract
We present results from a series of laboratory column studies investigating the impacts of infiltration dynamics and the addition of a soil-carbon amendment (wood mulch or almond shells) on water quality during infiltration for flood-managed aquifer recharge (flood-MAR). Recent studies suggest that nitrate removal could be enhanced during infiltration for MAR through the application of a wood chip permeable reactive barrier (PRB). However, less is understood about how other readily available carbon sources, such as almond shells, could be used as a PRB material, and how carbon amendments could impact other solutes, such as trace metals. Here we show that the presence of a carbon amendment increases nitrate removal relative to native soil, and that there is greater nitrate removal in association with longer fluid retention times (slower infiltration rates). Almond shells promoted more efficient nitrate removal than wood mulch or native soil, but also promoted the mobilization of geogenic trace metals (Mn, Fe, and As) during experiments. Almond shells in a PRB likely enhanced nitrate removal and trace metal cycling by releasing labile carbon, promoting reducing conditions, and providing habitat for microbial communities, the composition of which shifted in response. These results suggest that limiting the amount of bioavailable carbon released by a carbon-rich PRB may be preferred where geogenic trace metals are common in soils. Given the dual threats to groundwater supplies and quality worldwide, incorporating a suitable carbon source into the soil for managed infiltration projects could help to generate co-benefits and avoid undesirable results.
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Affiliation(s)
- Jennifer Pensky
- Department of Earth and Planetary Sciences, University of California Santa Cruz, Santa Cruz, CA 95064, United States.
| | - Andrew T Fisher
- Department of Earth and Planetary Sciences, University of California Santa Cruz, Santa Cruz, CA 95064, United States
| | - Galen Gorski
- Department of Earth and Planetary Sciences, University of California Santa Cruz, Santa Cruz, CA 95064, United States
| | - Nicole Schrad
- Department of Microbiology and Environmental Toxicology, University of California, Santa Cruz, CA 95064, United States
| | - Victor Bautista
- Department of Earth and Planetary Sciences, University of California Santa Cruz, Santa Cruz, CA 95064, United States
| | - Chad Saltikov
- Department of Microbiology and Environmental Toxicology, University of California, Santa Cruz, CA 95064, United States
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6
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Pan Y, Fu YY, Zhou K, Tian T, Li YS, Yu HQ. Microbial mixotrophic denitrification using iron(II) as an assisted electron donor. WATER RESEARCH X 2023; 19:100176. [PMID: 37020531 PMCID: PMC10068250 DOI: 10.1016/j.wroa.2023.100176] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 03/15/2023] [Accepted: 03/16/2023] [Indexed: 06/19/2023]
Abstract
Mixotrophic denitrification processes have a great potential in nitrogen removal in biological wastewater treatment processes. However, so far, few studies have focused on the mixotrophic denitrification system using Fe(II) as an exclusively assisted electron donors and the underlying mechanisms in such a process remain unclear. Furthermore, the mechanisms by which microorganisms cover carbon, nitrogen, phosphorus and iron in an iron-assisted mixotrophic system remain unrevealed. In this work, we explore the feasibility of using Fe(II) as an assisted electron donor for enhancing simultaneous nitrogen and phosphorus removal via long-term reactor operation and batch tests. The results show that Fe(II) could provide electrons for efficient nitrate reduction and that biological reactions played a predominant role in these systems. In these systems Thermomonas, a strain of nitrate-reduction Fe(II)-oxidation bacterium, was enriched and accounted for a maximum abundance of 60.2%. These findings indicate a great potential of the Fe(II)-assisted mixotrophic denitrification system for practical use as an efficient simultaneous nitrogen and phosphorus removal process.
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Affiliation(s)
- Yuan Pan
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China
- Anhui Province Key Laboratory of Industrial Wastewater and Environmental Treatment, Hefei 230026, China
| | - Ying-Ying Fu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Ke Zhou
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Tian Tian
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Yu-Sheng Li
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Han-Qing Yu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China
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7
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Ortmeyer F, Guerreiro MA, Begerow D, Banning A. Modified microbiology through enhanced denitrification by addition of various organic substances-temperature effect. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:60282-60293. [PMID: 37022539 PMCID: PMC10163118 DOI: 10.1007/s11356-023-26784-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 03/29/2023] [Indexed: 05/08/2023]
Abstract
Worldwide, the environmental nitrate (NO3-) problem is increasingly coming into focus. These increases in NO3- concentration result mainly from agricultural inputs and are further exacerbated by decreasing and finite geogenic NO3- degradation capacity in aquifers. Thus, treatment methods are becoming more and more important. In this study, the effects of enhanced denitrification with addition of organic carbon (C) on thereby autochthonous occurring microbiology and compared at room temperature as well as 10 °C were investigated. Incubation of bacteria and fungi was carried out using natural sediments without degradation capacity and groundwater with high NO3- concentrations. Addition of the four applied substrates (acetate, glucose, ascorbic acid, and ethanol) results in major differences in microbial community. Cooling to 10 °C changes the microbiology again. Relative abundances of bacteria are strongly influenced by temperature, which is probably the explanation for different denitrification rates. Fungi are much more sensitive to the milieu change with organic C. Different fungi taxa preferentially occur at one of the two temperature approaches. Major modifications of the microbial community are mainly observed whose denitrification rates strongly depend on the temperature effect. Therefore, we assume a temperature optimum of enhanced denitrification specific to each substrate, which is influenced by the microbiology.
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Affiliation(s)
- Felix Ortmeyer
- Hydrogeology Department, Ruhr-Universität Bochum, Universitätsstraße 150, 44801, Bochum, Germany.
- Geological Survey of Denmark and Greenland, Øster Voldgade 10, 1350 Copenhagen and Universitetsbyen 81, 8000, Aarhus, Denmark.
| | - Marco Alexandre Guerreiro
- Department of Evolution of Plants and Fungi, Ruhr-Universität Bochum, Universitätsstraße 150, 44801, Bochum, Germany
- Environmental Genomics, Christian-Albrechts University of Kiel, Am Botanischen Garten 1-9, 24118, Kiel, Germany
- Max Planck Institute for Evolutionary Biology, August-Thienemann-Str. 2, 24306, Plön, Germany
| | - Dominik Begerow
- Department of Evolution of Plants and Fungi, Ruhr-Universität Bochum, Universitätsstraße 150, 44801, Bochum, Germany
- University of Hamburg, Institute of Plant Sciences and Microbiology, Ohnhorststr. 18, 22609, Hamburg, Germany
| | - Andre Banning
- School of Biological, Earth and Environmental Sciences, University College Cork, Distillery Fields, North Mall, Cork, T23 N73K, Ireland
- University College Cork, Environmental Research Institute, Lee Road, Cork, T23 XE10, Ireland
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8
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Ahmed SM, Rind S, Rani K. Systematic review: External carbon source for biological denitrification for wastewater. Biotechnol Bioeng 2023; 120:642-658. [PMID: 36420631 DOI: 10.1002/bit.28293] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/29/2022] [Accepted: 11/20/2022] [Indexed: 11/25/2022]
Abstract
Nitrogen mitigation is serious environmental issue around the globe. Several methods for wastewater treatment have been introduced, but biological denitrification has been recommended, particularly with addition of the best external carbon source. The key sites of denitrification are wetlands; it can be carried out with different methods. To highlight the aforementioned technology, this paper deals to review the literature to evaluate biological denitrification and to demonstrate cost effective external carbon sources. The results of systematic review disclose the denitrification process and addition of different external carbon sources. The online literature exploration was accomplished using the most well-known databases, that is, science direct and the web of science database, resulting 625 review articles and 3084 research articles, published in peer-reviewed journals between 2015 and 2021 were identified in first process. After doing an in-depth literature survey and exclusion criteria, we started to shape the review from selected review and research articles. A number of studies confirmed that both nitrification and denitrification are significant for biological treatment of wastewater. The studies proved that the carbon source is the main contributor and is a booster for the denitrification. Based on the literature reviewed it is concluded that biological denitrification with addition of external carbon source is cost effective and best option in nitrogen mitigation in a changing world. Our study recommends textile waste for recovery of carbon source.
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Affiliation(s)
- Sanjrani Manzoor Ahmed
- College of Environmental Science and Engineering, Donghua University, Shanghai, China.,HANDS-Institute of Development Studies, Karachi, Pakistan
| | - Saeeda Rind
- Department of Chemistry, University of Sindh Jamshoro, Jamshoro, Pakistan
| | - Keenjhar Rani
- Liaquat University of Medical and Health Sciences, Jamshoro, Pakistan
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Zhang Y, Wang JH, Zhang JT, Chi ZY, Kong FT, Zhang Q. The long overlooked microalgal nitrous oxide emission: Characteristics, mechanisms, and influencing factors in microalgae-based wastewater treatment scenarios. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 856:159153. [PMID: 36195148 DOI: 10.1016/j.scitotenv.2022.159153] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 09/27/2022] [Accepted: 09/28/2022] [Indexed: 06/16/2023]
Abstract
Microalgae-based wastewater treatment is particularly advantageous in simultaneous CO2 sequestration and nutrients recovery, and has received increasing recognition and attention in the global context of synergistic pollutants and carbon reduction. However, the fact that microalgae themselves can generate the potent greenhouse gas nitrous oxide (N2O) has been long overlooked, most previous research mainly regarded microalgae as labile organic carbon source or oxygenic approach that interfere bacterial nitrification-denitrification and the concomitant N2O production. This study, therefore, summarized the amount and rate of N2O emission in microalgae-based systems, interpreted in-depth the multiple pathways that lead to NO formation as the key precursor of N2O, and the pathways that transform NO into N2O. Reduction of nitrite could take place in either the cytoplasm or the mitochondria to form NO by a series of enzymes, while the NO could be enzymatically reduced to N2O at the chloroplasts or the mitochondria respectively under light and dark conditions. The influences of abiotic factors on microalgal N2O emission were analyzed, including nitrogen types and concentrations that directly affect the nitrogen transformation routes, illumination and oxygen conditions that regulate the enzymatic activities related to N2O generation, and other factors that indirectly interfere N2O emission via NO regulation. The uncertainty of microalgae-based N2O emission in wastewater treatment scenarios were emphasized, which would be particularly impacted by the complex competition between microalgae and ammonia oxidizing bacteria or nitrite oxidizing bacteria over ammonium or inorganic carbon source. Future studies should put more efforts in improving the compatibility of N2O emission results expressions, and adopting consistent NO detection methods for N2O emission prediction. This review will provide much valuable information on the characteristics and mechanisms of microalgal N2O emission, and arouse more attention to the non-negligible N2O emission that may impair overall greenhouse gas reduction efficiency in microalgae-based wastewater treatment systems.
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Affiliation(s)
- Ying Zhang
- School of Bioengineering, Dalian University of Technology, Dalian 116024, PR China
| | - Jing-Han Wang
- School of Bioengineering, Dalian University of Technology, Dalian 116024, PR China; Key Laboratory of Environment Controlled Aquaculture, Dalian Ocean University, Dalian 116023, PR China.
| | - Jing-Tian Zhang
- School of Bioengineering, Dalian University of Technology, Dalian 116024, PR China
| | - Zhan-You Chi
- School of Bioengineering, Dalian University of Technology, Dalian 116024, PR China
| | - Fan-Tao Kong
- School of Bioengineering, Dalian University of Technology, Dalian 116024, PR China
| | - Qian Zhang
- Key Laboratory of Environment Controlled Aquaculture, Dalian Ocean University, Dalian 116023, PR China
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10
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Xu B, Yang X, Li Y, Yang K, Xiong Y, Yuan N. Pyrite-Based Autotrophic Denitrifying Microorganisms Derived from Paddy Soils: Effects of Organic Co-Substrate Addition. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:11763. [PMID: 36142037 PMCID: PMC9517464 DOI: 10.3390/ijerph191811763] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 09/12/2022] [Accepted: 09/15/2022] [Indexed: 06/16/2023]
Abstract
The presence of organic co-substrate in groundwater and soils is inevitable, and much remains to be learned about the roles of organic co-substrates during pyrite-based denitrification. Herein, an organic co-substrate (acetate) was added to a pyrite-based denitrification system, and the impact of the organic co-substrate on the performance and bacterial community of pyrite-based denitrification processes was evaluated. The addition of organic co-substrate at concentrations higher than 48 mg L-1 inhibited pyrite-based autotrophic denitrification, as no sulfate was produced in treatments with high organic co-substrate addition. In contrast, both competition and promotion effects on pyrite-based autotrophic denitrification occurred with organic co-substrate addition at concentrations of 24 and 48 mg L-1. The subsequent validation experiments suggested that competition had a greater influence than promotion when organic co-substrate was added, even at a low concentration. Thiobacillus, a common chemolithoautotrophic sulfur-oxidizing denitrifier, dominated the system with a relative abundance of 13.04% when pyrite served as the sole electron donor. With the addition of organic co-substrate, Pseudomonas became the dominant genus, with 60.82%, 61.34%, 70.37%, 73.44%, and 35.46% abundance at organic matter concentrations of 24, 48, 120, 240, and 480 mg L-1, respectively. These findings provide an important theoretical basis for the cultivation of pyrite-based autotrophic denitrifying microorganisms for nitrate removal in soils and groundwater.
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Affiliation(s)
- Baokun Xu
- Agricultural Water Conservancy Department, Changjiang River Scientific Research Institute, Wuhan 430010, China
- State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
- Key Laboratory of River Regulation and Flood Control of Ministry of Water Resources, Changjiang River Scientific Research Institute, Wuhan 430010, China
| | - Xiaoxia Yang
- Chongqing Water Resources Bureau, Chongqing 401147, China
| | - Yalong Li
- Agricultural Water Conservancy Department, Changjiang River Scientific Research Institute, Wuhan 430010, China
| | - Kejun Yang
- School of Law, Zhongnan University of Economics and Law, Wuhan 430073, China
- Agricultural and Rural Department of Hubei Province, Wuhan 430070, China
| | - Yujiang Xiong
- Agricultural Water Conservancy Department, Changjiang River Scientific Research Institute, Wuhan 430010, China
| | - Niannian Yuan
- Agricultural Water Conservancy Department, Changjiang River Scientific Research Institute, Wuhan 430010, China
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11
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Hallberg L, Hallin S, Bieroza M. Catchment controls of denitrification and nitrous oxide production rates in headwater remediated agricultural streams. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:156513. [PMID: 35679930 DOI: 10.1016/j.scitotenv.2022.156513] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 06/01/2022] [Accepted: 06/02/2022] [Indexed: 06/15/2023]
Abstract
Heavily modified headwater streams and open ditches carry high nitrogen loads from agricultural soils that sustain eutrophication and poor water quality in downstream aquatic ecosystems. To remediate agricultural streams and reduce the export of nitrate (NO3-), phosphorus and suspended sediments, two-stage ditches with constructed floodplains can be implemented as countermeasures. By extending hydrological connectivity between the stream channel and riparian corridor within constructed floodplains, these remediated ditches enhance the removal of NO3- via the microbial denitrification process. Ten remediated ditches were paired with upstream trapezoidal ditches in Sweden across different soils and land uses to measure the capacity for denitrification and nitrous oxide (N2O) production and yields under denitrifying conditions in stream and floodplain sediments. To examine the controls for denitrification, water quality was monitored monthly and flow discharge continuously along reaches. Floodplain sediments accounted for 33 % of total denitrification capacity of remediated ditches, primarily controlled by inundation and stream NO3- concentrations. Despite reductions in flow-weighted NO3- concentrations along reaches, NO3- removal in remediated ditches via denitrification can be masked by inputs of NO3--rich groundwaters, typical of intensively managed agricultural landscapes. Although N2O production rates were 50 % lower in floodplains compared to the stream, remediated ditches emitted more N2O than conventional trapezoidal ditches. Higher denitrification rates and reductions of N2O proportions were predicted by catchments with loamy soils, higher proportions of agricultural land use and lower floodplain elevations. For realizing enhanced NO3- removal from floodplains and avoiding increased N2O emissions, soil type, land use and the design of floodplains need to be considered when implementing remediated streams. Further, we stress the need for assessing the impact of stream remediation in the context of broader catchment processes, to determine the overall potential for improving water quality.
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Affiliation(s)
- Lukas Hallberg
- Department of Soil and Environment, Swedish University of Agricultural Sciences, Uppsala, Sweden.
| | - Sara Hallin
- Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Magdalena Bieroza
- Department of Soil and Environment, Swedish University of Agricultural Sciences, Uppsala, Sweden
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12
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Yang P, Tang KW, Tong C, Lai DYF, Wu L, Yang H, Zhang L, Tang C, Hong Y, Zhao G. Changes in sediment methanogenic archaea community structure and methane production potential following conversion of coastal marsh to aquaculture ponds. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 305:119276. [PMID: 35405221 DOI: 10.1016/j.envpol.2022.119276] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 03/08/2022] [Accepted: 04/05/2022] [Indexed: 06/14/2023]
Abstract
Widespread conversion of coastal wetlands into aquaculture ponds in coastal region often results in degradation of the wetland ecosystems, but its effects on sediment's potential to produce greenhouse gases remain unclear. Using field sampling, incubation experiments and molecular analysis, we studied the sediment CH4 production potential and the relevant microbial communities in a brackish marsh and the nearby aquaculture ponds in the Min River Estuary in southeastern China. Sediment CH4 production potential was higher in the summer and autumn months than in spring and winter months, and it was significantly correlated with sediment carbon content among all environmental variables. The mean sediment CH4 production potential in the aquaculture ponds (20.1 ng g-1 d-1) was significantly lower than that in the marsh (45.2 ng g-1 d-1). While Methanobacterium dominated in both habitats (41-59%), the overall composition of sediment methanogenic archaea communities differed significantly between the two habitats (p < 0.05) and methanogenic archaea alpha diversity was lower in the aquaculture ponds (p < 0.01). Network analysis revealed that interactions between sediment methanogenic archaea were much weaker in the ponds than in the marsh. Overall, these findings suggest that conversion of marsh land to aquaculture ponds significantly altered the sediment methanogenic archaea community structure and diversity and lowered the sediment's capacity to produce CH4.
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Affiliation(s)
- Ping Yang
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, PR China; Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350007, PR China; Research Centre of Wetlands in Subtropical Region, Fujian Normal University, Fuzhou, 350007, PR China.
| | - Kam W Tang
- Department of Biosciences, Swansea University, Swansea, SA2 8PP, UK
| | - Chuan Tong
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, PR China; Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350007, PR China; Research Centre of Wetlands in Subtropical Region, Fujian Normal University, Fuzhou, 350007, PR China
| | - Derrick Y F Lai
- Department of Geography and Resource Management, The Chinese University of Hong Kong, Hong Kong, China
| | - Lianzuan Wu
- Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350007, PR China
| | - Hong Yang
- College of Environmental Science and Engineering, Fujian Normal University, Fuzhou, 350007, China; Department of Geography and Environmental Science, University of Reading, Reading, UK
| | - Linhai Zhang
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, PR China; Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350007, PR China; Research Centre of Wetlands in Subtropical Region, Fujian Normal University, Fuzhou, 350007, PR China
| | - Chen Tang
- Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350007, PR China
| | - Yan Hong
- Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350007, PR China
| | - Guanghui Zhao
- Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350007, PR China
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13
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Stuchiner ER, von Fischer JC. Using isotope pool dilution to understand how organic carbon additions affect N 2 O consumption in diverse soils. GLOBAL CHANGE BIOLOGY 2022; 28:4163-4179. [PMID: 35377524 PMCID: PMC9321687 DOI: 10.1111/gcb.16190] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 02/24/2022] [Accepted: 03/24/2022] [Indexed: 06/14/2023]
Abstract
Nitrous oxide (N2 O) is a formidable greenhouse gas with a warming potential ~300× greater than CO2 . However, its emissions to the atmosphere have gone largely unchecked because the microbial and environmental controls governing N2 O emissions have proven difficult to manage. The microbial process N2 O consumption is the only know biotic pathway to remove N2 O from soil pores and therefore reduce N2 O emissions. Consequently, manipulating soils to increase N2 O consumption by organic carbon (OC) additions has steadily gained interest. However, the response of N2 O emissions to different OC additions are inconsistent, and it is unclear if lower N2 O emissions are due to increased consumption, decreased production, or both. Simplified and systematic studies are needed to evaluate the efficacy of different OC additions on N2 O consumption. We aimed to manipulate N2 O consumption by amending soils with OC compounds (succinate, acetate, propionate) more directly available to denitrifiers. We hypothesized that N2 O consumption is OC-limited and predicted these denitrifier-targeted additions would lead to enhanced N2 O consumption and increased nosZ gene abundance. We incubated diverse soils in the laboratory and performed a 15 N2 O isotope pool dilution assay to disentangle microbial N2 O emissions from consumption using laser-based spectroscopy. We found that amending soils with OC increased gross N2 O consumption in six of eight soils tested. Furthermore, three of eight soils showed Increased N2 O Consumption and Decreased N2 O Emissions (ICDE), a phenomenon we introduce in this study as an N2 O management ideal. All three ICDE soils had low soil OC content, suggesting ICDE is a response to relaxed C-limitation wherein C additions promote soil anoxia, consequently stimulating the reduction of N2 O via denitrification. We suggest, generally, OC additions to low OC soils will reduce N2 O emissions via ICDE. Future studies should prioritize methodical assessment of different, specific, OC-additions to determine which additions show ICDE in different soils.
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Affiliation(s)
- Emily R. Stuchiner
- Graduate Degree Program in EcologyColorado State UniversityFort CollinsColoradoUSA
- Department of BiologyColorado State UniversityFort CollinsColoradoUSA
| | - Joseph C. von Fischer
- Graduate Degree Program in EcologyColorado State UniversityFort CollinsColoradoUSA
- Department of BiologyColorado State UniversityFort CollinsColoradoUSA
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14
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Hellman M, Valhondo C, Martínez-Landa L, Carrera J, Juhanson J, Hallin S. Nitrogen Removal Capacity of Microbial Communities Developing in Compost- and Woodchip-Based Multipurpose Reactive Barriers for Aquifer Recharge With Wastewater. Front Microbiol 2022; 13:877990. [PMID: 35685927 PMCID: PMC9171435 DOI: 10.3389/fmicb.2022.877990] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 04/21/2022] [Indexed: 12/04/2022] Open
Abstract
Global water supplies are threatened by climate changes and the expansion of urban areas, which have led to an increasing interest in nature-based solutions for water reuse and reclamation. Reclaimed water is a possible resource for recharging aquifers, and the addition of an organic reactive barrier has been proposed to improve the removal of pollutants. There has been a large focus on organic pollutants, but less is known about multifunctional barriers, that is, how barriers also remove nutrients that threaten groundwater ecosystems. Herein, we investigated how compost- and woodchip-based barriers affect nitrogen (N) removal in a pilot soil aquifer treatment facility designed for removing nutrients and recalcitrant compounds by investigating the composition of microbial communities and their capacity for N transformations. Secondary-treated, ammonium-rich wastewater was infiltrated through the barriers, and the changes in the concentration of ammonium, nitrate, and dissolved organic carbon (DOC) were measured after passage through the barrier during 1 year of operation. The development and composition of the microbial community in the barriers were examined, and potential N-transforming processes in the barriers were quantified by determining the abundance of key functional genes using quantitative PCR. Only one barrier, based on compost, significantly decreased the ammonium concentration in the infiltrated water. However, the reduction of reactive N in the barriers was moderate (between 21 and 37%), and there were no differences between the barrier types. All the barriers were after 1 year dominated by members of Alphaproteobacteria, Gammaproteobacteria, and Actinobacteria, although the community composition differed between the barriers. Bacterial classes belonging to the phylum Chloroflexi showed an increased relative abundance in the compost-based barriers. In contrast to the increased genetic potential for nitrification in the compost-based barriers, the woodchip-based barrier demonstrated higher genetic potentials for denitrification, nitrous oxide reduction, and dissimilatory reduction of nitrate to ammonium. The barriers have previously been shown to display a high capacity to degrade recalcitrant pollutants, but in this study, we show that most barriers performed poorly in terms of N removal and those based on compost also leaked DOC, highlighting the difficulties in designing barriers that satisfactorily meet several purposes.
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Affiliation(s)
- Maria Hellman
- Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Uppsala, Sweden
- *Correspondence: Maria Hellman,
| | - Cristina Valhondo
- Institute of Environmental Assessment and Water Research (IDAEA), CSIC, Barcelona, Spain
- Associate Unit, Hydrogeology Group (UPC-CSIC), Barcelona, Spain
| | - Lurdes Martínez-Landa
- Associate Unit, Hydrogeology Group (UPC-CSIC), Barcelona, Spain
- Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya (UPC), Barcelona, Spain
| | - Jesús Carrera
- Institute of Environmental Assessment and Water Research (IDAEA), CSIC, Barcelona, Spain
- Associate Unit, Hydrogeology Group (UPC-CSIC), Barcelona, Spain
| | - Jaanis Juhanson
- Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Sara Hallin
- Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Uppsala, Sweden
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15
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Zhang RC, Chen C, Xu XJ, Lee DJ, Ren NQ. The interaction between Pseudomonas C27 and Thiobacillus denitrificans in the integrated autotrophic and heterotrophic denitrification process. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 811:152360. [PMID: 34919932 DOI: 10.1016/j.scitotenv.2021.152360] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 12/07/2021] [Accepted: 12/08/2021] [Indexed: 06/14/2023]
Abstract
Compared to autotrophic and heterotrophic denitrification process, the integrated autotrophic and heterotrophic denitrification (IAHD) shows wider foreground of applications in the actual wastewaters with organic carbon, nitrogen and sulfur co-existing. The efficient co-removal of sulfur, nitrogen, and carbon in the IAHD system is guaranteed by the interaction between heterotrophic and autotrophic denitrificans. In order to further explore the interaction between functional bacteria, Pseudomonas C27 and Thiobacillus denitrifcans were selected as typical heterotrophic and autotrophic bacteria, and their characteristics metabolic responses to different sulfide concentrations were studied. Pseudomonas C27 had higher metabolic activity than T. denitrificans in the IAHD medium with sulfide concentration of 3.12-15.62 mmol/L. Moreover, the fastest sulfide removal rate (0.35 mmol/L·h) was achieved with a single inoculation of Pseudomonas C27. Meanwhile, in mixed inoculant conditions, the interaction between Pseudomonas C27 and T. denitrificans (P:T = 3:1, P:T = 1:1 and P:T = 1:3) yielded the highest sulfide removal efficiency (more than 85%) when sulfide concentration was 6.25-12.5 mmol/L. Additionally, the sulfide removal rate increased with the inoculation proportion of Pseudomonas C27. Thus, this apparent interaction provided a theoretical basis for further understanding and guidance on the efficient operation of IAHD system.
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Affiliation(s)
- Ruo-Chen Zhang
- School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Chuan Chen
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province 150090, China.
| | - Xi-Jun Xu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province 150090, China
| | - Duu-Jong Lee
- Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Nan-Qi Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province 150090, China
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16
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Choudhury MI, Hallin S, Ecke F, Hubalek V, Juhanson J, Frainer A, McKie BG. Disentangling the roles of plant functional diversity and plaint traits in regulating plant nitrogen accumulation and denitrification in freshwaters. Funct Ecol 2022. [DOI: 10.1111/1365-2435.14001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Maidul I. Choudhury
- Department Aquatic Sciences and Assessment Swedish University of Agricultural of Sciences Uppsala Sweden
| | - Sara Hallin
- Department of Forest Mycology and Plant Pathology Swedish University of Agricultural Sciences Uppsala Sweden
| | - Frauke Ecke
- Department Aquatic Sciences and Assessment Swedish University of Agricultural of Sciences Uppsala Sweden
- Department of Wildlife, Fish, and Environmental Studies Swedish University of Agricultural Sciences Umeå Sweden
| | - Valerie Hubalek
- Department of Forest Mycology and Plant Pathology Swedish University of Agricultural Sciences Uppsala Sweden
| | - Jaanis Juhanson
- Department of Forest Mycology and Plant Pathology Swedish University of Agricultural Sciences Uppsala Sweden
| | - André Frainer
- Norwegian Institute for Nature Research (NINA) Framsenteret Tromsø Norway
| | - Brendan G. McKie
- Department Aquatic Sciences and Assessment Swedish University of Agricultural of Sciences Uppsala Sweden
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17
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Wang X, Zhu H, Yan B, Shutes B, Bañuelos G, Wen H, Cheng R. Improving denitrification efficiency in constructed wetlands integrated with immobilized bacteria under high saline conditions. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 287:117592. [PMID: 34171725 DOI: 10.1016/j.envpol.2021.117592] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 05/18/2021] [Accepted: 06/12/2021] [Indexed: 06/13/2023]
Abstract
Constructed wetlands (CWs) inoculated with exogenous microbes have great potential for removing pollutants in adverse environments. The rapid loss of functional bacteria and the high cost of repeated additions of inoculum, however, limit the practical application of this technology. In this study, C-F2 immobilized bacteria (i.e., immobilized salt-tolerant bacterium Alishewanella sp. F2 incorporated with a carbon source) were developed and utilized in CWs for solving the above problems. A 60-day experiment demonstrated that bioaugmented CWs (Bio-CWs) with the addition of C-F2 immobilized bacteria into the bottom gravel layer of CW microcosms (B-CF2 treatment) exhibited high nitrogen removal efficiency under a saline condition (electrical conductivity of 15 mS/cm). We measured mean nitrate nitrogen (NO3--N) and total nitrogen (TN) removal percentages of 97.8% and 88.1%, respectively, which were significantly (p < 0.05) higher than those in Bio-CWs with microbial inoculum (MI-F2 treatment, 63.5% and 78.2%) and unbioaugmented CWs (CK, 48.7% and 67.2%). The TN content of the entire plant was significantly (p < 0.05) increased in B-CF2 (636.06 mg/microcosm) compared with CK (372.06 mg/microcosm). The relative abundances of the genera Alishewanella (i.e., the exogenous bacterium, 5.5%), Clostridium-XlVa (8.8%) and Bacteroides (21.1%) in B-CF2 were significantly (p < 0.05) higher than in MI-F2 and CK, which improved the denitrification capacity of CWs. Overall, a high denitrification efficiency and durability were achieved in the newly developed Bio-CWs (i.e., B-CF2 treatment) with immobilized bacteria under saline conditions, which provides an alternative technology for the rapid removal of nitrogen from saline wastewater.
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Affiliation(s)
- Xinyi Wang
- Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, China; Jilin Provincial Engineering Center of CWs Design in Cold Region & Beautiful Country Construction, Changchun, 130102, China
| | - Hui Zhu
- Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, China; Jilin Provincial Engineering Center of CWs Design in Cold Region & Beautiful Country Construction, Changchun, 130102, China.
| | - Baixing Yan
- Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, China; Jilin Provincial Engineering Center of CWs Design in Cold Region & Beautiful Country Construction, Changchun, 130102, China
| | - Brian Shutes
- Department of Natural Sciences, Middlesex University, Hendon, London, NW4 4BT, UK
| | - Gary Bañuelos
- USDA, Agricultural Research Service, San Joaquin Valley Agricultural Sciences Center, 9611 South Riverbend Avenue, Parlier, CA, 93648-9757, USA
| | - Huiyang Wen
- Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, China; Jilin Provincial Engineering Center of CWs Design in Cold Region & Beautiful Country Construction, Changchun, 130102, China
| | - Rui Cheng
- Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, China; Jilin Provincial Engineering Center of CWs Design in Cold Region & Beautiful Country Construction, Changchun, 130102, China
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18
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Yan S, Cheng KY, Ginige MP, Zheng G, Zhou L, Kaksonen AH. Optimization of nitrate and selenate reduction in an ethanol-fed fluidized bed reactor via redox potential feedback control. JOURNAL OF HAZARDOUS MATERIALS 2021; 402:123770. [PMID: 33254781 DOI: 10.1016/j.jhazmat.2020.123770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 08/07/2020] [Accepted: 08/18/2020] [Indexed: 06/12/2023]
Abstract
Electron donors are a major cost-factor in biological removal of oxyanions, such as nitrate and selenate from wastewater. In this study, an online ethanol dosing strategy based on feedback control of oxidation-reduction potential (ORP) was designed to optimize the performance of a lab-scale fluidized bed reactor (FBR) in treating selenate and nitrate (5 mM each) containing wastewater. The FBR performance was evaluated at various ORP setpoints ranging between -520 mV and -240 mV (vs. Ag/AgCl). Results suggested that both nitrate and selenate were completely removed at ORPs between -520 mV and -360 mV, with methylseleninic acid, selenocyanate, selenosulfate and ammonia being produced at low ORPs between -520 mV and -480 mV, likely due to overdosing of ethanol. At ORPs between -300 mV and -240 mV, limited ethanol dosing resulted in an apparent decline in selenate removal whereas nitrate removal remained stable. Resuming the ORP to -520 mV successfully restored complete selenate reduction. An optimal ORP of -400 mV was identified for the FBR, whereby selenate and nitrate were nearly completely removed with a minimal ethanol consumption. Overall, controlling ORP via feedback-dosing of the electron donor was an effective strategy to optimize FBR performance for reducing selenate and nitrate in wastewater.
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Affiliation(s)
- Su Yan
- Commonwealth Scientific and Industrial Research Organisation (CSIRO) Land and Water, 147 Underwood Avenue, Floreat WA, 6014, Australia; Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Ka Yu Cheng
- Commonwealth Scientific and Industrial Research Organisation (CSIRO) Land and Water, 147 Underwood Avenue, Floreat WA, 6014, Australia; School of Engineering and Information Technology, Murdoch University, Perth WA, Australia
| | - Maneesha P Ginige
- Commonwealth Scientific and Industrial Research Organisation (CSIRO) Land and Water, 147 Underwood Avenue, Floreat WA, 6014, Australia
| | - Guanyu Zheng
- Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Lixiang Zhou
- Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Anna H Kaksonen
- Commonwealth Scientific and Industrial Research Organisation (CSIRO) Land and Water, 147 Underwood Avenue, Floreat WA, 6014, Australia; School of Biomedical Sciences, University of Western Australia, 35 Stirling Highway, Nedlands, WA 6009, Australia.
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19
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Zhang RC, Chen C, Shao B, Wang W, Xu XJ, Zhou X, Xiang YN, Zhao L, Lee DJ, Ren NQ. Heterotrophic sulfide-oxidizing nitrate-reducing bacteria enables the high performance of integrated autotrophic-heterotrophic denitrification (IAHD) process under high sulfide loading. WATER RESEARCH 2020; 178:115848. [PMID: 32361288 DOI: 10.1016/j.watres.2020.115848] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 04/04/2020] [Accepted: 04/16/2020] [Indexed: 06/11/2023]
Abstract
Micro-aerobic enhancement technology has been developed as an effective tool to enhance simultaneous removal of sulfide, nitrate and organic carbon during the integrated autotrophic-heterotrophic denitrification (IAHD) process under high loading; however, its mechanism of enhancement for functional bacteria remains ambiguous. In this study, we discovered that heterotrophic sulfide-oxidizing nitrate-reducing bacteria (h-soNRB) are responsible for enhancing IAHD performance under micro-aerobic conditions with high sulfide loading. In a continuous IAHD bioreactor, aeration rate of 2.6 mL min-1·L-1 promoted 2 to 4 times higher removal efficiencies of sulfide, nitrate and acetate with an influent sulfide concentration of 18.75 mmol/L. Metagenomic analysis revealed that trace oxygen stimulated the abundance of genes responsible for sulfide oxidation (sqr, glpE, pdo, sox and cysK), which were upregulated by 15.2%-129.9%, and the genes encoding nitrate reductase were up-regulated by 67.4%. The increased acetate removal efficiency was attributed to upregulation of ack, pta and TCA cycle related genes. The h-NRB Pseudomonas, Azoarcus, Thauera and Halomonas were detected and regarded as h-soNRB in our bioreactor. According to Illumina MiSeq sequencing, these genera were absolutely dominant in the micro-aerobic microbial community at relative abundances ranging from 82.72% to 90.84%. The sulfide, nitrate and acetate removal rates of Pseudomonas C27, a typical h-soNRB, were at least 10 times higher under micro-aerobic conditions than under anaerobic conditions. Besides, the sulfur, nitrogen and carbon metabolic network was constructed based on the Pseudomonas C27 genome. The pdo and cysK genes found in this strain may be the most advantageous for autotrophic sulfide oxidizing nitrate reducing bacteria (a-soNRB), which are closely related to the high-efficiency sulfide, nitrate and acetate removal performance under high sulfide concentrations and a limited oxygen supply. In addition, after micro-aerobic cultivation, the anaerobic sulfide loading tolerance of the IAHD bioreactor increased from 18.75 to 37.5 mmol/L with sulfide, nitrate and acetate removal efficiencies increasing 1.5 to 3 times, which suggests that intermittent micro-aeration might be a more economical and efficient regime for high-sulfide IAHD regulation.
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Affiliation(s)
- Ruo-Chen Zhang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China; School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin, 300401, China
| | - Chuan Chen
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China.
| | - Bo Shao
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China
| | - Wei Wang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China
| | - Xi-Jun Xu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China
| | - Xu Zhou
- Engineering Laboratory of Microalgal Bioenergy, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, 518055, China
| | - Yu-Nong Xiang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China
| | - Lei Zhao
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China
| | - Duu-Jong Lee
- Department of Chemical Engineering, National Taiwan University, Taipei, 106, Taiwan; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, 106, Taiwan
| | - Nan-Qi Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China
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Yao Z, Yang L, Wang F, Tian L, Song N, Jiang H. Enhanced nitrate removal from surface water in a denitrifying woodchip bioreactor with a heterotrophic nitrifying and aerobic denitrifying fungus. BIORESOURCE TECHNOLOGY 2020; 303:122948. [PMID: 32058906 DOI: 10.1016/j.biortech.2020.122948] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 01/29/2020] [Accepted: 01/31/2020] [Indexed: 06/10/2023]
Abstract
A heterotrophic nitrifying and aerobic denitrifying fungus was isolated from lake water and identified as Penicillium tropicum strain IS0293. The strain exhibited efficient heterotrophic nitrification-aerobic denitrification ability and could utilize ammonium, nitrite and nitrate as a sole nitrogen source. Batch tests demonstrated that strain IS0293 can remove nitrate using variety of organic carbon compounds as carbon sources. The effect of woodchip leachate collected at different degradation times on denitrification performance of the strain was also investigated. Furthermore, two denitrifying woodchip bioreactors were constructed to assess the bioaugmention of strain IS0293 for nitrate removal from surface water. Results demonstrated that the incubation of strain IS0293 enhanced the nitrate removal efficiency of the bioreactor. In addition, the average effluent TOC content of the bioaugmention bioreactor was 38.22% lower than the control bioreactor. This study would be valuable to develop an effective technology for nitrate-laden surface water under aerobic conditions.
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Affiliation(s)
- Zongbao Yao
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Liu Yang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fang Wang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; College of Biology and Environment, Nanjing Forestry University, Nanjing 210037, China
| | - Linqi Tian
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China
| | - Na Song
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Helong Jiang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.
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