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Im HR, Im SJ, Nguyen DV, Jeong SP, Jang A. Real-time diagnosis and monitoring of biofilm and corrosion layer formation on different water pipe materials using non-invasive imaging methods. CHEMOSPHERE 2024; 361:142577. [PMID: 38857632 DOI: 10.1016/j.chemosphere.2024.142577] [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: 04/03/2024] [Revised: 06/06/2024] [Accepted: 06/07/2024] [Indexed: 06/12/2024]
Abstract
Water distribution networks play a crucial role in ensuring a reliable water supply, yet they encounter challenges such as corrosion, scale formation, and biofilm growth due to interactions with environmental elements. Biofilms and corrosion layers are significant contaminants in water pipes, formed by complex interactions with pipe materials. As the structure of these contamination layers varies depending on the pipe material, it is essential to investigate the contamination layer for each material individually. Specifically, biofilm growth is typically investigated concerning organic sources, while the growth of humus layers is examined in relation to inorganic elements such as manganese (Mn), iron (Fe), and aluminum (Al), which are major elements and organic substances found in water pipes. Real-time imaging of recently contaminated layers can provide important insights to improve system performance by optimizing operations and cleaning processes. In this study, cast iron (7.10 ± 0.78 nm) exhibits greater surface roughness compared to PVC (5.60 ± 0.14 nm) and provides favorable conditions for biofilm formation due to its positive charge. Over a period of 425 h, the fouling layer on cast iron and PVC surfaces gradually increased in fouling thickness, porosity, roughness, and density, reaching maximum value of 29.72 ± 3.6 μm, 11.44 ± 1.1%, 41673 ± 1025.6 pixels, and 0.80 ± 0.3 fouling layer pixel/layer pixel for cast iron, and 8.15 ± 0.4 μm, 20.64 ± 0.9%, 35916.6 ± 755.7 pixels, and 0.58 ± 0.1 fouling layer pixel/layer pixel, respectively. Within the scope of the current research, CNN model demonstrates high correlation coefficients (0.98 and 0.91) in predicting biofilm thickness for cast iron and PVC. The model also presented high accuracy in predicting porosity for both materials (over 0.91 for cast iron and 0.96 for PVC). While the model accurately predicted biofilm roughness and density for cast iron (correlation coefficients 0.98 and 0.94, respectively), it had lower accuracy for PVC (correlation coefficients 0.92 for both parameters).
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Affiliation(s)
- Hong Rae Im
- Department of Global Smart City, Sungkyunkwan University (SKKU), 2066, Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do, 16419, Republic of Korea.
| | - Sung Ju Im
- Department of Environmental Engineering, Gyeongsang National University, 33 Dongjin-ro, Jinju, 52725, Republic of Korea.
| | - Duc Viet Nguyen
- Centre for Environmental and Energy Research, Ghent University Global Campus, Songdomunhwa-ro, Yeonsu-gu, Incheon-si, 21985, Republic of Korea.
| | - Seong Pil Jeong
- Water Cycle Research Center, Korea Institute of Science and Technology (KIST), Hwarangro 14 Gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea.
| | - Am Jang
- Department of Global Smart City, Sungkyunkwan University (SKKU), 2066, Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do, 16419, Republic of Korea.
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García S, Boullosa-Falces D, Sanz DS, Trueba A, Gomez-Solaetxe MA. Artificial-intelligence-model to optimize biocide dosing in seawater-cooled industrial process applications considering environmental, technical, energetic, and economic aspects. BIOFOULING 2024; 40:366-376. [PMID: 38855912 DOI: 10.1080/08927014.2024.2363241] [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: 01/07/2024] [Accepted: 05/26/2024] [Indexed: 06/11/2024]
Abstract
This research introduces an Artificial Intelligence (AI) based model designed to concurrently optimize energy supply management, biocide dosing, and maintenance scheduling for heat exchangers. This optimization considers energetic, technical, economic, and environmental considerations. The impact of biofilm on heat exchangers is assessed, revealing a 41% reduction in thermal efficiency and a 113% increase in flow frictional resistance of the fluid compared to the initial state. Consequently, the pump's power consumption, required to maintain hydraulic conditions, rises by 9%. The newly developed AI model detects the point at which the heat exchanger's performance begins to decline due to accumulating dirt, marking day 44 of experimentation as the threshold to commence the antifouling biocide dosing. Leveraging this AI model to monitor heat exchanger efficiency represents an innovative approach to optimizing antifouling biocide dosing and reduce the environmental impact stemming from industrial plants.
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Affiliation(s)
- Sergio García
- Departamento Ciencias, Técnicas de la Navegación y de la Construcción Naval, Universidad de Cantabria, Santander, Spainy
| | - David Boullosa-Falces
- Department of Energy Engineering, University of the Basque Country UPV/EHU, Portugalete, Spain
| | - David S Sanz
- Departamento Ciencias, Técnicas de la Navegación y de la Construcción Naval, Universidad de Cantabria, Santander, Spainy
| | - Alfredo Trueba
- Departamento Ciencias, Técnicas de la Navegación y de la Construcción Naval, Universidad de Cantabria, Santander, Spainy
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Liu Z, Xiao Y, Muhammad T, Zhou Y, Hou P, Zha Y, Yu R, Qu S, Ma C, Li Y. Combination of magnetic field and ultraviolet for fouling control in saline wastewater distribution systems. WATER RESEARCH 2024; 251:121118. [PMID: 38219689 DOI: 10.1016/j.watres.2024.121118] [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: 04/24/2023] [Revised: 12/04/2023] [Accepted: 01/07/2024] [Indexed: 01/16/2024]
Abstract
Fouling is a significant challenge for recycling and reusing saline wastewaters for industrial, agricultural or municipal applications. In this study, we propose a novel approach of magnetic field (MaF) and ultraviolet (UV) combined application for fouling mitigation. Results showed, combination of MaF and UV (MaF-UV) significantly decreased the content of biofouling and reduced the complexity of microbial networks, compared to UV and MaF alone treatments. This was due to MaF as pretreatment effectively reduced the water turbidity, improve the influent water quality of UV disinfection and increases UV transmittance, eliminating the adverse impacts of UV scattering and shielding, hence increased the inactivation effectiveness of UV disinfection process. MaF assisted UV also reduced the abundance of UV-resistant bacteria and inhibited the risk of bacterial photoreactivation and dark repair. Meanwhile, MaF-UV drastically reduced the contents of precipitates and particulate fouling by accelerating the transformation rate of CaCO3 crystal from compact calcite to loosen hydrated amorphous CaCO3, and enhancing the flocculation process. These findings demonstrated that MaF-UV is an effective anti-fouling strategy, and provide insights for sustainable application of saline wastewaters.
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Affiliation(s)
- Zeyuan Liu
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; Engineering Research Center for Agricultural Water-Saving and Water Resources, Ministry of Education, Beijing 100083, China; Inner Mongolia Key Laboratory of River and Lake Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot 010070, China; Key Laboratory of Mongolian Plateau Ecology and Resource Utilization, Ministry of Education, Hohhot 010070, China
| | - Yang Xiao
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; Engineering Research Center for Agricultural Water-Saving and Water Resources, Ministry of Education, Beijing 100083, China
| | - Tahir Muhammad
- College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China
| | - Yunpeng Zhou
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; Engineering Research Center for Agricultural Water-Saving and Water Resources, Ministry of Education, Beijing 100083, China
| | - Peng Hou
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; Engineering Research Center for Agricultural Water-Saving and Water Resources, Ministry of Education, Beijing 100083, China
| | - Yingdong Zha
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; Engineering Research Center for Agricultural Water-Saving and Water Resources, Ministry of Education, Beijing 100083, China
| | - Ruihong Yu
- Inner Mongolia Key Laboratory of River and Lake Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot 010070, China; Key Laboratory of Mongolian Plateau Ecology and Resource Utilization, Ministry of Education, Hohhot 010070, China
| | - Shen Qu
- Inner Mongolia Key Laboratory of River and Lake Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot 010070, China; Key Laboratory of Mongolian Plateau Ecology and Resource Utilization, Ministry of Education, Hohhot 010070, China
| | - Changjian Ma
- State Key Laboratory of Nutrient Use and Management, National Agricultural Experimental Station for Soil Quality (Jinan), Institute of Agricultural Resources and Environment, Shandong Academy of Agricultural Sciences, Jinan, China
| | - Yunkai Li
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; Engineering Research Center for Agricultural Water-Saving and Water Resources, Ministry of Education, Beijing 100083, China.
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Di Lodovico S, Petrini M, D'Amico E, Di Fermo P, Diban F, D'Arcangelo S, Piattelli A, Cellini L, Iezzi G, Di Giulio M, D'Ercole S. Complex magnetic fields represent an eco-sustainable technology to counteract the resistant Candida albicans growth without affecting the human gingival fibroblasts. Sci Rep 2023; 13:22067. [PMID: 38086849 PMCID: PMC10716184 DOI: 10.1038/s41598-023-49323-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 12/06/2023] [Indexed: 12/18/2023] Open
Abstract
Novel technologies such as complex magnetic fields-CMFs represent an eco-sustainable proposal to counteract the infection associated to resistant microorganisms. The aim of this study was to evaluate the effect of two CMF programs (STRESS, ANTIBACTERIAL) against clinical antifungal resistant C. albicans also evaluating their uneffectiveness on gingival fibroblasts (hGFs). The STRESS program was more efficacious on C. albicans biofilm with up to 64.37% ± 10.80 of biomass and up to 99.19% ± 0.06 CFU/ml reductions in respect to the control also inducing an alteration of lipidic structure of the membrane. The MTT assay showed no CMFs negative effects on the viability of hGFs with a major ROS production with the ANTIBACTERIAL program at 3 and 24 h. For the wound healing assay, STRESS program showed the best effect in terms of the rate migration at 24 h, showing statistical significance of p < 0.0001. The toluidine-blue staining observations showed the typical morphology of cells and the presence of elongated and spindle-shaped with cytoplasmic extensions and lamellipodia was observed by SEM. The ANTIBACTERIAL program statistically increased the production of collagen with respect to control and STRESS program (p < 0.0001). CMFs showed a relevant anti-virulence action against C. albicans, no cytotoxicity effects and a high hGFs migration rate. The results of this study suggest that CMFs could represent a novel eco-sustainable strategy to counteract the resistant yeast biofilm infections.
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Affiliation(s)
- Silvia Di Lodovico
- Department of Pharmacy, University "G. d'Annunzio" Chieti-Pescara, Via dei Vestini, 31, 66100, Chieti, Italy
| | - Morena Petrini
- Department of Medical Oral and Biotechnological Sciences, University "G. d'Annunzio" Chieti-Pescara, Via dei Vestini, 31, 66100, Chieti, Italy
| | - Emira D'Amico
- Department of Medical Oral and Biotechnological Sciences, University "G. d'Annunzio" Chieti-Pescara, Via dei Vestini, 31, 66100, Chieti, Italy
| | - Paola Di Fermo
- Department of Medical Oral and Biotechnological Sciences, University "G. d'Annunzio" Chieti-Pescara, Via dei Vestini, 31, 66100, Chieti, Italy
| | - Firas Diban
- Department of Pharmacy, University "G. d'Annunzio" Chieti-Pescara, Via dei Vestini, 31, 66100, Chieti, Italy
| | - Sara D'Arcangelo
- Department of Pharmacy, University "G. d'Annunzio" Chieti-Pescara, Via dei Vestini, 31, 66100, Chieti, Italy
| | - Adriano Piattelli
- School of Dentistry, Saint Camillus International, University of Health and Medical Sciences, Via di Sant'Alessandro 8, 00131, Rome, Italy
- Facultad de Medicina, UCAM Universidad Catolica San Antonio de Murcia, 30107, Murcia, Spain
| | - Luigina Cellini
- Department of Pharmacy, University "G. d'Annunzio" Chieti-Pescara, Via dei Vestini, 31, 66100, Chieti, Italy
| | - Giovanna Iezzi
- Department of Medical Oral and Biotechnological Sciences, University "G. d'Annunzio" Chieti-Pescara, Via dei Vestini, 31, 66100, Chieti, Italy
| | - Mara Di Giulio
- Department of Pharmacy, University "G. d'Annunzio" Chieti-Pescara, Via dei Vestini, 31, 66100, Chieti, Italy
| | - Simonetta D'Ercole
- Department of Medical Oral and Biotechnological Sciences, University "G. d'Annunzio" Chieti-Pescara, Via dei Vestini, 31, 66100, Chieti, Italy.
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5
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Khu ST, Changchun X, Wang T. Effects of flow velocity on biofilm composition and microbial molecular ecological network in reclaimed water distribution systems. CHEMOSPHERE 2023; 341:140010. [PMID: 37652246 DOI: 10.1016/j.chemosphere.2023.140010] [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: 11/10/2022] [Revised: 08/03/2023] [Accepted: 08/27/2023] [Indexed: 09/02/2023]
Abstract
The existence of biofilm on the reclaimed water pipeline seriously affects the safety of water distribution. And the flow regimes in the pipeline play a crucial role in the growth of biofilms. In this study, the biofilm composition, surface topography and bacterial community were detected under eight levels of flow velocity in the range of 0.10-1.40 m s-1. The results showed that the dry weight, the concentration of extracellular protein and extracellular polysaccharide in the biofilm reached a dynamic stable period after 640 h. The biofilm composition and surface topography of biofilm were significantly different under the different flow regimes (laminar flow belongs to [0.10, 0.19] m s-1, and turbulent flow belongs to [0.29, 1.40] m s-1). As the flow velocity range increases, the concentration of each component in the biofilm and the parameters of biofilm surface topography increased and then decreased. The flow velocity could be a strong environmental stimulus resulting in the succession of bacterial community in biofilm. As the flow velocity increased from 0.10 m s-1 to 1.40 m s-1, at the phylum level, the average relative abundance of Firmicutes mainly showed a trend of first increasing and then decreasing with the highest abundance value of 71.57% at 0.49 m s-1. The flow velocity increased from 0.10 m s-1 to 0.49 m s-1, a significant increase in microbial diversity could be detected. The increase in flow velocity promoted the proliferation of microorganisms, and the interaction between different microbial components was enhanced. At 0.49 m s-1, the function of the biofilm is complex, and the ability to resist environmental stress is the strongest. This study can effectively improve the cognition depth of biofilms under the influence of flow velocity in the reclaimed water distribution systems, and provide an important theoretical support for the safe distribution of reclaimed water.
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Affiliation(s)
- Soon-Thiam Khu
- School of Environmental Science & Engineering, Tianjin University, Tianjin, 300350, China; Engineering Research Center of City intelligence and Digital Governance, Ministry of Education of the People's Republic of China, Tianjin, 300350, China
| | - Xin Changchun
- School of Environmental Science & Engineering, Tianjin University, Tianjin, 300350, China
| | - Tianzhi Wang
- School of Environmental Science & Engineering, Tianjin University, Tianjin, 300350, China.
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6
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Wang T, Zhang T, Dai X, Wang W, Wang J. Control strategies for biofilm control in reclaimed water distribution systems from the perspective of microbial antagonism and electrochemistry. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 834:155289. [PMID: 35447190 DOI: 10.1016/j.scitotenv.2022.155289] [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: 02/28/2022] [Revised: 03/30/2022] [Accepted: 04/11/2022] [Indexed: 06/14/2023]
Abstract
Biofilm formation in reclaimed water (RW) distribution systems presents significant technical challenges to RW utilization. Two main technologies to control biofilm formation, microbial antagonism (MA) and electrochemical oxidation (EO), are not yet widely used in drip irrigation systems (DIS) and their mechanisms of action need further clarification. In this study, we first showed that the MA and EO treatments reduced biofilm formation by about 62% and 68%, respectively, and extracellular polymeric substance (EPS) content by 14% and 49%, respectively, in biofilms compared with raw RW type 1 (R-RW1) in unused pipes, thus effectively improving the performance of DIS. When MA-RW and EO-RW were applied to already clogged systems, the degree of clogging alleviation varied depending on the severity of the original clogging. We recommend adding the antagonist, Bacillus subtilis, to RW at 25% clogging for the maximum effect and to slow the microbial adaptation process. Compared to MA, the recovery effect of EO was slower initially but lasted longer and had a significantly better alleviating effect on severely clogged pipelines. Illumina Mi-SEQ high-throughput sequencing data showed that both MA and EO resulted in a significant decrease in microbial diversity, dynamic changes in bacterial community structure, and disruption of network interaction and network modularity. Meanwhile, both treatments promoted the growth of specific microorganisms, enhanced the interaction between certain microbial components, and improved the efficiency of information, matter, and energy exchange within the modules. In summary, we verified the dredging effect of two strategies on DIS under different water conditions, revealed the differences in their mechanisms of action, and proposed their application scenarios. Our results will help improve the efficiency of RW in agricultural drip irrigation systems and effectively reduce maintenance costs.
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Affiliation(s)
- Tianzhi Wang
- School of Environmental Science & Engineering, Tianjin University, Tianjin 300350, China; College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
| | - Tianjiao Zhang
- School of Environmental Science & Engineering, Tianjin University, Tianjin 300350, China
| | - Xingda Dai
- School of Environmental Science & Engineering, Tianjin University, Tianjin 300350, China
| | - Weijie Wang
- School of Environmental Science & Engineering, Tianjin University, Tianjin 300350, China
| | - Jiehua Wang
- School of Environmental Science & Engineering, Tianjin University, Tianjin 300350, China.
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7
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Formation and Microbial Composition of Biofilms in Drip Irrigation System under Three Reclaimed Water Conditions. WATER 2022. [DOI: 10.3390/w14081216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
As the second source of water for cities, reclaimed water (RW) has become an effective solution to the problem of water scarcity in modern agriculture. However, the formation of biofilm in an RW distribution system seriously affects the performance of the system and has become a technical challenge in RW utilization. In this study, we first showed that several water quality parameters, including five-day biochemical oxygen demand (BOD5), total bacteria count (TB), total nitrogen (TN), and Cl− were the main factors affecting biofilm accumulation in the drip irrigation system (DIS), with the correlation coefficient averaging above 0.85. Second, after 392 to 490 h of system operation, the total biomass and extracellular polymer (EPS) accumulation rate of biofilms increased to a maximum of 0.72 g/m2·h and 0.027g/m2·h, respectively, making this time point a critical point for controlling biofilm accumulation and clogging of the system. Third, we examined changes in biofilm microbial composition over time on Illumina’s MiSeq platform. High throughput sequencing data showed that bacterial community structure and microbial network interaction and modularity changed significantly between 392 and 490 h, resulting in maximum microbial diversity and community richness at 490 h. Spearman correlation analyses between genera revealed that Sphingomonas and Rhodococcus promote biofilm formation due to their hydrophobicity, while Bacillus, Mariniradius, and Arthronema may inhibit biofilm formation due to their antagonistic effects on other genera. In conclusion, this work has clarified the accumulation process and compositional changes of biofilms in agriculture DIS under different RW conditions, which provides a basis for improving RW utilization efficiency and reducing system maintenance costs.
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8
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Jiang W, Xu X, Johnson D, Lin L, Wang H, Xu P. Effectiveness and mechanisms of electromagnetic field on reverse osmosis membrane scaling control during brackish groundwater desalination. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.119823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Muhammad T, Li L, Xiao Y, Zhou Y, Liu Z, He X, Bazai NA, Li Y. Multiple fouling dynamics, interactions and synergistic effects in brackish surface water distribution systems. CHEMOSPHERE 2022; 287:132268. [PMID: 34555585 DOI: 10.1016/j.chemosphere.2021.132268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 09/12/2021] [Accepted: 09/14/2021] [Indexed: 06/13/2023]
Abstract
Dissolved salts, colloidal particles, and active microorganisms in brackish surface water distribution systems (BSWD) cause multiple fouling, poses potential threat to the environmental pollution, and raising technical and economic issues as well. So far, the co-occurrence and interactions of multiple fouling remains largely unknown. Multiple fouling behaviors were assessed in agriculture BSWD under different nitrogen (N) fertilizers. X-ray diffraction, Rietveld refinement analysis, 16S rRNA, and microbial network analysis were conducted to determine the fouling characteristics. Statistical analysis was applied to reveal the relative contributions and interaction of multiple fouling. Our results demonstrated, multiple fouling of precipitates, particulates and biofoulings were co-occurred. Fouling growth was largely attributed to the strong interactions of different fouling. The binary interactions of precipitates - particulates contributed 51.1%, and ternary interactions of precipitates - particulates - biofouling contributed 25.4% to explain the decline of system performance, while the contribution of each single type fouling was minimal. Thereby indicating the significant role of calcium silica, biomineralization and bio-silicates in fouling. The lower acid N fertilizer broken the interaction of multiple fouling by increasing the precipitate crystal parameters and repulsive forces amongst particulates, as well as destroyed microbial interactions in biofouling. Overall, this study open frontier for multiple fouling in-depth profiling and antifouling guidance for effective utilization of BSWD.
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Affiliation(s)
- Tahir Muhammad
- College of Water Resources and Civil Engineering, China Agricultural University, China.
| | - Lei Li
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, China.
| | - Yang Xiao
- College of Water Resources and Civil Engineering, China Agricultural University, China.
| | - Yunpeng Zhou
- College of Water Resources and Civil Engineering, China Agricultural University, China.
| | - Zeyuan Liu
- College of Water Resources and Civil Engineering, China Agricultural University, China.
| | - Xin He
- College of Water Resources and Civil Engineering, China Agricultural University, China.
| | - Nazir Ahmed Bazai
- Institute of Mountain Hazards and Environment, Chinese Academy of Sciences (CAS), Chengdu, China.
| | - Yunkai Li
- College of Water Resources and Civil Engineering, China Agricultural University, China; Engineering Research Center for Agricultural Water-Saving and Water Resources, Ministry of Education, China.
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Agostini VO, Muxagata E, Pinho GLL, Pessi IS, Macedo AJ. Bacteria-invertebrate interactions as an asset in developing new antifouling coatings for man-made aquatic surfaces. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 271:116284. [PMID: 33360655 DOI: 10.1016/j.envpol.2020.116284] [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: 08/14/2020] [Revised: 12/01/2020] [Accepted: 12/09/2020] [Indexed: 06/12/2023]
Abstract
Economic losses can result from biofouling establishment on man-made structures. Macrofouling causes damage to artificial substrates, which justifies the need for its control. However, the antifouling coatings employed nowadays are typically not safe for the environment. Microfouling can affect macrofouling colonization, and thus represents a potential target for alternative antifouling control. From both ecological and economical points of view, information on the ecology and interactions between micro- and macrofouling are crucial to develop successful and safe control strategies, which will prevent biofouling development on man-made structures while preserving water quality and the safety of non-target organisms. This study presents a metabarcoding analysis of biofilm-associated marine bacteria (16S-rRNA-gene) and fungi (ITS-region), with the aim to understand invertebrate settlement over time on hard substrates exposed to natural condition (Control) and two treatments (Antimicrobials and Antifouling Painted). Biofouling composition changed with exposure time (up to 12 days) and showed differences among Control and Antimicrobials and Painted treatments. Antimicrobial treatment influenced more the biofouling composition than traditional antifouling paint (Cu2O-based). Both treatments caused microbial resistance. Macrofouling establishment was strongly influenced by Gram-negative heterotrophic bacteria (mostly Proteobacteria and Bacteroidetes). Nevertheless, each macrofouling taxon settled in response to a specific biofilm bacterial composition, although other factors can also affect the biofouling community as the condition of the substrate. We suggest that proper friendly antifouling technologies should be focused on inhibiting bacterial biofilm adhesion.
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Affiliation(s)
- Vanessa Ochi Agostini
- Laboratório de Microcontaminantes Orgânicos e Ecotoxicologia Aquática - Instituto de Oceanografia da Universidade Federal do Rio Grande (FURG). Caixa Postal, 474, CEP: 96203-900, Rio Grande, RS, Brazil; Post-Doctoral fellow - Programa Nacional de Pós-Doutorado da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (PNPD-CAPES), Programa de Pós-graduação em Oceanologia (PPGO), Brazil.
| | - Erik Muxagata
- Laboratório de Zooplâncton - Instituto de Oceanografia da Universidade Federal do Rio Grande (FURG). Av. Itália, Km 8, Caixa Postal, 474, 96203-900, Rio Grande, RS, Brazil.
| | - Grasiela Lopes Leães Pinho
- Laboratório de Microcontaminantes Orgânicos e Ecotoxicologia Aquática - Instituto de Oceanografia da Universidade Federal do Rio Grande (FURG). Caixa Postal, 474, CEP: 96203-900, Rio Grande, RS, Brazil.
| | - Igor Stelmach Pessi
- Department of Microbiology, University of Helsinki, Viikinkaari 9, 00014, Helsinki, Finland; Helsinki Institute of Sustainability Science, University of Helsinki, Yliopistonkatu 3, 00014, Helsinki, Finland.
| | - Alexandre José Macedo
- Laboratório de Biofilmes e Diversidade Microbiana - Faculdade de Farmácia e Centro de Biotecnologia da Universidade Federal do Rio Grande do Sul (UFRGS), Av. Ipiranga, 2752, Bairro Azenha, 90610-000, Porto Alegre, RS, Brazil.
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11
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Song P, Xiao Y, Ren ZJ, Brooks JP, Lu L, Zhou B, Zhou Y, Freguia S, Liu Z, Zhang N, Li Y. Electrochemical biofilm control by reconstructing microbial community in agricultural water distribution systems. JOURNAL OF HAZARDOUS MATERIALS 2021; 403:123616. [PMID: 32781280 DOI: 10.1016/j.jhazmat.2020.123616] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 07/10/2020] [Accepted: 07/26/2020] [Indexed: 05/14/2023]
Abstract
Biofilm causes considerable technical challenges in agricultural water distribution systems. Electrochemical treatment (ECT) is a potential technique for controlling biofilm in the systems. Given the limited information on how ECT performance changes of irrigation systems and microbial biofilm community shifts. In this study, the effect of anti-biofilm was assessed. Illumina Miseq high-throughput sequencing, combined with molecular ecological network analysis, were applied to detect the effects of ECT on attached biofilm microbial communities. We found that ECT effectively mitigated biofilm formation with the fixed-biofilm biomass reduced by 37.5 %-79.9 %. ECT significantly shifted the bacterial community structures in the biofilm, reduced the communities' diversity, and changed the dominant species. Molecular ecological network analysis showed that the complexity and size of bacterial networks were destabilized under ECT and decreased the interactions among bacterial species. The reconstruction in bacterial community and networks were responsible for the decline in extracellular polymer substances and biofilm biomass. However, chlorine-resistant bacteria were found increased after ECT, and higher relative abundance and low biofilm removal was identified in continuous ECT as compared with intermittent ECT. These results aimed to highlight the opportunity for biofouling mitigation by ECT for irrigation systems, and reveal the potential anti-biofilm microbial mechanisms of ECT.
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Affiliation(s)
- Peng Song
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
| | - Yang Xiao
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
| | - Zhiyong Jason Ren
- Department of Civil and Environmental Engineering and Andlinger Center for Energy and the Environment, Princeton University, Princeton, NJ, 08544, United States
| | - John P Brooks
- Genetics and Sustainable Agricultural Research Unit, United States Department of Agriculture, Starkville, MS 39762, USA
| | - Lu Lu
- Department of Civil and Environmental Engineering and Andlinger Center for Energy and the Environment, Princeton University, Princeton, NJ, 08544, United States
| | - Bo Zhou
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
| | - Yunpeng Zhou
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
| | - Stefano Freguia
- Advanced Water Management Centre, University of Queensland, Brisbane, QLD 4072, Australia
| | - Zhidan Liu
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
| | - Ning Zhang
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
| | - Yunkai Li
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China.
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12
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Xiao Y, Liu Y, Ma C, Muhammad T, Zhou B, Zhou Y, Song P, Li Y. Using electromagnetic fields to inhibit biofouling and scaling in biogas slurry drip irrigation emitters. JOURNAL OF HAZARDOUS MATERIALS 2021; 401:123265. [PMID: 32629347 DOI: 10.1016/j.jhazmat.2020.123265] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 06/18/2020] [Accepted: 06/18/2020] [Indexed: 06/11/2023]
Abstract
Reusing biogas slurry (BS) in agricultural drip irrigation systems may provide a solution to deal with the adverse environmental impacts of applying BS. Biofouling and scaling are two leading issues in drip irrigation emitters. This study investigated a practice that applied electromagnetic fields (EMFs) to control biofilms and scales. The bacterial communities and mineral precipitations in the clogging substances of emitters were determined. Results showed that EMFs inhibited the growth of microbes, and influenced BS physicochemical parameters. Consequently, EMFs shifted the bacterial communities with reduced diversities. Network analyses revealed that bacterial species under EMFs treatments showed lower average connectivities and simpler interactions, which were responsible for the decreases of extracellular polymers substances (EPS). Moreover, EMFs treatments not only reduced the carbonates in emitters, but also prevented the depositions of phosphates, silicates, and quartzes. EMFs also had impacts on the lattice parameters and crystal volumes of carbonates. In addition, the changes in bacterial communities and EPS contents were associated with the reductions of various minerals. Accordingly, EMFs effectively mitigated biofilms and scales with the fixed clogging substances reduced by 29.1-53.8 %. These findings demonstrated that applying EMFs is an effective anti-biofouling and anti-scaling treatment with potential applications in BS irrigation systems.
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Affiliation(s)
- Yang Xiao
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
| | - Yaoze Liu
- Department of Environmental and Sustainable Engineering, University at Albany, State University of New York, Albany, NY 12222, USA
| | - Changjian Ma
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
| | - Tahir Muhammad
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
| | - Bo Zhou
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
| | - Yunpeng Zhou
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
| | - Peng Song
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
| | - Yunkai Li
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China.
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13
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Lequette K, Ait-Mouheb N, Wéry N. Hydrodynamic effect on biofouling of milli-labyrinth channel and bacterial communities in drip irrigation systems fed with reclaimed wastewater. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 738:139778. [PMID: 32531594 DOI: 10.1016/j.scitotenv.2020.139778] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 05/04/2020] [Accepted: 05/26/2020] [Indexed: 06/11/2023]
Abstract
The clogging of drippers due to the development of biofilms reduces the benefits and is an obstacle to the implementation of drip irrigation technology in a reclaimed water context. The narrow section and labyrinth geometry of the dripper channel results the development of a heterogeneous flow behaviours with the vortex zones which it enhance the fouling mechanisms. The objective of this study was to analyse the influence of the three dripper types, defined by their geometric and hydraulic parameters, fed with reclaimed wastewater, on the biofouling kinetics and the bacterial communities. Using optical coherence tomography, we demonstrated that the inlet of the drippers (mainly the first baffle) and vortex zones are the most sensitive area for biofouling. Drippers with the lowest Reynolds number and average cross-section velocity v (1 l·h-1) were the most sensible to biofouling, even if detachment events seemed more frequent in this dripper type. Therefore, dripper flow path with larger v should be consider to improve the anti-clogging performance. In addition, the dripper type and the geometry of the flow path influenced the structure of the bacterial communities from dripper biofilms. Relative abundancy of filamentous bacteria belonging to Chloroflexi phylum was higher in 1 l·h-1 drippers, which presented a higher level of biofouling. However, further research on the role of this phylum in dripper biofouling is required.
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Affiliation(s)
- Kévin Lequette
- INRAE, University of Montpellier, LBE, 102, Avenue des Etangs, 11100 Narbonne, France; INRAE, University of Montpellier, UMR G-Eau Avenue Jean-François Breton, 34000 Montpellier, France.
| | - Nassim Ait-Mouheb
- INRAE, University of Montpellier, UMR G-Eau Avenue Jean-François Breton, 34000 Montpellier, France
| | - Nathalie Wéry
- INRAE, University of Montpellier, LBE, 102, Avenue des Etangs, 11100 Narbonne, France
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