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Liu Z, Zhang C, Ma J, Peng Q, Du X, Sun S, Cheng J, Peng W, Chen L, Gu Z, Zhang W, Su P, Zhang D. Extraction Methods Determine the Quality of Soil Microbiota Acquisition. Microorganisms 2024; 12:403. [PMID: 38399807 PMCID: PMC10891820 DOI: 10.3390/microorganisms12020403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 02/07/2024] [Accepted: 02/08/2024] [Indexed: 02/25/2024] Open
Abstract
The soil microbiome plays a key role in plant health. Native soil microbiome inoculation, metagenomic profiling, and high-throughput cultivation require efficient microbe extraction. Sonication and oscillation are the most common methods used to extract soil microbiomes. However, the extraction efficiency of these methods has not been investigated in full. In this study, we compared the culturable microbe numbers, community structures, and alpha diversities among the different methods, including sonication, oscillation, and centrifugation, and their processing times. The study results showed that sonication significantly increases the culturable colony number compared with oscillation and centrifugation. Furthermore, the sonication strategy was found to be the main factor influencing extraction efficiency, but increased sonication time can aid in recovery from this impact. Finally, the extraction processing times were found to have a significant negative relationship with α-diversity among the extracted microbiota. In conclusion, sonication is the main factor for enriching in situ microbiota, and increased extraction time significantly decreases the α-diversity of the extracted microbiota. The results of this study provide insights into the isolation and utilization of different microorganism sources.
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Affiliation(s)
- Zhuoxin Liu
- Longping Branch, College of Biology, Hunan University, Changsha 410082, China
- State Key Laboratory of Hybrid Rice, Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Chi Zhang
- Longping Branch, College of Biology, Hunan University, Changsha 410082, China
- State Key Laboratory of Hybrid Rice, Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Jiejia Ma
- Longping Branch, College of Biology, Hunan University, Changsha 410082, China
- State Key Laboratory of Hybrid Rice, Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Qianze Peng
- State Key Laboratory of Hybrid Rice, Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125, China
- College of Tropical Crops, Hainan University, Haikou 570228, China
- National Center of Technology Innovation for Saline-Alkali Tolerant Rice in Sanya City, Sanya 572024, China
| | - Xiaohua Du
- State Key Laboratory of Hybrid Rice, Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Shu'e Sun
- State Key Laboratory of Hybrid Rice, Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Ju'e Cheng
- State Key Laboratory of Hybrid Rice, Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Weiye Peng
- State Key Laboratory of Hybrid Rice, Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Lijie Chen
- Longping Branch, College of Biology, Hunan University, Changsha 410082, China
- State Key Laboratory of Hybrid Rice, Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Zepei Gu
- State Key Laboratory of Hybrid Rice, Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Weixing Zhang
- State Key Laboratory of Hybrid Rice, Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Pin Su
- Longping Branch, College of Biology, Hunan University, Changsha 410082, China
- State Key Laboratory of Hybrid Rice, Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125, China
- National Center of Technology Innovation for Saline-Alkali Tolerant Rice in Sanya City, Sanya 572024, China
| | - Deyong Zhang
- Longping Branch, College of Biology, Hunan University, Changsha 410082, China
- State Key Laboratory of Hybrid Rice, Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125, China
- College of Tropical Crops, Hainan University, Haikou 570228, China
- National Center of Technology Innovation for Saline-Alkali Tolerant Rice in Sanya City, Sanya 572024, China
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Rendón-Huerta JA, Rodríguez-Gallegos A, Morales-Rueda JÁ, García-López JC, Álvarez-Fuentes G, Negrete-Sánchez LO, Lee-Rangel HA. Natural rennet sterilisation by non-thermic methods for fresh cheese manufacture. Italian Journal of Animal Science 2023. [DOI: 10.1080/1828051x.2023.2188884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/22/2023]
Affiliation(s)
- Juan Antonio Rendón-Huerta
- Coordinación Académica Región Altiplano Oeste, Universidad Autónoma de San Luis Potosí, San Luis Potosí, México
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Spiteri D, Griffin S, Karatzas KA, Scerri C, Valdramidis VP. Escherichia coli K-12 Transcriptomics for Assessing the Mechanism of Action of High-Power Ultrasound. Microorganisms 2023; 11:2768. [PMID: 38004779 PMCID: PMC10673019 DOI: 10.3390/microorganisms11112768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 10/22/2023] [Accepted: 10/27/2023] [Indexed: 11/26/2023] Open
Abstract
An investigation into the mechanisms of action on bacteria involving exposure to stress factors was conducted in this study. The effects of ultrasound on Escherichia coli K-12 MG1655 and its isogenic mutant, ∆gadW, under high power ultrasound treatments (26 kHz) were screened and identified by analysing their transcriptome differences between primary and secondary sequential treatments using RNA-Seq. This also helped to assess any developed protection for cells between different generations. According to our results, 1825 genes of all tested conditions were expressed, playing different roles in the cell. The expression of these genes is associated with DNA damage, cell membrane integrity, and also metabolic effects. The studied strains also showed different differential expressed genes (DEGs), with some genes being directly responsible for defence mechanisms, while others play an indirect effect due to cell damage. A gradual decrease in the expression of the genes, as we moved from just one cycle of ultrasound treatment to sequential treatment, was evident from a heat map analysis of the results. Overall, E. coli K-12 builds a self-protection mechanism by increasing the expression of genes involved in the respiration for increased growth, and production of flagellum and pili. It can be concluded that high power ultrasound is a technology that triggers several different defence mechanisms which directly link to E. coli.
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Affiliation(s)
- David Spiteri
- Department of Food Science and Nutrition, University of Malta, MSD 2080 Msida, Malta; (D.S.); (S.G.)
- Centre for Molecular Medicine and Biobanking, University of Malta, MSD 2080 Msida, Malta;
| | - Sholeem Griffin
- Department of Food Science and Nutrition, University of Malta, MSD 2080 Msida, Malta; (D.S.); (S.G.)
- Centre for Molecular Medicine and Biobanking, University of Malta, MSD 2080 Msida, Malta;
| | | | - Christian Scerri
- Centre for Molecular Medicine and Biobanking, University of Malta, MSD 2080 Msida, Malta;
- Department of Physiology and Biochemistry, University of Malta, MSD 2080 Msida, Malta
| | - Vasilis P. Valdramidis
- Department of Food Science and Nutrition, University of Malta, MSD 2080 Msida, Malta; (D.S.); (S.G.)
- Department of Chemistry, National and Kapodistrian University of Athens, 34400 Psachna, Greece
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Farsad S, Ben Hamou A, Chaoui A, Amjlef A, Lhanafi S, Et-Taleb S, El Alem N. Maximizing bio-methane potential from municipal landfill leachate through ultrasonic pretreatment. Heliyon 2023; 9:e21347. [PMID: 37908711 PMCID: PMC10613918 DOI: 10.1016/j.heliyon.2023.e21347] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 10/07/2023] [Accepted: 10/19/2023] [Indexed: 11/02/2023] Open
Abstract
In the quest for sustainable waste management solutions, this study explores the integration of ultrasonic pretreatment as a preparatory step for the anaerobic digestion of landfill leachate. Employing response surface methodology (RSM) coupled with central composite design (CCD), we systematically optimize the process parameters, including pH, inoculum volume, and ultrasonic pretreatment duration, to maximize the yield of bio-methane potential (ml CH4/g VS). The results demonstrate the effective application of RSM-CCD for predicting and modelling methane generation, with a highly significant model (R2 = 0.899). The optimized conditions reveal a remarkable biomethane potential of 177 ml CH4/g VS. Additionally, this study contributes to the understanding of the positive effect of ultrasound pretreatment on the anaerobic digestion of landfill leachate, and the quality of the digestate obtained after anaerobic digestion was studied and different valorisations were proposed.
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Affiliation(s)
- Salaheddine Farsad
- Laboratory of Materials and Environment, Ibn Zohr University, Agadir, 80000, Morocco
| | - Aboubakr Ben Hamou
- Laboratory of Materials and Environment, Ibn Zohr University, Agadir, 80000, Morocco
| | - Ayoub Chaoui
- Laboratory of Materials and Environment, Ibn Zohr University, Agadir, 80000, Morocco
| | - Asma Amjlef
- Laboratory of Materials and Environment, Ibn Zohr University, Agadir, 80000, Morocco
| | - Saaida Lhanafi
- Laboratory of Materials and Environment, Ibn Zohr University, Agadir, 80000, Morocco
| | - Said Et-Taleb
- Laboratory of Materials and Environment, Ibn Zohr University, Agadir, 80000, Morocco
| | - Noureddine El Alem
- Laboratory of Materials and Environment, Ibn Zohr University, Agadir, 80000, Morocco
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Foster L, Boothman C, Harrison S, Jenkinson P, Pittman JK, Lloyd JR. Identification of algal rich microbial blooms in the Sellafield Pile Fuel Storage Pond and the application of ultrasonic treatment to control the formation of blooms. Front Microbiol 2023; 14:1261801. [PMID: 37860139 PMCID: PMC10582928 DOI: 10.3389/fmicb.2023.1261801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 09/19/2023] [Indexed: 10/21/2023] Open
Abstract
The presence of microorganisms in a range of nuclear facilities has been known for many years. In this study the microbial community inhabiting the Pile Fuel Storage Pond (PFSP), which is a legacy open-aired facility on the Sellafield nuclear site, Cumbria, UK, was determined to help target microbial bloom management strategies in this facility. The PFSP is currently undergoing decommissioning and the development of prolonged dense microbial blooms reduces the visibility within the water. Such impairment in the pond water visibility can lead to delays in pond operations, which also has financial implications. Efforts to control the microbial population within the PFSP are ongoing, with the installation of ultrasonic treatment units. Here next generation sequencing techniques focussing on broad targets for both eukaryotic and prokaryotic organisms were used to identify the microbial community. On-site monitoring of photosynthetic pigments indicated when microbial blooms formed and that eukaryotic algae were most likely to be responsible for these events. The sequencing data suggested that the blooms were dominated by members of the class Chrysophyceae, a group of golden algae, while evidence of cyanobacteria and other photosynthetic bacteria was limited, further supporting eukaryotic organisms causing the blooms. The results of sequencing data from 2018 was used to inform a change in the operational settings of the ultrasonic units, while monitoring of the microbial community and photosynthetic pigments trends was extended. Since the changes were made to the ultrasonic treatment, the visibility in the pond was significantly improved, with an absence of a spring bloom in 2020 and an overall reduction in the number of days lost due to microbial blooms annually. This work extends our knowledge of the diversity of microbes able to colonise nuclear fuel storage ponds, and also suggests that sequencing data can help to optimise the performance of ultrasonic treatments, to control algal proliferation in the PFSP facility and other inhospitable engineered systems.
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Affiliation(s)
- Lynn Foster
- Research Centre for Radwaste Disposal and Williamson Research Centre for Molecular Environmental Science, Department of Earth and Environmental Sciences, The University of Manchester, Manchester, United Kingdom
| | - Christopher Boothman
- Research Centre for Radwaste Disposal and Williamson Research Centre for Molecular Environmental Science, Department of Earth and Environmental Sciences, The University of Manchester, Manchester, United Kingdom
| | - Scott Harrison
- National Nuclear Laboratory, Central Laboratory, Sellafield, Seascale, United Kingdom
| | | | - Jon K. Pittman
- Research Centre for Radwaste Disposal and Williamson Research Centre for Molecular Environmental Science, Department of Earth and Environmental Sciences, The University of Manchester, Manchester, United Kingdom
| | - Jonathan R. Lloyd
- Research Centre for Radwaste Disposal and Williamson Research Centre for Molecular Environmental Science, Department of Earth and Environmental Sciences, The University of Manchester, Manchester, United Kingdom
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Bao J, Guo S, Fan D, Cheng J, Zhang Y, Pang X. Sonoactivated Nanomaterials: A potent armament for wastewater treatment. Ultrason Sonochem 2023; 99:106569. [PMID: 37657369 PMCID: PMC10495678 DOI: 10.1016/j.ultsonch.2023.106569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 08/22/2023] [Accepted: 08/24/2023] [Indexed: 09/03/2023]
Abstract
The world is currently facing a critical issue of water pollution, with wastewater being a major contributor. It comes from different types of pollutants, including industrial, medical, agricultural, and domestic. Effective treatment of wastewater requires efficient degradation of pollutants and carcinogens prior to discharge. Commonly used methods for wastewater treatment include filtration, adsorption, biodegradation, advanced oxidation processes, and Fenton oxidation, among others.The sonochemical effect refers to the decomposition, oxidation, reduction, and other reactions of pollutant molecules in wastewater upon ultrasound activation, achieving pollutants removal. Furthermore, the micro-flow effect generated by ultrasonic waves creates tiny bubbles and eddies. This significantly increases the contact area and exchange speed of pollutants and dissolved oxygen, thereby accelerating pollutant degradation. Currently, ultrasonic-assisted technology has emerged as a promising approach due to its strong oxidation ability, simple and cheap equipments, and minimal secondary pollution. However, the use of ultrasound in wastewater treatment has some limitations, such as high energy consumption, lengthy treatment time, limited water treatment capacity, stringent water quality requirements, and unstable treatment effects. To address these issues, the combination of enhanced ultrasound with nanotechnology is proposed and has shown great potential in wastewater treatment. Such a combination can greatly improve the efficiency of ultrasonic oxidation, resulting in an improved performance of wastewater purification. This article presents recent progress in the development of sonoactivated nanomaterials for enhanced wastewater disposal. Such nanomaterials are systematically classified and discussed. Potential challenges and future prospects of this emerging technology are also highlighted.
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Affiliation(s)
- Jianfeng Bao
- Functional Magnetic Resonance and Molecular Imaging Key Laboratory of Henan Province, Department of Magnetic Resonance Imaging, the First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou 450000, China
| | - Shuangshaung Guo
- School of Basic Medical Sciences, Academy of Medical Sciences, Henan Institute of Medical and Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Dandan Fan
- School of Basic Medical Sciences, Academy of Medical Sciences, Henan Institute of Medical and Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Jingliang Cheng
- Functional Magnetic Resonance and Molecular Imaging Key Laboratory of Henan Province, Department of Magnetic Resonance Imaging, the First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou 450000, China
| | - Yong Zhang
- Functional Magnetic Resonance and Molecular Imaging Key Laboratory of Henan Province, Department of Magnetic Resonance Imaging, the First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou 450000, China
| | - Xin Pang
- Functional Magnetic Resonance and Molecular Imaging Key Laboratory of Henan Province, Department of Magnetic Resonance Imaging, the First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou 450000, China.
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Chu X, Feng S, Zhou W, Xu S, Zeng X. Cleaning efficacy of EDDY versus ultrasonically-activated irrigation in root canals: a systematic review and meta-analysis. BMC Oral Health 2023; 23:155. [PMID: 36932445 PMCID: PMC10024384 DOI: 10.1186/s12903-023-02875-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 03/13/2023] [Indexed: 03/19/2023] Open
Abstract
BACKGROUND Ultrasonically-activated irrigation (UAI) is effective in root canal irrigation but may damage canal walls. EDDY is a sonic activation system with flexible working tips that cause no harm to dentinal walls. This review explores the intracanal cleaning efficacy of EDDY compared with UAI in vitro. METHODS The systematic review was registered in the PROSPERO database (CRD42021235826). A literature search was conducted in six electronic databases. In vitro studies that compared the removal of smear layer, debris, soft tissue or microbes in root canals between EDDY and UAI were included. Data extraction and quality assessment were performed. Meta-analyses were conducted on smear layer removal and debris elimination with the standardized mean difference (SMD). Heterogeneity was measured using the I2 test and the Chi2 test. The random-effect model was used when I2 > 50%, or p < 0.1, otherwise the fixed-effect model was applied. The level of significance was set at p < 0.05. RESULTS 19 articles were included in this systematic review and 7 articles were included in meta-analyses. Meta-analyses on smear layer removal showed unimportant differences between EDDY and UAI at any canal third (coronal [SMD = 0.08, 95% confidence interval (95%CI): -0.29 to 0.45; p = 0.44, I2 = 0%]; middle [SMD = 0.02, 95% CI: -0.44 to 0.47; p = 0.94, I2 = 0%]; apical [SMD = 0.01, 95%CI: -0.35 to 0.38; p = 0.70, I2 = 0%]). Meta-analyses on debris removal evaluated by scanning electron microscope (coronal [SMD = 0.03, 95% CI: -0.41 to 0.46; p = 0.27, I2 = 23%]; middle [SMD = -0.24, 95% CI: -0.83 to 0.35; p = 0.80, I2 = 0%]; apical [SMD = 0.24, 95%CI: -0.20 to 0.67; p = 0.36, I2 = 2%]) and micro-CT (SMD = 0.36, 95% CI: -0.67 to 1.40; p = 0.03, I2 = 70%) both found insignificant differences. No meta-analysis was undertaken on soft-tissue removal and disinfection due to the various study designs, but the qualitative analyses implied that EDDY achieved similar performance to UAI in both aspects. CONCLUSIONS Limited evidence indicated that EDDY was comparable to UAI in removing smear layer, debris, soft tissue and microbes ex vivo. Considering UAI may damage canal walls, EDDY might be a substitute for UAI in irrigation activation. But more randomized clinical trials are required to explore the clinical extrapolation of the results in this review.
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Affiliation(s)
- Xiaojun Chu
- Department of Endodontics, Stomatological Hospital, School of Stomatology, Southern Medical University, No 366 Jiangnan Avenue South, Guangzhou, 510280, Guangdong, China
| | - Shuting Feng
- Department of Endodontics, Stomatological Hospital, School of Stomatology, Southern Medical University, No 366 Jiangnan Avenue South, Guangzhou, 510280, Guangdong, China
| | - Weiqing Zhou
- Department of Endodontics, Stomatological Hospital, School of Stomatology, Southern Medical University, No 366 Jiangnan Avenue South, Guangzhou, 510280, Guangdong, China
| | - Shuaimei Xu
- Department of Endodontics, Stomatological Hospital, School of Stomatology, Southern Medical University, No 366 Jiangnan Avenue South, Guangzhou, 510280, Guangdong, China
| | - Xiongqun Zeng
- Department of Endodontics, Stomatological Hospital, School of Stomatology, Southern Medical University, No 366 Jiangnan Avenue South, Guangzhou, 510280, Guangdong, China.
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Kernou O, Belbahi A, Sahraoui Y, Bedjaoui K, Kerdouche K, Amir A, Dahmoune F, Madani K, Rijo P. Effect of Sonication on Microwave Inactivation Kinetics of Enterococcus faecalis in Dairy Effluent. Molecules 2022; 27:7422. [DOI: 10.3390/molecules27217422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 10/20/2022] [Accepted: 10/24/2022] [Indexed: 11/06/2022] Open
Abstract
The aim of this study is to inactivate Enterococcus faecalis ATCC 29212 present in dairy wastewater effluent using microwave (MW) waves and/or ultrasound waves (US). The ultrasonic bath treatment (35 kHz) had no significant effect on the reduction of the survival rate (predominant declumping effect). At 650 W of microwave treatment, the total destruction was completed at 75 s, while at 350 W a 3 log reduction was achieved. The Weibull model was fitted to the survival curves to describe the inactivation kinetics, and the effect of the combined microwave-ultrasound treatments was evaluated. The scaling parameter α that was estimated from the inactivation kinetics for the microwaves combined with the ultrasound waves in pre-treatment was found to be lower than the scaling parameters obtained in post-treatment, which were in turn lower than those estimated for microwaves or ultrasound waves alone. The use of the ultrasound waves in pre-treatment was more effective than in post-treatment; a total reduction was achieved using a combination of US (30 min) followed by MW (650 W) with α = 28.3 s, while 4.0 log was obtained by reversing all processes with α = 34.5 s. The results from the protein assays indicate that the bacterial wall was damaged and that holes were formed from which protein leakage occurred.
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Barton F, Shaw S, Morris K, Graham J, Lloyd JR. Impact and control of fouling in radioactive environments. Progress in Nuclear Energy 2022. [DOI: 10.1016/j.pnucene.2022.104215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Huang Y, Li L, Luan X, Wei X, Li H, Gao N, Yao J. Ultrasound-enhanced coagulation for cyanobacterial removal: Effects of ultrasound frequency and energy density on coagulation performance, leakage of intracellular organic matters and toxicity. Water Res 2021; 201:117348. [PMID: 34167011 DOI: 10.1016/j.watres.2021.117348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 06/06/2021] [Accepted: 06/07/2021] [Indexed: 06/13/2023]
Abstract
Ultrasound-enhanced coagulation is capable of effectively removing algal cells in algae-laden water. However, study differences in ultrasound settings, algal cell conditions and coagulant properties complicate the accurate evaluation of this technique for practical applications. No study has yet compared algae (and algal organic matters) removal among different frequencies of ultrasound in the ultrasound-coagulation process. In this study, the ultrasound at three typical frequencies, 29.4, 470 and 780 kHz, were applied for this purpose. The results showed that high-frequency ultrasound at 470 and 780 kHz had substantially greater improvement of coagulation than low-frequency ultrasound at 29.4 kHz (For example, the turbidity removal at 1 mg-Al/L of polymeric aluminum chloride increased by 204.2%, 571.9% and 563.2% under 29.4, 470 and 780 kHz ultrasound-coagulation, respectively, at 3.42 J/mL). Algal cells exhibited irreversible physical damage and the release of intracellular organic matters (such as odorous compounds) under low-frequency ultrasound with energy densities ≥ 3.42 J/mL, whereas high-frequency ultrasound was characterized by nonviolent impairment, including oxidative degradation and gas vacuole destruction (particularly reversible) resulting from ultrasound-induced radicals and cell resonance, respectively. Avoiding the severe destruction of algal cells is crucial for minimizing the toxicity and secondary pollution of the treated water. To achieve satisfactory removal, protected safety and better economy, the optimal energy density for each frequency was also determined. The findings from the analyses of the laboratory-cultured sample were confirmed via real eutrophic surface water. This study provides new insights and guidance for the ongoing study of harmful algal removal by ultrasound-enhanced coagulation.
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Affiliation(s)
- Yangrui Huang
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China
| | - Lei Li
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China.
| | - Xinmiao Luan
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China
| | - Xinmin Wei
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Huaizheng Li
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
| | - Naiyun Gao
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China
| | - Juanjuan Yao
- Key Laboratory of the Three Gorges Reservoir Regions Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
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Chuenchart W, Karki R, Shitanaka T, Marcelino KR, Lu H, Khanal SK. Nanobubble technology in anaerobic digestion: A review. Bioresour Technol 2021; 329:124916. [PMID: 33730622 DOI: 10.1016/j.biortech.2021.124916] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/22/2021] [Accepted: 02/24/2021] [Indexed: 06/12/2023]
Abstract
Nanobubble technology has significant potential to improve the anaerobic digestion (AD) process by ameliorating the rate-limiting steps of hydrolysis and methanogenesis, as well as providing process stability by reducing sulfide and volatile fatty acid (VFA) levels. Nanobubbles (NB) can enhance substrate accessibility, digestibility, and enzymatic activity due to their minuscule size, high electrostatic interaction, and ability to generate reactive oxygen species. Air- and O2-NB can create a microaerobic environment for higher efficiency of the electron transport system, thereby reducing VFAs through enhanced facultative bacterial activity. Additionally, H2- and CO2-NB can improve hydrogenotrophic methanogenesis. Recently, several studies have employed NB technology in the AD process. There is, however, a lack of concise, synthesized information on NB applications to the AD process. This review provides an in-depth discussion on the NB-integrated AD process and the putative mechanisms involved. General discussions on other potential applications and future research directions are also provided.
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Affiliation(s)
- Wachiranon Chuenchart
- Department of Civil and Environmental Engineering, University of Hawai'i at Mānoa, 2540 Dole Street, Honolulu, HI 96822, United States
| | - Renisha Karki
- Department of Molecular Biosciences and Bioengineering, University of Hawai'i at Mānoa, 1955 East-West Road, Honolulu, HI 96822, United States
| | - Ty Shitanaka
- Department of Molecular Biosciences and Bioengineering, University of Hawai'i at Mānoa, 1955 East-West Road, Honolulu, HI 96822, United States
| | - Kyle Rafael Marcelino
- Department of Civil and Environmental Engineering, University of Hawai'i at Mānoa, 2540 Dole Street, Honolulu, HI 96822, United States
| | - Hui Lu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, China
| | - Samir Kumar Khanal
- Department of Civil and Environmental Engineering, University of Hawai'i at Mānoa, 2540 Dole Street, Honolulu, HI 96822, United States; Department of Molecular Biosciences and Bioengineering, University of Hawai'i at Mānoa, 1955 East-West Road, Honolulu, HI 96822, United States.
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Proner MC, de Meneses AC, Veiga AA, Schlüter H, Oliveira DD, Luccio MD. Industrial Cooling Systems and Antibiofouling Strategies: A Comprehensive Review. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c05985] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mariane Carolina Proner
- Department of Chemical and Food Engineering, Federal University of Santa Catarina (UFSC), Florianópolis, Santa Catarina 88040-900, Brazil
| | - Alessandra Cristina de Meneses
- Department of Chemical and Food Engineering, Federal University of Santa Catarina (UFSC), Florianópolis, Santa Catarina 88040-900, Brazil
| | - Andrea Azevedo Veiga
- Petrobras R&D Center, CENPES, Av. Horácio Macedo, 950, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, Rio de Janeiro 21941-915, Brazil
| | - Helga Schlüter
- Petrobras R&D Center, CENPES, Av. Horácio Macedo, 950, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, Rio de Janeiro 21941-915, Brazil
| | - Débora de Oliveira
- Department of Chemical and Food Engineering, Federal University of Santa Catarina (UFSC), Florianópolis, Santa Catarina 88040-900, Brazil
| | - Marco Di Luccio
- Department of Chemical and Food Engineering, Federal University of Santa Catarina (UFSC), Florianópolis, Santa Catarina 88040-900, Brazil
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13
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Zhang H, Tsai S, Tikekar RV. Inactivation of Listeria innocua on blueberries by novel ultrasound washing processes and their impact on quality during storage. Food Control 2021; 121:107580. [DOI: 10.1016/j.foodcont.2020.107580] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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14
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Rahman APH, Dash S, Mohanty PS, Mishra A, Lundborg CS, Tripathy SK. Sonophotocatalytic disinfection of Shigella species under visible light irradiation: Insights into its molecular mechanism, antibacterial resistance and biofilm formation. Environ Res 2020; 187:109620. [PMID: 32416355 DOI: 10.1016/j.envres.2020.109620] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 04/25/2020] [Accepted: 04/30/2020] [Indexed: 06/11/2023]
Abstract
Microbial contamination of water is one of the major sources of many diseases worldwide. Evolution of antibacterial resistance (ABR) alongside the caveats in most of the water treatment methods causes the severity of the current problem extremely vexing. This calls for an urgent need to develop new treatment methods aiming to reduce the microbial as well as ABR load in the environment. Herein, we successfully developed a visible light assisted sonophotocatalysis (SPC) using Fe/ZnO nanoparticles (NPs) for the disinfection of Shigella dysenteriae. A consortia containing S. dysenteriae and S. flexineri was also completely disinfected using SPC. Growth conditions of S. dysenteriae like growth phases and growth temperaturehad different outcomes on the overall efficacy of SPC. Compared with catalysts such as ZnO and TiO2, Fe/ZnO resulted in better disinfection. Multi-ROS production, mostly containing h+ and O2· radicals, due to the electron displacement in the catalyst and acoustic cavitation was identified as the factors behind bacterial lethality. The ROS produced was found to interfere with the metabolic activities of S. dysenteriae by causing membrane perturbation. We identified DNA damage inside the cells and the subsequent release of intracellular components. The compositional changes in the fatty acid makeup of the cells were altered as a result of SPC and few fatty acid markers indicating the stress posed by SPC were also identified. Loss of ABR in S. dysenteriae was also recorded post SPC treatment. Abatement in the biofilm forming ability of the injured bacterial cells was also recorded, proving the extremity of stress induced by SPC. Hence, the excellent efficacy of SPC in disinfecting bacteria is proposed for tertiary water treatment applications.
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Affiliation(s)
- A P Habeeb Rahman
- School of Chemical Technology, Kalinga Institute of Industrial Technology, Bhubaneswar, 751024, Odisha, India; School of Biotechnology, Kalinga Institute of Industrial Technology, Bhubaneswar, 751024, Odisha, India
| | - Swagatika Dash
- School of Biotechnology, Kalinga Institute of Industrial Technology, Bhubaneswar, 751024, Odisha, India
| | - Priti Sundar Mohanty
- School of Chemical Technology, Kalinga Institute of Industrial Technology, Bhubaneswar, 751024, Odisha, India
| | - Amrita Mishra
- School of Biotechnology, Kalinga Institute of Industrial Technology, Bhubaneswar, 751024, Odisha, India
| | | | - Suraj K Tripathy
- School of Chemical Technology, Kalinga Institute of Industrial Technology, Bhubaneswar, 751024, Odisha, India; School of Biotechnology, Kalinga Institute of Industrial Technology, Bhubaneswar, 751024, Odisha, India.
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15
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Sistanizadeh-Aghdam M, Abai MR, Shayeghi M, Mahvi AH, Raeisi A. Bio-efficacy of ultrasound exposure against immature stages of common house mosquitoes under laboratory conditions. Int J Radiat Biol 2020; 96:937-942. [PMID: 32228339 DOI: 10.1080/09553002.2020.1748909] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
Purpose: In southern Iran with a tropical climate, the above and underground cisterns of drinking water are the main habitats for immature stages of mosquitoes. The local people do not agree with using calcium hypochlorite granules in the water cisterns due to the change of water taste. Following the increased worldwide interest in using ultrasound technology for water disinfection, this study was conducted to assess the possible dual effects of ultrasound waves against immature mosquitoes.Materials and methods: Combinations of four power levels, two frequencies, three temperatures, and eight exposure times were applied to immature Culex pipiens. The exposure chamber of immature mosquitoes was the disposable cups placed inside a sonication bath containing tap water.Results: The mortality rate of immature mosquitos was 85-91% at 10-25 W, 30 °C and 130 kHz. The most effective ultrasound regimen for causing immature mortality included a fixed frequency of 130 kHz, a temperature of 30 °C, and a power level of 20-25 W. The lowest efficacy was observed in the egg stage. The median lethal time (LT50) and ninety percent lethal time (LT90) of sonication was 5.9 ± 0.6 min and 1.6 ± 0.1 min at 30 °C and a fixed frequency of 130 kHz.Conclusions: Evidence indicated effective ultrasound irradiation against immature mosquitoes in the water. This study provides a clear scientific basis for larvicidal properties induced by ultrasound emissions at laboratory conditions. The findings could be used for setting the ultrasound devices in the field investigations for achieving desired effectiveness.
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Affiliation(s)
- Mohammad Sistanizadeh-Aghdam
- Department of Medical Entomology and Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Abai
- Department of Medical Entomology and Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.,Department of Chemical Pollutants and Pesticides, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran
| | - Mansoureh Shayeghi
- Department of Medical Entomology and Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Amir Hossein Mahvi
- Department of Health Environmental Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Ahmad Raeisi
- Center for Communicable Diseases Control, Ministry of Health and Medical Education, Malaria Control Unit, Tehran, Iran
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16
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Li H, Li H, Han Q, Huang X, Jiang Y, Sun H, Li H. Influence of micro/nanobubbles on clogging in drip irrigation systems. RSC Adv 2020; 10:38912-38922. [PMID: 35518435 PMCID: PMC9057344 DOI: 10.1039/d0ra07782h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 11/20/2020] [Accepted: 10/12/2020] [Indexed: 11/21/2022] Open
Abstract
Drip emitter clogging is closely related to the presence of particulate matter, nutrients, organic matter and microorganisms in irrigation water and severely restricts the performance, service life and popularization of drip irrigation systems.
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Affiliation(s)
- Hao Li
- Research Center of Fluid Machinery Engineering and Technology
- Jiangsu University
- Zhenjiang
- China
- Institute of Farmland Irrigation
| | - Hong Li
- Research Center of Fluid Machinery Engineering and Technology
- Jiangsu University
- Zhenjiang
- China
| | - Qibiao Han
- Institute of Farmland Irrigation
- Chinese Academy of Agricultural Sciences
- Xinxiang
- China
| | - Xiuqiao Huang
- Institute of Farmland Irrigation
- Chinese Academy of Agricultural Sciences
- Xinxiang
- China
| | - Yue Jiang
- Research Center of Fluid Machinery Engineering and Technology
- Jiangsu University
- Zhenjiang
- China
| | - Hao Sun
- Institute of Farmland Irrigation
- Chinese Academy of Agricultural Sciences
- Xinxiang
- China
| | - Hui Li
- Institute of Farmland Irrigation
- Chinese Academy of Agricultural Sciences
- Xinxiang
- China
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17
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Matafonova G, Batoev V. Review on low- and high-frequency sonolytic, sonophotolytic and sonophotochemical processes for inactivating pathogenic microorganisms in aqueous media. Water Res 2019; 166:115085. [PMID: 31539667 DOI: 10.1016/j.watres.2019.115085] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 09/05/2019] [Accepted: 09/11/2019] [Indexed: 05/28/2023]
Abstract
Ultraviolet and ultrasound-based advanced oxidation processes (AOPs) are gaining considerable research attention for water treatment and disinfection. Compared to low-frequency ultrasound (LFUS, <100 kHz), high-frequency ultrasound (HFUS, >100 kHz and MHz range) for water disinfection remains much less investigated. The present review aims at surveying and discussing literature data on microbial inactivation in non-food aqueous media using HFUS alone and with AOPs. More specifically, the review covers sonophotolytic (US/UV) processes under sequential and simultaneous modes as well as sonophotochemical processes, where both low and high frequencies were applied. Addressing a state-of-the-art biomedical research, we have attempted to provide more insight into mechanical and sonochemical mechanisms of inactivation under ultrasonic exposure. Sonoporation, intracellular generation of reactive oxygen species (ROS), energy stimulation of aquaporins to deliver ROS, and injection of extracellular ROS into sonoporated cells have all been identified as primary ways of inactivation. Application of ultrasound in the 0.2-2 MHz range and mercury-free light sources to support the Minamata Convention on Mercury is an ongoing challenge for effective elimination of microbial pathogens from water and wastewater through sonophotolytic and sonophotochemical AOPs.
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Affiliation(s)
- Galina Matafonova
- Laboratory of Engineering Ecology, Baikal Institute of Nature Management, Siberian Branch of Russian Academy of Sciences, Ulan-Ude, Russia.
| | - Valeriy Batoev
- Laboratory of Engineering Ecology, Baikal Institute of Nature Management, Siberian Branch of Russian Academy of Sciences, Ulan-Ude, Russia
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18
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Jain P, Bhandari VM, Balapure K, Jena J, Ranade VV, Killedar DJ. Hydrodynamic cavitation using vortex diode: An efficient approach for elimination of pathogenic bacteria from water. J Environ Manage 2019; 242:210-219. [PMID: 31039530 DOI: 10.1016/j.jenvman.2019.04.057] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 02/15/2019] [Accepted: 04/16/2019] [Indexed: 05/07/2023]
Abstract
The present study successfully demonstrates greener methodology of hydrodynamic cavitation using rotational flows for disinfection of water. Disinfection of two model microbial strains-gram- negative (Escherichia coli) and gram-positive (Staphylococcus aureus) using vortex diode was evaluated. The removal efficacy was quantified for two different cavitation reactors. Practically complete elimination of E. coli was achieved (99%) after 1 h of cavitation at a pressure drop of only 0.5 bar. However, elimination of S. aureus using vortex diode was observed to be lower in comparison to the removal of E. coli and only 60% disinfection could be achieved under similar conditions, which can be subsequently enhanced up to 98% by increasing pressure drop. The results were compared with another cavitating device that employs linear flow for cavitation, orifice. The reactor geometry has significant impact on the disinfection process and orifice was found to require significantly higher pressure drop (10 bar) conditions for disinfection and for eliminating gram-positive bacteria with high efficiency. A plausible mechanism for disinfection was proposed to elucidate the role of cavitation in cell destruction leading to death of cells through the rupture of cell wall, oxidative damage and possible DNA denaturation. Also, a cavitation model using per pass disinfection was developed that can provide meaningful physical description of the disinfection process as against the conventional first order reaction rate model. This study would provide meaningful insight into cavitation process based on hydrodynamic cavitation for the destruction of both gram-negative and gram-positive bacteria from various water sources, including industrial wastewaters.
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Affiliation(s)
- Pooja Jain
- Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory, Pune, India; Civil Engineering and Applied Mechanics Department. Shri. G.S. Institute of Technology and Science, Indore, India
| | - Vinay M Bhandari
- Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory, Pune, India.
| | - Kshama Balapure
- Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory, Pune, India
| | - Jyotsnarani Jena
- Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory, Pune, India
| | - Vivek V Ranade
- School of Chemistry and Chemical Engineering, Queen's University Belfast, Northern Ireland, UK
| | - Deepak J Killedar
- Civil Engineering and Applied Mechanics Department. Shri. G.S. Institute of Technology and Science, Indore, India
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19
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Karami N, Mohammadi P, Zinatizadeh A, Falahi F, Aghamohammadi N. High rate treatment of hospital wastewater using activated sludge process induced by high-frequency ultrasound. Ultrason Sonochem 2018; 46:89-98. [PMID: 29739516 DOI: 10.1016/j.ultsonch.2018.04.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 04/03/2018] [Accepted: 04/18/2018] [Indexed: 06/08/2023]
Abstract
The biomass concentration of conventional activated sludge (CAS) process due to low sludge sedimentation in clarifiers is limited to 3000 mg/L. In this study, high-frequency ultrasound wave (1.8 MHz) was applied to enhance the CAS process performance using high Mixed Liquor Suspended Solid (MLSS) concentration. The study conducted using a pilot scale CAS bioreactor (with and without ultrasound) and their performance for treating a hospital wastewater were compared. Experimental conditions were designed based on a Central Composite Design (CCD). The sets of data analyzed, modeled and optimized using Response Surface Methodology (RSM). The effect of MLSS concentration 3000-8000 mg/L and hydraulic retention time (HRT) 2-8 h are considered as operating variables to investigate on process responses. The obtained results showed that high-frequency ultrasound was significantly decreased the sludge volume index (SVI) 50% and effluent turbidity about 88.5% at high MLSS. Also, observed that COD removal of both systems was nearly similar, as the maximum COD removal for sonicated and non-sonicated systems were 92 and 92.5% respectively. However, this study demonstrates that the ultrasound irradiation has not had any negative effect on the microbial activity.
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Affiliation(s)
- Nasim Karami
- Research Center for Environmental Determinants of Health, Department of Environmental Health Engineering, School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Parviz Mohammadi
- Research Center for Environmental Determinants of Health, Department of Environmental Health Engineering, School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran.
| | - Aliakbar Zinatizadeh
- Environmental Research Center (ERC), Department of Applied Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran
| | - Farzaneh Falahi
- Research Center for Environmental Determinants of Health, Department of Environmental Health Engineering, School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Nasrin Aghamohammadi
- Centre for Occupational and Environmental Health, Department of Social and Preventive Medicine, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
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20
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Spiteri D, Chot-Plassot C, Sclear J, Karatzas K, Scerri C, Valdramidis V. Ultrasound processing of liquid system(s) and its antimicrobial mechanism of action. Lett Appl Microbiol 2017; 65:313-318. [DOI: 10.1111/lam.12776] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 07/14/2017] [Accepted: 07/16/2017] [Indexed: 11/27/2022]
Affiliation(s)
- D. Spiteri
- Department of Food Studies and Environmental Health; University of Malta; Msida Malta
- Centre for Molecular Medicine and Biobanking; University of Malta; Msida Malta
| | - C. Chot-Plassot
- Department of Food Studies and Environmental Health; University of Malta; Msida Malta
| | - J. Sclear
- Department of Food Studies and Environmental Health; University of Malta; Msida Malta
| | - K.A. Karatzas
- Department of Food and Nutritional Science; University of Reading; Reading UK
| | - C. Scerri
- Centre for Molecular Medicine and Biobanking; University of Malta; Msida Malta
- Department of Physiology and Biochemistry; University of Malta; Msida Malta
| | - V.P. Valdramidis
- Department of Food Studies and Environmental Health; University of Malta; Msida Malta
- Centre for Molecular Medicine and Biobanking; University of Malta; Msida Malta
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21
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Brayman AA, MacConaghy BE, Wang YN, Chan KT, Monsky WL, McClenny AJ, Matula TJ. Inactivation of Planktonic Escherichia coli by Focused 2-MHz Ultrasound. Ultrasound Med Biol 2017; 43:1476-1485. [PMID: 28454842 PMCID: PMC5503452 DOI: 10.1016/j.ultrasmedbio.2017.03.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Revised: 02/24/2017] [Accepted: 03/17/2017] [Indexed: 05/16/2023]
Abstract
This study was motivated by the desire to develop a non-invasive means to treat abscesses, and represents the first steps toward that goal. Non-thermal, high-intensity focused ultrasound (HIFU) was used to inactivate Escherichia coli (∼1 × 109 cells/mL) in suspension. Cells were treated in 96-well culture plate wells using 1.95-MHz ultrasound and incident focal acoustic pressures as high as 16 MPa peak positive and 9.9 MPa peak negative (free field measurements). The surviving fraction was assessed by coliform culture and the alamarBlue assay. No biologically significant heating was associated with ultrasound exposure. Bacterial inactivation kinetics were well described by a half-life model, with a half-time of 1.2 min. At the highest exposure levels, a 2log inactivation was typically achieved within 10 min. The free field-equivalent peak negative acoustic pressure threshold for inactivation was ∼7 MPa. At the highest acoustic pressures used, inactivation efficacy was insensitive to reciprocal changes in pulse length and pulse repetition frequency at constant duty factor. Although treated volumes were very small, proof of principle was provided by these experiments.
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Affiliation(s)
- Andrew A Brayman
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, Seattle, Washington, USA.
| | - Brian E MacConaghy
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, Seattle, Washington, USA
| | - Yak-Nam Wang
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, Seattle, Washington, USA
| | - Keith T Chan
- Department of Radiology, University of Washington, Seattle, Washington, USA
| | - Wayne L Monsky
- Department of Radiology, University of Washington, Seattle, Washington, USA
| | - Anna J McClenny
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, Seattle, Washington, USA
| | - Thomas J Matula
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, Seattle, Washington, USA
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22
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Budiman PM, Wu TY, Ramanan RN, Md Jahim J. Reusing colored industrial wastewaters in a photofermentation for enhancing biohydrogen production by using ultrasound stimulated Rhodobacter sphaeroides. Environ Sci Pollut Res Int 2017; 24:15870-15881. [PMID: 28409433 DOI: 10.1007/s11356-017-8807-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 03/13/2017] [Indexed: 05/24/2023]
Abstract
One-time ultrasonication pre-treatment of Rhodobacter sphaeroides was evaluated for improving biohydrogen production via photofermentation. Batch experiments were performed by varying ultrasonication amplitude (15, 30, and 45%) and duration (5, 10, and 15 min) using combined effluents from palm oil as well as pulp and paper mill as a single substrate. Experimental data showed that ultrasonication at amplitude 30% for 10 min (256.33 J/mL) achieved the highest biohydrogen yield of 9.982 mL H2/mLmedium with 5.125% of light efficiency. A maximum CODtotal removal of 44.7% was also obtained. However, when higher ultrasonication energy inputs (>256.33 J/mL) were transmitted to the cells, biohydrogen production did not improve further. In fact, 20.6% decrease of biohydrogen yield (as compared to the highest biohydrogen yield) was observed using the most intense ultrasonicated inoculum (472.59 J/mL). Field emission scanning electron microscope images revealed the occurrence of cell damages and biomass losses if ultrasonication at 472.59 J/mL was used. The present results suggested that moderate ultrasonication pre-treatment was an effective technique to improve biohydrogen production performances of R. sphaeroides.
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Affiliation(s)
- Pretty Mori Budiman
- Chemical Engineering Discipline, School of Engineering, Monash University, Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia
| | - Ta Yeong Wu
- Chemical Engineering Discipline, School of Engineering, Monash University, Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia.
| | - Ramakrishnan Nagasundara Ramanan
- Chemical Engineering Discipline, School of Engineering, Monash University, Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia
| | - Jamaliah Md Jahim
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor Darul Ehsan, Malaysia
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Reddy GKK, Nancharaiah YV, Venugopalan VP. Long alkyl-chain imidazolium ionic liquids: Antibiofilm activity against phototrophic biofilms. Colloids Surf B Biointerfaces 2017; 155:487-496. [PMID: 28475985 DOI: 10.1016/j.colsurfb.2017.04.040] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 04/03/2017] [Accepted: 04/19/2017] [Indexed: 11/29/2022]
Abstract
Biofilm formation is problematic and hence undesirable in medical and industrial settings. In addition to bacteria, phototrophic organisms are an integral component of biofilms that develop on surfaces immersed in natural waters. 1-Alkyl-3-methyl imidazolium ionic liquids (IL) with varying alkyl chain length were evaluated for their influence on the formation of monospecies (Navicula sp.) and multispecies biofilms under phototrophic conditions. An IL with a long alkyl side chain, 1-hexadecyl-3-methylimidaazolium chloride ([C16(MIM)][Cl]) retarded growth, adhesion and biofilm formation of Navicula sp. at concentrations as low as 5μM. Interestingly, [C16(MIM)][Cl] was very effective in preventing multispecies phototrophic biofilms on fibre reinforced plastic surfaces immersed in natural waters (fresh and seawater). SYTOX® Green staining and chlorophyll leakage assay confirmed that the biocidal activity of the IL was exerted through cell membrane disruption. The data show that [C16(MIM)][Cl] is a potent inhibitor of phototrophic biofilms at micromolar concentrations and a promising agent for biofilm control in re-circulating cooling water systems. This is the first report that ionic liquids inhibit biofilm formation by phototrophic organisms which are important members of biofilms in streams and cooling towers.
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Affiliation(s)
- G Kiran Kumar Reddy
- Biofouling and Biofilm Processes Section, Water and Steam Chemistry Division, Bhabha Atomic Research Centre, Kalpakkam, 603102, India; Homi Bhabha National Institute, Anushakti Nagar Complex, Mumbai, 400 094, India
| | - Y V Nancharaiah
- Biofouling and Biofilm Processes Section, Water and Steam Chemistry Division, Bhabha Atomic Research Centre, Kalpakkam, 603102, India; Homi Bhabha National Institute, Anushakti Nagar Complex, Mumbai, 400 094, India.
| | - V P Venugopalan
- Biofouling and Biofilm Processes Section, Water and Steam Chemistry Division, Bhabha Atomic Research Centre, Kalpakkam, 603102, India; Homi Bhabha National Institute, Anushakti Nagar Complex, Mumbai, 400 094, India
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Mullick A, Neogi S. A review on acoustic methods of algal growth control by ultrasonication through existing and novel emerging technologies. REV CHEM ENG 2017. [DOI: 10.1515/revce-2016-0010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThe uncontrolled proliferation of algae and algal blooms due to excessive nutrient loading in natural and industrial water bodies is a major issue for water quality maintenance. It reduces usability of the water, imposes hazardous effects of algal toxins released from algal blooms, and creates nuisance in the operation of several industrial water units. Among several existing water treatment methods to diminish the post-algae growth effects, ultrasonication has emerged as an environmentally safe technology that does not involve any use of algaecide. The interaction of several parameters, including climatic and environmental conditions with algae growth rate, have been reviewed in this article. The effects of different acoustic operating conditions for inhibition of algae growth have also been discussed. Concern about high energy consumption led other technologies to be integrated with ultrasonication. It has enhanced the process efficiency and reduced the energy consumption as reported in some long-term field investigations and patent proposals. Several issues that require further research for making this technology widely applicable or to install an effective system design have been highlighted in this article.
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25
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Brasil CCB, Barin JS, Jacob-Lopes E, Menezes CR, Zepka LQ, Wagner R, Campagnol PCB, Cichoski AJ. Single step non-thermal cleaning/sanitation of knives used in meat industry with ultrasound. Food Res Int 2017; 91:133-139. [DOI: 10.1016/j.foodres.2016.11.030] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 11/17/2016] [Accepted: 11/27/2016] [Indexed: 01/06/2023]
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27
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Gómez-lópez VM, Gil MI, Allende A, Vanhee B, Selma MV. Water reconditioning by high power ultrasound combined with residual chemical sanitizers to inactivate foodborne pathogens associated with fresh-cut products. Food Control 2015; 53:29-34. [DOI: 10.1016/j.foodcont.2014.12.032] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Zhong H, Liu F, Lu J, Yang W, Zhao C. Effect of diesel leakage in circulating cooling water system on preponderant bacteria diversity and bactericidal effect of biocides. Environ Technol 2015; 36:1147-1159. [PMID: 25362892 DOI: 10.1080/09593330.2014.982720] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Petroleum products leakage results in adverse effect on the normal operation of a circulating cooling water system. However, relatively little research has been done to explore the effect of petroleum products leakage on circulating cooling water quality and biofilm preponderant bacteria diversity. Also, normal biocides application modes cannot fulfil the need for biofilm control. In this study, diesel oil was used as the experimental subject representing leaking petroleum products; the effect of diesel addition on biofilm preponderant bacteria diversity and the bactericidal effect of chlorine dioxide and tetradecyl dimethyl benzyl ammonium chloride (1427) was investigated. Bacterial community structures were examined by PCR-denaturing gradient gel electrophoresis and PCR cloning of 16S rDNA genes. Except for 100 mg/L diesel, increasing diesel concentration enhanced the biofilm detachment ratio compared with the control test. The microstructure of biofilm samples with 0, 300 and 900 mg/L diesel addition was observed. The species of preponderant bacteria in the biofilm sample with 300 mg/L diesel addition were more and the bacterial distribution was more uniform than those in the biofilm sample with 900 mg/L diesel addition. With ClO2 and 1427 addition, chemical oxygen demand increased, lipid phosphorus and bacterial count first decreased and then remained stable, and the bactericidal ratio first increased and then remained stable. Diesel addition variation has more obvious effect on ClO2 than 1427.
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Affiliation(s)
- Huiyun Zhong
- a College of Chemical Engineering , China University of Petroleum , 66 Changjiang West Road, Qingdao 266580 , People's Republic of China
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Vinayak V, Manoylov KM, Gateau H, Blanckaert V, Hérault J, Pencréac'h G, Marchand J, Gordon R, Schoefs B. Diatom milking: a review and new approaches. Mar Drugs 2015; 13:2629-65. [PMID: 25939034 PMCID: PMC4446598 DOI: 10.3390/md13052629] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 04/15/2015] [Accepted: 04/17/2015] [Indexed: 11/16/2022] Open
Abstract
The rise of human populations and the growth of cities contribute to the depletion of natural resources, increase their cost, and create potential climatic changes. To overcome difficulties in supplying populations and reducing the resource cost, a search for alternative pharmaceutical, nanotechnology, and energy sources has begun. Among the alternative sources, microalgae are the most promising because they use carbon dioxide (CO2) to produce biomass and/or valuable compounds. Once produced, the biomass is ordinarily harvested and processed (downstream program). Drying, grinding, and extraction steps are destructive to the microalgal biomass that then needs to be renewed. The extraction and purification processes generate organic wastes and require substantial energy inputs. Altogether, it is urgent to develop alternative downstream processes. Among the possibilities, milking invokes the concept that the extraction should not kill the algal cells. Therefore, it does not require growing the algae anew. In this review, we discuss research on milking of diatoms. The main themes are (a) development of alternative methods to extract and harvest high added value compounds; (b) design of photobioreactors;
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Affiliation(s)
- Vandana Vinayak
- Department of Criminology & Forensic Science, School of Applied Sciences, Dr. H.S. Gour University (Central University), Sagar Madhya Pradesh, India.
| | - Kalina M Manoylov
- Department of Biological & Environmental Sciences, Georgia College and State University, Milledgeville, GA 31061, USA.
| | - Hélène Gateau
- MicroMar, Mer Molécules Santé, IUML-FR 3473 CNRS, University of Le Mans, Faculté des Sciences et Techniques, Avenue Olivier Messiaen, 72085 Le Mans cedex 9, France.
| | - Vincent Blanckaert
- MicroMar, Mer Molécules Santé, IUML-FR 3473 CNRS, University of Le Mans, IUT de Laval, Rue des Drs Calmette et Guerin, 53020 Laval Cedex 9, France.
| | - Josiane Hérault
- ChimiMar, Mer Molécules Santé, IUML-FR 3473 CNRS, University of Le Mans, IUT de Laval, Rue des Drs Calmette et Guerin, 53020 Laval Cedex 9, France.
| | - Gaëlle Pencréac'h
- ChimiMar, Mer Molécules Santé, IUML-FR 3473 CNRS, University of Le Mans, IUT de Laval, Rue des Drs Calmette et Guerin, 53020 Laval Cedex 9, France.
| | - Justine Marchand
- MicroMar, Mer Molécules Santé, IUML-FR 3473 CNRS, University of Le Mans, Faculté des Sciences et Techniques, Avenue Olivier Messiaen, 72085 Le Mans cedex 9, France.
| | - Richard Gordon
- Gulf Specimen Aquarium & Marine Laboratory, Panacea, FL 32346, USA.
- Mott Center for Human Growth and Development, Department of Obstetrics & Gynecology, Wayne State University, 275 E. Hancock, Detroit, MI 48201, USA.
| | - Benoît Schoefs
- MicroMar, Mer Molécules Santé, IUML-FR 3473 CNRS, University of Le Mans, Faculté des Sciences et Techniques, Avenue Olivier Messiaen, 72085 Le Mans cedex 9, France.
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Kaur J, Karthikeyan R, Pillai SD. Effectiveness of ultrasound, UV-C, and photocatalysis on inactivation kinetics of Aeromonas hydrophila. J Environ Sci Health A Tox Hazard Subst Environ Eng 2015; 50:1223-1229. [PMID: 26301848 DOI: 10.1080/10934529.2015.1055135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this study, bactericidal effects of 24 kHz ultrasound, ultraviolet (UV-C) irradiation, and titanium dioxide (TiO2) photocatalyst were studied on inactivation of Aeromonas hydrophila, an emerging pathogen listed on the US Environmental Protection Agency's (US EPA) candidate contaminant list. Metabolic activity (using the AlamarBlue dye) assays were performed to assess the residual activity of the microbial cells after the disinfection treatments along with culture-based methods. A faster inactivation rate of 1.52 log min(-1) and inactivation of 7.62 log10 was observed within 5 min of ultrasound exposure. Ultrasound treated cells repaired by 1.4 log10 in contrast to 5.3 log10 repair for UV-C treated cells. Ultrasound treatment significantly lowered the reactivation of Aeromonas hydrophila in comparison to UV-C- and UV-C-induced photocatalysis. Ultrasound appeared to be an effective means of inactivating Aeromonas hydrophila and could be used as a potential disinfection method for water and wastewater reuse.
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Affiliation(s)
- Jasjeet Kaur
- a Department of Biological and Agricultural Engineering , Texas A&M University , College Station , Texas , USA
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Giannakis S, Papoutsakis S, Darakas E, Escalas-Cañellas A, Pétrier C, Pulgarin C. Ultrasound enhancement of near-neutral photo-Fenton for effective E. coli inactivation in wastewater. Ultrason Sonochem 2015; 22:515-526. [PMID: 24853107 DOI: 10.1016/j.ultsonch.2014.04.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2014] [Revised: 04/07/2014] [Accepted: 04/10/2014] [Indexed: 06/03/2023]
Abstract
In this study, we attempt for the first time to couple sonication and photo-Fenton for bacterial inactivation of secondary treated effluent. Synthetic wastewater was subjected to sequential high-frequency/low power sonication, followed by mild photo-Fenton treatment, under a solar simulator. It was followed by the assessment of the contribution of each component of the process (Fenton, US, hv) towards the removal rate and the long-term survival; sunlight greatly improved the treatment efficiency, with the coupled process being the only one to yield total inactivation within the 4-h period of treatment. The short-term beneficial disinfecting action of US and its detrimental effect on bacterial survival in long term, as well as the impact of light addition were also revealed. Finally, an investigation on the operational parameters of the process was performed, to investigate possible improvement and/or limitations of the coupled treatment; 3 levels of each parameter involved (hydraulic, environmental, US and Fenton) were tested. Only H2O2 increased improved the process significantly, but the action mode of the joint process indicated potential cost-effective solutions towards the implementation of this method.
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Affiliation(s)
- Stefanos Giannakis
- Laboratory of Environmental Engineering and Planning, Department of Civil Engineering, Aristotle University of Thessaloniki, 54624 Thessaloniki, Greece; Laboratory of Control of Environmental Contamination, Institute of Textile Research and Industrial Cooperation of Terrassa (INTEXTER), Universitat Politècnica de Catalunya, Colom 15, 08222 Terrassa, Catalonia, Spain; Swiss Federal Institute of Technology, Lausanne, Institute of Chemical Sciences and Engineering, 1015 Lausanne, Switzerland
| | - Stefanos Papoutsakis
- Swiss Federal Institute of Technology, Lausanne, Institute of Chemical Sciences and Engineering, 1015 Lausanne, Switzerland
| | - Efthymios Darakas
- Laboratory of Environmental Engineering and Planning, Department of Civil Engineering, Aristotle University of Thessaloniki, 54624 Thessaloniki, Greece
| | - Antoni Escalas-Cañellas
- Laboratory of Control of Environmental Contamination, Institute of Textile Research and Industrial Cooperation of Terrassa (INTEXTER), Universitat Politècnica de Catalunya, Colom 15, 08222 Terrassa, Catalonia, Spain; Department of Chemical Engineering & Terrassa School of Engineering, Universitat Politècnica de Catalunya, Colom 1, 08222 Terrassa, Catalonia, Spain
| | - Christian Pétrier
- Laboratoire Rhéologie et Procédés, Grenoble-INP, UMR CNRS 5520, BP 53, 38041 Grenoble Cedex 9, France; King AbdulAziz University, Jeddah, Saudi Arabia
| | - César Pulgarin
- Swiss Federal Institute of Technology, Lausanne, Institute of Chemical Sciences and Engineering, 1015 Lausanne, Switzerland.
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Zhao J, Su R, Guo X, Li W, Feng N. Role of mixing conditions on coagulation performance and flocs breakage formed by magnesium hydroxide. J Taiwan Inst Chem Eng 2014. [DOI: 10.1016/j.jtice.2013.12.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Gómez-lópez VM, Gil MI, Allende A, Blancke J, Schouteten L, Selma MV. Disinfection Capacity of High-Power Ultrasound Against E. coli O157:H7 in Process Water of the Fresh-Cut Industry. FOOD BIOPROCESS TECH 2014; 7:3390-7. [DOI: 10.1007/s11947-014-1346-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Abstract
Chronic rhinosinusitis (CRS) is a chronic infective, inflammatory upper respiratory disease. While the current medical treatment of CRS focuses on the systemic and topical use of steroids and/or antibiotics, many bacteria residing on mucosal surfaces of patients with CRS exist in a biofilm state, making them resistant to most systemic antibiotics. Alternative therapeutic strategies that include blocking bacterial molecular communication, inhibiting biofilm matrix production and breaking down bacterial biofilms are all being explored. Physical therapies such as therapeutic ultrasound (US) have been advocated and utilized as a treatment modality for CRS for many years. US may have antiinflammatory actions and can also be used for the local delivery of drugs through the skin. Therapeutic US, which has been shown in clinical studies to be an effective treatment for both acute rhinosinusitis and CRS, offers significant potential in CRS management.
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Affiliation(s)
- Jim Bartley
- Department of Surgery, University of Auckland, 10 Owens Road, Auckland, 1023, New Zealand,
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Gholami M, Mirzaei R, Mohammadi R, Zarghampour Z, Afshari A. Destruction of Escherichia coli and Enterococcus faecalis using Low Frequency Ultrasound Technology: A Response Surface Methodology. Health Scope 2014. [DOI: 10.17795/jhealthscope-14213] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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36
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Nithila SDR, Anandkumar B, Vanithakumari SC, George RP, Mudali UK, Dayal RK. Studies to control biofilm formation by coupling ultrasonication of natural waters and anodization of titanium. Ultrason Sonochem 2014; 21:189-199. [PMID: 23871547 DOI: 10.1016/j.ultsonch.2013.06.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Revised: 06/11/2013] [Accepted: 06/11/2013] [Indexed: 06/02/2023]
Abstract
The main objective of this study was to investigate the combined effect of ultrasonication of natural waters and anodization of titanium on microbial density and biofilm formation tendency on titanium surfaces. Application of 24 kHz, 400 W high power ultrasound through a 14 mm horn type SS (stainless steel) Sonicator with medium amplitude of 60% for 30 min brought about three order decrease in total bacterial density of laboratory tap water, cooling tower water and reservoir water and two order decrease in seawater. Studies on the effect of ultrasonication on dilute pure cultures of Gram-negative and Gram-positive bacteria showed five order and three order decrease for Pseudomonas sp. and Flavobacterium sp. respectively and two order and less than one order decrease for Bacillus sp. and Micrococcus sp. respectively. Ultrasonication increased lag phase and reduced logarithmic population increase and specific growth rate of Gram-negative bacteria whereas for Gram-positive bacteria specific growth rate increased. Studies on the biofilm formation tendency of these ultrasonicated mediums on titanium surface showed one order reduction under all conditions. Detailed biofilm imaging by advanced microscopic techniques like AFM, SEM and epifluorescence microscopy clearly visualized the lysed/damaged cells and membrane perforations due to ultrasonication. Combination of ultrasonication and anodization brought about maximum decrease in bacterial density and biofilm formation with greater than two order decrease in seawater, two order decrease in Bacillus sp. culture and more than four order decrease in Flavobacterium sp. culture establishing the synergistic effect of anodization and ultrasonication in this study.
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Affiliation(s)
- S D Ruth Nithila
- Corrosion Science and Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India
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37
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Huang Y, Bai Y, Wang Y, Kong H. Allelopathic effects of the extracts from an invasive species Solidago canadensis
L. on Microcystis aeruginosa. Lett Appl Microbiol 2013; 57:451-8. [DOI: 10.1111/lam.12133] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 07/08/2013] [Accepted: 07/08/2013] [Indexed: 11/30/2022]
Affiliation(s)
- Y. Huang
- School of Environmental Science and Engineering; Shanghai Jiao Tong University; Shanghai China
| | - Y. Bai
- School of Environmental Science and Engineering; Shanghai Jiao Tong University; Shanghai China
| | - Y. Wang
- School of Public Health; Shanghai Jiao Tong University; Shanghai China
| | - H. Kong
- School of Environmental Science and Engineering; Shanghai Jiao Tong University; Shanghai China
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38
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Axelsson L, Holck A, Rud I, Samah D, Tierce P, Favre M, Kure CF. Cleaning of conveyor belt materials using ultrasound in a thin layer of water. J Food Prot 2013; 76:1401-7. [PMID: 23905796 DOI: 10.4315/0362-028x.jfp-12-563] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Cleaning of conveyor belts in the food industry is imperative for preventing the buildup of microorganisms that can contaminate food. New technologies for decreasing water and energy consumption of cleaning systems are desired. Ultrasound can be used for cleaning a wide range of materials. Most commonly, baths containing fairly large amounts of water are used. One possibility to reduce water consumption is to use ultrasonic cavitation in a thin water film on a flat surface, like a conveyor belt. In order to test this possibility, a model system was set up, consisting of an ultrasound transducer/probe with a 70-mm-diameter flat bottom, operating at 19.8 kHz, and contaminated conveyor belt materials in the form of coupons covered with a thin layer of water or water with detergent. Ultrasound was then applied on the water surface at different power levels (from 46 to 260 W), exposure times (10 and 20 s), and distances (2 to 20 mm). The model was used to test two different belt materials with various contamination types, such as biofilms formed by bacteria in carbohydrate- or protein-fat-based soils, dried microorganisms (bacteria, yeasts, and mold spores), and allergens. Ultrasound treatment increased the reduction of bacteria and yeast by 1 to 2 log CFU under the most favorable conditions compared with water or water-detergent controls. The effect was dependent on the type of belt material, the power applied, the exposure time, and the distance between the probe and the belt coupon. Generally, dried microorganisms were more easily removed than biofilms. The effect on mold spores was variable and appeared to be species and material dependent. Spiked allergens were also efficiently removed by using ultrasound. The results in this study pave the way for new cleaning designs for flat conveyor belts, with possibilities for savings of water, detergent, and energy consumption.
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Affiliation(s)
- L Axelsson
- Nofima-Norwegian Institute of Food Fisheries and Aquaculture Research, P.O. Box 210, N-1431 Ås, Norway.
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Bilek SE, Turantaş F. Decontamination efficiency of high power ultrasound in the fruit and vegetable industry, a review. Int J Food Microbiol 2013; 166:155-62. [PMID: 23867364 DOI: 10.1016/j.ijfoodmicro.2013.06.028] [Citation(s) in RCA: 130] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Revised: 06/18/2013] [Accepted: 06/24/2013] [Indexed: 11/19/2022]
Abstract
Decontamination of fresh fruits and vegetables is an important unsolved technological problem. The main focus of this review is to summarize and synthesize the results of studies and articles about ultrasonic processing which can be adapted to the wash water decontamination process for fruits and vegetables. This review will also provide an overview about the importance of an effective wash water decontamination process in fruits and vegetables, the increase of foodborne outbreaks caused by fresh fruits and vegetables, microbial inactivation using ultrasound, and an interpretation of the high power ultrasound results in the fruits and vegetable industry. In addition, the limitations of ultrasonic processing in commercial applications have also been introduced.
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Affiliation(s)
- Seda Ersus Bilek
- Ege University, Engineering Faculty, Food Engineering Department, 35100 Bornova, Izmir, Turkey.
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Abstract
Bacterial biofilms have been implicated in many chronic infective diseases, including chronic rhinosinusitis (CRS). Therapeutic ultrasound enhances the breakdown of bacterial biofilms and is clinically effective in CRS treatment, while phonophoresis has also been utilized for antibiotic delivery through the skin. The objective of this case report is to describe the results of a novel treatment, erythromycin phonophoresis, in a woman with CRS. A 31-year-old woman with a 7-month history of CRS refractory to conventional medical management was treated with erythromycin phonophoresis to both maxillary sinuses. Individual sinus symptom severity was assessed and sinus CT scans were obtained both pretreatment and posttreatment. After treatment, the total sinusitis symptom score improved from 12 to 0 and the CT scan showed almost complete disease resolution. At 5-month follow-up, the patient reported sustained improvement. Erythromycin phonophoresis has potential as an effective treatment for CRS.
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Affiliation(s)
- Noureddin Nakhostin Ansari
- Department of Physiotherapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran.
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Chapman JS, Ferguson R, Consalo C, Bliss T. Bacteriostatic effect of sequential hydrodynamic and ultrasound-induced stress. J Appl Microbiol 2013; 114:947-55. [PMID: 23360068 DOI: 10.1111/jam.12146] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Revised: 11/12/2012] [Accepted: 11/18/2012] [Indexed: 12/01/2022]
Abstract
AIMS To elucidate the mechanism of action of a nonchemical microbial control technology employing coupled hydrodynamic and ultrasound-induced stress. METHODS & RESULTS The effects of a laboratory model system using a commercial nonchemical device on Pseudomonas putida revealed growth and respiration were inhibited without a loss of viability from the treated population. Damage to cell membranes was evident using fluorescent microscopy and a reporter strain containing lux genes fused with a membrane damage stress-response promoter. Other reporter strains also indicated the possible involvement of DNA and protein repair systems. A consequence of treatment was a reduced ability to form biofilms. CONCLUSIONS The nonchemical device caused a biostatic effect on treated cells induced by sublethal damage to several cellular systems, including cell membranes. SIGNIFICANCE AND IMPACT OF THE STUDY The study demonstrates that biostasis can be an effective mechanism for microbial control in some industrial systems and provides insight into understanding and applying this device and other nonchemical microbial control technologies to real-world problems of microbial contamination.
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Affiliation(s)
- J S Chapman
- Ashland Water Technologies, Inc, Wilmington, DE 19808, USA.
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43
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Rajasekhar P, Fan L, Nguyen T, Roddick FA. A review of the use of sonication to control cyanobacterial blooms. Water Res 2012; 46:4319-4329. [PMID: 22727861 DOI: 10.1016/j.watres.2012.05.054] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2012] [Revised: 05/15/2012] [Accepted: 05/27/2012] [Indexed: 06/01/2023]
Abstract
The development of cyanobacterial blooms in water bodies imparts undesirable characteristics to the water such as odours, tastes and the potential presence of toxins. Several chemical and physical methods have been used to control the blooms, but have limitations in terms of pollution and application on a large scale. A more recent approach has been the use of sonication in the control of cyanobacteria (also referred to as blue-green algae). This paper reviews current advancements in research on using sonication to control cyanobacteria, particularly Microcystis aeruginosa, as it is a prevalent and a major bloom-forming toxic species. The impact of sonication on the structure and function of M. aeruginosa is discussed, including the influence of sonication parameters such as power intensity, frequency and exposure time. Alternate strategies of cyanobacterial control in combination with sonication are also reviewed.
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Affiliation(s)
- Pradeep Rajasekhar
- School of Civil, Environmental and Chemical Engineering, RMIT University, 124 La Trobe St., Melbourne, Victoria 3001, Australia
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44
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Gallipoli A, Braguglia CM. High-frequency ultrasound treatment of sludge: combined effect of surfactants removal and floc disintegration. Ultrason Sonochem 2012; 19:864-871. [PMID: 22245371 DOI: 10.1016/j.ultsonch.2011.12.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2011] [Revised: 12/16/2011] [Accepted: 12/17/2011] [Indexed: 05/31/2023]
Abstract
Ultrasounds represent an effective technology in many research fields. In sewage sludge treatment, low-frequency ultrasound, particularly at 20 kHz, are widely used for sludge disintegration before the anaerobic digestion, while in the last years novel application of high-frequency ultrasound regards the decontamination of water and wastewater through sonochemical reactions. The innovative approach presented in this paper is the treatment of sewage sludge with ultrasound at 200 kHz for obtaining efficient sludge disintegration and the removal of the linear alkylbenzenesulphonates (LAS) at the same time. Results of the sonolysis experiments showed that native LAS degradation up to 40% can be achieved with low power input in less than 1h. The degradation pattern was different for each LAS homologue (from C10 to C13), because of their physical-chemical properties, in particular as regards the alkyl chain length. This high-frequency ultrasound irradiation resulted effective also in terms of floc disintegration and soluble organic matter release, in particular for energy inputs higher than 30,000 kJ/kg TS. The disrupting effect of the 200 kHz treatment was also evaluated by microscope analyses and determination of the extracellular polymeric substances release in the liquid phase.
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Affiliation(s)
- A Gallipoli
- Water Research Institute, CNR, Area di Ricerca RM1-Montelibretti, Via Salaria km 29.300, 00015 Monterotondo, Roma, Italy
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Terada A, Okuyama K, Nishikawa M, Tsuneda S, Hosomi M. The effect of surface charge property on Escherichia coli initial adhesion and subsequent biofilm formation. Biotechnol Bioeng 2012; 109:1745-54. [DOI: 10.1002/bit.24429] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2011] [Revised: 12/19/2011] [Accepted: 12/21/2011] [Indexed: 11/08/2022]
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Frontistis Z, Mantzavinos D. Sonodegradation of 17α-ethynylestradiol in environmentally relevant matrices: laboratory-scale kinetic studies. Ultrason Sonochem 2012; 19:77-84. [PMID: 21782489 DOI: 10.1016/j.ultsonch.2011.06.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2011] [Revised: 06/26/2011] [Accepted: 06/27/2011] [Indexed: 05/31/2023]
Abstract
The sonochemical degradation of 17α-ethynylestradiol (EE2) in secondary treated effluents was investigated. Ultrasound irradiation was provided by a horn-type sonicator operating at 80 kHz. The effect of various operating conditions such as estrogen concentration (25-160 μg/L), power density (18-46 W/L), liquid bulk temperature (15-60 °C), gas sparging (air, oxygen, and helium), solution pH (3 and 7.8), as well as the addition of radical promoters (hydrogen peroxide) or catalysts (TiO2 and Fe2+) on degradation kinetics was evaluated. Changes in estrogen concentration were followed by high performance liquid chromatography and the yeast estrogen screening (YES) assay. EE2 degradation in the range 25-110 μg/L follows first order kinetics in regard to its concentration, while lower order kinetics occur at higher concentrations. The reaction rate increases linearly with applied power and decreases exponentially with temperature at the conditions in question. Continuous sparging of air or oxygen has little effect on the kinetics relative to air-equilibrated conditions, while helium has a marginally positive effect. The inorganic and organic contents of the wastewater matrix appear to promote degradation at inherent conditions in comparison to experiments in ultrapure water. Nevertheless, the addition of H2O2 (8.6 and 86 mg/L), Fe2+ (2.5-25 mg/L) or TiO2 (50-2000 mg/L) has no or, in some cases, adverse effect on kinetics.
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Affiliation(s)
- Zacharias Frontistis
- Department of Environmental Engineering, Technical University of Crete, Polytechneioupolis, GR-73100 Chania, Greece
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47
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Zhu X, Xie X, Liao Q, Wang Y, Lee D. Enhanced hydrogen production by Rhodopseudomonas palustris CQK 01 with ultra-sonication pretreatment in batch culture. Bioresour Technol 2011; 102:8696-8699. [PMID: 21411314 DOI: 10.1016/j.biortech.2011.02.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Revised: 02/04/2011] [Accepted: 02/06/2011] [Indexed: 05/30/2023]
Abstract
In the present study, the photo-hydrogen production performances by Rhodopseudomonas palustris CQK 01 growing from the inoculated cells with ultra-sonication pretreatment (R. palustris CQK 01-USP) were experimentally investigated in batch culture and compared with that without pretreatment (R. palustris CQK 01-NP). It was found that the ultra-sonication pretreatment modified membrane morphology and broke up part of the cells, resulting in improvement of membrane permeability and bacterial activities and hence, helping the improvement of hydrogen production. The hydrogen production rate, hydrogen yield and energy conversion efficiency with R. palustris CQK 01-USP were increased to be nearly 2 times higher than that with R. palustris CQK 01-NP. The parametric study showed that under the conditions of initial glucose concentration 50 mmol/l, inoculum size 12%, illumination wavelength 590 nm, the photobioreactor with R. palustris CQK 01-USP obtained the optimal hydrogen production rate 0.54 mmol/l/h, hydrogen yield 1.2 mol-H2/mol-glucose and energy conversion efficiency 9.03%.
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Affiliation(s)
- Xun Zhu
- Institute of Engineering Thermophysics, Chongqing University, Chongqing 400030, China.
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Agarwal A, Ng WJ, Liu Y. Principle and applications of microbubble and nanobubble technology for water treatment. Chemosphere 2011; 84:1175-80. [PMID: 21689840 DOI: 10.1016/j.chemosphere.2011.05.054] [Citation(s) in RCA: 356] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2011] [Revised: 05/24/2011] [Accepted: 05/25/2011] [Indexed: 05/23/2023]
Abstract
In recent years, microbubble and nanobubble technologies have drawn great attention due to their wide applications in many fields of science and technology, such as water treatment, biomedical engineering, and nanomaterials. In this paper, we discuss the physics, methods of generation of microbubbles (MBs) and nanobubbles (NBs), while production of free radicals from MBs and NBs are reviewed with the focuses on degradation of toxic compounds, water disinfection, and cleaning/defouling of solid surfaces including membrane. Due to their ability to produce free radicals, it can be expected that the future prospects of MBs and NBs will be immense and yet more to be explored.
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Affiliation(s)
- Ashutosh Agarwal
- Division of Environmental and Water Resource Engineering, School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
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Sáez V, Esclapez MD, Tudela I, Bonete P, Louisnard O, González-García J. 20 kHz sonoelectrochemical degradation of perchloroethylene in sodium sulfate aqueous media: influence of the operational variables in batch mode. J Hazard Mater 2010; 183:648-654. [PMID: 20705391 DOI: 10.1016/j.jhazmat.2010.07.074] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2010] [Revised: 07/15/2010] [Accepted: 07/16/2010] [Indexed: 05/29/2023]
Abstract
A preliminary study of the 20 kHz sonoelectrochemical degradation of perchloroethylene in aqueous sodium sulfate has been carried out using controlled current density degradation sonoelectrolyses in batch mode. An important improvement in the viability of the sonochemical process is achieved when the electrochemistry is implemented, but the improvement of the electrochemical treatment is lower when the 20 kHz ultrasound field is simultaneously used. A fractional conversion of 100% and degradation efficiency around 55% are obtained independently of the ultrasound power used. The current efficiency is also enhanced compared to the electrochemical treatment and a higher speciation is also detected; the main volatile compounds produced in the electrochemical and sonochemical treatment, trichloroethylene and dichloroethylene, are not only totally degraded, but also at shorter times than in the sonochemical or electrochemical treatments.
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Affiliation(s)
- Verónica Sáez
- Grupo de Nuevos Desarrollos Tecnológicos en Electroquímica: Sonoelectroquímica y Bioelectroquímica, Ap. Correos 99, 03080 Alicante, Spain
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