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Wu Y, Niu J, Yuan X, Liu Y, Zhai S, Zhao Y. Polydopamine and calcium functionalized fiber carrier for enhancing microbial attachment and Cr(VI) resistance. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 903:166626. [PMID: 37643709 DOI: 10.1016/j.scitotenv.2023.166626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 08/25/2023] [Accepted: 08/25/2023] [Indexed: 08/31/2023]
Abstract
The formation of biofilm determines the performance and stability of biofilm system. Increasing the hydrophilicity of the carrier surface could efficiently accelerate the attachment and growth of microorganisms. Here, the surface of polypropylene (PP) fiber carrier was modified with polydopamine (PDA) and calcium (Ca(II)) to enhance microbial attachment and toxicity resistance. The results of surface characteristic confirmed the self-polymerization of PDA and the chelation mechanism of Ca(II). Subsequently, the biofilm formation experiments were conducted in sequencing batch biofilm reactors using both normal and chromium-containing wastewater. The biofilm on the surface of the modified carrier exhibited better nitrogen removal and Cr(VI) reduction ability. The biomass of the modified carrier was significantly increased, and the maximum microbial attachment amounts in normal wastewater and chrome-containing wastewater were 1153.34 and 511.78 mg/g carrier, respectively. Furthermore, the confocal laser scanning microscope (CLSM) indicated that the modified carrier coated with PDA and Ca(II) were both biocompatible, and the cell activity was significantly increased. 16S rRNA sequencing results showed that the modified carrier efficiently enriched both denitrification bacteria (Thauera and Flavobacterium) and chrome-reducing bacteria (Simplicispira and Arenimonas) to improve system stability and Cr(VI) resistance. Microbial phenotype prediction based on BugBase analysis further verified the enrichment effect of modified carriers on microorganisms responsible for biofilm formation and oxidative stress resistance. Overall, this work proposed a novel functional carrier that could provide references for advancing the application of biofilm systems in wastewater treatment.
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Affiliation(s)
- Yichen Wu
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Jiaojiao Niu
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Xin Yuan
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Yinuo Liu
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Siyuan Zhai
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Yingxin Zhao
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China.
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2
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Razzaq W, Serra CA, Jacomine L, Chan-Seng D. Microfluidic elaboration of polymer microfibers from miscible phases: Effect of operating and material parameters on fiber diameter. J Taiwan Inst Chem Eng 2022. [DOI: 10.1016/j.jtice.2022.104215] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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3
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Zhao Y, Zhang R, Jing L, Wang W. Performance of basalt fiber-periphyton in deep-level nutrient removal: A study concerned periphyton cultivation, characterization and application. CHEMOSPHERE 2022; 291:133044. [PMID: 34826450 DOI: 10.1016/j.chemosphere.2021.133044] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 10/12/2021] [Accepted: 11/21/2021] [Indexed: 06/13/2023]
Abstract
Nutrients in centralized discharge area of treated sewage can cause high ecological risks to aquatic systems, thus a deep-level nutrient removal is necessary. Recently, periphyton has attracted increasing interests for its excellent performance in nutrient removal. In this study, the suitability and durability of basalt fiber (BF) as a new green carrier of periphyton was evaluated, and development process of basalt fiber-periphtyon (BFP) was tracked with bacterial community succession and physiological indicators. Then, well-developed BFP was applied to deeply purify water containing the same concentration of nutrient as the treated sewage. Results showed the periphyton could adapt to BF and formed in large quantities. In addition, the tensile strength of BF after being used as a carrier was still strong. Bacterial community and physiological indicators indicated that BFP was well developed in 40-50 days. LEfSE and random forest analysis revealed that Deinococcus-Deinococci, Spartobacteria and Chlamydiia at class-level, Rhizobiales and Rhodobacterales at order-level were the biomarkers for development of BFP. Moreover, application results showed BFP efficiently removed nitrogen and phosphorus from water and promoted the transformation of ammonia to nitrate. The concentration of ammonia and phosphorus severely decreased from 4.90 ± 0.11 mg/L to 0.51 ± 0.20 mg/L, from 0.66 ± 0.016 mg/L to 0.023 ± 0.013 mg/L, respectively. The efficient nutrient removal was attributed to accumulation of nitrogen and phosphorus metabolism related organisms in BFP as well as favorable water physic-chemical conditions created by BFP. These results suggest that BF is a suitable and durable green carrier of periphyton, and BFP could efficiently reduce ecological risk to aquatic systems receiving treated sewage.
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Affiliation(s)
- Yue Zhao
- Key Laboratory of Pollution Control Chemistry and Environmental Functional Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu, 610041, China; Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu, 610041, China
| | - Run Zhang
- Key Laboratory of Pollution Control Chemistry and Environmental Functional Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu, 610041, China; Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu, 610041, China
| | - Liandong Jing
- Key Laboratory of Pollution Control Chemistry and Environmental Functional Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu, 610041, China; Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu, 610041, China.
| | - Wenjing Wang
- Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, 7 Chunhui Road, Yantai, 264003, China
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Biological treatment of coke plant effluents: from a microbiological perspective. Biol Futur 2021; 71:359-370. [PMID: 34554459 DOI: 10.1007/s42977-020-00028-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 07/01/2020] [Indexed: 10/23/2022]
Abstract
During coke production, large volume of effluent is generated, which has a very complex chemical composition and contains several toxic and carcinogenic substances, mainly aromatic compounds, cyanide, thiocyanate and ammonium. The composition of these high-strength effluents is very diverse and depends on the quality of coals used and the operating and technological parameters of coke ovens. In general, after initial physicochemical treatment, biological purification steps are applied in activated sludge bioreactors. This review summarizes the current knowledge on the anaerobic and aerobic transformation processes and describes key microorganisms, such as phenol- and thiocyanate-degrading, floc-forming, nitrifying and denitrifying bacteria, which contribute to the removal of pollutants from coke plant effluents. Providing the theoretical basis for technical issues (in this case the microbiology of coke plant effluent treatment) aids the optimization of existing technologies and the design of new management techniques.
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Nechanická M, Dolinová I, Špánek R, Tomešová D, Dvořák L. Application of nanofiber carriers for sampling of microbial biomass from contaminated groundwater. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 780:146518. [PMID: 34030297 DOI: 10.1016/j.scitotenv.2021.146518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 03/09/2021] [Accepted: 03/12/2021] [Indexed: 06/12/2023]
Abstract
Sampling of microbial biomass is crucial for understanding and controlling remediation processes ongoing at contaminated sites in general, particularly when molecular genetic analyses are employed. In this study, fiber-based carriers with a nanofiber layer were developed and tested as a method to sample microbial biomass in groundwater for molecular genetic analysis. Nanofiber carriers, varying in the shape and the linear density of nanofibers, were examined throughout a 27-month monitoring period in groundwater contaminated with benzene, toluene, ethylbenzene and xylene isomers (BTEX), and chlorinated ethenes. The effect of carrier shape and nanofiber layer density on the microbial surface colonization and composition of the microbial biofilm was determined using real-time PCR and next-generation sequencing (NGS) analysis. Differences in microbial community composition between nanofiber carriers, groundwater, and soil samples were also analyzed to assess the applicability of carriers for biomass sampling at contaminated sites. The nanofiber carriers showed their applicability as a sampling tool, particularly because of their easy manipulation that facilitates DNA isolation. The majority of taxa (Proteobacteria, Firmicutes, and Bacteroidetes) present on the carrier surfaces were also detected in the groundwater. Moreover, the microbial community on all nanofiber carriers reflected the changes in the chemical composition of groundwater. Although the carrier characteristics (shape, nanofiber layer) did not substantially influence the microbial community on the carrier surface, the circular and planar carriers with a nanofiber layer displayed faster microbial surface colonization. However, the circular carrier was the most suitable for biomass sampling in groundwater because of its high contact area and because it does not require pre-treatment prior to DNA extraction.
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Affiliation(s)
- Magda Nechanická
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentska 2, 461 17 Liberec, Czech Republic
| | - Iva Dolinová
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentska 2, 461 17 Liberec, Czech Republic; Department of Biochemistry, Liberec Regional Hospital, Husova 357/10, 460 01 Liberec, Czech Republic
| | - Roman Špánek
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentska 2, 461 17 Liberec, Czech Republic
| | - Denisa Tomešová
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentska 2, 461 17 Liberec, Czech Republic
| | - Lukáš Dvořák
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentska 2, 461 17 Liberec, Czech Republic.
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Biodegradation and Absorption Technology for Hydrocarbon-Polluted Water Treatment. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10030841] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Wastewaters polluted with hydrocarbons are an environmental problem that has a significant impact on the natural ecosystem and on human health. Thus, the aim of this research was to develop a bioreactor sorbent technology for treating these polluted waters. A lab-scale plant composed of three 1-L bioreactors with different sorbent materials inside (meltblown polypropylene and granulated cork) was built. Wastewater to be treated was recirculated through each bioreactor for 7 days. Results showed that hydrocarbon retention rates in the three bioreactors ranged between 92.6% and 94.5% of total petroleum hydrocarbons (TPHs) and that after one simple recirculation cycle, no hydrocarbon fractions were detected by gas chromatography/Mass Spectrometry (GC/MS) in the effluent wastewater. In addition, after the wastewater treatment, the sorbent materials were extracted from the bioreactors and deposited in vessels to study the biodegradation of the retained hydrocarbons by the wastewater indigenous microbiota adhered to sorbents during the wastewater treatment. A TPH removal of 41.2% was detected after one month of Pad Sentec™ carrier treatment. Further, the shifts detected in the percentages of some hydrocarbon fractions suggested that biodegradation is at least partially involved in the hydrocarbon removal process. These results proved the efficiency of this technology for the treatment of these hydrocarbon-polluted-waters.
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Zhang X, Wei J, Zhou X, Horio A, Li S, Chen Y, Jiang S, Liang Z, Wu Z, Qiu F. Evaluation of modified basalt fiber as biological carrier media for wastewater treatment with the extended DLVO theory model. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:29789-29798. [PMID: 31407258 DOI: 10.1007/s11356-019-06133-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 07/29/2019] [Indexed: 06/10/2023]
Abstract
In this study, environment-friendly inorganic basalt fiber (BF) was used as bio-carrier for wastewater treatment. To enhance the bio-affinity, raw BF was modified by grafting the diethylamino functional groups to make the surface more hydrophilic and electro-positive. Contact angle and zeta potential of modified basalt fiber (MBF) were characterized. The capacity of MBF bio-carriers was evaluated by microorganism immobilization tests. To explain the mechanism of capacity enhancement by modification, the profiles of total interaction energy barrier between raw BF (or MBF) and bacteria (Escherichia coli, E. coli) were discussed based on the extended Derjaguin-Landau-Verwey-Overbeek (DLVO) theory. The results showed the contact angle of fiber decreased from 89.71° to 63.08° after modification, and zeta potential increased from - 18.53 to +10.58 mV. The microorganism immobilization tests showed that the surface modification accelerated the initial bacterial adhesion on fiber. The total interaction energy barrier between MBF and E. coli disappeared as a result of electrostatic and hydrophilic attractive forces, and enhanced the irreversible adhesion. MBF bio-carrier medium provides a promising alternative to conventional bio-carrier materials for wastewater treatment. Graphical abstract.
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Affiliation(s)
- Xiaoying Zhang
- Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Jiangsu, 212013, China
| | - Jing Wei
- Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Jiangsu, 212013, China.
| | - Xiangtong Zhou
- Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Jiangsu, 212013, China
| | - Akihiro Horio
- Department of Civil Engineering, National Institute of Technology, Gunma College, Gunma, 371-8530, Japan
| | - Shanwei Li
- Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Jiangsu, 212013, China
| | - Yuanyuan Chen
- Jiangsu ATK Environmental Engineering R&D Institute, Jiangsu, 214214, China
| | - Suying Jiang
- Jiangsu ATK Environmental Engineering R&D Institute, Jiangsu, 214214, China
| | - Zhishui Liang
- School of Civil Engineering, Southeast University, Jiangsu, 210096, China
| | - Zhiren Wu
- Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Jiangsu, 212013, China.
| | - Fengxian Qiu
- Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Jiangsu, 212013, China
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Kregiel D, Rygala A, Kolesinska B, Nowacka M, Herc AS, Kowalewska A. Antimicrobial and Antibiofilm N-acetyl-L-cysteine Grafted Siloxane Polymers with Potential for Use in Water Systems. Int J Mol Sci 2019; 20:E2011. [PMID: 31022884 PMCID: PMC6515369 DOI: 10.3390/ijms20082011] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 04/16/2019] [Accepted: 04/22/2019] [Indexed: 01/28/2023] Open
Abstract
Antibiofilm strategies may be based on the prevention of initial bacterial adhesion, the inhibition of biofilm maturation or biofilm eradication. N-acetyl-L-cysteine (NAC), widely used in medical treatments, offers an interesting approach to biofilm destruction. However, many Eubacteria strains are able to enzymatically decompose the NAC molecule. This is the first report on the action of two hybrid materials, NAC-Si-1 and NAC-Si-2, against bacteria isolated from a water environment: Agrobacterium tumefaciens, Aeromonas hydrophila, Citrobacter freundii, Enterobacter soli, Janthinobacterium lividum and Stenotrophomonas maltophilia. The NAC was grafted onto functional siloxane polymers to reduce its availability to bacterial enzymes. The results confirm the bioactivity of NAC. However, the final effect of its action was environment- and strain-dependent. Moreover, all the tested bacterial strains showed the ability to degrade NAC by various metabolic routes. The NAC polymers were less effective bacterial inhibitors than NAC, but more effective at eradicating mature bacterial biofilms.
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Affiliation(s)
- Dorota Kregiel
- Institute of Fermentation Technology and Microbiology, Lodz University of Technology, Wolczanska 171/173, 90-924 Lodz, Poland.
| | - Anna Rygala
- Institute of Fermentation Technology and Microbiology, Lodz University of Technology, Wolczanska 171/173, 90-924 Lodz, Poland.
| | - Beata Kolesinska
- Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.
| | - Maria Nowacka
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.
| | - Agata S Herc
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.
| | - Anna Kowalewska
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.
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Svobodová L, Lederer T, Rosická P, Svoboda P, Novák L, Dostálková J, Jirků V. Advanced characterization of natural biofilm on nanofiber scaffold. Physiol Res 2019; 68:S491-S499. [DOI: 10.33549/physiolres.934384] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Nanofiber scaffolds provide numerous advantages over common carriers engineered for microorganisms. The most important advantage is an increased speed of primary surface colonization (up to four times faster), which shortens the time required for the areal biofilm formation and optimum performance of attached microorganisms (higher efficiency of biological activity of up to twice as fast). Image analysis predicts early formation of biofilm even in beginning stages; analysis of biofilm reveals the different structures of bacterial colonies on both scaffolds (higher porosity, size, and number of bacterial colonies on nanofiber’s surface). The image analysis correlates well with determinations of dry matter (linear correlation of 0.96) and proteins (linear correlation of 0.89).
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Affiliation(s)
- L. Svobodová
- Faculty of Mechanical Engineering, Department of Material Science, Technical University of Liberec, Liberec, Czech Republic.
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Hu H, He J, Yu H, Liu J, Zhang J. A strategy to speed up formation and strengthen activity of biofilms at low temperature. RSC Adv 2017. [DOI: 10.1039/c7ra02223a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The start-up period of biofilm reactors often takes a long time to obtain a mature and stable biofilm, especially at low temperature.
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Affiliation(s)
- Huizhi Hu
- School of Municipal and Environmental Engineering
- Harbin Institute of Technology
- Harbin
- China
| | - Junguo He
- School of Municipal and Environmental Engineering
- Harbin Institute of Technology
- Harbin
- China
| | - Huarong Yu
- School of Municipal and Environmental Engineering
- Harbin Institute of Technology
- Harbin
- China
| | - Jian Liu
- Central and Southern China Municipal Engineering Design and Research Institute Co., Ltd
- Wuhan
- China
| | - Jie Zhang
- School of Municipal and Environmental Engineering
- Harbin Institute of Technology
- Harbin
- China
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Hu H, He J, Liu J, Yu H, Zhang J. Biofilm activity and sludge characteristics affected by exogenous N-acyl homoserine lactones in biofilm reactors. BIORESOURCE TECHNOLOGY 2016; 211:339-47. [PMID: 27030953 DOI: 10.1016/j.biortech.2016.03.068] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 03/11/2016] [Accepted: 03/13/2016] [Indexed: 05/03/2023]
Abstract
This study verified the effect of N-acyl homoserine lactone (AHL) concentrations on mature biofilm systems. Three concentrations of an AHL mixture were used in the batch test. Introducing of 5nM AHLs significantly increased biofilm activity and increased sludge characteristics, which resulted in better pollutant removal performance, whereas exogenous 50nM and 500nM AHLs limited pollutant removal, especially COD and nitrogen removal. To further identify how exogenous signal molecular affects biofilm system nitrogen removal, analyzing of nitrifying bacteria through real-time polymerase chain reaction (RT-PCR) revealed that these additional signal molecules affect nitrifying to total bacteria ratio. In addition, the running state of the system was stable during 15days of operation without an AHL dose, which suggests that the changes in the system due to AHL are irreversible.
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Affiliation(s)
- Huizhi Hu
- School of Municipal and Environmental Engineering, Harbin Institute of Technology, 73 Huanghe Road, Harbin, China
| | - Junguo He
- School of Municipal and Environmental Engineering, Harbin Institute of Technology, 73 Huanghe Road, Harbin, China.
| | - Jian Liu
- Central and Southern China Municipal Engineering Design and Research Institute Co., Ltd., 41 Jiefang Park Road, Wuhan, China
| | - Huarong Yu
- School of Municipal and Environmental Engineering, Harbin Institute of Technology, 73 Huanghe Road, Harbin, China
| | - Jie Zhang
- School of Municipal and Environmental Engineering, Harbin Institute of Technology, 73 Huanghe Road, Harbin, China
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Xu Q, Guo J, Niu C, Hou Z, Zhang H, Lian J, Guo Y. Preparation characteristics and accelerating denitrification effectiveness of polyamide 6 modified by AQS. BIOTECHNOL BIOTEC EQ 2015. [DOI: 10.1080/13102818.2015.1063453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Nguyen DD, Ngo HH, Kim SD, Yoon YS. A specific pilot-scale membrane hybrid treatment system for municipal wastewater treatment. BIORESOURCE TECHNOLOGY 2014; 169:52-61. [PMID: 25033324 DOI: 10.1016/j.biortech.2014.06.087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 06/23/2014] [Accepted: 06/24/2014] [Indexed: 06/03/2023]
Abstract
A specifically designed pilot-scale hybrid wastewater treatment system integrating an innovative equalizing reactor (EQ), rotating hanging media bioreactor (RHMBR) and submerged flat sheet membrane bioreactor (SMBR) was evaluated for its effectiveness in practical, long-term, real-world applications. The pilot system was operated at a constant flux, but with different internal recycle flow rates (Q) over a long-term operating of 475 days. At 4 Q internal recycle flow rate, BOD5, CODCr, NH4(+)-N, T-N, T-P and TSS was highly removed with efficiencies up to 99.88 ± 0.05%, 95.01 ± 1.62%, 100%, 90.42 ± 2.43%, 73.44 ± 6.03%, and 99.93 ± 0.28%, respectively. Furthermore, the effluent quality was also superior in terms of turbidity (<1 NTU), color (<15 TCU) and taste (inoffensive). The results indicated that with providing only chemically cleaned-in-place (CIP) during the entire period of operation, the membrane could continuously maintain a constant permeate flux of 22.77 ± 2.19 L/m(2)h. In addition, the power consumption was also found to be reasonably low (0.92-1.62 k Wh/m(3)).
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Affiliation(s)
- Dinh Duc Nguyen
- Department of Chemical Engineering, Dankook University, 448-701, South Korea; Ho Chi Minh City University of Natural Resources and Environment, Ho Chi Minh City, Viet Nam
| | - Huu Hao Ngo
- School of Civil and Environmental Engineering, University of Technology, Broadway, Sydney, NSW 2007, Australia
| | - Sa Dong Kim
- Department of Chemical Engineering, Dankook University, 448-701, South Korea
| | - Yong Soo Yoon
- Department of Chemical Engineering, Dankook University, 448-701, South Korea.
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A novel modification of poly(ethylene terephthalate) fiber using anthraquinone-2-sulfonate for accelerating azo dyes and nitroaromatics removal. Sep Purif Technol 2014. [DOI: 10.1016/j.seppur.2014.05.042] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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