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Aydin S, Can K, Çalışkan M, Balcazar JL. Bacteriophage cocktail as a promising bio-enhancer for methanogenic activities in anaerobic membrane bioreactors. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 832:154716. [PMID: 35337865 DOI: 10.1016/j.scitotenv.2022.154716] [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: 01/29/2022] [Revised: 03/16/2022] [Accepted: 03/17/2022] [Indexed: 06/14/2023]
Abstract
This study aimed to explore the effect of a bacteriophage cocktail, pyophage, on the treatment of wastewater containing antibiotics in an anaerobic membrane bioreactor (AnMBR). During the operational period, performance of the AnMBR was monitored through the changes in chemical oxygen demand (COD), antibiotic removal, transmembrane pressure, and biogas production. Microbial community structure and composition, as well as the occurrence of antibiotic resistance genes were analyzed through shotgun metagenomics analysis. When exposed to pyophage, COD removal efficiency was enhanced up to 96%, whereas membrane fouling was delayed by 25%. Average biogas production was doubled from 224.2 mL/d in control with antibiotics to 447.3 mL/d when exposed to pyophage cocktail with considerable alterations to the archaeal and bacterial community structures. Most notably, the methanogenic community shifted from dominance of Methanothermobacter to Methanoculleus, along with syntrophic bacteria. The results provide insight into the synergistic effects of phage-bacteria and methanogenic communities and illustrate the potential of bacteriophages as bio-enhancers.
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Affiliation(s)
- Sevcan Aydin
- Division of Biotechnology, Biology Department, Faculty of Science, Istanbul University, Vezneciler, 34134 Istanbul, Turkey.
| | - Kubra Can
- Department of Medical Microbiology, Istanbul University-Cerrahpasa, Cerrahpaşa, 34320 Istanbul, Turkey
| | - Mahmut Çalışkan
- Division of Biotechnology, Biology Department, Faculty of Science, Istanbul University, Vezneciler, 34134 Istanbul, Turkey
| | - Jose L Balcazar
- Catalan Institute for Water Research (ICRA), 17003 Girona, Spain; University of Girona, 17004 Girona, Spain
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Untapped Potential of Moving Bed Biofilm Reactors with Different Biocarrier Types for Bilge Water Treatment: A Laboratory-Scale Study. WATER 2021. [DOI: 10.3390/w13131810] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Two labscale aerobic moving bed biofilm reactor (MBBR) systems, with a different type of biocarrier in each (K3 and Mutag BioChip), were operated in parallel for the treatment of real saline bilge water. During the operation, different stress conditions were applied in order to evaluate the performance of the systems: organic/hydraulic load shock (chemical oxygen demand (COD): 9 g L−1; hydraulic retention time (HRT): 48–72 h) and salinity shock (salinity: 40 ppt). At the same time, the microbiome in the biofilm and suspended biomass was monitored through 16S rRNA gene analysis in order to describe the changes in the microbial community. The dominant classes were Alphaproteobacteria (families Rhodospirillaceae and Rhodobacteraceae) and Bacteroidia (family Lentimicrobiaceae), being recorded at high relative abundance in all MBBRs. The structure of the biofilm was examined and visualized with scanning electron microscopy (SEM) analysis. Both systems exhibited competent performance, reaching up to 86% removal of COD under high organic loading conditions (COD: 9 g L−1). In the system in which K3 biocarriers were used, the attached and suspended biomass demonstrated a similar trend regarding the changes observed in the microbial communities. In the bioreactor filled with K3 biocarriers, higher concentration of biomass was observed. Biofilm developed on Mutag BioChip biocarriers presented lower biodiversity, while the few species identified in the raw wastewater were not dominant in the bioreactors. Through energy-dispersive X-ray (EDX) analysis of the biofilm, the presence of calcium carbonate was discovered, indicating that biomineralization occurred.
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Kaur R, Kaur A, Kaur R, Singh S, Bhatti MS, Umar A, Baskoutas S, Kansal SK. Cu-BTC metal organic framework (MOF) derived Cu-doped TiO2 nanoparticles and their use as visible light active photocatalyst for the decomposition of ofloxacin (OFX) antibiotic and antibacterial activity. ADV POWDER TECHNOL 2021. [DOI: 10.1016/j.apt.2021.02.037] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Topcu Ş, Taşkan E. Effect of the tetracycline antibiotics on performance and microbial community of microbial fuel cell. Bioprocess Biosyst Eng 2020; 44:595-605. [PMID: 33180189 DOI: 10.1007/s00449-020-02473-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 10/24/2020] [Indexed: 11/29/2022]
Abstract
The adverse effect of tetracycline antibiotics on microbial activity is one of the serious risks for the biologic wastewater treatment process. The microbial fuel cells (MFCs) are a promising technology for wastewater treatment and renewable power generation process. For this reason, the investigation of the inhibition effect of the tetracyclines on the MFCs is essential for reducing damage on the environment. This paper focused on the performance of MFCs under different antibiotic concentrations at the range of 0.25-50 mg/L. The power generation performance, microbial community and biofilm characteristics (morphology, resistance and viability) of MFCs were investigated in detail. The results indicated that the increase in the antibiotic concentration significantly affected the MFC performance and microbial community. A modified non-competitive inhibition model was used to predict the inhibition effect of tetracycline antibiotics on the MFCs.
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Affiliation(s)
- Şeyho Topcu
- Faculty of Engineering, Department of Environmental Engineering, Firat University, 23119, Elazig, Turkey
| | - Ergin Taşkan
- Faculty of Engineering, Department of Environmental Engineering, Firat University, 23119, Elazig, Turkey.
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Taşkan B, Casey E, Hasar H. Simultaneous oxidation of ammonium and tetracycline in a membrane aerated biofilm reactor. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 682:553-560. [PMID: 31128369 DOI: 10.1016/j.scitotenv.2019.05.111] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 05/08/2019] [Accepted: 05/08/2019] [Indexed: 06/09/2023]
Abstract
The membrane aerated biofilms reactor (MABR) is an emerging technology in wastewater treatment with particular advantages including high rate nitrification, and very high oxygen transfer efficiencies. In this study a synthetic feed water incorporating tetracycline (TC) was investigated in a MABR. Simultaneous removal of ammonium and tetracycline (TC) in the reactor, formation of TC transformation products (TPs), and microbial community analysis in the biofilm growing on the membrane were performed. A range of TC and ammonium loading rates and the effect of different intra-membrane oxygen pressures were on treatment performance were systematically investigated. Successful nitrification and TC degradation were achieved with the highest TC removal (63%) obtained at a HRT of 18 h HRT and 0.41 bar gas pressure. It has shown that different operating conditions (HRT and gas pressure) do not cause a significant change in ammonium removal. The concentration of TPs such as ETC, EATC, and ATC was determined to be at the ppb level. Molecular results showed that MABR reactor was mainly dominated by β-proteobacteria. The relative abundance of this group decreased in parallel with the increasing ammonium and TC loading.
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Affiliation(s)
- Banu Taşkan
- Firat University, Faculty of Engineering, Dept of Environmental Engineering, 23119-Elazığ, Turkey.
| | - Eoin Casey
- University College Dublin, School of Chemical & Bioprocess Engineering, Dublin, Ireland
| | - Halil Hasar
- Firat University, Faculty of Engineering, Dept of Environmental Engineering, 23119-Elazığ, Turkey
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Kaur A, Umar A, Anderson WA, Kansal SK. Facile synthesis of CdS/TiO2 nanocomposite and their catalytic activity for ofloxacin degradation under visible illumination. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.04.021] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Yangin-Gomec C, Pekyavas G, Sapmaz T, Aydin S, Ince B, Akyol Ç, Ince O. Microbial monitoring of ammonia removal in a UASB reactor treating pre-digested chicken manure with anaerobic granular inoculum. BIORESOURCE TECHNOLOGY 2017; 241:332-339. [PMID: 28577482 DOI: 10.1016/j.biortech.2017.05.070] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 05/09/2017] [Accepted: 05/12/2017] [Indexed: 06/07/2023]
Abstract
Performance and microbial community dynamics in an upflow anaerobic sludge bed (UASB) reactor coupled with anaerobic ammonium oxidizing (Anammox) treating diluted chicken manure digestate (Total ammonia nitrogen; TAN=123±10mg/L) were investigated for a 120-d operating period in the presence of anaerobic granular inoculum. Maximum TAN removal efficiency reached to above 80% with as low as 20mg/L TAN concentrations in the effluent. Moreover, total COD (tCOD) with 807±215mg/L in the influent was removed by 60-80%. High-throughput sequencing revealed that Proteobacteria, Actinobacteria, and Firmicutes were dominant phyla followed by Euryarchaeota and Bacteroidetes. The relative abundance of Planctomycetes significantly increased from 4% to 8-9% during the late days of the operation with decreased tCOD concentration, which indicated a more optimum condition to favor ammonia removal through anammox route. There was also significant association between the hzsA gene and ammonia removal in the UASB reactor.
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Affiliation(s)
- Cigdem Yangin-Gomec
- Istanbul Technical University, Department of Environmental Engineering, Maslak, 34469 Istanbul, Turkey.
| | - Goksen Pekyavas
- Istanbul Technical University, Department of Environmental Engineering, Maslak, 34469 Istanbul, Turkey
| | - Tugba Sapmaz
- Istanbul Technical University, Department of Environmental Engineering, Maslak, 34469 Istanbul, Turkey
| | - Sevcan Aydin
- BioCore Biotechnology Environmental and Energy Technologies R&D Ltd., Istanbul 34217, Turkey
| | - Bahar Ince
- Boğaziçi University, Institute of Environmental Sciences, Bebek, 34342 Istanbul, Turkey
| | - Çağrı Akyol
- Boğaziçi University, Institute of Environmental Sciences, Bebek, 34342 Istanbul, Turkey
| | - Orhan Ince
- Istanbul Technical University, Department of Environmental Engineering, Maslak, 34469 Istanbul, Turkey
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Kaur A, Salunke DB, Umar A, Mehta SK, Sinha ASK, Kansal SK. Visible light driven photocatalytic degradation of fluoroquinolone levofloxacin drug using Ag2O/TiO2 quantum dots: a mechanistic study and degradation pathway. NEW J CHEM 2017. [DOI: 10.1039/c7nj02053h] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ag2O/TiO2 QDs exhibited a photocatalytic activity of 81% for the degradation of levofloxacin under visible light, which is higher than those of commercially available catalysts.
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Affiliation(s)
- Amandeep Kaur
- Dr. S. S. Bhatnagar University Institute of Chemical Engineering & Technology
- Panjab University
- Chandigarh-160014
- India
| | | | - Ahmad Umar
- Department of Chemistry
- Faculty of Science and Arts and Promising Centre for Sensors and Electronic Devices (PCSED)
- Najran University
- Najran-11001
- Kingdom of Saudi Arabia
| | | | - A. S. K. Sinha
- Department of Chemical Engineering and Technology
- Indian Institute of Technology (Banaras Hindu University)
- Varanasi 221005
- India
| | - Sushil Kumar Kansal
- Dr. S. S. Bhatnagar University Institute of Chemical Engineering & Technology
- Panjab University
- Chandigarh-160014
- India
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