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New LED photoreactor with modulated UV-vis light source for efficient degradation of toluene over WO3/TiO2 photocatalyst. Chem Eng Res Des 2023. [DOI: 10.1016/j.cherd.2023.03.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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2
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Zhang Y, Tong Y, Wang K, Liang Q, Liu J, Zhang X, Ji X, Gao J, Zuo P, Dan M. Application of loofah and insects in a bio-trickling filter to relieve clogging. CHEMOSPHERE 2023; 317:137912. [PMID: 36681198 DOI: 10.1016/j.chemosphere.2023.137912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 01/16/2023] [Accepted: 01/17/2023] [Indexed: 06/17/2023]
Abstract
Bio-trickling filters (BTFs) use an inert filler to purify pollutants making them prone to clogging due to bacterial accumulation. To investigate the performance of a non-inert filler in BTF and its cooperation with insects to relieve clogging, a vertical BTF was constructed with a loofah/Pall ring/polydimethylsiloxane composite filler and selected bacteria to purify toluene. The BTF was started up within 17 d and restarted within 3 d after starvation for 12-16 d. Its average removal efficiency was >90% at steady state. The maximum elimination capacity of 86.4 g·(m3·h)-1 was obtained at a volume capacity of 96.2 g·(m3·h)-1. The introduction of holometabolous insects (Clogmia albipunctata) rapidly removed the biofilm and accelerated the degradation of the loofah, which alleviated clogging. Furthermore, confocal laser scanning microscope (CLSM) observations showed that the biofilm polysaccharides were difficult to remove, while lipids were readily lost. Analysis of microbial diversity over time and space revealed that the dominant bacterium, Comamonas, was replaced by diverse microflora with no obvious dominant genus. Insect introduction and loofah migration had little effect on the evolution of microflora. This study provides a promising approach to operating BTFs with less clogging.
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Affiliation(s)
- Yun Zhang
- Institute of Energy and Environmental Protection, Academy of Agricultural Planning & Engineering, Ministry of Agriculture and Rural Affairs, Beijing, 100125, China
| | - Yali Tong
- Centre of Air Pollution Control and Carbon Neutrality, Institute of Urban Safety and Environmental Science, Beijing Academy of Science and Technology, Beijing, 100054, China
| | - Kun Wang
- Centre of Air Pollution Control and Carbon Neutrality, Institute of Urban Safety and Environmental Science, Beijing Academy of Science and Technology, Beijing, 100054, China
| | - Quanming Liang
- Centre of Air Pollution Control and Carbon Neutrality, Institute of Urban Safety and Environmental Science, Beijing Academy of Science and Technology, Beijing, 100054, China
| | - Jieyu Liu
- Centre of Air Pollution Control and Carbon Neutrality, Institute of Urban Safety and Environmental Science, Beijing Academy of Science and Technology, Beijing, 100054, China
| | - Xiaoxi Zhang
- Centre of Air Pollution Control and Carbon Neutrality, Institute of Urban Safety and Environmental Science, Beijing Academy of Science and Technology, Beijing, 100054, China
| | - Xiaohui Ji
- Centre of Air Pollution Control and Carbon Neutrality, Institute of Urban Safety and Environmental Science, Beijing Academy of Science and Technology, Beijing, 100054, China
| | - Jiajia Gao
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
| | - Penglai Zuo
- Centre of Air Pollution Control and Carbon Neutrality, Institute of Urban Safety and Environmental Science, Beijing Academy of Science and Technology, Beijing, 100054, China.
| | - Mo Dan
- Centre of Air Pollution Control and Carbon Neutrality, Institute of Urban Safety and Environmental Science, Beijing Academy of Science and Technology, Beijing, 100054, China
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Rodrigues CSD, Guimarães V, Pereira MFR, Soares OSGP, Madeira LM. Gaseous toluene abatement by the heterogeneous Fenton-like process using iron/carbon-coated monolith as catalyst: Proof of concept. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 322:116084. [PMID: 36067669 DOI: 10.1016/j.jenvman.2022.116084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 08/09/2022] [Accepted: 08/20/2022] [Indexed: 06/15/2023]
Abstract
The degradation of toluene from a gas stream by the heterogeneous Fenton process was evaluated over a carbon-coated monolith impregnated or not with iron as catalyst in a bubble column reactor (BCR). The carbon-coated monolith support (CM) was prepared by chemical vapor deposition and the catalyst (CM impregnated with iron - herein called CM-Fe) by adsorption. In the screening of processes (absorption, adsorption and reaction), it was shown that the heterogeneous Fenton process catalyzed by CM-Fe presents the best efficiency (toluene transfer (η) = 10 × 10-3 mol, for 300 mL of liquid solution and 0.69 g of catalyst). Finally, the stability of CM and CM-Fe was evaluated, wherein ten consecutive runs were carried out, the results showing a considerable deactivation of CM during the first five cycles. In contrast, the CM-Fe sample only slightly decreases its activity from the 1st to 2nd cycle (due to a small amount of iron leached from the monolith, 0.7%), remaining stable after that, which is important for applying this technology at the industrial level. This work showed for the first time that the treatment of gaseous effluents containing organic compounds by the Fenton process (which takes place in the liquid phase) using a carbon-coated monolith impregnated with iron is plausible, so the proof of concept was successfully accomplished.
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Affiliation(s)
- Carmen S D Rodrigues
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.
| | - Vanessa Guimarães
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal; LSRE - LCM - Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - M Fernando R Pereira
- ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal; LSRE - LCM - Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - O S G P Soares
- ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal; LSRE - LCM - Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Luis M Madeira
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.
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Dewidar AA, Sorial GA. Effect of rhamnolipids on the fungal elimination of toluene vapor in a biotrickling filter under stressed operational conditions. ENVIRONMENTAL RESEARCH 2022; 204:111973. [PMID: 34464615 DOI: 10.1016/j.envres.2021.111973] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 08/04/2021] [Accepted: 08/24/2021] [Indexed: 06/13/2023]
Abstract
The application of rhamnolipids in a fungal-cultured biotrickling filter (BTF) has a significant impact on toluene removal. Two BTFs were used; BTF-A, a control bed, and BTF-B fed with rhamnolipids. The effect of empty bed residence times (EBRTs) on toluene bioavailability was investigated. Removal of toluene was carried out at EBRTs of 30 and 60 s and inlet loading rates (LRs) of 23-184 g m-3 h-1. At 30 s EBRT, when inlet LR was increased from 23 to 184 g m-3 h-1, the removal efficiency (RE) decreased from 93% to 50% for the control bed, and from 94% to 87% for BTF-B. Increasing the EBRT simultaneously with inlet LRs, confirms that BTF-A was diffusion-limited by registering a RE of 62% for toluene inlet LR of 184 g m-3 h-1, whereas BTF-B, achieved RE > 96%, confirming a significant improvement in toluene biodegradability. Overall, the best performance was observed at 60 s EBRT and inlet LR of 184 g m-3 h-1, providing a maximum elimination capacity (EC) of 176.8 g m-3 h-1 under steady-state conditions. While a maximum EC of 114 g m-3 h-1 was observed under the same conditions in the absence of rhamnolipids (BTF-A). Measurements of critical micelle concentration showed that 150 mg L-1 of rhamnolipids demonstrated the lowest aqueous surface tension and maximum formation of micelles, while 175 mg L-1 was the optimum dose for fungal growth. Production rate of carbon dioxide, and dissolved oxygen contents highlighted the positive influence of rhamnolipids on adhesive forces, improved toluene mineralization, and promotion of microbial motility over mobility.
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Affiliation(s)
- Assem A Dewidar
- Department of Chemical and Environmental Engineering, College of Engineering and Applied Science, University of Cincinnati, Cincinnati, OH, USA
| | - George A Sorial
- Department of Chemical and Environmental Engineering, College of Engineering and Applied Science, University of Cincinnati, Cincinnati, OH, USA.
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Wongbunmak A, Panthongkham Y, Suphantharika M, Pongtharangkul T. A fixed-film bioscrubber of Microbacterium esteraromaticum SBS1-7 for toluene/styrene biodegradation. JOURNAL OF HAZARDOUS MATERIALS 2021; 418:126287. [PMID: 34126384 DOI: 10.1016/j.jhazmat.2021.126287] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 04/22/2021] [Accepted: 05/30/2021] [Indexed: 06/12/2023]
Abstract
In the present study, a fixed-film bioscrubber (FFBS) of BTEX-degrading bacterium Microbacterium esteraromaticum SBS1-7 with 'AQUAPOROUSGEL® or APG' supporting material was continuously fed with toluene- or styrene-contaminated gas stream for 172 days. Response Surface Methodology (RSM) was used to optimize the biofilm formation on APG as well as the toluene biodegradation in mineral salt medium (MM). The results suggested that 1000 ppm of yeast extract (YE) was necessary for biofilm formation of SBS1-7. The optimized combination of YE and toluene concentration exhibiting the highest biofilm formation and toluene removal was further employed in an up-scale FFBS operation. The maximum Elimination Capacity (ECmax) of 203 g·m-3·h-1 was obtained at the toluene Inlet Loading Rate (ILR) of 295 g·m-3·h-1. FFBS of SBS1-7 was able to withstand a 5-day shutdown and required only 24 h to recover. Moreover, when the inlet Volatile Organic Compound was shifted to styrene, FFBS required only 24 h for adaptation and the system was able to efficiently remove ~95% of styrene after that. Finally, the performance of the bioscrubber when operated in 2 different modes of operation (FFBS vs Biotricking Filter or BTF) were compared. This study evidently demonstrated the robustness and stability of FFBS with M. esteraromaticum SBS1-7.
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Affiliation(s)
- Akanit Wongbunmak
- Department of Biotechnology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Yanisa Panthongkham
- Department of Biotechnology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Manop Suphantharika
- Department of Biotechnology, Faculty of Science, Mahidol University, Bangkok, Thailand
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Zhang Y, Liu J, Li J, Yue T. Effects of filler voidage on pressure drop and microbial community evolution in fungal bio-trickling filters. CHEMOSPHERE 2021; 273:129710. [PMID: 33524753 DOI: 10.1016/j.chemosphere.2021.129710] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 12/18/2020] [Accepted: 01/17/2021] [Indexed: 06/12/2023]
Abstract
Bio-trickling filters (BTFs) can be used to remediate pollution by volatile organic compounds such as toluene. To investigate the effect of filler voidage on pressure drop (△P), two parallel BTFs were constructed using ceramsite with different voidages (47.5% for BTF1 and 55% for BTF2) and inoculated with Fusarium fungus to purify toluene. Commutation and stagnation operations were explored as ways to relieve △P. In BTF1, commutation temporarily relieved △P and maintained it for 7 days. Implementing stagnation on the 178th day for 69 days effectively reduced the △P from 720 Pa/m to below 20 Pa/m, which was maintained for 36 days. Compared with BTF1, the filler in BTF2 effectively delayed the increase in △P for 70 days or more and ensured stable operation for as long as 174 days. High-throughput sequencing revealed that Fusarium was mainly replaced by Protoctista, Fronsecaea and other fungi in both BTFs, although there were significant differences in their microbial communities. The influences of commutation and stagnation operations on fungal evolution were more obvious in BTF2, in relation to both time and space. The results provide guidance for designing better BTFs to treat hazardous pollutants.
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Affiliation(s)
- Yun Zhang
- Key Laboratory of Beijing on Regional Air Pollution Control, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China; Beijing Municipal Institute of Labour Protection, Beijing, 100054, China
| | - Jia Liu
- Key Laboratory of Beijing on Regional Air Pollution Control, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
| | - Jian Li
- Key Laboratory of Beijing on Regional Air Pollution Control, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China.
| | - Tao Yue
- Beijing Municipal Institute of Labour Protection, Beijing, 100054, China.
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Lusinier N, Couriol C, Cloirec PL. Proposed mechanisms of toluene removal by vermicompost and earthworms Eisenia fetida. ENVIRONMENTAL TECHNOLOGY 2020; 41:3023-3031. [PMID: 30874480 DOI: 10.1080/09593330.2019.1595164] [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: 10/29/2018] [Accepted: 03/07/2019] [Indexed: 06/09/2023]
Abstract
For potential use in air treatment by biofiltration, a new material composed of vermicompost and earthworms (Eisenia fetida) was tested for the removal of a volatile organic compound (VOC), toluene. The removal rate of toluene was measured during batch experiments in presence of vermicompost only, earthworms only and a mixture of both. In the chosen experimental conditions, no mortality of earthworms was recorded and the results showed that the presence of earthworms allowed an increase in toluene removal rate (0.213 mg h-1) compared to vermicompost only (0.084 mg h-1) and earthworms only (0.136 mg h-1). From the experimental data, mechanisms of toluene transfer and adsorption/biodegradation by microorganisms from vermicompost and/or earthworms were proposed.
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Affiliation(s)
- Nicolas Lusinier
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, Rennes Cedex 7, France
| | | | - Pierre Le Cloirec
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, Rennes Cedex 7, France
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Qin C, Guo H, Bai W, Huang J, Huang X, Dang X, Yan D. Kinetics study on non-thermal plasma mineralization of adsorbed toluene over γ-Al2O3 hybrid with zeolite. JOURNAL OF HAZARDOUS MATERIALS 2019; 369:430-438. [PMID: 30784973 DOI: 10.1016/j.jhazmat.2019.01.098] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Revised: 01/17/2019] [Accepted: 01/29/2019] [Indexed: 06/09/2023]
Abstract
Non-thermal plasma mineralization of the adsorbed toluene over γ-Al2O3 hybrid with 13X, ZSM-5, and HY was investigated in a sequential adsorption and plasma oxidation system. The γ-Al2O3-13X was shown to have a better plasma oxidation performance with fewer by-products as compared to γ-Al2O3-ZSM-5 and γ-Al2O3-HY, which was due to its better discharge performance and O3 decomposition ability. For all of the tested materials, the plasma mineralization of the adsorbed toluene process had a good match with the pseudo-second-order kinetic model: kt = 1/n - 1/no, where n0 and n are the amount of adsorbed toluene (mmol) at discharge time = 0 and t, respectively. The overall reaction constant (k) was shown to be affected by the packing materials. The reason for the kinetic model following the pseudo-second-order in the sequential process was analyzed based on the chemical reaction and mineralization mechanism.
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Affiliation(s)
- Caihong Qin
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an, 710055, China
| | - Hui Guo
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an, 710055, China
| | - Wenwen Bai
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an, 710055, China
| | - Jiayu Huang
- Research Center of Air Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Xuemin Huang
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an, 710055, China
| | - Xiaoqing Dang
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an, 710055, China.
| | - Dongjie Yan
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an, 710055, China
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Biodegradation of gaseous toluene with mixed microbial consortium in a biofilter: steady state and transient operation. Bioprocess Biosyst Eng 2017; 40:1801-1812. [DOI: 10.1007/s00449-017-1834-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 08/23/2017] [Indexed: 10/18/2022]
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