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Behrouzeh M, Mehdi Parivazh M, Danesh E, Javad Dianat M, Abbasi M, Osfouri S, Rostami A, Sillanpää M, Dibaj M, Akrami M. Application of Photo-Fenton, Electro-Fenton, and Photo-Electro-Fenton processes for the treatment of DMSO and DMAC wastewaters. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Wang L, Guo X, Ye Q, Qi J, Li P, Yan F. Boosting H 2O 2 Activation for the Efficient Degradation of Dimethyl Sulfoxide-Containing Wastewater over Supported Niobia Catalysts. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lidong Wang
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding071003, China
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing102206, China
| | - Xiaohan Guo
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding071003, China
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing102206, China
| | - Qingying Ye
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding071003, China
| | - Juanjuan Qi
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding071003, China
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing102206, China
| | - Ping Li
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding071003, China
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing102206, China
| | - Fei Yan
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding071003, China
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing102206, China
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Yan F, Guo X, Ye Q, Li P, Qi J, Wang L. Removal of volatile dimethyl sulfoxide from wastewater using hydrogen peroxide catalyzed by supported molybdenum oxide. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Li B, Chen D, Lin F, Wu C, Cao L, Chen H, Hu Y, Yin Y. Genomic Island-Mediated Horizontal Transfer of the Erythromycin Resistance Gene erm(X) among Bifidobacteria. Appl Environ Microbiol 2022; 88:e0041022. [PMID: 35477272 PMCID: PMC9128502 DOI: 10.1128/aem.00410-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 04/02/2022] [Indexed: 01/20/2023] Open
Abstract
Antibiotic resistance is a serious medical issue driven by antibiotic misuse. Bifidobacteria may serve as a reservoir for antibiotic resistance genes (ARGs) that have the potential risk of transfer to pathogens. The erythromycin resistance gene erm(X) is an ARG with high abundance in bifidobacteria, especially in Bifidobacterium longum species. However, the characteristics of the spread and integration of the gene erm(X) into the bifidobacteria genome are poorly understood. In this study, 10 tetW-positive bifidobacterial strains and 1 erm(X)-positive bifidobacterial strain were used to investigate the transfer of ARGs. Conjugation assays found that the erm(X) gene could transfer to five other bifidobacterial strains. Dimethyl sulfoxide (DMSO) and vorinostat significantly promoted the transfer of the erm(X) from strain Bifidobacterium catenulatum subsp. kashiwanohense DSM 21854 to Bifidobacterium longum subsp. suis DSM 20211. Whole-genome sequencing and comparative genomic analysis revealed that the erm(X) gene was located on the genomic island BKGI1 and that BKGI1 was conjugally mobile and transferable. To our knowledge, this is the first report that a genomic island-mediated gene erm(X) transfer in bifidobacteria. Additionally, BKGI1 is very unstable in B. catenulatum subsp. kashiwanohense DSM 21854 and transconjugant D2TC and is highly excisable and has an intermediate circular formation. In silico analysis showed that the BKGI1 homologs were also present in other bifidobacterial strains and were especially abundant in B. longum strains. Thus, our results confirmed that genomic island BKGI1 was one of the vehicles for erm(X) spread. These findings suggest that genomic islands play an important role in the dissemination of the gene erm(X) among Bifidobacterium species. IMPORTANCE Bifidobacteria are a very important group of gut microbiota, and the presence of these bacteria has many beneficial effects for the host. Thus, bifidobacteria have attracted growing interest owing to their potential probiotic properties. Bifidobacteria have been widely exploited by the food industry as probiotic microorganisms, and some species have a long history of safe use in food and feed production. However, the presence of antibiotic resistance raises the risk of its application. In this study, we analyzed the transfer of the erythromycin resistance gene erm(X) and revealed that the molecular mechanism behind the spread of the gene erm(X) was mediated by genomic island BKGI1. To the best of our knowledge this is the first report to describe the transfer of the gene erm(X) via genomic islands among bifidobacteria. This may be an important way to disseminate the gene erm(X) among bifidobacteria.
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Affiliation(s)
- Baiyuan Li
- Key Laboratory of Comprehensive Utilization of Advantage Plant Resources in Hunan South, College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou, Hunan, China
| | - Dan Chen
- Key Laboratory of Comprehensive Utilization of Advantage Plant Resources in Hunan South, College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou, Hunan, China
| | - Fan Lin
- Key Laboratory of Comprehensive Utilization of Advantage Plant Resources in Hunan South, College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou, Hunan, China
| | - Chuanyu Wu
- Key Laboratory of Comprehensive Utilization of Advantage Plant Resources in Hunan South, College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou, Hunan, China
| | - Linyan Cao
- Key Laboratory of Comprehensive Utilization of Advantage Plant Resources in Hunan South, College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou, Hunan, China
| | - Huahai Chen
- Key Laboratory of Comprehensive Utilization of Advantage Plant Resources in Hunan South, College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou, Hunan, China
| | - Yunfei Hu
- Key Laboratory of Comprehensive Utilization of Advantage Plant Resources in Hunan South, College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou, Hunan, China
| | - Yeshi Yin
- Key Laboratory of Comprehensive Utilization of Advantage Plant Resources in Hunan South, College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou, Hunan, China
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Zhang Y, Chong JY, Xu R, Wang R. Effective separation of water-DMSO through solvent resistant membrane distillation (SR-MD). WATER RESEARCH 2021; 197:117103. [PMID: 33848849 DOI: 10.1016/j.watres.2021.117103] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 02/20/2021] [Accepted: 03/29/2021] [Indexed: 06/12/2023]
Abstract
The treatment of organic waste or wastewater with high organic solvent content has been challenging in industries as it cannot be done effectively using conventional wastewater treatment technologies such as biodegradation and advanced oxidation process. Solvent resistant membrane distillation (SR-MD) was proposed as an energy-efficient alternative to treat these waste streams but its application is hampered by the lack of solvent-resistant membranes, and there is a research gap in studying the feeds with water-solvent mixtures. In this work, ceramic tubular membranes with different pore sizes and structures were molecularly grafted with 1H,1H,2H,2H-perfluorodecyltriethoxysilane to obtain hydrophobic ceramic membranes for SR-MD. The modified membranes exhibited excellent hydrophobicity and solvent resistant properties, and they were tested for SR-MD performance with a wide range of dimethyl sulfoxide (DMSO) feed concentrations, from 3.5 to 85 wt%. The membranes exhibited a high DMSO rejection of >98% and the separation factor of >170, with permeation flux >4.4 kg m-2 h-1 when the DMSO concentration in feed was below 65 wt%. The separation performance was found strongly dependent on the evaporation step and the vapour-liquid equilibrium near the interface. The DMSO rejection was also comparable to pervaporation while the permeation flux was much higher at the feed concentration of 50 wt%. This study establishes the strategy of using SR-MD as a promising membrane process in treating complex industrial wastes with high organic solvent content.
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Affiliation(s)
- Yujun Zhang
- Interdisciplinary Graduate Programme, Graduate College, Nanyang Technological University, Singapore 637553, Singapore; Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Jeng Yi Chong
- Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore
| | - Rong Xu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore
| | - Rong Wang
- Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore.
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Cheng HH, Liu CB, Lei YY, Chiu YC, Mangalindan J, Wu CH, Wu YJ, Whang LM. Biological treatment of DMSO-containing wastewater from semiconductor industry under aerobic and methanogenic conditions. CHEMOSPHERE 2019; 236:124291. [PMID: 31319306 DOI: 10.1016/j.chemosphere.2019.07.022] [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: 02/28/2019] [Revised: 06/16/2019] [Accepted: 07/02/2019] [Indexed: 06/10/2023]
Abstract
This study evaluated biological treatment of dimethyl sulfoxide (DMSO)-containing wastewater from semiconductor industry under aerobic and anaerobic conditions. DMSO concentration as higher as 1.5 g/L did not inhibit DMSO degradation efficiency in aerobic membrane bioreactor (MBR), while specific DMSO degradation rate at different initial DMSO-to-biomass (S0/X0) ratios from batch tests seemed to follow the Haldane-type kinetics. According to the microbial community analysis, Proteobacteria decreased from 88.2% to 26% as influent DMSO concentration increased, while Bacteroidetes, Parcubacteria, Saccharibacteria increased. Within the Bacteroidetes class, Flavobacterium and Laribacter genus significantly increased from less than 0.05%-26.8% and 13.4%, respectively, which might both be related to the DMS degradation. Hyphomicrobium and Thiobacillus, known as aerobic DMSO and DMS degraders, instead, decreased at higher DMSO conditions. Under methanogenic conditions, batch results implied DMSO concentrations higher than 3 g/L could be inhibitory, while DMSO and COD removal achieved 100% and 93%, respectively, using a pilot-scale anaerobic fluidized bed membrane bioreactor (AFMBR) with influent DMSO below 1.5 g/L. Results of terminal restriction fragment length polymorphism (TRFLP) analysis targeting on mcrA functional gene revealed that Methanomethylovorans sp. was dominant in AFMBR after 54 days of operation, indicating its importance on degrading DMS and mathanethiol (MT).
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Affiliation(s)
- Hai-Hsuan Cheng
- Department of Environmental Engineering, National Cheng Kung University, No. 1, University Road, Tainan, 701, Taiwan
| | - Cheng-Bing Liu
- Department of Environmental Engineering, National Cheng Kung University, No. 1, University Road, Tainan, 701, Taiwan
| | - Yuan-Yuan Lei
- Department of Environmental Engineering, National Cheng Kung University, No. 1, University Road, Tainan, 701, Taiwan
| | - Yi-Chu Chiu
- Department of Environmental Engineering, National Cheng Kung University, No. 1, University Road, Tainan, 701, Taiwan
| | - Jasan Mangalindan
- Department of Chemical Engineering and Chemistry, Mapúa Institute of Technology, 658 Muralla St., Intramuros, Manila, 1002, Philippines
| | - Chin-Hwa Wu
- Department of Environmental Engineering, National Cheng Kung University, No. 1, University Road, Tainan, 701, Taiwan
| | - Yi-Ju Wu
- Department of Environmental Engineering, National Cheng Kung University, No. 1, University Road, Tainan, 701, Taiwan
| | - Liang-Ming Whang
- Department of Environmental Engineering, National Cheng Kung University, No. 1, University Road, Tainan, 701, Taiwan; Sustainable Environment Research Center (SERC), National Cheng Kung University, No. 1, University Road, Tainan, 701, Taiwan; Research Center for Energy Technology and Strategy (RCETS), National Cheng Kung University, No. 1, University Road, Tainan, 701, Taiwan.
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He B, Zhu X, Zhao C, Wang G, Ma Y, Yang W. Cytocompatible Fabrication of Yeast Cells/Fabrics Composite Sheet for Bioethanol Production. Macromol Rapid Commun 2018; 39:e1800212. [PMID: 29947153 DOI: 10.1002/marc.201800212] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 05/06/2018] [Indexed: 11/10/2022]
Abstract
Entrapment of living cells into a polymer network has significant potential in various fields such as biomass conversion and tissue engineering. A crucial challenge for this strategy is to provide a mild enough condition to preserve cell viability. Here, a facile and cytocompatible method to entrap living yeast cells into a poly(ethylene glycol) (PEG) network grafting from polypropylene nonwoven fabrics via visible-light-induced surface living graft crosslinking polymerization is reported. Due to the mild reaction conditions and excellent biocompatibility of PEG, the immobilized yeast cells could maintain their viability and proliferate well. The obtained composite sheet has excellent long-term stability and shows no significant efficiency loss after 25 cycles of repeated batch bioethanol fermentation. The immobilized yeast cells exhibit 18.0% higher bioethanol fermentation efficiency than free cells. This strategy for immobilization of living cells with high viability has significant potential application.
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Affiliation(s)
- Bin He
- State Key Laboratory of Chemical Resource Engineering, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Xing Zhu
- State Key Laboratory of Chemical Resource Engineering, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Changwen Zhao
- State Key Laboratory of Chemical Resource Engineering, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Guan Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Yuhong Ma
- Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Wantai Yang
- State Key Laboratory of Chemical Resource Engineering, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100029, China.,Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing, 100029, China.,Beijing Advanced Innovation Centre for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
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Activated sludge-loaded polyvinyl alcohol microparticles for starch wastewater treatment in an airlift bioreactor. KOREAN J CHEM ENG 2017. [DOI: 10.1007/s11814-017-0313-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Analysis of the Metabolites of Indole Degraded by an Isolated Acinetobacter pittii L1. BIOMED RESEARCH INTERNATIONAL 2017; 2017:2564363. [PMID: 29392129 PMCID: PMC5748082 DOI: 10.1155/2017/2564363] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2017] [Accepted: 11/19/2017] [Indexed: 11/18/2022]
Abstract
Indole and its derivatives are typical nitrogen heterocyclic compounds and have been of immense concern since they are known for the risk of their toxic, recalcitrant, and carcinogenic properties for human and ecological environment. In this study, a Gram-negative bacterial strain of eliminating indole was isolated from a coking wastewater. The strain was confirmed as Acinetobacter pittii L1 based on the physiological and biochemical characterization and 16S ribosomal DNA (rDNA) gene sequence homology. 400 mg/L indole could be completely removed within 48 h by the strain on the optimum condition of 37°C, pH 7.4, and 150 rpm. The organic nitrogen was converted to NH3-N and then to NO3- and the organic carbon was partially transferred to CO2 during the indole biodegradation. The metabolic pathways were proposed to explain the indole degradation based on the liquid chromatography tandem mass spectrometry (LC-MS/MS) analysis of indigo, 4-(3-Hydroxy-1H-pyrrol-2-yl)-2-oxo-but-3-enoic acid, and isatin. The toxicity of the biodegradation products was evaluated using the Microtox test, which revealed that the metabolites were more toxic than indole. Our research holds promise for the potential application of Acinetobacter pittii L1 for NHCs degradation, production of indigoids, and soil remediation as well as treatment of indole containing wastewater.
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Production of d-alanine from dl-alanine using immobilized cells of Bacillus subtilis HLZ-68. World J Microbiol Biotechnol 2017; 33:176. [DOI: 10.1007/s11274-017-2341-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 09/08/2017] [Indexed: 12/13/2022]
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Matira EM, Chen TC, Lu MC, Dalida MLP. Degradation of dimethyl sulfoxide through fluidized-bed Fenton process. JOURNAL OF HAZARDOUS MATERIALS 2015; 300:218-226. [PMID: 26188864 DOI: 10.1016/j.jhazmat.2015.06.069] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 06/17/2015] [Accepted: 06/30/2015] [Indexed: 06/04/2023]
Abstract
Dimethyl sulfoxide (DMSO), one of the most widely used solvent, was subjected to fluidized-bed Fenton oxidation in this study. Fenton oxidation is considered one of the cheapest advanced oxidation processes due to high availability of Fenton's reagents Fe(2+) and H2O2, wherein, Fe(2+) catalyzes hydroxyl radical production from H2O2. Fluidized-bed Fenton process is a modified approach which is also used to address the production of large amount of iron oxide sludge in conventional Fenton process. Parametric study is included in this research using initial conditions of pH 2-7, 0.5-7.25 mM Fe(2+), 5-87.5mM H2O2, and 5-50mM DMSO. Fluidized-bed Fenton oxidation of 5mM DMSO using 68.97 g/L SiO2 carrier at initial conditions of pH 3, 5mM Fe(2+), and 32.5mM H2O2 resulted to 95.22% DMSO degradation, 34.38% TOC removal and 0.304 mM sulfate/mM DMSO0 production in 2h. The study shows that the intermediate product which was most difficult to oxidize and contributed most to the residual TOC was methanesulfonate.
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Affiliation(s)
- Emmanuela M Matira
- Department of Chemical Engineering, University of the Philippines Diliman, Quezon City 1101, Philippines
| | - Teng-Chien Chen
- Department of Green Energy Development Center, Feng Chia University, Taichung 40724, Taiwan
| | - Ming-Chun Lu
- Department of Environmental Resources Management, Chia Nan University of Pharmacy and Science, Tainan 717, Taiwan.
| | - Maria Lourdes P Dalida
- Department of Chemical Engineering, University of the Philippines Diliman, Quezon City 1101, Philippines
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Removal of Dimethyl Sulfide from Aqueous Solution Using Cost-Effective Modified Chicken Manure Biochar Produced from Slow Pyrolysis. SUSTAINABILITY 2015. [DOI: 10.3390/su71115057] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Das M, Adholeya A. Potential Uses of Immobilized Bacteria, Fungi, Algae, and Their Aggregates for Treatment of Organic and Inorganic Pollutants in Wastewater. ACS SYMPOSIUM SERIES 2015. [DOI: 10.1021/bk-2015-1206.ch015] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Manab Das
- The Energy and Resources Institute, I H C, Darbari Seth Block, Lodhi Road, New Delhi 110003
| | - Alok Adholeya
- The Energy and Resources Institute, I H C, Darbari Seth Block, Lodhi Road, New Delhi 110003
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Bellotindos LM, Lu MH, Methatham T, Lu MC. Factors affecting degradation of dimethyl sulfoxide (DMSO) by fluidized-bed Fenton process. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:14158-14165. [PMID: 25056747 DOI: 10.1007/s11356-014-3320-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Accepted: 07/09/2014] [Indexed: 06/03/2023]
Abstract
In this study, the target compound is dimethyl sulfoxide (DMSO), which is used as a photoresist stripping solvent in the semiconductor and thin-film transistor liquid crystal display (TFT-LCD) manufacturing processes. The effects of the operating parameters (pH, Fe(2+) and H2O2 concentrations) on the degradation of DMSO in the fluidized-bed Fenton process were examined. This study used the Box-Behnken design (BBD) to investigate the optimum conditions of DMSO degradation. The highest DMSO removal was 98 % for pH 3, when the H2O2 to Fe(2+) molar ratio was 12. At pH 2 and 4, the highest DMSO removal was 82 %, when the H2O2 to Fe(2+) molar ratio was 6.5. The correlation of DMSO removal showed that the effect of the parameters on DMSO removal followed the order Fe(2+) > H2O2 > pH. From the BBD prediction, the optimum conditions were pH 3, 5 mM of Fe(2+), and 60 mM of H2O2. The difference between the experimental value (98 %) and the predicted value (96 %) was not significant. The removal efficiencies of DMSO, chemical oxygen demand (COD), total organic carbon (TOC), and iron in the fluidized-bed Fenton process were higher than those in the traditional Fenton process.
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Guo C, Chen Y, Chen J, Wang X, Zhang G, Wang J, Cui W, Zhang Z. Combined hydrolysis acidification and bio-contact oxidation system with air-lift tubes and activated carbon bioreactor for oilfield wastewater treatment. BIORESOURCE TECHNOLOGY 2014; 169:630-636. [PMID: 25105268 DOI: 10.1016/j.biortech.2014.07.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Revised: 07/03/2014] [Accepted: 07/05/2014] [Indexed: 06/03/2023]
Abstract
This paper investigated the enhancement of the COD reduction of an oilfield wastewater treatment process by installing air-lift tubes and adding an activated carbon bioreactor (ACB) to form a combined hydrolysis acidification and bio-contact oxidation system with air-lift tubes (HA/air-lift BCO) and an ACB. Three heat-resistant bacterial strains were cultivated and subsequently applied in above pilot plant test. Installing air-lift tubes in aerobic tanks reduced the necessary air to water ratio from 20 to 5. Continuous operation of the HA/air-lift BCO system for 2 months with a hydraulic retention time of 36 h, a volumetric load of 0.14 kg COD/(m(3)d) (hydrolysis-acidification or anaerobic tank), and 0.06 kg COD/(m(3)d) (aerobic tanks) achieved an average reduction of COD by 60%, oil and grease by 62%, total suspended solids by 75%, and sulfides by 77%. With a COD load of 0.56 kg/(m(3)d), the average COD in the ACB effluent was 58 mg/L.
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Affiliation(s)
- Chunmei Guo
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Yi Chen
- Department of Environmental and Quality Management, Lanzhou Petrochemical Company, CNPC, Lanzhou 730060, China
| | - Jinfu Chen
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Xiaojun Wang
- Lanzhou Huanqiu Contracting & Engineering Corp. Lanzhou 730060, China
| | - Guangqing Zhang
- School of Mechanical, Materials & Mechatronic Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Jingxiu Wang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Wenfeng Cui
- Department of Environmental and Quality Management, Lanzhou Petrochemical Company, CNPC, Lanzhou 730060, China
| | - Zhongzhi Zhang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China.
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Giri BS, Kim KH, Pandey R, Cho J, Song H, Kim YS. Review of biotreatment techniques for volatile sulfur compounds with an emphasis on dimethyl sulfide. Process Biochem 2014. [DOI: 10.1016/j.procbio.2014.05.024] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Niu X, Wang Z, Li Y, Zhao Z, Liu J, Jiang L, Xu H, Li Z. "Fish-in-net", a novel method for cell immobilization of Zymomonas mobilis. PLoS One 2013; 8:e79569. [PMID: 24236145 PMCID: PMC3827359 DOI: 10.1371/journal.pone.0079569] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Accepted: 09/24/2013] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Inorganic mesoporous materials exhibit good biocompatibility and hydrothermal stability for cell immobilization. However, it is difficult to encapsulate living cells under mild conditions, and new strategies for cell immobilization are needed. We designed a "fish-in-net" approach for encapsulation of enzymes in ordered mesoporous silica under mild conditions. The main objective of this study is to demonstrate the potential of this approach in immobilization of living cells. METHODOLOGY/PRINCIPAL FINDINGS Zymomonas mobilis cells were encapsulated in mesoporous silica-based materials under mild conditions by using a "fish-in-net" approach. During the encapsulation process, polyethyleneglycol was used as an additive to improve the immobilization efficiency. After encapsulation, the pore size, morphology and other features were characterized by various methods, including scanning electron microscopy, nitrogen adsorption-desorption analysis, transmission electron microscopy, fourier transform infrared spectroscopy, and elemental analysis. Furthermore, the capacity of ethanol production by immobilized Zymomonas mobilis and free Zymomonas mobilis was compared. CONCLUSIONS/SIGNIFICANCE In this study, Zymomonas mobilis cells were successfully encapsulated in mesoporous silica-based materials under mild conditions by the "fish-in-net" approach. Encapsulated cells could perform normal metabolism and exhibited excellent reusability. The results presented here illustrate the enormous potential of the "fish-in-net" approach for immobilization of living cells.
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Affiliation(s)
- Xuedun Niu
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, Jilin University, Changchun, Jilin Province, P. R. China
- College of Life Science, Jilin University, Changchun, Jilin Province, P. R. China
| | - Zhi Wang
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, Jilin University, Changchun, Jilin Province, P. R. China
- College of Life Science, Jilin University, Changchun, Jilin Province, P. R. China
| | - Yang Li
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, Jilin University, Changchun, Jilin Province, P. R. China
| | - Zijian Zhao
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, Jilin University, Changchun, Jilin Province, P. R. China
| | - Jiayin Liu
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, Jilin University, Changchun, Jilin Province, P. R. China
| | - Li Jiang
- Key Laboratory for Vegetation Ecology, Ministry of Education, Institute of Grassland Science, Northeast Normal University, Changchun, Jilin Province, P. R. China
| | - Haoran Xu
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, Jilin University, Changchun, Jilin Province, P. R. China
| | - Zhengqiang Li
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, Jilin University, Changchun, Jilin Province, P. R. China
- College of Life Science, Jilin University, Changchun, Jilin Province, P. R. China
- * E-mail:
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19
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Liu N, Li HJ, Shi YE, Zhu BL, Gao S. Biodegradation of high concentration of nitrobenzene by Pseudomonas corrugata embedded in peat-phosphate esterified polyvinyl alcohol. World J Microbiol Biotechnol 2013; 29:1859-67. [PMID: 23576015 DOI: 10.1007/s11274-013-1348-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Accepted: 04/06/2013] [Indexed: 11/24/2022]
Abstract
Efficiency on biodegradation of high concentration of nitrobenzene (NB) by peat-phosphate esterified polyvinyl alcohol-embedded NB-degrading bacteria Pseudomonas corrugata was conducted compared to free bacteria cells. Its biodegradation kinetics, reuse ability, degradation effect in the absence of the essential element needed for the growth of bacteria and degradation efficiency of the raw water from the contaminated site were also invested. Results show that the degradation rate when the concentration of NB was at 600, 750, and 900 mg/L reached 91.02, 83.23, and 55.9 %, which was higher than that observed in free bacteria at the same concentration levels. Biodegradation kinetics of the material could be well described by first- and zero-order kinetics when the concentration of NB was at 300, 450 mg/L and 600, 750, 900 mg/L, respectively. Stable degradation activity (stayed at a level of approximately 70 %) was displayed during the 11th repeat-batch experiment. The affect of absence of phosphorus in the medium can be abated ascribed to the addition of peat, which contributes with organic matter and other elements such as nitrogen and phosphorus necessary to maintain metabolically active the microorganisms. Effective biodegradation of the raw water from the experimental site revealed that the material can be a potential candidate for treating NB-contaminated wastewater in the practical setting.
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Affiliation(s)
- Na Liu
- College of Environment and Resources, Jilin University, Changchun, 130021, China
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Tsai SL, Lin CW, Wu CH, Shen CM. Kinetics of xenobiotic biodegradation by the Pseudomonas sp. YATO411 strain in suspension and cell-immobilized beads. J Taiwan Inst Chem Eng 2013. [DOI: 10.1016/j.jtice.2012.11.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Chen Y, Xie XG, Ren CG, Dai CC. Degradation of N-heterocyclic indole by a novel endophytic fungus Phomopsis liquidambari. BIORESOURCE TECHNOLOGY 2013; 129:568-74. [PMID: 23274220 DOI: 10.1016/j.biortech.2012.11.100] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Revised: 11/19/2012] [Accepted: 11/22/2012] [Indexed: 05/08/2023]
Abstract
A broad-spectrum endophytic Phomopsis liquidambari, was used to degrade environmental pollutant indole. In the condition of using indole as sole carbon and nitrogen source, the optimum concentration of indole supplied was determined to be 100 mg L(-1), with 41.7% ratio of indole degradation within 120 h. Exogenous addition of plant litter significantly increased indole degradation to 99.1% within 60 h. Indole oxidation to oxindole and isatin were the key steps limiting indole degradation. Plant litter addition induced fungus to produce laccase and LiP to non-specific oxidize indole. The results of fungal metabolites pathway through HPLC-MS and NMR analysis showed that indole was firstly oxidized to oxindole and isatin, and deoxidated to indolenie-2-dione, then hydroxylated to 2-dioxindole, which pyridine ring were cleaved through C-N position and changed to 2-aminobenzoic acid. Such metabolic pathway was similar with bacterial degradation of indole-3-acetic acid in plant.
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Affiliation(s)
- Yan Chen
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Science, Nanjing Normal University, Jiangsu Province 210023, China
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