1
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Ferreira AR, Skjolding LM, Sanchez DF, Bernar Ntynez AG, Ivanova YD, Feilberg KL, Chhetri RK, Andersen HR. Offshore produced water treatment by a biofilm reactor on the seabed: The effect of temperature and matrix characteristics. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 365:121391. [PMID: 38905793 DOI: 10.1016/j.jenvman.2024.121391] [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: 01/03/2024] [Revised: 05/08/2024] [Accepted: 06/03/2024] [Indexed: 06/23/2024]
Abstract
In many industrial processes a large amount of water with high salinity is co-produced whose treatment poses considerable challenges to the available technologies. The produced water (PW) from offshore operations is currently being discharged to sea without treatment for dissolved pollutants due to space limitations. A biofilter on the seabed adjacent to a production platform would negate all size restrictions, thus reducing the environmental impact of oil and gas production offshore. The moving bed biofilm reactor (MBBR) was investigated for PW treatment from different oilfields in the North Sea at 10 °C and 40 °C, corresponding to the sea and PW temperature, respectively. The six PW samples in study were characterized by high salinity and chemical oxygen demand with ecotoxic effects on marine algae S. pseudocostatum (0.4%
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Affiliation(s)
- Ana Rita Ferreira
- Department of Environmental and Resource Engineering (DTU Sustain). Water Technology & Processes. Technical University of Denmark, Bygningstorvet 115, 2800, Lyngby, Denmark.
| | - Lars Michael Skjolding
- Department of Environmental and Resource Engineering (DTU Sustain). Water Technology & Processes. Technical University of Denmark, Bygningstorvet 115, 2800, Lyngby, Denmark
| | - Diego Francisco Sanchez
- Department of Environmental and Resource Engineering (DTU Sustain). Water Technology & Processes. Technical University of Denmark, Bygningstorvet 115, 2800, Lyngby, Denmark
| | - Alexandros Georgios Bernar Ntynez
- Department of Environmental and Resource Engineering (DTU Sustain). Water Technology & Processes. Technical University of Denmark, Bygningstorvet 115, 2800, Lyngby, Denmark
| | - Yanina Dragomilova Ivanova
- Danish Offshore Technology Centre (DTU Offshore). Technical University of Denmark, Elektrovej 375, 2800, Lyngby, Denmark
| | - Karen Louise Feilberg
- Danish Offshore Technology Centre (DTU Offshore). Technical University of Denmark, Elektrovej 375, 2800, Lyngby, Denmark
| | - Ravi K Chhetri
- Department of Environmental and Resource Engineering (DTU Sustain). Water Technology & Processes. Technical University of Denmark, Bygningstorvet 115, 2800, Lyngby, Denmark
| | - Henrik R Andersen
- Department of Environmental and Resource Engineering (DTU Sustain). Water Technology & Processes. Technical University of Denmark, Bygningstorvet 115, 2800, Lyngby, Denmark
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2
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Samadi A, Kermanshahi Pour A, Beims RF, Xu CC. Delignified porous wood as biofilm support for 1,4-dioxane-degrading bacterial consortium. ENVIRONMENTAL TECHNOLOGY 2024; 45:2541-2557. [PMID: 36749305 DOI: 10.1080/09593330.2023.2178330] [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: 08/02/2022] [Accepted: 02/03/2023] [Indexed: 06/18/2023]
Abstract
Delignified porous wood samples were used as carriers for biofilm formation of a bacterial consortium with the ability to degrade 1,4-dioxane (DX). The delignification treatment of the natural wood resulted in higher porosity, formation of macropores, increase in surface roughness and hydrophilicity of the treated wood pieces. These superior properties of two types of treated carriers (respectively, A and B) compared to the untreated wood resulted in 2.19 ± 0.52- and 2.66 ± 0.23-fold higher growth of biofilm. Moreover, analysis of the fatty acid profiles indicated an increase in proportion of the saturated fatty acids during the biofilm formation, characterising an enhancement in rigidity and hydrophobicity of the biofilms. DX initial concentration of 100 mg/L was completely degraded (detection limit 0.01 mg/L) in 24 and 32 h using the treated A and B woods, while only 25.84 ± 5.95% was removed after 32 h using the untreated wood. However, fitting the DX biodegradation data to the Monod model showed a lower maximum specific growth rate for biofilm (0.0276 ± 0.0018 1/h) versus planktonic (0.0382 ± 0.0024 1/h), because of gradual accumulation of inactive cells in the biofilm. Findings of this study can contribute to the knowledge of biofilm formation regarding the physical/chemical properties of biofilm carriers and be helpful to the ongoing research on bioremediation of DX.
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Affiliation(s)
- Aryan Samadi
- Biorefining and Remediation Laboratory, Department of Process Engineering and Applied Science, Dalhousie University, Halifax, Canada
| | - Azadeh Kermanshahi Pour
- Biorefining and Remediation Laboratory, Department of Process Engineering and Applied Science, Dalhousie University, Halifax, Canada
| | - Ramon Filipe Beims
- Department of Biochemical and Chemical Engineering, University of Western Ontario, London, Canada
| | - Chunbao Charles Xu
- Department of Biochemical and Chemical Engineering, University of Western Ontario, London, Canada
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Khan MJ, Wibowo A, Karim Z, Posoknistakul P, Matsagar BM, Wu KCW, Sakdaronnarong C. Wastewater Treatment Using Membrane Bioreactor Technologies: Removal of Phenolic Contaminants from Oil and Coal Refineries and Pharmaceutical Industries. Polymers (Basel) 2024; 16:443. [PMID: 38337332 DOI: 10.3390/polym16030443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 01/22/2024] [Accepted: 01/28/2024] [Indexed: 02/12/2024] Open
Abstract
Huge amounts of noxious chemicals from coal and petrochemical refineries and pharmaceutical industries are released into water bodies. These chemicals are highly toxic and cause adverse effects on both aquatic and terrestrial life. The removal of hazardous contaminants from industrial effluents is expensive and environmentally driven. The majority of the technologies applied nowadays for the removal of phenols and other contaminants are based on physio-chemical processes such as solvent extraction, chemical precipitation, and adsorption. The removal efficiency of toxic chemicals, especially phenols, is low with these technologies when the concentrations are very low. Furthermore, the major drawbacks of these technologies are the high operation costs and inadequate selectivity. To overcome these limitations, researchers are applying biological and membrane technologies together, which are gaining more attention because of their ease of use, high selectivity, and effectiveness. In the present review, the microbial degradation of phenolics in combination with intensified membrane bioreactors (MBRs) has been discussed. Important factors, including the origin and mode of phenols' biodegradation as well as the characteristics of the membrane bioreactors for the optimal removal of phenolic contaminants from industrial effluents are considered. The modifications of MBRs for the removal of phenols from various wastewater sources have also been addressed in this review article. The economic analysis on the cost and benefits of MBR technology compared with conventional wastewater treatments is discussed extensively.
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Affiliation(s)
- Mohd Jahir Khan
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom 73170, Thailand
| | - Agung Wibowo
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom 73170, Thailand
| | - Zoheb Karim
- MoRe Research Örnsköldsvik AB, SE-89122 Örnsköldsvik, Sweden
| | - Pattaraporn Posoknistakul
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom 73170, Thailand
| | - Babasaheb M Matsagar
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Kevin C-W Wu
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
- Department of Chemical Engineering and Materials Science, Yuan Ze University, Chung-Li, Taoyuan 32003, Taiwan
| | - Chularat Sakdaronnarong
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom 73170, Thailand
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4
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Swain G, Maurya KL, Kumar M, Sonwani RK, Singh RS, Jaiswal RP, Nath Rai B. The Biodegradation of 4-Chlorophenol in a Moving Bed Biofilm Reactor Using Response Surface Methodology: Effect of Biogenic Substrate and Kinetic Evaluation. Appl Biochem Biotechnol 2023; 195:5280-5298. [PMID: 35606635 DOI: 10.1007/s12010-022-03954-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 05/02/2022] [Indexed: 01/05/2023]
Abstract
4-Chlorophenol (4-CP) is a persistent organic pollutant commonly found in petrochemical effluents. It causes toxic, carcinogenic and mutagenic effects on human beings and aquatic lives. Therefore, an environmentally benign and cost-effective approach is needed against such pollutants. In this direction, the chlorophenol degrading bacterial consortium consisting of Bacillus flexus GS1 IIT (BHU) and Bacillus cereus GS2 IIT (BHU) was isolated from a refinery site. A composite biocarrier namely polypropylene-polyurethane foam (PP-PUF) was developed for bacterial cells immobilization purpose. A lab-scale moving bed biofilm reactor (MBBR) packed with Bacillus sp. immobilized PP-PUF biocarrier was employed to analyse the effect of peptone on biodegradation of 4-CP. The statistical tool, i.e. response surface methodology (RSM), was used to optimize the process variables (4-CP concentration, peptone concentration and hydraulic retention time). The higher values of peptone concentration and hydraulic retention time were found to be favourable for maximum removal of 4-CP. At the optimized process conditions, the maximum removals of 4-CP and chemical oxygen demand (COD) were obtained to be 91.07 and 75.29%, respectively. In addition, three kinetic models, i.e. second-order, Monod and modified Stover-Kincannon models, were employed to investigate the behaviour of MBBR during 4-CP biodegradation. The high regression coefficients obtained by the second-order and modified Stover-Kincannon models showed better accuracy for estimating substrate degradation kinetics. The phytotoxicity study supported that the Vigna radiata seeds germinated in treated wastewater showed higher growth (i.e. radicle and plumule) than the untreated wastewater.
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Affiliation(s)
- Ganesh Swain
- Department of Chemical Engineering & Technology IIT (BHU), Uttar Pradesh, Varanasi, 221005, India
| | - Kanhaiya Lal Maurya
- Department of Chemical Engineering & Technology IIT (BHU), Uttar Pradesh, Varanasi, 221005, India
| | - Mohit Kumar
- Department of Chemical Engineering & Technology IIT (BHU), Uttar Pradesh, Varanasi, 221005, India
| | - R K Sonwani
- Department of Chemical Engineering & Technology IIT (BHU), Uttar Pradesh, Varanasi, 221005, India
| | - R S Singh
- Department of Chemical Engineering & Technology IIT (BHU), Uttar Pradesh, Varanasi, 221005, India
| | - Ravi P Jaiswal
- Department of Chemical Engineering & Technology IIT (BHU), Uttar Pradesh, Varanasi, 221005, India
| | - Birendra Nath Rai
- Department of Chemical Engineering & Technology IIT (BHU), Uttar Pradesh, Varanasi, 221005, India.
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5
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Faggiano A, De Carluccio M, Fiorentino A, Ricciardi M, Cucciniello R, Proto A, Rizzo L. Photo-Fenton like process as polishing step of biologically treated olive mill wastewater for phenols removal. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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6
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Mishra S, Huang Y, Li J, Wu X, Zhou Z, Lei Q, Bhatt P, Chen S. Biofilm-mediated bioremediation is a powerful tool for the removal of environmental pollutants. CHEMOSPHERE 2022; 294:133609. [PMID: 35051518 DOI: 10.1016/j.chemosphere.2022.133609] [Citation(s) in RCA: 55] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 01/09/2022] [Accepted: 01/11/2022] [Indexed: 06/14/2023]
Abstract
Biofilm-mediated bioremediation is an attractive approach for the elimination of environmental pollutants, because of its wide adaptability, biomass, and excellent capacity to absorb, immobilize, or degrade contaminants. Biofilms are assemblages of individual or mixed microbial cells adhering to a living or non-living surface in an aqueous environment. Biofilm-forming microorganisms have excellent survival under exposure to harsh environmental stressors, can compete for nutrients, exhibit greater tolerance to pollutants compared to free-floating planktonic cells, and provide a protective environment for cells. Biofilm communities are thus capable of sorption and metabolization of organic pollutants and heavy metals through a well-controlled expression pattern of genes governed by quorum sensing. The involvement of quorum sensing and chemotaxis in biofilms can enhance the bioremediation kinetics with the help of signaling molecules, the transfer of genetic material, and metabolites. This review provides in-depth knowledge of the process of biofilm formation in microorganisms, their regulatory mechanisms of interaction, and their importance and application as powerful bioremediation agents in the biodegradation of environmental pollutants, including hydrocarbons, pesticides, and heavy metals.
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Affiliation(s)
- Sandhya Mishra
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| | - Yaohua Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| | - Jiayi Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| | - Xiaozhen Wu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| | - Zhe Zhou
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| | - Qiqi Lei
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| | - Pankaj Bhatt
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| | - Shaohua Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China.
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7
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Hu Y, Hu Y, Li Y, Hui M, Lu Z, Li H, Tian H. Metagenomic insights into quorum sensing in membrane-aerated biofilm reactors for phenolic wastewater treatment. ENVIRONMENTAL TECHNOLOGY 2022; 43:1318-1327. [PMID: 32976081 DOI: 10.1080/09593330.2020.1829084] [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: 06/09/2020] [Accepted: 09/18/2020] [Indexed: 06/11/2023]
Abstract
Quorum sensing (QS) is of crucial importance for the formation and performance of biofilms adhered to aerated membranes. In this study, the QS-related genes in membrane-aerated biofilm reactors (MABR) for phenolic wastewater treatment were investigated through high-throughput metagenomic sequencing. Results showed that numerous regulatory QS-related genes were associated with the production of signals including acyl-homoserine lactones (AHLs) and diguanylate monophosphate (c-di-GMP), indicating that the biofilms were potentially regulated by the AHL-mediated QS and c-di-GMP-mediated QS systems. Species and functional contribution analysis demonstrated that Pseudomonas, Achromobacter, Rhodococcus, Granulicoccus and Thauera were the key QS-related gene carriers. Redundancy analysis and Spearman correlation analysis showed that high influent phenolic loading gave rise to a high relative abundance of QS bacteria within the biofilm community. Thus, QS-related genes likely play an important role in strengthening biofilm resistance to phenolics, as well as the removal of phenolic contaminants.
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Affiliation(s)
- Yanzhuo Hu
- College of Bioengineering, Henan University of Technology, Zhengzhou, People's Republic of China
| | - Yuansen Hu
- College of Bioengineering, Henan University of Technology, Zhengzhou, People's Republic of China
| | - Yuanyuan Li
- College of Bioengineering, Henan University of Technology, Zhengzhou, People's Republic of China
| | - Ming Hui
- College of Bioengineering, Henan University of Technology, Zhengzhou, People's Republic of China
| | - Ziwei Lu
- College of Bioengineering, Henan University of Technology, Zhengzhou, People's Republic of China
| | - Hailong Li
- Henan Yuebao Biotech Company, Zhengzhou, People's Republic of China
| | - Hailong Tian
- College of Bioengineering, Henan University of Technology, Zhengzhou, People's Republic of China
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8
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Tian H, Xu X, Qu J, Li H, Hu Y, Huang L, He W, Li B. Biodegradation of phenolic compounds in high saline wastewater by biofilms adhering on aerated membranes. JOURNAL OF HAZARDOUS MATERIALS 2020; 392:122463. [PMID: 32193113 DOI: 10.1016/j.jhazmat.2020.122463] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 02/29/2020] [Accepted: 03/02/2020] [Indexed: 06/10/2023]
Abstract
High saline phenolic wastewater is a typical toxic and refractory industrial wastewater. A single membrane-aerated biofilm reactor (MABR) was used to treat wastewater containing phenol, p-nitrophenol and hydroquinone under increasing phenolic loading and salinity conditions. More than 95 % of phenolic compounds were removed, and a removal efficiency of 8.9 g/m2 d for total phenolic (TP) contents was achieved under conditions with 32 g/L of salt and 763 mg/L of influent TP contents. The microbial diversity, structure and function of a biofilm exposed to different conditions were investigated by high-throughput 16S rRNA gene sequencing and metagenomics. Salinity and specific TP loading substantially affected the bacterial community. Gammaproteobacteria, Actinobacteria and Betaproteobacteria contributed more to initial phenolic compound degradation than other classes, with Pseudomonas and Rhodococcus as the main contributing genera. The key phenolic-degrading genes of different metabolic pathways were explored, and their relative abundance was strengthened with increasing phenolic loading and salinity. The diverse cooperation and competition patterns of these microorganisms further promoted the high removal efficiency of multiple phenolic contaminants in the biofilms. These results demonstrate the feasibility of MABR for degrading multiple phenolic compounds in high saline wastewater.
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Affiliation(s)
- Hailong Tian
- College of Bioengineering, Henan University of Technology, Zhengzhou 450001, PR China
| | - Xingjian Xu
- Hinggan League Academy of Agriculture and Animal Husbandry, Ulanhot, Inner Mongolia 137400, PR China
| | - Jianhang Qu
- College of Bioengineering, Henan University of Technology, Zhengzhou 450001, PR China.
| | - Haifeng Li
- College of Bioengineering, Henan University of Technology, Zhengzhou 450001, PR China
| | - Yanzhuo Hu
- College of Bioengineering, Henan University of Technology, Zhengzhou 450001, PR China
| | - Liang Huang
- College of Bioengineering, Henan University of Technology, Zhengzhou 450001, PR China
| | - Wentian He
- Shanghai Majorbio Bio-pharm Technology Co.,Ltd, Shanghai 201203, PR China
| | - Baoan Li
- State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, PR China; College of Environmental Science and Engineering, Nankai University, Tianjin 300072, PR China.
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9
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Li H, Meng F, Duan W, Lin Y, Zheng Y. Biodegradation of phenol in saline or hypersaline environments by bacteria: A review. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 184:109658. [PMID: 31520955 DOI: 10.1016/j.ecoenv.2019.109658] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 07/27/2019] [Accepted: 09/05/2019] [Indexed: 06/10/2023]
Abstract
With the continuous demand from industry for chemical raw materials, a large amount of high-salinity wastewater containing phenol is discharged into the aquatic environment, and the leakage of dangerous chemicals into the sea may lead to phenol pollution of the ocean. Phenol is a common chemical posing serious environmental hazard. Biodegradation is an effective, low-cost, environment-friendly method of removing phenol from water, but in hypersaline environments, traditional freshwater organisms are less efficacious. Here, at least 17 genera of bacteria from three phyla are found that can degrade phenol in different saline environments. The sources and taxonomy of halotolerant and halophilic bacteria are reviewed. Moreover, the pathway of phenol removal, kinetics of biodegradation, influencing factors, and recent treatment processes of wastewater are discussed.
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Affiliation(s)
- Hao Li
- Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao, 266100, China
| | - Fanping Meng
- Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao, 266100, China; College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China.
| | - Weiyan Duan
- Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao, 266100, China
| | - Yufei Lin
- National Marine Hazard Mitigation Service, Ministry of Natural Resource of the People's Republic of China, Beijing, 100194, China
| | - Yang Zheng
- Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao, 266100, China; College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China; National Marine Hazard Mitigation Service, Ministry of Natural Resource of the People's Republic of China, Beijing, 100194, China
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10
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Irankhah S, Abdi Ali A, Reza Soudi M, Gharavi S, Ayati B. Highly efficient phenol degradation in a batch moving bed biofilm reactor: benefiting from biofilm-enhancing bacteria. World J Microbiol Biotechnol 2018; 34:164. [PMID: 30368594 DOI: 10.1007/s11274-018-2543-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Accepted: 10/20/2018] [Indexed: 11/26/2022]
Abstract
In this study, the efficiency improvement of three moving bed biofilm reactors (MBBRs) was investigated by inoculation of activated sludge cells (R1), mixed culture of eight strong phenol-degrading bacteria consisted of Pseudomonas spp. and Acinetobacter spp. (R2) and the combination of both (R3). Biofilm formation ability of eight bacteria was assessed initially using different methods and media. Maximum degradation of phenol, COD, biomass growth and also changes in organic loading shock were used as parameters to measure the performance of reactors. According to the results, all eight strains were determined as enhanced biofilm forming bacteria (EBFB). Under optimum operating conditions, more than 90% of initial COD load of 2795 mg L-1 was reduced at 24 HRT in R3 while this reduction efficiency was observed in concentrations of 1290 mg L-1 and 1935 mg L-1, in R1 and R2, respectively. When encountering phenol loading shock-twice greater than optimum amount-R1, R2 and R3 managed to return to the steady-state condition within 32, 24 and 18 days, respectively. SEM microscopy and biomass growth measurements confirmed the contribution of more cells to biofilm formation in R3 followed by R2. Additionally, established biofilm in R3 was more resistant to phenol loading shock which can be attributed to the enhancer role of EBFB strains in this reactor. It has been demonstrated that the bacteria with both biofilm-forming and contaminant-degrading abilities are not only able to promote the immobilization of other favorable activated sludge cells in biofilm structure, but also cooperate in contaminant degradation which all consequently lead to improvement of treatment efficiency.
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Affiliation(s)
- Sahar Irankhah
- Department of Microbiology, Faculty of Biological Sciences, Alzahra University, Tehran, 1993891176, Iran
| | - Ahya Abdi Ali
- Department of Microbiology, Faculty of Biological Sciences, Alzahra University, Tehran, 1993891176, Iran.
| | - Mohammad Reza Soudi
- Department of Microbiology, Faculty of Biological Sciences, Alzahra University, Tehran, 1993891176, Iran
| | - Sara Gharavi
- Department of Biotechnology, Faculty of Biological Sciences, Alzahra University, Tehran, Iran
| | - Bita Ayati
- Environmental Engineering Division, Civil and Environmental Engineering Faculty, Tarbiat Modares University, Tehran, Iran
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11
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Preparation, Characterization, and Application of Silica Aerogel for Adsorption of Phenol: An In-Depth Isotherm Study. HEALTH SCOPE 2018. [DOI: 10.5812/jhealthscope.15115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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12
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Chen M, Fan R, Zou W, Zhou H, Tan Z, Li X. Bioaugmentation for treatment of full-scale diethylene glycol monobutyl ether (DGBE) wastewater by Serratia sp. BDG-2. JOURNAL OF HAZARDOUS MATERIALS 2016; 309:20-26. [PMID: 26874308 DOI: 10.1016/j.jhazmat.2016.01.076] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 12/09/2015] [Accepted: 01/28/2016] [Indexed: 06/05/2023]
Abstract
A novel bacterial strain BDG-2 was isolated and used to augment the treatment of silicon plate manufacturing wastewater that primarily contains diethylene glycol monobutyl ether (DGBE). BDG-2 was identified as a Serratia sp. Under the optimal conditions of 30 °C, pH 9 and DGBE concentration of 2000 mg L(-1), the bioaugmented system achieved 96.92% COD removal after 39.9h. Laboratory-scale technological matching results indicated that, in a biofilm process with the addition of 100 mg L(-1) ammonia and 5 mg L(-1) total phosphorus (TP), 70.61% COD removal efficiency could be obtained in 46 h. Addition of polyaluminium chloride (PAC) to the reactors during the suspension process enhanced the settleability of the BDG-2 culture. Subsequently, successful start-up and stable operation of a full-scale bioaugmented treatment facilities were accomplished, and the volumetric organic load in the plug-flow aeration tank was 2.17 ± 0.81 kg m(-3) d(-1). The effluent COD of the facilities was stable and always below 100 mg L(-1).
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Affiliation(s)
- Maoxia Chen
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China; Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
| | - Rong Fan
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China; Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
| | - Wenhui Zou
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China; Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
| | - Houzhen Zhou
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China; Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
| | - Zhouliang Tan
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China; Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China.
| | - Xudong Li
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China; Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
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Cao SMS, Fontoura GAT, Dezotti M, Bassin JP. Combined organic matter and nitrogen removal from a chemical industry wastewater in a two-stage MBBR system. ENVIRONMENTAL TECHNOLOGY 2015; 37:96-107. [PMID: 26086717 DOI: 10.1080/09593330.2015.1063708] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Pesticide-producing factories generate highly polluting wastewaters containing toxic and hazardous compounds which should be reduced to acceptable levels before discharge. In this study, a chemical industry wastewater was treated in a pre-denitrification moving-bed biofilm reactor system subjected to an increasing internal mixed liquor recycle ratio from 2 to 4. Although the influent wastewater characteristics substantially varied over time, the removal of chemical oxygen demand (COD) and dissolved organic carbon was quite stable and mostly higher than 90%. The highest fraction of the incoming organic matter was removed anoxically, favouring a low COD/N environment in the subsequent aerobic nitrifying tank and thus ensuring stable ammonium removal (90-95%). However, during pH and salt shock periods, nitrifiers were severely inhibited but gradually restored their full nitrifying capability as non-stressing conditions were reestablished. Besides promoting an increase in the maximum nitrification potential of the aerobic attached biomass from 0.34 to 0.63 mg [Formula: see text], the increase in the internal recycle ratio was accompanied by an increase in nitrogen removal (60-78%) and maximum specific denitrification rate (2.7-3.3 mg NOx(-)--N). Total polysaccharides (PS) and protein (PT) concentrations of attached biomass were observed to be directly influenced by the influent organic loading rate, while the PS/PT ratio mainly ranged from 0.3 to 0.5. Results of Microtox tests showed that no toxicity was found in the effluent of both the anoxic and aerobic reactors, indicating that the biological process was effective in removing residual substances which might adversely affect the receiving waters' ecosystem.
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Affiliation(s)
- S M S Cao
- a Chemical Engineering Program/COPPE , Federal University of Rio de Janeiro - COPPE - Chemical Engineering Program , P.O. Box 68502, 21941-972 Rio de Janeiro , Brazil
| | | | - M Dezotti
- a Chemical Engineering Program/COPPE , Federal University of Rio de Janeiro - COPPE - Chemical Engineering Program , P.O. Box 68502, 21941-972 Rio de Janeiro , Brazil
| | - J P Bassin
- a Chemical Engineering Program/COPPE , Federal University of Rio de Janeiro - COPPE - Chemical Engineering Program , P.O. Box 68502, 21941-972 Rio de Janeiro , Brazil
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