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Su Q, Dai D, Liao Y, Han H, Wu J, Ren Z. Synthetic microbial consortia to enhance the biodegradation of compost odor by biotrickling filter. BIORESOURCE TECHNOLOGY 2023; 387:129698. [PMID: 37598805 DOI: 10.1016/j.biortech.2023.129698] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 08/11/2023] [Accepted: 08/17/2023] [Indexed: 08/22/2023]
Abstract
Composting generates odorous gases, including ammonia (NH3), hydrogen sulfide (H2S), and volatile organic compounds (VOCs). The Biological Trickling Filter (BTF) is effective for odor treatment, but it may have limitations with hydrophobic VOCs. In this study, a strain of Bacillus subtilis with ammonia-reducing ability, a strain of Bacillus cereus with desulfurization ability and a strain of Schizophyllum commune with the ability to degrade dimethyl disulfide were isolated and screened. The three strains were combined to create synthetic microbial consortia for enhancing odor treatment in the BTF. Compared to the activated sludge control, the BTF with synthetic microbial consortia removed 92.43% ammonia, 92.75% hydrogen sulfide. Furthermore, it demonstrated a significant improvement in the removal rates of p-methyl mercaptan, methyl sulfide, and dimethyl disulfide. High-throughput sequencing was conducted on the fillers of the synthetic microbial consortia-inoculated BTF to analyze the microbial community composition.
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Affiliation(s)
- Qihang Su
- Key Laboratory of Agriculture Animal Genetics, Breeding and Reproduction of the Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Dunwu Dai
- Key Laboratory of Agriculture Animal Genetics, Breeding and Reproduction of the Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Youjun Liao
- Key Laboratory of Agriculture Animal Genetics, Breeding and Reproduction of the Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Hongbo Han
- Key Laboratory of Agriculture Animal Genetics, Breeding and Reproduction of the Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jian Wu
- Key Laboratory of Agriculture Animal Genetics, Breeding and Reproduction of the Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; Frontiers Science Center for Animal Breeding and Sustainable Production, Wuhan 430070, China.
| | - Zhuqing Ren
- Key Laboratory of Agriculture Animal Genetics, Breeding and Reproduction of the Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; Frontiers Science Center for Animal Breeding and Sustainable Production, Wuhan 430070, China; Hubei Hongshan Laboratory, Wuhan 430070, China.
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2
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Liu B, Lai J, Wu S, Jiang J, Kuang W. Endophytic bacterial community diversity in two citrus cultivars with different citrus canker disease resistance. Arch Microbiol 2021; 203:5453-5462. [PMID: 34406444 DOI: 10.1007/s00203-021-02530-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 07/26/2021] [Accepted: 08/13/2021] [Indexed: 12/29/2022]
Abstract
The selective infection of Xanthomonas citri pv. citri (Xcc) to citrus cultivars is universally known, but the relationship between endophytic bacteria and the resistance of host variety to canker disease remains unclear. In this study, endophytic bacterial populations of two citrus cultivars-the resistant satsuma mandarin and the susceptible Newhall navel orange-were analyzed through high-throughput sequencing. The results showed that endophytic bacterial community of satsuma mandarin was more abundant than that of Newhall navel orange. In addition, bacterial abundance was the highest in the spring samples, followed by that in summer and winter samples, in both the varieties. In all samples, the predominant phyla were Proteobacteria, Firmicutes, Actinobacteria, and Bacteroidetes; the major genera were Bacillus and Stenotrophomonas, and the main species was Bacillus subtilis. According to the analysis of the predominant bacteria in the two citrus cultivars, B. subtilis with potential antagonistic characteristics against Xcc existed universally in all samples. However, the susceptible Newhall navel oranges were abundant in Bacillus subtilis and had a relatively large number of canker-causing cooperative bacteria such as Stenotrophomonas. The results suggested that endophytic bacterial community of the two citrus cultivars had some differences based on the season or plant tissue, and these differences were mainly in the quantity of bacteria, affecting citrus canker disease occurrence. In conclusion, the differences in endophytic bacteria on citrus cultivars might be related to host resistance or susceptibility to citrus canker disease.
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Affiliation(s)
- Bing Liu
- College of Agronomy, Jiangxi Agricultural University, Nanchang, 330045, Jiangxi, China.
| | - Jiahao Lai
- College of Agronomy, Jiangxi Agricultural University, Nanchang, 330045, Jiangxi, China
| | - Simeng Wu
- College of Agronomy, Jiangxi Agricultural University, Nanchang, 330045, Jiangxi, China
| | - Junxi Jiang
- College of Agronomy, Jiangxi Agricultural University, Nanchang, 330045, Jiangxi, China
| | - Weigang Kuang
- College of Agronomy, Jiangxi Agricultural University, Nanchang, 330045, Jiangxi, China.
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Wang SS, Cheng HY, Zhang H, Su SG, Sun YL, Wang HC, Han JL, Wang AJ, Guadie A. Sulfur autotrophic denitrification filter and heterotrophic denitrification filter: Comparison on denitrification performance, hydrodynamic characteristics and operating cost. ENVIRONMENTAL RESEARCH 2021; 197:111029. [PMID: 33744267 DOI: 10.1016/j.envres.2021.111029] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 02/11/2021] [Accepted: 03/13/2021] [Indexed: 06/12/2023]
Abstract
Sulfur autotrophic denitrification (SAD) process, as an alternative to heterotrophic denitrification (HD) filter, receives growing interest in polishing the effluent from secondary sewage treatment. Although individual studies have indicated several advantages of SAD over HD, rare study has compared these two systems under identical condition and by using real secondary effluent. In this study, two small pilot scale filters (SAD and HD) were designed with identical configuration and operated parallelly by feeding the real secondary effluent from a WWTP. The results showed SAD filter can be started up without the addition of soluble electron donor, although the time (14 days) was about 3 times longer than that of HD filter. The nitrate removal rate of SAD filter at HRT of 1.4 h was measured as 0.268 ± 0.047 kg N/(m3∙d). Similar value was observed in HD filter with supplementing 90 mg/L COD. The COD concentration of effluent always kept lower than that of influent in SAD filter but not in HD filter. In addition, SAD filter could maintain a stable denitrification performance without backwash for 15 days, while decline of nitrate removal rate was observed in HD filter just 2 days after stopping the backwash. This different behavior was further confirmed as the SAD filter had a better hydraulic flow pattern. Analysis according to high-throughput 16S rRNA gene-based Illumina MiSeq sequencing clearly showed the microbial community evolution and differentiation among the samples of seed sludge, SAD and HD filters. Finally, the economic assessment was carried out, showing the operation cost of SAD filter was over 50% lower than that of HD filter.
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Affiliation(s)
- Shu-Sen Wang
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Hao-Yi Cheng
- School of Civil & Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, PR China.
| | - Hao Zhang
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China
| | - Shi-Gang Su
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China
| | - Yi-Lu Sun
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China
| | - Hong-Cheng Wang
- School of Civil & Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, PR China
| | - Jing-Long Han
- School of Civil & Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, PR China
| | - Ai-Jie Wang
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China; School of Civil & Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, PR China.
| | - Awoke Guadie
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China; Department of Biology, College of Natural Sciences, Arba Minch University, Arba Minch 21, Ethiopia
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Wu H, Yang M, Tsui TH, Yin Z, Yin C. Comparative evaluation on the utilization of applied electrical potential in a conductive granule packed biotrickling filter for continuous abatement of xylene: Performance, limitation, and microbial community. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 274:111145. [PMID: 32801108 DOI: 10.1016/j.jenvman.2020.111145] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 07/25/2020] [Accepted: 07/26/2020] [Indexed: 06/11/2023]
Abstract
This study investigates the use of electrically conductive granules as packing material in biotrickling filter (BTF) systems as to provide insights on the specific microbial abundance and functions during the treatment of xylene-containing waste gas. In addition, the effect of applied potential on attached biofilm on conductive granules during xylene degradation was briefly investigated. During stable operation period, the conductive granules packed BTF achieved reactor performance of no less than 80% with a maximum EC of 137.7 g/m3 h. Under applied potential of 1V, the BTF system showed deterioration of xylene removal by ranging from 21 to 76%, which also affected the distribution and relative abundance of the major microorganisms such as Xanthobacter, Acidovorax, Rhodococcus, Hydrogenophaga, Arthrobacter, Brevundimonas, Pseudoxanthomonas, Devosia, Shinella, Sphingobium, Dokdonella, Pseudomonas and Bosea. The acclimation of applied potential led to the enrichment of autotrophic bacteria and strains, which are correlated to improved nitrogen cycling. In general, applying electrical potential is feasible to shape the microbiological structure of biofilms to selectively adjust their biochemical functions.
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Affiliation(s)
- Hao Wu
- Department of Chemistry, Yanbian University, Yanji, 133002, China; Department of Environmental Engineering, Yanshan University, Qinhuangdao, 066000, China
| | - Mengxin Yang
- Department of Chemistry, Yanbian University, Yanji, 133002, China
| | - To-Hung Tsui
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Zhenxing Yin
- Department of Chemistry, Yanbian University, Yanji, 133002, China.
| | - Chengri Yin
- Department of Chemistry, Yanbian University, Yanji, 133002, China.
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Li L, Chai F, Liang C, Wang Y, Zhang X, Yang K, Xiao B. Comparison and application of biofilter and suspended bioreactor in removing gaseous o-xylene. ENVIRONMENTAL RESEARCH 2020; 188:109853. [PMID: 32846642 DOI: 10.1016/j.envres.2020.109853] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 05/26/2020] [Accepted: 06/17/2020] [Indexed: 06/11/2023]
Abstract
Two bioreactors, suspended-growth bioreactors (SPB) and biofilter (BF), were compared for the performances in removing gaseous o-xylene. Their efficiencies were investigated by varying the o-xylene loadings, gas flow rates, and gas-water ratios. High-throughput techniques were applied for the microbial populations assay. The conversion rate of carbon in o-xylene was calculated, and the relationship between biomass and removal efficiencies was also analyzed. Results indicated that both the SPB and BF could effectively treat gases containing o-xylene. The average removal efficiencies were 91.8% and 93.5%, respectively. The elimination capacity of the BF was much higher than that of the SPB when the intake load was below 150 g m-3 h-1. When the o-xylene loadings were over 150 g m-3 h-1, both the SPB and BF achieved similar o-xylene removal rates. The maximum elimination capacities were 28.36 g m-3 h-1 for the SPB and 30.67 g m-3 h-1 for BF. The SPB was more sensitive to the changes in the gas flow rate. Results of microbial assay indicated that bacteria e.g. Mycobacterium sp. and Rhodanobacter sp. might play important roles in removing o-xylene in the SPB, while the bacteria Pseudomonas sp., Sphingomonas sp., and Defluviicoccus sp., and the fungi Aspergillus sp. and Scedosporium sp., were the o-xylene degraders in the BF. The successful application of the integrated bioreactor in treating gases containing o-xylene exhausted from the electroplating plant indicated that the integration of SPB and BF could be an effective method for removing VOCs with Henry coefficient in the range of 0.01-1.
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Affiliation(s)
- Lin Li
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing, 101408, China
| | - Fengguang Chai
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing, 101408, China
| | - Cunzhen Liang
- Department of Environmental Engineering, Beijing Institute of Petrochemical Technology, Beijing, 102617, China
| | - Ying Wang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing, 101408, China
| | - Xiao Zhang
- Department of Environmental Engineering, Beijing Institute of Petrochemical Technology, Beijing, 102617, China
| | - Kaixiong Yang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing, 101408, China
| | - Benyi Xiao
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
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Fan F, Xu R, Wang D, Meng F. Application of activated sludge for odor control in wastewater treatment plants: Approaches, advances and outlooks. WATER RESEARCH 2020; 181:115915. [PMID: 32485441 DOI: 10.1016/j.watres.2020.115915] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 04/14/2020] [Accepted: 05/02/2020] [Indexed: 06/11/2023]
Abstract
Odors from wastewater treatment plants (WWTPs) have attracted extensive attention and stringent environmental standards are more widely adopted to reduce odor emissions. Biological odor treatment methods have broader applications than the physical and chemical counterparts as they are environment-friendly, cost-effective and generate low secondary wastes. The aqueous activated sludge (AS) processes are among the most promising approaches for the prevention or end-of-pipe removal of odor emissions and have the potential to simultaneously treat odor and wastewater. However, AS deodorization biotechnologies in WWTPs still need to be further systematically summarized and categorized while in-depth discussions on the characteristics and underlying mechanisms of AS deodorization process are still lacking. Recently, considerable studies have been reported to elucidate the microbial metabolisms in odor control and wastewater treatment. This paper reviews the fundamentals, characteristics, advances and field experiences of three AS biotechnologies for odor treatment in WWTPs, i.e., AS recycling, microaeration in AS digester and AS diffusion. The underlying deodorization mechanisms of typical odors have been revealed through the summary of recent advances on multi-element conversions, metabolic interactions of bacteria, microscopic characterization and identification of functional microorganisms. Future research aspects to advance the emerging deodorization AS process, such as deodorization mechanisms, simultaneous odor and water treatment, synergistic treatment with other air emissions, are discussed.
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Affiliation(s)
- Fuqiang Fan
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510275, PR China
| | - Ronghua Xu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510275, PR China
| | - Depeng Wang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510275, PR China
| | - Fangang Meng
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510275, PR China.
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7
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López JC, Porca E, Collins G, Clifford E, Quijano G, Muñoz R. Ammonium influences kinetics and structure of methanotrophic consortia. WASTE MANAGEMENT (NEW YORK, N.Y.) 2019; 89:345-353. [PMID: 31079748 DOI: 10.1016/j.wasman.2019.04.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Revised: 04/02/2019] [Accepted: 04/12/2019] [Indexed: 06/09/2023]
Abstract
The literature is conflicted on the influence of ammonium on the kinetics and microbial ecology of methanotrophy. In this study, methanotrophic cultures were enriched, under ammonium concentrations ranging from 0 to 200 mM, from an inoculum comprising leachate and top-cover soil from a landfill. Specific CH4 biodegradation rates were highest (7.8 × 10-4 ± 6.0 × 10-5 gCH4 gX-1 h-1) in cultures enriched at 4 mM NH4+, which were mainly dominated by type II methanotrophs belonging to Methylocystis spp. Lower specific CH4 oxidation rates (average values of 1.8-3.6 × 10-4 gCH4 gX-1 h-1) were achieved by cultures enriched at higher NH4+ concentrations (20 and 80 mM), and had higher affinity for CH4 compared to 4 mM enrichments. These lower affinities were attributed to lower diversity dominated by type I methanotrophs, of the Methylosarcina, Methylobacter and Methylomicrobium genera, encountered with increasing concentrations of NH4+. The study indicates that CH4 oxidation biotechnologies applied at low NH4+ concentrations can support efficient abatement of CH4 and high diversity of methanotrophic consortia, whilst enriching type II methanotrophs.
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Affiliation(s)
- Juan C López
- Department of Chemical Engineering and Environmental Technology, University of Valladolid, Dr. Mergelina, s/n, 47011 Valladolid, Spain
| | - Estefanía Porca
- Microbial Communities Laboratory, School of Natural Sciences, National University of Ireland Galway, University Road, Galway H91 TK33, Ireland; Ryan Institute, National University of Ireland Galway, University Road, Galway H91 TK33, Ireland
| | - Gavin Collins
- Microbial Communities Laboratory, School of Natural Sciences, National University of Ireland Galway, University Road, Galway H91 TK33, Ireland; Ryan Institute, National University of Ireland Galway, University Road, Galway H91 TK33, Ireland
| | - Eoghan Clifford
- Ryan Institute, National University of Ireland Galway, University Road, Galway H91 TK33, Ireland; College of Engineering and Informatics, National University of Ireland Galway, University Road, Galway H91 F677, Ireland
| | - Guillermo Quijano
- Laboratory for Research on Advanced Processes for Water Treatment, Instituto de Ingeniería, Unidad Académica Juriquilla, Universidad Nacional Autónoma de México, Blvd. Juriquilla 3001, Querétaro 76230, Mexico
| | - Raúl Muñoz
- Department of Chemical Engineering and Environmental Technology, University of Valladolid, Dr. Mergelina, s/n, 47011 Valladolid, Spain; Institute of Sustainable Proceses, University of Valladolid, Spain.
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Cheng Z, Zhang X, Kennes C, Chen J, Chen D, Ye J, Zhang S, Dionysiou DD. Differences of cell surface characteristics between the bacterium Pseudomonas veronii and fungus Ophiostoma stenoceras and their different adsorption properties to hydrophobic organic compounds. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 650:2095-2106. [PMID: 30290351 DOI: 10.1016/j.scitotenv.2018.09.337] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 09/22/2018] [Accepted: 09/26/2018] [Indexed: 06/08/2023]
Abstract
The first step of microbial biodegradation is the adsorption of pollutants on the microorganisms' surface, which is determined by the microorganism type and pollutant hydrophobicity. One fungus Ophiostoma stenoceras LLC and one bacterium Pseudomonas veronii ZW were chosen for the investigation of cell surface hydrophobicity and adsorption abilities to various organic compounds. Results showed that the fungus could better capture and adsorb organic compounds in liquid and gas phases, and the adsorption was a physical monolayer adsorption process. Much smaller partition coefficient for gas-fungus suggested that direct gaseous adsorption was preferred. The XPS (X-ray photoelectron spectroscopy) characterization further confirmed that several functional groups changed after the adsorption of compounds. The time taken for complete degradation of hexane, tetrahydrofuran and chlorobenzene was shorter with the addition of O. stenoceras LLC. Such findings are useful in exploring the special cell surface of fungus in adsorption and bioenhancement for organic treatment of organic contaminants using bacteria.
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Affiliation(s)
- Zhuowei Cheng
- College of Environment, Zhejiang University of Technology, Hangzhou 310009, China; Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering (ChEE), University of Cincinnati, Cincinnati, OH 45221-0012, USA
| | - Xiaomin Zhang
- College of Environment, Zhejiang University of Technology, Hangzhou 310009, China
| | - Christian Kennes
- Chemical Engineering Laboratory, Faculty of Science, University of La Coruna, 15001, Spain
| | - Jianmeng Chen
- College of Environment, Zhejiang University of Technology, Hangzhou 310009, China.
| | - Dongzhi Chen
- College of Environment, Zhejiang University of Technology, Hangzhou 310009, China
| | - Jiexu Ye
- College of Environment, Zhejiang University of Technology, Hangzhou 310009, China
| | - Shihan Zhang
- College of Environment, Zhejiang University of Technology, Hangzhou 310009, China
| | - Dionysios D Dionysiou
- Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering (ChEE), University of Cincinnati, Cincinnati, OH 45221-0012, USA.
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Aghayani E, Moussavi G, Naddafi K. Improved peroxidase-mediated biodegradation of toluene vapors in the moving-bed activated sludge diffusion (MASD) process using biosurfactant-generating biomass stimulated with H 2O 2. JOURNAL OF HAZARDOUS MATERIALS 2019; 361:259-266. [PMID: 30199825 DOI: 10.1016/j.jhazmat.2018.08.076] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 08/17/2018] [Accepted: 08/22/2018] [Indexed: 06/08/2023]
Abstract
Two strategies were attempted to improve the biodegradation and mineralization of toluene vapors in the activated sludge diffusion (ASD) process using biosurfactant-generating Pseudomonas spp. and Bacillus spp. mixture. Different operational parameters including toluene concentration, superficial air velocity, biomass concentration, moving-media insertion and H2O2 were evaluated on toluene removal in the ASD process within 550 days of operation. It was found that complete biodegradation and 79.8% mineralization of toluene vapors at inlet loading rate of 144 g/m3.h could be achieved in the ASD process by inserting moving media (MASD) at a volume ratio of 20% along with stimulation of bacteria with H2O2. The concentration of biosurfactant and peroxidase generated in the integrated process (H2O2-stimulated MASD reactor) was 3.7 and 2.5 times of that in the conventional ASD process. The maximum toluene elimination capacity obtained in the H2O2- stimulated MASD process was 285 g/m3.h at an inlet loading rate of around 430 g/m3.h. Accordingly, H2O2-mediated MASD process could be a promising technique for efficient biodegradation and mineralization of aromatic hydrocarbons in the contaminated air streams.
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Affiliation(s)
- Ehsan Aghayani
- Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Gholamreza Moussavi
- Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.
| | - Kazem Naddafi
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
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Rybarczyk P, Szulczyński B, Gębicki J, Hupka J. Treatment of malodorous air in biotrickling filters: A review. Biochem Eng J 2019. [DOI: 10.1016/j.bej.2018.10.014] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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11
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Yang C, Qian H, Li X, Cheng Y, He H, Zeng G, Xi J. Simultaneous Removal of Multicomponent VOCs in Biofilters. Trends Biotechnol 2018; 36:673-685. [DOI: 10.1016/j.tibtech.2018.02.004] [Citation(s) in RCA: 154] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 01/26/2018] [Accepted: 02/05/2018] [Indexed: 11/28/2022]
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12
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García-Galán MJ, Uggetti E, Garfi M, Olguín EJ, García J, Puigagut J. Biotechnology: a highly efficient tool for the current environmental challenges. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 616-617:1664-1667. [PMID: 29128123 DOI: 10.1016/j.scitotenv.2017.10.184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 10/18/2017] [Indexed: 06/07/2023]
Affiliation(s)
| | - Enrica Uggetti
- Universitat Politècnica de Catalunya-BarcelonaTech, Spain
| | - Marianna Garfi
- Universitat Politècnica de Catalunya-BarcelonaTech, Spain
| | | | - Joan García
- Universitat Politècnica de Catalunya-BarcelonaTech, Spain
| | - Jaume Puigagut
- Universitat Politècnica de Catalunya-BarcelonaTech, Spain
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