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Zhou X, Fernández-Palacios E, Dorado AD, Lafuente J, Gamisans X, Gabriel D. The effect of slime accumulated in a long-term operating UASB using crude glycerol to treat S-rich wastewater. J Environ Sci (China) 2024; 135:353-366. [PMID: 37778810 DOI: 10.1016/j.jes.2022.11.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 11/15/2022] [Accepted: 11/15/2022] [Indexed: 10/03/2023]
Abstract
An up-flow anaerobic sludge blanket (UASB) reactor targeting sulfate reduction was operated under a constant TOC/S-SO42- ratio of 1.5 ± 0.3 g C/g S for 639 days using crude glycerol as carbon source. A filamentous and fluffy flocculant material, namely slime-like substances (SLS), was gradually accumulated in the bioreactor after the cease of methanogenic activity. The accumulation of SLS was followed by a decrease in the removal efficiencies and a deterioration in the performance. Selected characteristics of SLS were investigated to explore the causes of its formation and the effect of SLS on the UASB performance. Results showed that glycerol fermentation and sulfate reduction processes taking place in the reactor were mainly accomplished in the bottom part of the UASB reactor, as the sludge concentration in the bottom was higher. The accumulation of SLS in the UASB reactor caused sludge flotation that further led to biomass washout, which decreased the sulfate and glycerol removal efficiencies. Batch activity tests performed with granular sludge (GS), slime-covered granular sludge (SCGS) and SLS showed that there was no difference between GS and SLS in the mechanism of glycerol fermentation and sulfate reduction. However, the specific sulfate reduction rate of GS was higher than that of SLS, while SLS showed a higher glycerol fermentation rate than that of GS. The different rates in GS and SLS were attributed to the higher relative abundances of fermentative microorganisms found in SLS and higher relative abundances of sulfate reducing bacteria (SRB) found in GS.
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Affiliation(s)
- Xudong Zhou
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Eva Fernández-Palacios
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Antoni D Dorado
- Department of Mining, Industrial and ICT Engineering, Universitat Politècnica de Catalunya, Avinguda de les Bases de Manresa 61-73, 08242 Manresa, Spain
| | - Javier Lafuente
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Xavier Gamisans
- Department of Mining, Industrial and ICT Engineering, Universitat Politècnica de Catalunya, Avinguda de les Bases de Manresa 61-73, 08242 Manresa, Spain
| | - David Gabriel
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.
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2
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Zhou X, Fernández-Palacios E, Dorado AD, Gamisans X, Gabriel D. Assessing main process mechanism and rates of sulfate reduction by granular biomass fed with glycerol under sulfidogenic conditions. CHEMOSPHERE 2022; 286:131649. [PMID: 34325258 DOI: 10.1016/j.chemosphere.2021.131649] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 07/16/2021] [Accepted: 07/21/2021] [Indexed: 06/13/2023]
Abstract
Sulfate-reducing bioreactors for sulfide production are the initial stage of processes targeting elemental sulfur recovery from sulfate-rich effluents. In this work, the principal reactions involved in glycerol fermentation and sulfate reduction using glycerol and its fermentation products as electron donors were assessed together with their specific consumption/production rates. A battery of batch activity tests with and without sulfate were performed with glycerol and with each fermentation product using a non-methanogenic but sulfidogenic granular sludge from an up-flow anaerobic sludge blanket (UASB) reactor operated under long-term while fed with crude glycerol. As a result, a mechanistic approach based on the experimental observations is proposed in this work. Glycerol was mainly fermented to 1,3-propanediol, ethanol, formate, propionate and acetate by fermentative bacteria. All organic intermediates were found to be further used by sulfate reducing bacteria (SRB) for sulfate reduction except for acetate. The most abundant genus detected under sulfidogenic conditions were Propionispora (15.2%), Dysgonomonas (13.2%), Desulfobulbus (11.6%) and Desulfovibrio (10.8%). The last two SRB genera accounted for 22.4% of the total amount of retrieved sequences, which were probably performing an incomplete oxidation of the carbon source in the sulfidogenic UASB reactor. As single substrates, specific sulfate reduction rates (SRRs) using low molecular weight (MW) carbon sources (formate and ethanol) were 39% higher than those using high-MW ones (propionate, 1,3-propanediol and butanol). However, SRRs in glycerol-fed tests showed that 1,3-propanediol played a major role in sulfate reduction in addition to formate and ethanol.
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Affiliation(s)
- X Zhou
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'enginyeria, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
| | - E Fernández-Palacios
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'enginyeria, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
| | - A D Dorado
- Department of Mining, Industrial and ICT Engineering, Universitat Politècnica de Catalunya, Avinguda de les Bases de Manresa 61-73, 08242, Manresa, Spain
| | - X Gamisans
- Department of Mining, Industrial and ICT Engineering, Universitat Politècnica de Catalunya, Avinguda de les Bases de Manresa 61-73, 08242, Manresa, Spain
| | - D Gabriel
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'enginyeria, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain.
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3
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Nogueira EW, Gouvêa de Godoi LA, Marques Yabuki LN, Brucha G, Zamariolli Damianovic MHR. Sulfate and metal removal from acid mine drainage using sugarcane vinasse as electron donor: Performance and microbial community of the down-flow structured-bed bioreactor. BIORESOURCE TECHNOLOGY 2021; 330:124968. [PMID: 33744733 DOI: 10.1016/j.biortech.2021.124968] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 03/04/2021] [Accepted: 03/05/2021] [Indexed: 06/12/2023]
Abstract
The down flow structured bed bioreactor (DFSBR) was applied to treat synthetic acid mine drainage (AMD) to reduce sulfate, increase the pH and precipitate metals in solutions (Co, Cu, Fe, Mn, Ni and Zn) using vinasse as an electron donor for sulfate-reducing bacteria (SRB). DFSBR achieved sulfate removal efficiencies between 55 and 91%, removal of Co and Ni were obtained with efficiencies greater than 80%, while Fe, Zn, Cu and Mn were removed with average efficiencies of 70, 80, 73 and 60%, respectively. Sulfate reduction increased pH from moderately acidic to 6.7-7.5. Modelling data confirmed the experimental results and metal sulfide precipitation was the mainly responsible for metal removal. The main genera responsible for sulfate and metal reduction were Geobacter and Desulfovibrio while fermenters were Parabacteroides and Sulfurovum. Moreover, in syntrophism with SRB, they played an important role in the efficiency of metal and sulfate removal.
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Affiliation(s)
- Elis Watanabe Nogueira
- Biological Processes Laboratory (LPB), São Carlos School of Engineering (EESC), University of São Paulo (USP), Av. João Dagnone, 1100, Santa Angelina, 13563-120 São Carlos, São Paulo, Brazil.
| | - Leandro Augusto Gouvêa de Godoi
- Biological Processes Laboratory (LPB), São Carlos School of Engineering (EESC), University of São Paulo (USP), Av. João Dagnone, 1100, Santa Angelina, 13563-120 São Carlos, São Paulo, Brazil
| | - Lauren Nozomi Marques Yabuki
- Institute of Geosciences and Exact Sciences (IGCE), São Paulo State University (UNESP), Av. 24 A, 1515 - Bela Vista, 13506-900 Rio Claro, São Paulo, Brazil
| | - Gunther Brucha
- Environmental Microbiology Laboratory, Institute of Science and Technology, Federal University of Alfenas, Rodovia José Aurélio Vilela, 11999 (BR 267 Km 533) Cidade Universitária, Poços de Caldas, Minas Gerais, Brazil
| | - Márcia Helena Rissato Zamariolli Damianovic
- Biological Processes Laboratory (LPB), São Carlos School of Engineering (EESC), University of São Paulo (USP), Av. João Dagnone, 1100, Santa Angelina, 13563-120 São Carlos, São Paulo, Brazil
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Loreto CD, Monge O, Martin AR, Ochoa-Herrera V, Sierra-Alvarez R, Almendariz FJ. Effect of carbon source and metal toxicity for potential acid mine drainage (AMD) treatment with an anaerobic sludge using sulfate-reduction. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2021; 83:2669-2677. [PMID: 34115621 DOI: 10.2166/wst.2021.163] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
This study compares sulfate-reduction performance in an anaerobic sludge with different carbon sources (ethanol, acetate, and glucose). Also, the toxic effect of copper was evaluated to assess its feasibility for possible acid mine drainage (AMD) treatment. Serological bottles with 1.5 g VSS/L and 150 mL of basal medium (0.67 g COD/g SO42- at a 7-8 pH) were used to determine the percentage of electron equivalents, maximum specific methanogenic (SMA), and sulfide generation activities (SGA). The copper effect was evaluated in a previously activated sludge in batch bioassays containing different concentrations of copper (0-50 mg/L), 3 gVSS/L, and 150 mL of basal medium (0.67 g COD/g SO42-). Carbon source bioassays with glucose obtained the best results in terms of the SGA (1.73 ± 0.34 mg S2-/g VSS•d) and SMA (10.41 mg COD-CH4/g VSS•d). The electron flow in the presence of glucose also indicated that 21.29 ± 5.2% of the metabolic activity of the sludge was directed towards sulfidogenesis. Copper toxicity bioassays indicated that a considerable decline in metabolic activity occurs above 10 mg/L. The 20%IC, 50%IC, and 80%IC were 4.5, 14.94, and 35.31 mg Cu/L. Compared to the other carbon sources tested, glucose proved to be a suitable electron donor since it favors sulfidogenesis. Finally, copper concentrations above 15 mg/L inhibited metabolic activity in the toxicity bioassays.
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Affiliation(s)
- C D Loreto
- Department of Chemical Engineering and Metallurgy, University of Sonora, Rosales and Luis Encinas Blvd., Hermosillo, Sonora, Mexico E-mail:
| | - O Monge
- Department of Chemical Engineering and Metallurgy, University of Sonora, Rosales and Luis Encinas Blvd., Hermosillo, Sonora, Mexico E-mail:
| | - A R Martin
- Department of Chemical Engineering and Metallurgy, University of Sonora, Rosales and Luis Encinas Blvd., Hermosillo, Sonora, Mexico E-mail:
| | - V Ochoa-Herrera
- Colegio de Ciencias e Ingenierías, Instituto Biósfera, Universidad San Francisco de Quito, Diego Robleas y Via Interoceanica, Quito, Ecuador and Department of Environmental Sciences and Engineering, Gillings School of Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
| | - R Sierra-Alvarez
- Department of Chemical and Environmental Engineering, University of Arizona, 210011, Tucson, Arizona, USA
| | - F J Almendariz
- Department of Chemical Engineering and Metallurgy, University of Sonora, Rosales and Luis Encinas Blvd., Hermosillo, Sonora, Mexico E-mail:
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5
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Costa RB, Godoi LAG, Braga AFM, Delforno TP, Bevilaqua D. Sulfate removal rate and metal recovery as settling precipitates in bioreactors: Influence of electron donors. JOURNAL OF HAZARDOUS MATERIALS 2021; 403:123622. [PMID: 33264855 DOI: 10.1016/j.jhazmat.2020.123622] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/19/2020] [Accepted: 07/27/2020] [Indexed: 06/12/2023]
Abstract
Four down-flow structured bed bioreactors were operated targeting biological sulfate-reduction and metal recovery. Three different electron donors were tested: glycerol (R1), lactate (R2), sucrose (R3), and a blend of the previous three (R4) with an increasing copper influent load (5, 15, and 30 mg Cu2+.L-1). Copper inhibited sulfate-reduction in R1 (15 mg Cu2+.L-1) and R3 (5 mg Cu2+.L-1), but the fermentative activity was not affected. R2 and R4 were not inhibited by the copper influent concentration. R2 provided the highest sulfate reduction rate (1767.3 ± 240.1 mg SO42-.L.day-1). Nonetheless, the accumulation of settling precipitates was 22 % higher in R4 than in R2, indicating the former yielded the highest metal recovery as settling precipitates (24.8 g FSS.L-1, 25 % Fe2+, 5% Cu2+). 16S rRNA sequencing showed highest diversity of sulfate-reducing bacteria in R2. A predominance of sulfate-reducing and fermentative bacteria with more similarity was observed between microbial populations in R1 and R4, despite the difference in toxicity thresholds. Hence, the electron donor influenced not only the biological sulfate reduction, but also metal toxicity thresholds and metal recovery as settling precipitates.
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Affiliation(s)
- Rachel Biancalana Costa
- Department of Biochemistry and Organic Chemistry, Institute of Chemistry, São Paulo State University, R. Francisco Degni, 55, 14800-060, Araraquara, SP, Brazil.
| | - Leandro Augusto Gouvea Godoi
- Biological Processes Laboratory, Department of Hydraulics and Sanitation, São Carlos School of Engineering (EESC), University of São Paulo (USP), Engenharia Ambiental - Bloco 4-F, 1100 João Dagnone Av. - Santa Angelina, 13.563-120, São Carlos, SP, Brazil
| | - Adriana Ferreira Maluf Braga
- Biological Processes Laboratory, Department of Hydraulics and Sanitation, São Carlos School of Engineering (EESC), University of São Paulo (USP), Engenharia Ambiental - Bloco 4-F, 1100 João Dagnone Av. - Santa Angelina, 13.563-120, São Carlos, SP, Brazil
| | - Tiago Palladino Delforno
- Laboratory of Environmental Microbiology, Department of Biology, Federal University of São Carlos, Rodovia João Leme dos Santos Km 110, Sorocaba, SP, 18052-780, Brazil
| | - Denise Bevilaqua
- Department of Biochemistry and Organic Chemistry, Institute of Chemistry, São Paulo State University, R. Francisco Degni, 55, 14800-060, Araraquara, SP, Brazil
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6
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Kumar M, Nandi M, Pakshirajan K. Recent advances in heavy metal recovery from wastewater by biogenic sulfide precipitation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 278:111555. [PMID: 33157464 DOI: 10.1016/j.jenvman.2020.111555] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 09/15/2020] [Accepted: 10/19/2020] [Indexed: 05/26/2023]
Abstract
Biological sulfide precipitation by sulfate reducing bacteria (SRB) is an emerging technique for the recovery of heavy metals from metal contaminated wastewater. Advantages of this technique include low capital cost, ability to form highly insoluble salts, and capability to remove and recover heavy metals even at very low concentrations. Therefore, sulfate reduction under anaerobic conditions has become a suitable alternative for the treatment of wastewaters that contain metals. However, bioreactor configurations for recovery of metals from sulfate rich metallic wastewater have not been explored widely. Moreover, the recovered metal sulfide nanoparticles could be applied in various fields such as solar cells, dye degradation, electroplating, etc. Hence, metal recovery in the form of nanoparticles from wastewater could serve as an incentive for industries. The simultaneous metal removal and recovery can be achieved in either a single-stage or multistage systems. This paper aims to present an overview of the different bioreactor configurations for the treatment of wastewater containing sulfate and metal along with their advantages and drawbacks for metal recovery. Currently followed biological strategies to mitigate sulfate and metal rich wastewater are evaluated in detail in this review.
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Affiliation(s)
- Manoj Kumar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India.
| | - Moumita Nandi
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Kannan Pakshirajan
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
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7
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Costa RB, Bevilaqua D, Lens PNL. Pre-treatment and temperature effects on the use of slow release electron donor for biological sulfate reduction. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 275:111216. [PMID: 32858270 DOI: 10.1016/j.jenvman.2020.111216] [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: 03/26/2020] [Revised: 07/28/2020] [Accepted: 08/07/2020] [Indexed: 06/11/2023]
Abstract
Lignocellulosic materials can be used as slow release electron donor (SRED) for biological sulfate reduction, potentially enhancing the subsequent metal sulfide precipitation. Lignocellulosic materials require a pre-treatment step in other biotechnological applications, but pre-treatment strategies for its use as a SRED for biological sulfate reduction have not yet been tested. Three pre-treatments strategies (mechanical, acid, and mechanical followed by acid pre-treatment) were tested to enhance electron donor release from brewery spent grain (BSG), and compared to a non-pre-treated control. Mechanical pre-treatment provided the highest sulfate removal rate (82.8 ± 8.8 mg SO42-.(g TVS.day)-1), as well as the highest final sulfide concentration (441.0 ± 34.4 mg.L-1) at mesophilic conditions. BSG submitted to mechanical pre-treatment was also assessed under psychrophilic and thermophilic conditions. Under mesophilic and psychrophilic conditions, both sulfate reduction and methane production occurred. Under psychrophilic conditions, the sulfate reduction rate was lower (25 ± 2.0 mg SO42-.(g TVS.day)-1), and the sulfide formation depended on lactate addition. A metal precipitation assay was conducted to assess whether the use of SRED enhances metal recovery. Zinc precipitation and recovery with chemical or biogenic sulfide from the BSG batches were tested. Sulfide was provided in a single spike or slowly added, mimicking the effect of SRED. ZnS was formed in all conditions, but better settling particles were obtained when sulfide was slowly added, regardless of the sulfide source.
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Affiliation(s)
- Rachel B Costa
- National University of Ireland, University Road, H91 TK33, Galway, Ireland; Department of Biochemistry and Organic Chemistry, Institute of Chemistry, São Paulo State University, R. Francisco Degni, 55, 14800-060, Araraquara, SP, Brazil.
| | - Denise Bevilaqua
- Department of Biochemistry and Organic Chemistry, Institute of Chemistry, São Paulo State University, R. Francisco Degni, 55, 14800-060, Araraquara, SP, Brazil
| | - Piet N L Lens
- National University of Ireland, University Road, H91 TK33, Galway, Ireland
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8
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Mora M, Fernández-Palacios E, Guimerà X, Lafuente J, Gamisans X, Gabriel D. Feasibility of S-rich streams valorization through a two-step biosulfur production process. CHEMOSPHERE 2020; 253:126734. [PMID: 32302909 DOI: 10.1016/j.chemosphere.2020.126734] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 03/19/2020] [Accepted: 04/04/2020] [Indexed: 06/11/2023]
Abstract
A bioscrubbing process named SONOVA has been developed, tested and assessed herein to valorize flue gases containing SOx. The process consists in a first scrubbing stage, to absorb and oxidize SO2 to sulfate, followed by a two-step biological stage. It consists of (1) an up-flow anaerobic sludge (UASB) reactor to reduce sulfate to sulfide with crude glycerol and (2) a continuous stirred tank reactor (CSTR) to partially oxidize sulfide to elemental sulfur (S0). SONOVA integrates the reutilization of resources, using the effluent of the biological stage as a sorbent agent and the residual heat of flue gases to dry the product. S0 is then obtained as a value-added product, which nowadays is produced from fossil fuels. In this research, SO2 concentrations up to 4000 ppmv were absorbed in 2 s of gas contact time in the spray-scrubber with removal efficiencies above 80%. The UASB reduced up to 9.3 kg S-Sulfate m-3 d-1 with sulfide productivities of 6 kg S m-3 d-1 at an hydraulic retention time (HRT) as low as 2 h. Finally, CSTR was fed with the UASB effluent and operated at HRT ranging from 12 h to 4 h without biomass wash-out. Sulfide was fully oxidized to S0 with a productivity of 2.3 kg S m-3 d-1 at the lowest HRT tested. Overall, this research has explored not only maximum capabilities of each SONOVA stage but has also assessed the interactions between the different units, which opens up the possibility of recovering S0 from harmful SOx emissions, optimizing resources utilization and costs.
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Affiliation(s)
- M Mora
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'enginyeria, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain.
| | - E Fernández-Palacios
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'enginyeria, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
| | - X Guimerà
- Department of Mining Industrial and ICT Engineering, Universitat Politècnica de Catalunya, Avinguda de les Bases de Manresa 61-73, 08240, Manresa, Spain
| | - J Lafuente
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'enginyeria, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
| | - X Gamisans
- Department of Mining Industrial and ICT Engineering, Universitat Politècnica de Catalunya, Avinguda de les Bases de Manresa 61-73, 08240, Manresa, Spain
| | - D Gabriel
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'enginyeria, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
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9
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Abdullah M, Nelson RJ, Kittilstved KR. On the formation of superoxide radicals on colloidal ATiO 3 (A = Sr and Ba) nanocrystal surfaces. NANOSCALE ADVANCES 2020; 2:1949-1955. [PMID: 36132499 PMCID: PMC9417813 DOI: 10.1039/d0na00106f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 04/15/2020] [Indexed: 06/15/2023]
Abstract
Controlling the surface chemistry of colloidal semiconductor nanocrystals is critical to exploiting their rich electronic structures for various technologies. We recently demonstrated that the hydrothermal synthesis of colloidal nanocrystals of SrTiO3, a technologically-relevant electronic material, provided a strong negative correlation between the presence of an O2-related surface defect and hydrazine hydrate [W. L. Harrigan, S. E. Michaud, K. A. Lehuta, and K. R. Kittilstved, Chem. Mater., 2016, 28(2), 430]. When hydrazine hydrate is omitted during the aerobic hydrothermal synthesis, the surface defect is observed. However, it can be removed by either the addition of hydrazine hydrate or by purging the reaction solution with argon gas before the hydrothermal synthesis. We also propose that the formation of the O2-related defect is mediated by the reduction of dissolved O2 by lactate anions that are present from the titanium precursor. This work helps elucidate the nature of the O2-related defect as a superoxide anion and presents a mechanism to explain its formation during the hydrothermal synthesis of SrTiO3 and related BaTiO3 nanocrystals.
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Affiliation(s)
- Muhammad Abdullah
- Department of Chemistry, University of Massachusetts Amherst 710 N Pleasant St, Amherst MA 01003 USA
| | - Ruby J Nelson
- Department of Chemistry, University of Massachusetts Amherst 710 N Pleasant St, Amherst MA 01003 USA
| | - Kevin R Kittilstved
- Department of Chemistry, University of Massachusetts Amherst 710 N Pleasant St, Amherst MA 01003 USA
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10
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Xu YN, Chen Y. Advances in heavy metal removal by sulfate-reducing bacteria. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2020; 81:1797-1827. [PMID: 32666937 DOI: 10.2166/wst.2020.227] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Industrial development has led to generation of large volumes of wastewater containing heavy metals, which need to be removed before the wastewater is released into the environment. Chemical and electrochemical methods are traditionally applied to treat this type of wastewater. These conventional methods have several shortcomings, such as secondary pollution and cost. Bioprocesses are gradually gaining popularity because of their high selectivities, low costs, and reduced environmental pollution. Removal of heavy metals by sulfate-reducing bacteria (SRB) is an economical and effective alternative to conventional methods. The limitations of and advances in SRB activity have not been comprehensively reviewed. In this paper, recent advances from laboratory studies in heavy metal removal by SRB were reported. Firstly, the mechanism of heavy metal removal by SRB is introduced. Then, the factors affecting microbial activity and metal removal efficiency are elucidated and discussed in detail. In addition, recent advances in selection of an electron donor, enhancement of SRB activity, and improvement of SRB tolerance to heavy metals are reviewed. Furthermore, key points for future studies of the SRB process are proposed.
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Affiliation(s)
- Ya-Nan Xu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China E-mail:
| | - Yinguang Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China E-mail: ; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
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11
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Trabue SL, Kerr BJ, Scoggin KD. Swine diets impact manure characteristics and gas emissions: Part II sulfur source. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 689:1115-1124. [PMID: 31466151 DOI: 10.1016/j.scitotenv.2019.06.272] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 06/07/2019] [Accepted: 06/17/2019] [Indexed: 06/10/2023]
Abstract
Sulfur is a key nutrient in swine diets and is associated with hydrogen sulfide (H2S) emissions, odor, and respiratory distress of animals. Due to potential increases in S levels in swine diets by using alternative feedstuffs, a feeding trial study was conducted to determine the effect of dietary S source has on manure slurry chemical properties and gas emissions. A total of 24 gilts averaging 139 kg BW were fed a control diet formulated with corn and soybean meal (CSBM) containing 1.80 g S kg-1 or diets containing 3.50 g S kg-1 feed as supplied by calcium sulfate (CaSO4), distillers dried grains with solubles (DDGS), or feather meal (CFM). Diets were fed for 41 d with an ADFI of 2.70 kg/d. Feces and urine were collected twice daily after each feeding and added to the manure storage containers. At the end of the study, manure slurries were monitored for gas emissions and chemical properties. Dietary S source had a significant effect on excretion of DM, C, N, and S in manure. Pigs fed the diets containing DDGS had significantly higher levels of NH3, VFAs, and phenols in manure compared to pigs fed the CSBM diet. Pigs fed diets with organic S (i.e., DDGS and CFM) had lower emissions of H2S compared to pigs fed the diet with inorganic sulfur (CaSO4). In contrast, there were no significant differences in C or N emissions as affected by dietary treatment. Odor and odorant emissions differed by dietary treatment, with pigs fed the CFM diet having the highest odor emissions as compared to pigs fed the control CSBM diet. Pigs fed diets containing CFM and DDGS had a greater percentage of their chemical odor associated with volatile organic compounds while animals fed the CSBM diet or the diet with CaSO4 had greater percentage associated with H2S emissions.
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Affiliation(s)
- S L Trabue
- USDA-ARS National Laboratory for Agriculture and the Environment, Ames, IA 50011, United States of America.
| | - B J Kerr
- USDA-ARS National Laboratory for Agriculture and the Environment, Ames, IA 50011, United States of America
| | - K D Scoggin
- USDA-ARS National Laboratory for Agriculture and the Environment, Ames, IA 50011, United States of America
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Trabue SL, Kerr BJ, Scoggin KD. Swine diets impact manure characteristics and gas emissions: Part I sulfur level. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 687:800-807. [PMID: 31412483 DOI: 10.1016/j.scitotenv.2019.06.130] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 05/21/2019] [Accepted: 06/08/2019] [Indexed: 06/10/2023]
Abstract
Sulfur is an essential nutrient for animal growth but is also associated with odor and morbidity of animals from swine operations. A study was conducted to determine the effects of increasing dietary S levels in swine diets on DM, pH, C, N, S, VFA, indole, and phenol concentrations in the manure, and on the emissions of C-, N-, and S-containing gases. A total of 24 gilts averaging 152 kg BW were fed diets containing 0.19, 0.30, 0.43, or 0.64% dietary S, as supplied by CaSO4, for 31 d, with an ADFI of 3.034 kg d-1. Feces and urine were collected after each feeding and added to manure storage containers. At the end of the study, manure slurries were monitored for gas emissions and chemical properties. Increasing dietary S lowered manure pH by 0.3 units and increased DM, N, and S by 10% for each 1.0 g S increase kg-1 feed intake. Increased dietary S increased NH3, sulfide, butanoic, and pentanoic acid concentrations in manure. Carbon and N emissions were not significantly impacted by dietary S, but S emissions in the form of hydrogen sulfide (H2S) increased by 8% for each 1.0 g S increase kg-1 feed intake. Odor increased by 2% for each 1.0 g increase of S consumed kg-1 feed intake. Phenolic compounds and H2S were the major odorants emitted from manure that increased with increasing dietary S.
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Affiliation(s)
- S L Trabue
- USDA-ARS National Laboratory for Agriculture and the Environment, Ames, IA 50011, United States of America.
| | - B J Kerr
- USDA-ARS National Laboratory for Agriculture and the Environment, Ames, IA 50011, United States of America
| | - K D Scoggin
- USDA-ARS National Laboratory for Agriculture and the Environment, Ames, IA 50011, United States of America
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13
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Giordani A, Hayashi EA, Rodriguez RP, Damasceno LHS, Azevedo H, Brucha G. POTENTIAL OF AUTOCHTHONOUS SULFATE-REDUCING MICROBIAL COMMUNITIES FOR TREATING ACID MINE DRAINAGE IN A BENCH-SCALE SULFIDOGENIC REACTOR. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2019. [DOI: 10.1590/0104-6632.20190362s20170662] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Niño de Guzmán GT, Hapeman CJ, Millner PD, McConnell LL, Jackson D, Kindig D, Torrents A. Using a high-organic matter biowall to treat a trichloroethylene plume at the Beaver Dam Road landfill. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:8735-8746. [PMID: 29327189 DOI: 10.1007/s11356-017-1137-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Accepted: 12/26/2017] [Indexed: 06/07/2023]
Abstract
Trichloroethylene (TCE) is a highly effective industrial degreasing agent and known carcinogen. It was frequently buried improperly in landfills and has subsequently become one of the most common groundwater and soil contaminants in the USA. A common strategy to remediate TCE-contaminated sites and to prevent movement of the TCE plumes into waterways is to construct biowalls which consist of biomaterials and amendments to enhance biodegradation. This approach was chosen to contain a TCE plume emanating from a closed landfill in Maryland. However, predicting the effectiveness of biowalls is often site specific. Therefore, we conducted an extensive series of batch reactor studies at 12 °C as opposed to the typical room temperature to examine biowall fill-material combinations including the effects of zero-valent iron (ZVI) and glycerol amendments. No detectable TCE was observed after several months in the laboratory study when using the unamended 4:3 mulch-to-compost combination. In the constructed biowall, this mixture reduced the upstream TCE concentration by approximately 90% and generated ethylene downstream, an indication of successful reductive dechlorination. However, the more toxic degradation product vinyl chloride (VC) was also detected downstream at levels approximately ten times greater than the maximum contaminant level. This indicates that incomplete degradation also occurred. In the laboratory, ZVI reduced VC formation. A hazard quotient was calculated for the landfill site with and without the biowall. The addition of the biowall decreased the hazard quotient by 88%.
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Affiliation(s)
| | - Cathleen J Hapeman
- US Department of Agriculture, Agricultural Research Service, Beltsville, MD, USA
| | - Patricia D Millner
- US Department of Agriculture, Agricultural Research Service, Beltsville, MD, USA
| | - Laura L McConnell
- Department of Civil and Environmental Engineering, University of Maryland, College Park, MD, USA
| | - Dana Jackson
- US Department of Agriculture, Agricultural Research Service, Beltsville, MD, USA
| | | | - Alba Torrents
- Department of Civil and Environmental Engineering, University of Maryland, College Park, MD, USA.
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15
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Santos SC, Liebensteiner MG, van Gelder AH, Dimitrov MR, Almeida PF, Quintella CM, Stams AJM, Sánchez-Andrea I. Bacterial glycerol oxidation coupled to sulfate reduction at neutral and acidic pH. J GEN APPL MICROBIOL 2017; 64:1-8. [PMID: 29187682 DOI: 10.2323/jgam.2017.02.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Glycerol is a main co-product of biodiesel production. Crude glycerol may serve as a cheap and attractive substrate in biotechnological applications, e.g. for the production of valuable chemicals or as an electron donor for reduction processes. In this work, sulfate reduction with glycerol was studied at neutral and acidic pH using bioreactor sludge samples and Tinto River sediments as a source of inoculum, respectively. Communities of sulfate-reducing bacteria (SRB) and fermentative bacteria were co-enriched at both pH values. Molecular analyses revealed that sequences belonging to Desulfomicrobium genus were dominant in the cultures enriched at pH 7, while Desulfosporosinus sequences dominated in the culture enriched at pH 4. Glycerol conversion was coupled to sulfate reduction, but the substrate was incompletely oxidized to acetate in the neutrophilic enrichments, and acetate, lactate, and 1,3-propanediol under low pH conditions. Two strains belonging to Desulfomicrobium and Proteiniphilum genera were isolated from the neutrophilic enrichments, but the first isolate was not able to use glycerol, which suggests a syntrophic relationship between glycerol-degrading fermentative bacteria and SRB. A Clostridium strain able to grow with glycerol was isolated from the low pH enrichment. Our data indicate that glycerol promotes the growth of sulfate-reducing communities to form sulfide, which can be used to precipitate and recover heavy metals.
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Affiliation(s)
- Sidnei C Santos
- Laboratory of Microbiology, Wageningen University.,Studies Institute in Health and Biological, Federal University of South and Southeast of Pará
| | | | | | | | - Paulo F Almeida
- Laboratory of Biotechnology and Ecology of Microorganisms, Department of Bio-Interaction Sciences, Federal University of Bahia
| | - Cristina M Quintella
- Laboratory of Kinetic and Molecular Dynamic, Institute of Chemistry, Federal University of Bahia
| | - Alfons J M Stams
- Laboratory of Microbiology, Wageningen University.,Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho
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