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Marais TS, Huddy RJ, Harrison STL. Elemental sulphur recovery from a sulphate-rich aqueous stream in a single hybrid linear flow channel reactor is mediated through microbial community dynamics and adaptation to reactor zones. FEMS Microbiol Ecol 2022; 98:6763417. [PMID: 36259757 DOI: 10.1093/femsec/fiac059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 04/20/2022] [Accepted: 10/03/2022] [Indexed: 01/21/2023] Open
Abstract
The coupled application of biological sulphate reduction (BSR) and partial sulphide oxidation to treat sulphate-rich wastewater is an effective strategy to mitigate pollution and recover elemental sulphur for repurposing. The recent development of the hybrid linear flow channel reactor (LFCR) achieves simultaneous BSR and partial sulphide oxidation with biosulphur recovery via a floating sulphur biofilm (FSB). Here, we explore the microbial community zoning and dynamics facilitating the process. A total of three continuous LFCRs were used to evaluate the effect of reactor zones, hydraulic residence time (HRT), carbon source, namely lactate and acetate, as well as reactor geometry and scale on process performance and microbial community dynamics. Community composition of sessile and planktonic microbial consortia were resolved at a 5- and 2-day HRT through 16S rRNA amplicon sequencing. Preferential attachment and prevalence of specific phylotypes within the sessile and planktonic communities revealed clear adaptation of key microorganisms to different microenvironments. Key microbial taxa affiliated with sulphate reduction and sulphide oxidation as well as those implicated in fermentation and syntrophic metabolism, fluctuated in response to changes in HRT and process performance. Through understanding the relationship between microbial community dynamics and process performance, this research will inform better process design and optimization of the hybrid LFCR.
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Affiliation(s)
- T S Marais
- Centre for Bioprocess Engineering Research, Department of Chemical Engineering, University of Cape Town, Private Bag X1, Rondebosch 7701, South Africa.,Future Water Institute, 1 Madiba Circle, University of Cape Town, 7700, South Africa
| | - R J Huddy
- Centre for Bioprocess Engineering Research, Department of Chemical Engineering, University of Cape Town, Private Bag X1, Rondebosch 7701, South Africa.,Future Water Institute, 1 Madiba Circle, University of Cape Town, 7700, South Africa
| | - S T L Harrison
- Centre for Bioprocess Engineering Research, Department of Chemical Engineering, University of Cape Town, Private Bag X1, Rondebosch 7701, South Africa.,Future Water Institute, 1 Madiba Circle, University of Cape Town, 7700, South Africa
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2
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Villegas-Plazas M, Sanabria J, Arbeli Z, Vasquez Y, Roldan F, Junca H. Metagenomic Analysis of Biochemical Passive Reactors During Acid Mine Drainage Bioremediation Reveals Key Co-selected Metabolic Functions. MICROBIAL ECOLOGY 2022; 84:465-472. [PMID: 34591135 DOI: 10.1007/s00248-021-01872-y] [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: 03/09/2021] [Accepted: 09/13/2021] [Indexed: 06/13/2023]
Abstract
Acid mine drainage (AMD) is the major pollutant generated by the mining industry, and it is characterized by low pH and high concentration of metals and sulfate. The use of biochemical passive reactors (BPRs) is a promising strategy for its bioremediation. To date, there are various studies describing the taxonomical composition of BPR microbial communities, generally consisting of an assemblage of sulfate-reducing organisms inside Deltaproteobacteria, and a diverse set of anaerobic (ligno)cellulolytic bacteria; however, insights about its functional metagenomic content are still scarce. In previous studies, a laboratory-scale AMD bioremediation using biochemical passive reactors was designed and performed, tracking operation parameters, chemical composition, and changes, together with taxonomic composition of the microbiomes harbored in these systems. In order to reveal the main functional content of these communities, we used shotgun metagenomics analyses to explore genes of higher relative frequencies and their inferred functions during the AMD bioremediation from three BPRs representing the main microbiome compositions detected in the system. Remarkably, genes encoding for two-component regulatory systems and ABC transporters related to metal and inorganic ions, cellulose degradation enzymes, dicarboxylic acid production, and sulfite reduction complex were all detected at increased frequency. Our results evidenced that higher taxonomic diversity of the microbiome was arising together with a functional redundancy of the specific metabolic roles, indicating its co-selection and suggesting that its enrichment on BPRs may be implicated in the cumulative efficiency of these systems.
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Affiliation(s)
- Marcela Villegas-Plazas
- Environmental Microbiology and Biotechnology Laboratory, Engineering School of Environmental & Natural Resources, Engineering Faculty, Universidad del Valle, Cali, Colombia
- RG Microbial Ecology: Metabolism, Genomics & Evolution, Div. Ecogenomics & Holobionts, Microbiomas Foundation, LT11A, 250008, Chia, Colombia
| | - Janeth Sanabria
- Environmental Microbiology and Biotechnology Laboratory, Engineering School of Environmental & Natural Resources, Engineering Faculty, Universidad del Valle, Cali, Colombia
| | - Ziv Arbeli
- Departamento de Biología, Unidad de Saneamiento y Biotecnología Ambiental USBA, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Yaneth Vasquez
- Departamento de Ciencias Naturales, Facultad de Ingeniería y Ciencias Básicas, Universidad Central, Carrera 5 No. 21-38, Bogotá, Colombia
| | - Fabio Roldan
- Departamento de Biología, Unidad de Saneamiento y Biotecnología Ambiental USBA, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Howard Junca
- RG Microbial Ecology: Metabolism, Genomics & Evolution, Div. Ecogenomics & Holobionts, Microbiomas Foundation, LT11A, 250008, Chia, Colombia.
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3
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Hessler T, Harrison STL, Huddy RJ. Integrated Kinetic Modelling and Microbial Profiling Provide Insights Into Biological Sulfate-Reducing Reactor Design and Operation. Front Bioeng Biotechnol 2022; 10:897094. [PMID: 35845424 PMCID: PMC9277144 DOI: 10.3389/fbioe.2022.897094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 06/01/2022] [Indexed: 11/27/2022] Open
Abstract
Biological sulfate reduction (BSR) is an attractive approach for the bioremediation of sulfate-rich wastewater streams. Many sulfate-reducing microorganisms (SRM), which facilitate this process, have been well-studied in pure culture. However, the role of individual members of microbial communities within BSR bioreactors remains understudied. In this study we investigated the performance of two up-flow anaerobic packed bed reactors (UAPBRs) supplemented primarily with acetate and with lactate, respectively, during a hydraulic retention time (HRT) study set up to remediate sulfate-rich synthetic wastewater over the course of 1,000 + days. Plug-flow hydrodynamics led to a continuum of changing volumetric sulfate reduction rates (VSRRs), available electron donors, degrees of biomass retention and compositions of microbial communities throughout these reactors. Microbial communities throughout the successive zones of the reactors were resolved using 16S rRNA gene amplicon sequencing which allowed the association of features of performance with discrete microorganisms. The acetate UAPBR achieved a maximum VSRR of 23.2 mg.L−1. h−1 at a one-day HRT and a maximum sulfate conversion of the 1 g/L sulfate of 96% at a four-day HRT. The sulfate reduction reactions in this reactor could be described with a reaction order of 2.9, an important observation for optimisation and future scale-up. The lactate UAPBR achieved a 96% sulfate conversion at one-day HRT, corresponding with a VSRR of 40.1 mg.L−1. h−1. Lactate was supplied in this reactor at relatively low concentrations necessitating the subsequent use of propionate and acetate, by-products of lactate fermentation with acetate also a by-product of incomplete lactate oxidation, to achieve competitive performance. The consumption of these electron donors could be associated with specific SRM localised within biofilms of discrete zones. The sulfate reduction rates in the lactate UAPBR could be modelled as first-order reactions, indicating effective rates were conferred by these propionate- and acetate-oxidising SRM. Our results demonstrate how acetate, a low-cost substrate, can be used effectively despite low associated SRM growth rates, and that lactate, a more expensive substrate, can be used sparingly to achieve high VSRR and sulfate conversions. We further identified the preferred environment of additional microorganisms to inform how these microorganisms could be enriched or diminished in BSR reactors.
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Affiliation(s)
- Tomas Hessler
- Department of Chemical Engineering, Centre for Bioprocess Engineering Research (CeBER), University of Cape Town, Cape Town, South Africa
| | - Susan T L Harrison
- Department of Chemical Engineering, Centre for Bioprocess Engineering Research (CeBER), University of Cape Town, Cape Town, South Africa.,Future Water Institute, University of Cape Town, Cape Town, South Africa
| | - Robert J Huddy
- Department of Chemical Engineering, Centre for Bioprocess Engineering Research (CeBER), University of Cape Town, Cape Town, South Africa.,Future Water Institute, University of Cape Town, Cape Town, South Africa
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4
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Vásquez Y, Galvis JA, Pazos J, Vera C, Herrera O. Acid mine drainage treatment using zero-valent iron nanoparticles in biochemical passive reactors. ENVIRONMENTAL TECHNOLOGY 2022; 43:1988-2001. [PMID: 33308050 DOI: 10.1080/09593330.2020.1864024] [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: 07/22/2020] [Accepted: 12/03/2020] [Indexed: 06/12/2023]
Abstract
Acid mine drainage (AMD) is the major effluent generated from metal and coal mines, causing serious ecological risks and degradation of aquatic habitats and surrounding soil quality. Biochemical passive reactors (BPRs) are an option for improving AMD affected water. This study investigates the effect of the size and concentration of zerovalent iron nanoparticles (nZVI) on the efficiency of batch BPRs during AMD remediation. Atomic force microscopy (AFM) and transmission electron microscopy (TEM) were also used as complementary techniques for the investigation of the changes in microbial cells and nZVI properties after the AMD remediation. The results from the batch experiment showed that the concentration of nZVI increases the pH and decreases ORP during AMD treatment, thus favouring the removal of metals. The results also suggest that metal sulfide precipitation occurred in all the batch with reactive mixture but was greater in reactors amended with nZVI of larger size. This study revealed that the presence of nZVI in the BPR leads to metal removal as well as the inhibition of sulfate-reducing bacteria (SRB) activity. Microscopy study indicated that the addition of nZVI creates a morphological change on certain microorganisms in which the cellular membrane was fully covered with nZVI, inducing cell lysis process. These results show that nZVI is a promising reactive material for the treatment of AMD in BPR systems.
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Affiliation(s)
- Yaneth Vásquez
- Faculty of Engineering and Basic Sciences, Department of Natural Sciences, Universidad Central, Bogotá, Colombia
| | - José A Galvis
- Faculty of Engineering and Basic Sciences, Department of Natural Sciences, Universidad Central, Bogotá, Colombia
| | - Jhon Pazos
- Convergence Science and Technology Cluster, Universidad Central, Bogotá, Colombia
| | - Camila Vera
- Faculty of Engineering and Basic Sciences, Department of Natural Sciences, Universidad Central, Bogotá, Colombia
| | - Oscar Herrera
- Faculty of Engineering and Basic Sciences, Department of Natural Sciences, Universidad Central, Bogotá, Colombia
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5
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Miranda EM, Severson C, Reep JK, Hood D, Hansen S, Santisteban L, Hamdan N, Delgado AG. Continuous-mode acclimation and operation of lignocellulosic sulfate-reducing bioreactors for enhanced metal immobilization from acidic mining-influenced water. JOURNAL OF HAZARDOUS MATERIALS 2022; 425:128054. [PMID: 34986575 DOI: 10.1016/j.jhazmat.2021.128054] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 11/22/2021] [Accepted: 12/07/2021] [Indexed: 06/14/2023]
Abstract
Lignocellulosic sulfate-reducing bioreactors are an inexpensive passive approach for treatment of mining-influenced water (MIW). Typically, microbial community acclimation to MIW involves bioreactor batch-mode operation to initiate lignocellulose hydrolysis and fermentation and provide electron donors for sulfate-reducing bacteria. However, batch-mode operation could significantly prolong bioreactor start-up times (up to several months) and select for slow-growing microorganisms. In this study we assessed the feasibility of bioreactor continuous-mode acclimation to MIW (pH 2.5, 6.5 mM SO42-, 18 metal(loid)s) as an alternate start-up method. Results showed that bioreactors with spent brewing grains and sugarcane bagasse achieved acclimation in continuous mode at hydraulic retention times (HRTs) of 7-12-d within 16-22 days. During continuous-mode acclimation, extensive SO42- reduction (80 ± 20% -91 ± 3%) and > 98% metal(loid) removal was observed. Operation at a 3-d HRT further yielded a metal(loid) removal of 97.5 ± 1.3 -98.8 ± 0.9% until the end of operation. Sulfate-reducing microorganisms were detected closer to the influent in the spent brewing grains bioreactors, and closer to the effluent in the sugarcane bagasse bioreactors, giving insight as to where SO42- reduction was occurring. Results strongly support that a careful selection of lignocellulose and bioreactor operating parameters can bypass typical batch-mode acclimation, shortening bioreactor start-up times and promoting effective MIW metal(loid) immobilization and treatment.
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Affiliation(s)
- Evelyn M Miranda
- Swette Center for Environmental Biotechnology, Biodesign Institute, Arizona State University, 1001 S McAllister Ave, Tempe, AZ 85287, United States; Center for Bio-mediated & Bio-inspired Geotechnics, Arizona State University, 425 E University Dr, Tempe, AZ 85281, United States; School for Engineering of Matter, Transport and Energy, Arizona State University, 501 E Tyler Mall, Tempe, AZ 85281, United States
| | - Carli Severson
- Swette Center for Environmental Biotechnology, Biodesign Institute, Arizona State University, 1001 S McAllister Ave, Tempe, AZ 85287, United States; Center for Bio-mediated & Bio-inspired Geotechnics, Arizona State University, 425 E University Dr, Tempe, AZ 85281, United States
| | - Jeffrey K Reep
- Swette Center for Environmental Biotechnology, Biodesign Institute, Arizona State University, 1001 S McAllister Ave, Tempe, AZ 85287, United States; Center for Bio-mediated & Bio-inspired Geotechnics, Arizona State University, 425 E University Dr, Tempe, AZ 85281, United States; School of Sustainable Engineering and the Built Environment, Arizona State University, 660 S College Ave, Tempe, AZ 85281, United States
| | - Daniel Hood
- Swette Center for Environmental Biotechnology, Biodesign Institute, Arizona State University, 1001 S McAllister Ave, Tempe, AZ 85287, United States; Center for Bio-mediated & Bio-inspired Geotechnics, Arizona State University, 425 E University Dr, Tempe, AZ 85281, United States
| | - Shane Hansen
- Freeport-McMoRan Inc., 800 E Pima Mine Rd, Sahuarita, AZ 85629, United States
| | - Leonard Santisteban
- Freeport-McMoRan Inc., 800 E Pima Mine Rd, Sahuarita, AZ 85629, United States
| | - Nasser Hamdan
- Swette Center for Environmental Biotechnology, Biodesign Institute, Arizona State University, 1001 S McAllister Ave, Tempe, AZ 85287, United States; Center for Bio-mediated & Bio-inspired Geotechnics, Arizona State University, 425 E University Dr, Tempe, AZ 85281, United States; School of Sustainable Engineering and the Built Environment, Arizona State University, 660 S College Ave, Tempe, AZ 85281, United States
| | - Anca G Delgado
- Swette Center for Environmental Biotechnology, Biodesign Institute, Arizona State University, 1001 S McAllister Ave, Tempe, AZ 85287, United States; Center for Bio-mediated & Bio-inspired Geotechnics, Arizona State University, 425 E University Dr, Tempe, AZ 85281, United States; School of Sustainable Engineering and the Built Environment, Arizona State University, 660 S College Ave, Tempe, AZ 85281, United States.
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6
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Vasquez Y, Neculita CM, Caicedo G, Cubillos J, Franco J, Vásquez M, Hernández A, Roldan F. Passive multi-unit field-pilot for acid mine drainage remediation: Performance and environmental assessment of post-treatment solid waste. CHEMOSPHERE 2022; 291:133051. [PMID: 34826441 DOI: 10.1016/j.chemosphere.2021.133051] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 11/10/2021] [Accepted: 11/22/2021] [Indexed: 06/13/2023]
Abstract
This study evaluated the performance of a passive multi-unit field-pilot operating for 16 months to treat acid mine drainage (AMD) from a coal mine in Colombia Andean Paramo. The multi-unit field-pilot involved a combination of a pre-treatment unit (550 L) filled with dispersed alkaline substrate (DAS), and six passive biochemical reactors (PBRs; 220 L) under two configurations: open (PBRs-A) and closed (PBRs-B) to the atmosphere. The AMD quality was 1200 ± 91 mg L-1 Fe, 38.0 ± 1.3 mg L-1 Mn, 8.5 ± 1.6 mg L-1 Zn, and 3200 ± 183.8 mg L-1 SO42-, at pH 2.8. The input and output effluents were monitored to establish AMD remediation. Physicochemical stability of the post-treatment solids, including metals (Fe2+, Zn2+, and Mn2+) and sulfates for environmental contamination from reactive mixture post-treatment, was also assessed. The passive multi-unit field-pilot achieved a total removal of 74% SO42-, 63% Fe2+, and 48% Mn2+ with the line of PBRs-A, and 91% SO42-, 80% Fe2+, and 66% Mn2+ with the line of PBRs-B, as well as 99% removal for Zn2+ without significant differences (p < 0.05) between the two lines. The study of the physicochemical stability of the post-treatment solids showed they can produce acidic leachates that could release large quantities of Fe and Mn, if they are disposed in oxidizing conditions; contact with water or any other leaching solutions must be avoided. Therefore, these post-treatment solids cannot be disposed of in a municipal landfill. The differences in configuration between PBRs, open or closed to the atmosphere, induced changes in the performance of the passive multi-unit field-pilot during AMD remediation.
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Affiliation(s)
- Yaneth Vasquez
- Facultad de Ingenieria y Ciencias Basicas, Universidad Central, Cra. 5 No. 21-38, Bogotá, Colombia.
| | - Carmen M Neculita
- Research Institute on Mines and Environment (RIME), University of Quebec in Abitibi-Temiscamingue (UQAT), 445 Boulevard de l'Universite, Rouyn-Noranda, QC, J9X 5E4, Canada
| | - Gerardo Caicedo
- Grupo de Catálisis (GC-UPTC), Escuela de Ciencias Químicas, Facultad de Ciencias, Universidad Pedagógica y Tecnológica de Colombia (UPTC), Avenida Central del Norte No. 39-115, Tunja, Colombia
| | - Jairo Cubillos
- Grupo de Catálisis (GC-UPTC), Escuela de Ciencias Químicas, Facultad de Ciencias, Universidad Pedagógica y Tecnológica de Colombia (UPTC), Avenida Central del Norte No. 39-115, Tunja, Colombia
| | - Jair Franco
- Facultad de Ingenieria y Ciencias Basicas, Universidad Central, Cra. 5 No. 21-38, Bogotá, Colombia
| | - Mario Vásquez
- Facultad de Ingenieria y Ciencias Basicas, Universidad Central, Cra. 5 No. 21-38, Bogotá, Colombia
| | - Angie Hernández
- Grupo de Catálisis (GC-UPTC), Escuela de Ciencias Químicas, Facultad de Ciencias, Universidad Pedagógica y Tecnológica de Colombia (UPTC), Avenida Central del Norte No. 39-115, Tunja, Colombia
| | - Fabio Roldan
- Unidad de Saneamiento y Biotecnología Ambiental (USBA), Departamento de Biología, Pontificia Universidad Javeriana, Cra. 7 No. 40-62, Bogotá, Colombia
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Makhathini TP, Mulopo J, Bakare BF. Sulfidogenic fluidized-bed bioreactor kinetics for co-treatment of hospital wastewater and acid mine drainage. ACTA ACUST UNITED AC 2021; 32:e00683. [PMID: 34745909 PMCID: PMC8551841 DOI: 10.1016/j.btre.2021.e00683] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 09/05/2021] [Accepted: 10/06/2021] [Indexed: 11/05/2022]
Abstract
Bioremediation process for acidic mine water co-treatment with hospital wastewater. Metal precipitation reached 98% and soluble concentrations of Fe and Zn were less than 0.1 mg/l. SO42− removal was above 90% in the sulfidogenic bioreactor. Naproxen, ibuprofen, ketoprofen, and diclofenac partially removed during the co-treatment process.
A passive co-treatment of acid mine drainage and hospital wastewater previously demonstrated a promising bioremediation viable approach for both toxic streams. The study of inhibition kinetics and microbial communities is essential to understand better the diverse species and the reaction mechanisms within the system. The kinetics and microbiology diversity in the sulfidogenic fluidized-bed reactor (at 30 °C) for co-treatment of hospital wastewater and metal-containing acidic water were examined. The alkalinity from organic oxidation raised the pH of the effluent from 2.3 to 6.1–8.2. Michaelis-Menten modeling yielded (Km =7.3 mg/l, Vmax = 0.12 mg/l min−1) in the batch bioreactor treatment using sulfate-reducing bacteria. For COD oxidation, the dissolved sulfide inhibition constant (Ki) was 3.6 mg/l, and the Ki value for H2S was 9 mg/l. The dominant species in the treatment process belong to the Proteobacteria group (especially Deltaproteobacteria). The ibuprofen and diclofenac compounds achieved the highest removal rates in the bioreactor of 58.6% and 52.3%, respectively; while, ketoprofen and naproxen of 41.9% and 46.6%, respectively. The findings in COD kinetics, sulfate-reducing bacteria abundance, and selected pharmaceutical concentration reduction provide insight into this co-treatment process's capability.
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Affiliation(s)
- Thobeka Pearl Makhathini
- School of Chemical and Metallurgical Engineering, University of the Witwatersrand, P/Bag 3, Wits 2050, Johannesburg, South Africa.,Department of Chemical Engineering, Mangosuthu University of Technology, 511 Mangosuthu Highway, Umlazi, Durban 4031, South Africa
| | - Jean Mulopo
- School of Chemical and Metallurgical Engineering, University of the Witwatersrand, P/Bag 3, Wits 2050, Johannesburg, South Africa
| | - Babatunde Femi Bakare
- Department of Chemical Engineering, Mangosuthu University of Technology, 511 Mangosuthu Highway, Umlazi, Durban 4031, South Africa
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Lin Y, Grembi JA, Goots SS, Sebastian A, Albert I, Brennan RA. Advantageous microbial community development and improved performance of pilot-scale field systems treating high-risk acid mine drainage with crab shell. JOURNAL OF HAZARDOUS MATERIALS 2021; 420:126665. [PMID: 34351284 DOI: 10.1016/j.jhazmat.2021.126665] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 06/25/2021] [Accepted: 07/14/2021] [Indexed: 06/13/2023]
Abstract
Microbial communities are crucial to the effectiveness and stability of bioremediation systems treating acid mine drainage (AMD); however, little research has addressed how they correlate to system performance under changing environmental conditions. In this study, 16S rRNA gene sequencing and quantitative PCR (qPCR) were used to characterize microbial communities within different substrate combinations of crab shell (CS) and spent mushroom compost (SMC) and their association with chemical performance in pilot-scale vertical flow ponds (VFPs) treating high risk AMD in central Pennsylvania over 643 days of operation. As compared to a control containing SMC, VFPs containing CS sustained higher alkalinity, higher sulfate-reducing rates, and more thorough metals removal (>90% for Fe and Al, >50% for Mn and Zn). Correspondingly, CS VFPs supported the growth of microorganisms in key functional groups at increasing abundance and diversity over time, especially more diverse sulfate-reducing bacteria. Through changing seasonal and operational conditions over almost two years, the relative abundance of the core phyla shifted in all reactors, but the smallest changes in functional gene copies were observed in VFPs containing CS. These results suggest that the high diversity and stability of microbial communities associated with CS are consistent with effective AMD treatment.
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Affiliation(s)
- Yishan Lin
- Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, PA, USA; State Key Laboratory of Pollution Control & Resource Reuse, School of the Environment, Nanjing University, Nanjing, China
| | - Jessica A Grembi
- Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, PA, USA; School of Medicine, Stanford University, Stanford, CA, USA
| | - Sara S Goots
- Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, PA, USA; Calfee, Halter & Griswold, Cleveland, OH, USA
| | - Aswathy Sebastian
- Bioinformatics, Huck Institute of the Life Sciences, The Pennsylvania State University, University Park, PA, USA
| | - István Albert
- Bioinformatics, Huck Institute of the Life Sciences, The Pennsylvania State University, University Park, PA, USA
| | - Rachel A Brennan
- Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, PA, USA.
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9
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Patel M, Jade RK, Dewangan PK, Dash AK, Kaushik AK. Removal of iron and sulphate during acid mine drainage treatment using laboratory successive alkalinity producing system and its behavioural relationship. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2021. [DOI: 10.1515/ijcre-2021-0120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Acid Mine Drainage (AMD) is one of the persistent water pollution problems in many coal mines of U.S.A. and Canada. Only few mines in India face this problem. The treatment of acid mine water has become a statutory requirement in almost all mines of the world. Metal removal and alkalinity generation is essential feature of any AMD treatment system but sulphate removal from acid mine drainage is still given the secondary importance. In the present study, four AMDs were treated in laboratory Successive Alkalinity Producing System (SAPS) for five different hydraulic retention times (HRT). The total iron removal and corresponding sulphate removal along with net alkalinity generation were studied during AMD treatment process by SAPS. A complete removal of total iron and sulphate removal of over 59% have been achieved. The study revealed that the total iron removal and sulphate removal increases with increase in HRT and its removal exhibited linear relationship. A substantial increase in alkalinity was also found after SAPS treatment. The findings of the study can be utilized in design of SAPS for removal of iron and sulphate during treatment of AMD in mining areas.
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Affiliation(s)
- Murlidhar Patel
- Department of Mining Engineering , National Institute of Technology , Raipur , India
| | - Ravi K. Jade
- Department of Mining Engineering , National Institute of Technology , Raipur , India
| | - Pankaj K. Dewangan
- Department of Mining Engineering , National Institute of Technology , Raipur , India
| | - Ashish K. Dash
- Department of Mining Engineering , National Institute of Technology , Raipur , India
| | - Anupam K. Kaushik
- Department of Mining Engineering , National Institute of Technology , Raipur , India
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10
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Munyai R, Ogola HJO, Modise DM. Microbial Community Diversity Dynamics in Acid Mine Drainage and Acid Mine Drainage-Polluted Soils: Implication on Mining Water Irrigation Agricultural Sustainability. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2021. [DOI: 10.3389/fsufs.2021.701870] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Environmental degradation related to mining-generated acid mine drainage (AMD) is a major global concern, contaminating surface and groundwater sources, including agricultural land. In the last two decades, many developing countries are expanding agricultural productivity in mine-impacted soils to meet food demand for their rapidly growing population. Further, the practice of AMD water (treated or untreated) irrigated agriculture is on the increase, particularly in water-stressed nations around the world. For sustainable agricultural production systems, optimal microbial diversity, and functioning is critical for soil health and plant productivity. Thus, this review presents up-to-date knowledge on the microbial structure and functional dynamics of AMD habitats and AMD-impacted agricultural soils. The long-term effects of AMD water such as soil acidification, heavy metals (HM), iron and sulfate pollution, greatly reduces microbial biomass, richness, and diversity, impairing soil health plant growth and productivity, and impacts food safety negatively. Despite these drawbacks, AMD-impacted habitats are unique ecological niches for novel acidophilic, HM, and sulfate-adapted microbial phylotypes that might be beneficial to optimal plant growth and productivity and bioremediation of polluted agricultural soils. This review has also highlighted the impact active and passive treatment technologies on AMD microbial diversity, further extending the discussion on the interrelated microbial diversity, and beneficial functions such as metal bioremediation, acidity neutralization, symbiotic rhizomicrobiome assembly, and plant growth promotion, sulfates/iron reduction, and biogeochemical N and C recycling under AMD-impacted environment. The significance of sulfur-reducing bacteria (SRB), iron-oxidizing bacteria (FeOB), and plant growth promoting rhizobacteria (PGPRs) as key players in many passive and active systems dedicated to bioremediation and microbe-assisted phytoremediation is also elucidated and discussed. Finally, new perspectives on the need for future studies, integrating meta-omics and process engineering on AMD-impacted microbiomes, key to designing and optimizing of robust active and passive bioremediation of AMD-water before application to agricultural production is proposed.
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11
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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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12
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Schwarz A, Pérez N. Long-term operation of a permeable reactive barrier with diffusive exchange. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 284:112086. [PMID: 33571852 DOI: 10.1016/j.jenvman.2021.112086] [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: 08/20/2019] [Revised: 01/23/2021] [Accepted: 01/28/2021] [Indexed: 06/12/2023]
Abstract
In this study, we evaluate the long term operation of a bench-scale reactor which simulates a permeable reactive barrier with sulfidic diffusive exchange (SDES PRB) to treat acid mine drainage (AMD), considering that treatment costs are very sensitive to the useful life for passive reactors. Its functioning was evaluated for a much longer period of 591 days compared to previous SDES PRB studies, with two influents simulating moderately and highly acid groundwater contaminated by AMD. First, we fed water amended with 200 mg/L Zn2+ and 3300 mg/L SO42- at pH 4.9; and after, water with 450 mg/L Fe2+, 100 mg/L Zn2+, 10 mg/L Ni2+, 5 mg/L Cu2+ and 3600 mg/L SO42- at pH 2.5. Biologically produced sulfide and alkalinity were enough to remove both metals and acidity (~99%) from the moderately acidic water, while with the highly acidic water, they resulted in significant removal of the metals reaching up to 87% and 79% of total Fe and Zn, respectively. Furthermore, no inhibitory effect was apparent, as the sulfate reduction rates in the two experiments did not vary significantly (averages close to 0.2 mol/m3-d), despite the much higher acidity and metal load in the second case. Hence, the SDES PRB protected the microbial consortium from metal toxicity and acidity in the long-term, and thus is suitable for remediation of AMD contaminated groundwater with high concentrations of metals, extending the operational range of conventional biological PRBs. Furthermore, an economic evaluation shows that SDES costs can be competitive with the costs of conventional chemical precipitation if the enhanced reactivity that SDES technology offers is realized.
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Affiliation(s)
- Alex Schwarz
- Departamento de Ingeniería Civil y Centro de Recursos Hídricos para La Agricultura y Minería (CRHIAM), Universidad de Concepción, Barrio Universitario, Concepción, Chile.
| | - Norma Pérez
- Departamento de Acuicultura, Universidad Católica del Norte, Larrondo, 1281, Coquimbo, Chile; Escuela de Prevención de Riesgos y Medio Ambiente, Universidad Católica del Norte, Larrondo, 1281, Coquimbo, Chile.
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13
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Mahamat Ahmat A, Mamindy-Pajany Y. Over-sulfated soils and sediments treatment: A brief discussion on performance disparities of biological and non-biological methods throughout the literature. WASTE MANAGEMENT & RESEARCH : THE JOURNAL OF THE INTERNATIONAL SOLID WASTES AND PUBLIC CLEANSING ASSOCIATION, ISWA 2021; 39:528-545. [PMID: 33461442 DOI: 10.1177/0734242x20982053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
High sulfate concentrations in industrial effluents as well as solid materials (excavated soils, dredged sediments, etc.) are a major hindrance for circular economy outlooks. SO42- acceptability standards are indeed increasingly restrictive, given the potential outcomes for public health and ecosystems. This literature review deals with the treatment pathways relying on precipitation, adsorption and microbial redox principles. Although satisfactory removal performances can be achieved with each of them, significant yield differences are displayed throughout the bibliography. The challenge here was to identify the parameters leading to this variability and to assess their impact. The precipitation pathway is based on the formation of two main minerals (ettringite and barite). It can lead to total sulfate removal but can also be limited by aqueous wastes chemistry. Stabilizer kinetics of formation and equilibrium are highly constrained by background properties such as pH, Eh, SO42- saturation state and inhibiting metal occurrences. Regarding the adsorption route, sorbents' intrinsic features such as the qmax parameter govern removal yields. Concerning the microbial pathway, the chemical oxygen demand/SO42- ratio and the hydraulic retention time, which are classically evoked as yield variation factors, appear here to be weakly influential. The effect of these parameters seems to be overridden by the influence of electron donors, which constitute a first order factor of variability. A second order variability can be read according to the nature of these electron donors. Approaches using simple monomers (ethanol lactates, etc.) perform better than those using predominantly ligneous organic matter.
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Affiliation(s)
- Adoum Mahamat Ahmat
- Laboratoire de Génie Civil et géo-Environnement (LGCgE), IMT-Lille-Douai, France
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14
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Chen J, Li X, Jia W, Shen S, Deng S, Ji B, Chang J. Promotion of bioremediation performance in constructed wetland microcosms for acid mine drainage treatment by using organic substrates and supplementing domestic wastewater and plant litter broth. JOURNAL OF HAZARDOUS MATERIALS 2021; 404:124125. [PMID: 33049629 DOI: 10.1016/j.jhazmat.2020.124125] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 09/20/2020] [Accepted: 09/26/2020] [Indexed: 06/11/2023]
Abstract
Gravel-based subsurface-flow constructed wetlands (CWs) amended with a walnut shell (WS) substrate were established to treat synthetic acid mine drainage (AMD) in this study, and artificial domestic wastewater (DW) and plant litter broth (PLB) were supplemented to enhance the performance. The CW media rapidly reached adsorption saturation with respect to metals (except Fe and Cr) without an external carbon source, while the addition of DW and PLB stimulated sulfate reduction activity and achieved efficient biogenic metal removal, primarily by the formation of hydroxide and sulfide precipitates and concomitant co-precipitation. The WS-amended CWs performed notably better than the control systems, not only in sequestering more metals and rapidly establishing favourable environments for biogenic metal abatement but also in supporting better growth of plants and functional microbes. The external organic carbon input greatly shaped the bacterial community compositions in the CWs, with substantial increases in the proportions of core functional populations involved in AMD biotreatment. Cooperation among Cellulomonas, Propioniciclava and sulfate-reducing bacteria (SRB), dominated by Desulfobulbus and Desulfatirhabdium, was the primary biogenic mechanism of AMD remediation in the CWs. Cellulosic waste-amended CWs with DW and PLB addition offer a promising eco-technology for AMD remediation.
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Affiliation(s)
- Jinquan Chen
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650091, China; Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming 650091, China
| | - Xuan Li
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650091, China; Institute of International Rivers and Eco-security, Yunnan University, Kunming 650091, China
| | - Wei Jia
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650091, China; China Machinery International Engineering Design and Research Institute Co., Ltd, Changsha 410007, China
| | - Shili Shen
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650091, China; Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming 650091, China
| | - Shengjiong Deng
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650091, China; Institute of International Rivers and Eco-security, Yunnan University, Kunming 650091, China
| | - Bohua Ji
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650091, China; Institute of International Rivers and Eco-security, Yunnan University, Kunming 650091, China
| | - Junjun Chang
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650091, China; Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming 650091, China.
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Chen H, Xiao T, Ning Z, Li Q, Xiao E, Liu Y, Xiao Q, Lan X, Ma L, Lu F. In-situ remediation of acid mine drainage from abandoned coal mine by filed pilot-scale passive treatment system: Performance and response of microbial communities to low pH and elevated Fe. BIORESOURCE TECHNOLOGY 2020; 317:123985. [PMID: 32805482 DOI: 10.1016/j.biortech.2020.123985] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 08/04/2020] [Accepted: 08/06/2020] [Indexed: 06/11/2023]
Abstract
A field pilot-scale passive treatment system was developed for in-situ bioremediation of acid mine drainage (AMD). The microbial community and its variation were analyzed. The data proved that 93.7% of total soluble Fe and 99% of soluble Fe(II) could be removed by the system. Principal coordinates analysis (PCoA) showed that a low pH and an elevated Fe concentration within the system created a unique microbial community that was dominated by acidophilic iron-oxidizing bacteria and iron-reducing bacteria. Canonical correlation analysis (CCA) indicated that the pH, iron content and total sulfur jointly determined the composition of the microbial communities. Species of Ferrovum, Delftia, Acinetobacter, Metallibacterium, Acidibacter and Acidiphilium were highly enriched, which promoted the removal of iron. Furthermore, the results revealed important data for the biogeochemical coupling of microbial communities and environmental parameters. These findings are beneficial for further application of in-situ field bioreactors to remediate AMD.
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Affiliation(s)
- Haiyan Chen
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tangfu Xiao
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China.
| | - Zengping Ning
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Qian Li
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Enzong Xiao
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Yizhang Liu
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Qingxiang Xiao
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; School of Tourism Management, Guizhou University of Commerce, Guiyang 550014, China
| | - Xiaolong Lan
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; School of Chemistry and Environmental Engineering, Hanshan Normal University, Chaozhou 521041, China
| | - Liang Ma
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fanghai Lu
- School of Materials and Metallurgical Engineering, Guizhou Institute of Technology, Guiyang 550003, China
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16
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Rodrigues C, Núñez-Gómez D, Follmann HVDM, Silveira DD, Nagel-Hassemer ME, Lapolli FR, Lobo-Recio MÁ. Biostimulation of sulfate-reducing bacteria and metallic ions removal from coal mine-impacted water (MIW) using shrimp shell as treatment agent. JOURNAL OF HAZARDOUS MATERIALS 2020; 398:122893. [PMID: 33027875 DOI: 10.1016/j.jhazmat.2020.122893] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 05/01/2020] [Accepted: 05/01/2020] [Indexed: 06/11/2023]
Abstract
This paper comprises several assays aiming to identify the basis for the bioremediation of mine-impacted water (MIW). To do so, the conditions for build anoxic microcosms for treating this effluent were varied, containing MIW, and a source of chitin, to biostimulate sulfate-reducing bacteria (SRB). The chitin sources were: commercial chitin (CHIT) and shrimp shell (SS), which in addition to chitin, contains CaCO3, and proteins in its composition. The CHIT assays were not successful in sulfate-reduction, even when the pH was increased with CaCO3. However, in all SS assays the SRB development was successful (85% sulfate removal for assay 3), including the metal-free (MF-SS) assay (75% for assay 5). High-throughput sequencing analysis revealed the structure of bacterial community in the SS assay: the most abundant genera were Clostridium and Klebsiella, both fermentative and chitinase producers; a few SRB from the genera Desulfovibrio and Desulfosporosinus were also detected. In the MF-SS assay, Desulfovibrio genuswas detected but Comamonas was dominant. It could be deduced that SS is a suitable substrate for SRB development, but CHIT is not. The sulfate-reduction process was provided by the cooperation between fermentative/chitinase-producer bacteria together with SRB, which leads to efficient MIW treatment, removing sulfate and metallic ions.
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Affiliation(s)
- Caroline Rodrigues
- Department of Environmental Engineering, Federal University of Santa Catarina (UFSC), 88040-900, Florianópolis, SC, Brazil.
| | - Dámaris Núñez-Gómez
- Department of Environmental Engineering, Federal University of Santa Catarina (UFSC), 88040-900, Florianópolis, SC, Brazil.
| | - Hioná V Dal Magro Follmann
- Department of Environmental Engineering, Federal University of Santa Catarina (UFSC), 88040-900, Florianópolis, SC, Brazil.
| | - Daniele D Silveira
- Department of Environmental Engineering, Federal University of Santa Catarina (UFSC), 88040-900, Florianópolis, SC, Brazil.
| | - Maria Eliza Nagel-Hassemer
- Department of Environmental Engineering, Federal University of Santa Catarina (UFSC), 88040-900, Florianópolis, SC, Brazil.
| | - Flávio R Lapolli
- Department of Environmental Engineering, Federal University of Santa Catarina (UFSC), 88040-900, Florianópolis, SC, Brazil.
| | - María Ángeles Lobo-Recio
- Department of Environmental Engineering, Federal University of Santa Catarina (UFSC), 88040-900, Florianópolis, SC, Brazil; Department of Energy and Sustainability, UFSC, 88906-072, Araranguá, SC, Brazil.
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17
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Sun R, Zhang L, Wang X, Ou C, Lin N, Xu S, Qiu YY, Jiang F. Elemental sulfur-driven sulfidogenic process under highly acidic conditions for sulfate-rich acid mine drainage treatment: Performance and microbial community analysis. WATER RESEARCH 2020; 185:116230. [PMID: 32784032 DOI: 10.1016/j.watres.2020.116230] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 06/16/2020] [Accepted: 07/23/2020] [Indexed: 06/11/2023]
Abstract
Elemental sulfur-driven sulfidogenic process has been demonstrated to be more economical and energy-efficient than sulfate-driven sulfidogenic process when treating metal-laden wastewater. In previous studies, we observed that the polysulfide-involved indirect sulfur reduction ensured the superiority of sulfur over sulfate as the electron acceptor in the sulfidogenic process under neutral or weak-alkaline conditions. However, realizing high-rate sulfur reduction process for acid mine drainage (AMD) treatment without pH amelioration is still a great challenge because polysulfide cannot exist under acidic conditions. In this study, a laboratory-scale sulfur-packed bed reactor was therefore continuously operated with a constant sulfate concentration (~1300 mg S/L) and decreasing pH from 7.3 to 2.1. After 400 days of operation, a stable sulfide production rate (38.2 ± 7.6 mg S/L) was achieved under highly acidic conditions (pH 2.6-3.5), which is significantly higher than those reported in sulfate reduction under similar conditions. In the presence of high sulfate content, elemental sulfur reduction could dominate over sulfate reduction under neutral and acidic conditions, especially when the pH ≥ 6.5 or ≤ 3.5. The decreasing pH significantly reduced the diversity of microbial community, but did not substantially influence the abundance of functional genes associated with organic and sulfur metabolisms. The predominant sulfur-reducing genera shifted from Desulfomicrobium under neutral conditions to Desulfurella under highly acidic conditions. The high-rate sulfur reduction under acidic conditions could be attributed to the combined results of high abundance of Desulfurella and low abundance of sulfate-reducing bacteria (SRB). Accordingly, sulfur reduction process can be developed to achieve efficient and economical treatment of AMD under highly acidic conditions (pH ≤ 3.5).
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Affiliation(s)
- Rongrong Sun
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, China; School of Environment, South China Normal University, Guangzhou, China; School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong, China
| | - Liang Zhang
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 637141, Singapore
| | - Xiaoyi Wang
- School of Environment, South China Normal University, Guangzhou, China
| | - Chunxi Ou
- School of Environment, South China Normal University, Guangzhou, China
| | - Nini Lin
- School of Environment, South China Normal University, Guangzhou, China
| | - Shuqun Xu
- School of Environment, South China Normal University, Guangzhou, China
| | - Yan-Ying Qiu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, China
| | - Feng Jiang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, China; Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, China.
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18
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Marais T, Huddy R, Harrison S, van Hille R. Effect of hydraulic residence time on biological sulphate reduction and elemental sulphur recovery in a single-stage hybrid linear flow channel reactor. Biochem Eng J 2020. [DOI: 10.1016/j.bej.2020.107717] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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19
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Gupta A, Sar P. Role of cost-effective organic carbon substrates in bioremediation of acid mine drainage-impacted soil of Malanjkhand Copper Project, India: a biostimulant for autochthonous microbial populations. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:27407-27421. [PMID: 31522400 DOI: 10.1007/s11356-019-06293-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Accepted: 08/26/2019] [Indexed: 06/10/2023]
Abstract
Development of an efficient bioremediation strategy for the mitigation of low pH (3.21), high dissolved SO42- (6285 mg/L), and Fe (7292 mg/kg)-rich acid mine drainage-impacted soil (AIS) was investigated through amendment of readily available organic carbon substrates (rice husk, compost, leaf litter, and grass clippings). An organic carbon mixture (OCM) formulated by mixing the test substrates was used to biostimulate microbial processes (SO42-/Fe3+reduction) necessary for efficient attenuation of the hazards imposed by AIS. OCM amendment in calcium carbonate-treated AIS enhanced reductive processes and removed dissolved SO42- and Fe3+ considerably raising the pH close to neutrality. 16S rRNA gene amplicon sequencing performed with total DNA and RNA elucidated the microbial population dynamics of treated AIS. Metabolically active populations comprised of fermentative (Clostridium sensu stricto 1 and Fonticella), iron-reducing (Acidocella, Anaeromyxobacter, and Clostridium sensu stricto 1), and sulfate-reducing (Desulfovibrio, Desulfotomaculum, Desulfosporosinus, and Desulfobacteraceae) bacteria. Microbial guilds obtained highlighted the synergistic role of cellulolytic, fermentative, and SO42-/Fe3+-reducing bacteria in attenuation of hazardous contaminants. Quantitative PCR analysis well supported the role of OCM in stimulating the indigenous bacterial populations, including those harboring the dissimilatory sulfite reductase (dsrB) gene and involved actively in SO42- reduction. The study demonstrated the suitability of locally available organic substrates as a low-cost and efficient biostimulation agent for in situ bioremediation of acid mine drainage (AMD)-impacted soil system.
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Affiliation(s)
- Abhishek Gupta
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Pinaki Sar
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India.
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20
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Pang Y, Gu T, Zhang G, Yu Z, Zhou Y, Zhu DZ, Zhang Y, Zhang T. Experimental study on volatile sulfur compound inhibition using a single-chamber membrane-free microbial electrolysis cell. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:30571-30582. [PMID: 32468370 DOI: 10.1007/s11356-020-09325-8] [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: 03/12/2020] [Accepted: 05/14/2020] [Indexed: 06/11/2023]
Abstract
Odor emissions from sewer systems and wastewater treatment plants have attracted much attention due to the potential negative effects on human health. A single-chamber membrane-free microbial electrolysis cell was proposed for the removal of sulfides in a sewer system. The feasibility of the use of volatile sulfur compounds and their removal efficiency in liquid and headspace gas phases were investigated using synthetic wastewater with real sewer sediment and Ru/Ir-coated titanium electrodes. The results indicate that hydrogen sulfide and volatile organic sulfur compounds were effectively inhibited in the liquid phase upon electrochemical treatment at current densities of 1.55, 2.06, and 2.58 mA/cm2, and their removal rates reached up to 86.2-100%, except for dimethyl trisulfide, the amount of which increased greatly at 1.55 mA/cm2. In addition, the amount of volatile sulfur compounds in the headspace decreased greatly; however, the total theoretical odor concentration was still high, and methanethiol and ethanethiol greatly contributed to the total strength of the odor concentration due to their low odor threshold concentrations. The major pathway for sulfide removal in the single-chamber membrane-free microbial electrolysis cell is biotic oxidation, the removal rate of which was 0.4-0.5 mg/min, 4-5 times that of indirect electrochemical oxidation.
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Affiliation(s)
- Yao Pang
- The Institute of Municipal Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Tianfeng Gu
- The Institute of Municipal Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Guijiao Zhang
- The Institute of Municipal Engineering, Zhejiang University, Hangzhou, 310058, China
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB, T6G 2W2, Canada
| | - Zhiguang Yu
- The Institute of Municipal Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Yongchao Zhou
- The Institute of Municipal Engineering, Zhejiang University, Hangzhou, 310058, China.
| | - David Z Zhu
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB, T6G 2W2, Canada
| | - Yiping Zhang
- The Institute of Municipal Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Tuqiao Zhang
- The Institute of Municipal Engineering, Zhejiang University, Hangzhou, 310058, China
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21
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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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22
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Evaluation of Dispersed Alkaline Substrate and Diffusive Exchange System Technologies for the Passive Treatment of Copper Mining Acid Drainage. WATER 2020. [DOI: 10.3390/w12030854] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The study evaluates the performance of the novel ADES (alkaline diffusive exchange System), SDES (sulfidogenic diffusive exchange system) and DAS (Dispersed Alkaline Substrate) technologies for the passive treatment of high-strength acid mine drainage (AMD) from copper mining (pH~3, 633 mg Cu L−1). The chemical DAS and ADES prototypes showed the best performance in the removal of Cu, Al, and Zn (98–100%), while the biochemical SDES reactors achieved a high sulfate removal rate (average of 0.28 mol m−3 day-1). Notably, the DES technology was effective in protecting the sulfate-reducing communities from the high toxicity of the AMD, and also in maintaining bed permeability, an aspect that was key in the ADES reactor. The DAS reactor showed the highest reactivity, accumulating the metallic precipitates in a lower reactor volume, allowing to conclude that it requires the lowest hydraulic residence time among all the reactors. However, the concentration of precipitates resulted in the formation of a hardpan, which may trigger the need of removing it to avoid compromising the continuity of the treatment process. This study suggests the development of new treatment alternatives by combining the strengths of each technology in combined or serial treatments.
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Ben Ali HE, Neculita CM, Molson JW, Maqsoud A, Zagury GJ. Salinity and low temperature effects on the performance of column biochemical reactors for the treatment of acidic and neutral mine drainage. CHEMOSPHERE 2020; 243:125303. [PMID: 31760288 DOI: 10.1016/j.chemosphere.2019.125303] [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: 01/31/2019] [Revised: 08/13/2019] [Accepted: 11/03/2019] [Indexed: 06/10/2023]
Abstract
Passive biochemical reactors (PBRs) represent a promising option for the treatment of mine drainage. In this study, the influence of temperature (22 and 5 °C), salinity (0 and 20 g/L) and hydraulic retention time (HRT) on the efficiency of PBRs for the treatment of acidic and neutral mine drainage (AMD and NMD) was evaluated. To do so, eight 11 L PBRs were set-up and operated with vertically upward flow. Synthetic AMD and NMD, with two salinities (0 and 20 g/L), were tested at ambient temperature (22 ± 0.5 °C) during the first 3 months, then at low temperature (5 ± 1 °C), for 5 additional months. The HRT tested was 0.5 and 1 day, for NMD, and 2.5 and 5 days, for AMD. Results showed a consistent efficiency, above 65%, with higher HRTs (1 vs. 0.5 day for NMD and 5 vs. 2.5 for AMD). At room temperature, metals and sulfate removal was better for non-saline synthetic effluents (>99% vs 95% for Cu, 99% vs >74% for Ni, 90% vs 75% for Fe, and <99% vs <96% for SO42-), after 3 months. At 5 °C, removal efficiency decreased especially for Ni, from 99% to 74%, for both mine drainage qualities. However, sulfate removal was found to be better in saline AMD (<40% vs <10%). The simultaneous effect of low temperature and high salinity further decreased PBR performance. Although higher HRTs entailed better removal efficiency, hydraulic problems such as decreases in permeability of the reactive mixture may still lead to inhibition of long-term PBR efficiency.
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Affiliation(s)
- Houssem E Ben Ali
- Research Institute on Mines and Environment (RIME), University of Québec in Abitibi-Témiscamingue (UQAT), 445 Boul. de l'Université, Rouyn-Noranda, QC, J9X 5E4, Canada
| | - Carmen M Neculita
- Research Institute on Mines and Environment (RIME), University of Québec in Abitibi-Témiscamingue (UQAT), 445 Boul. de l'Université, Rouyn-Noranda, QC, J9X 5E4, Canada.
| | - John W Molson
- Dept. of Geology & Geological Engineering, Université Laval, Québec City, QC, G1V 0A6, Canada
| | - Abdelkabir Maqsoud
- Research Institute on Mines and Environment (RIME), University of Québec in Abitibi-Témiscamingue (UQAT), 445 Boul. de l'Université, Rouyn-Noranda, QC, J9X 5E4, Canada
| | - Gérald J Zagury
- RIME, Department of Civil, Geological, and Mining Engineering, Polytechnique Montréal, C.P. 6079, Station Centre-ville, Montreal, QC, H3C 3A7, Canada
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Villegas-Plazas M, Sanabria J, Junca H. A composite taxonomical and functional framework of microbiomes under acid mine drainage bioremediation systems. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 251:109581. [PMID: 31563048 DOI: 10.1016/j.jenvman.2019.109581] [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: 05/03/2019] [Revised: 09/11/2019] [Accepted: 09/14/2019] [Indexed: 05/21/2023]
Abstract
Mining-industry is one of the most important activities in the economic development of many countries and produces highly significant alterations on the environment, mainly due to the release of a strong acidic metal-rich wastewater called acid mine drainage (AMD). Consequently, the establishment of multiple wastewater treatment strategies remains as a fundamental challenge in AMD research. Bioremediation, as a constantly-evolving multidisciplinary endeavor had been complemented during the last decades by novel tools of increasingly higher resolution such as those based on omics approaches, which are providing detailed insights into the ecology, evolution and mechanisms of microbial communities acting in bioremediation processes. This review specifically addresses, reanalyzes and reexamines in a composite comparative manner, the available sequence information and associated metadata available in public databases about AMD impacted microbial communities; summarizing our understanding of its composition and functions, and proposing potential genetic enhancements for improved bioremediation strategies. 16 S rRNA gene-targeted sequencing data from 9 studies previously published including AMD systems reported and studied around the world, were collected and reanalyzed to compare and identify the core and most abundant genera in four distinct AMD ecosystems: surface biofilm, water, impacted soils/sediments and bioreactor microbiomes. We determined that the microbial communities of bioreactors were the most diverse in bacterial types detected. The metabolic pathways predicted strongly suggest the key role of syntrophic communities with denitrification, methanogenesis, manganese, sulfate and iron reduction. The perspectives to explore the dynamics of engineering systems by high-throughput sequencing and biochemical techniques are discussed and foreseen application of synthetic biology and omics exploration on improved AMD biotransformation are proposed.
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Affiliation(s)
- Marcela Villegas-Plazas
- RG Microbial Ecology: Metabolism, Genomics & Evolution, Div. Ecogenomics & Holobionts, Microbiomas Foundation, LT11A, 250008, Chia, Colombia; Environmental Microbiology and Biotechnology Laboratory, Engineering School of Environmental & Natural Resources, Engineering Faculty, Universidad del Valle, Cali, Colombia.
| | - Janeth Sanabria
- Environmental Microbiology and Biotechnology Laboratory, Engineering School of Environmental & Natural Resources, Engineering Faculty, Universidad del Valle, Cali, Colombia
| | - Howard Junca
- RG Microbial Ecology: Metabolism, Genomics & Evolution, Div. Ecogenomics & Holobionts, Microbiomas Foundation, LT11A, 250008, Chia, Colombia
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Wei X, Zhang S, Shimko J, Dengler RW. Mine drainage: Treatment technologies and rare earth elements. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2019; 91:1061-1068. [PMID: 31291681 DOI: 10.1002/wer.1178] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 06/20/2019] [Accepted: 06/22/2019] [Indexed: 06/09/2023]
Abstract
The recent research and development on mine drainage published in 2018 was summarized in this annual review. In particular, this review was focused on two main aspects of mine drainage: (a) advances in treatment technologies and (b) rare earth elements in mine drainage and its recovery. The first section covers passive treatment technologies and active treatment options, including physiochemical treatment and biological treatment. The second section includes the characterization of rare earth elements in mine drainage and recovery technologies. Due to the importance of rare earth elements and the growing interest in their recovery from mine drainage, rare earth elements are reported as a separate section for the first time in this review. PRACTITIONER POINTS: Advances in treatment technologies for mine drainage are reviewed. Rare earth elements in mine drainage and its recovery are summarized. Reviewed technologies include passive, active, advanced and novel processes.
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Affiliation(s)
- Xinchao Wei
- Department of Physics and Engineering, Slippery Rock University, Slippery Rock, Pennsylvania
| | - Shicheng Zhang
- Department of Environmental Science and Technology, Fudan University, Shanghai, China
| | | | - Robert W Dengler
- Municipal Services Group, Gannett Fleming, Inc., Pittsburgh, Pennsylvania
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Torregrosa M, Schwarz A, Nancucheo I, Balladares E. Evaluation of the bio-protection mechanism in diffusive exchange permeable reactive barriers for the treatment of acid mine drainage. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 655:374-383. [PMID: 30471606 DOI: 10.1016/j.scitotenv.2018.11.083] [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: 09/10/2018] [Revised: 11/06/2018] [Accepted: 11/06/2018] [Indexed: 06/09/2023]
Abstract
This research studied the bio-protection mechanism based on chemical gradients in diffusive exchange permeable reactive barriers, evaluating the thickness of the reactive layers in the treatment of concentrated acid mine drainage (AMD). Six bench-scale reactors were constructed with reactive layer thicknesses of 2.5, 5, and 7.5 cm in duplicate. The reactors were first fed a sulfated solution for 55 days, followed by concentrated AMD for 166 days. The change of feed to AMD mainly affected the reactors with thinner 2.5 cm layers in comparison to the reactors with 5 and 7.5 cm layers. Cu and Zn removal efficiency was practically 100% in all the reactors; however, in the thinner layer reactors, metal breakthrough occurred towards the end of the experiment concurrently with inhibitory metal concentrations in the reactive layers. On the contrary, the reactors with layer thicknesses of 5 and 7.5 cm evaluated did not present toxic concentrations of these metals at any of the monitoring points. The bio-protection criterion qD correctly predicted that the thin-layer reactor would be the most affected by the toxicity of AMD. The criterion also indicated that all the reactors should fail. Nevertheless, the fault in the thinner layer reactor registered in the effluent after >150 days; therefore, the possibility of failure in the 5 and 7.5 cm thickness reactors is not rejected, as it could have occurred if the experiment had continued.
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Affiliation(s)
- Martin Torregrosa
- Departamento de Ingeniería Civil y Centro de Recursos Hídricos para el Agua y la Minería (CRHIAM), Universidad de Concepción, Barrio Universitario, Concepción, Chile.
| | - Alex Schwarz
- Departamento de Ingeniería Civil y Centro de Recursos Hídricos para el Agua y la Minería (CRHIAM), Universidad de Concepción, Barrio Universitario, Concepción, Chile.
| | - Ivan Nancucheo
- Facultad de Ingeniería y Tecnología, Universidad San Sebastián, Lientur 1457, Concepción, Chile.
| | - Eduardo Balladares
- Departamento de Ingeniería Metalúrgica, Universidad de Concepción, Barrio Universitario, Concepción, Chile.
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Pérez N, Schwarz AO, Barahona E, Sanhueza P, Diaz I, Urrutia H. Performance of two differently designed permeable reactive barriers with sulfate and zinc solutions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 642:894-903. [PMID: 29929141 DOI: 10.1016/j.scitotenv.2018.06.046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 06/04/2018] [Accepted: 06/04/2018] [Indexed: 06/08/2023]
Abstract
For the first time, this laboratory-scale study evaluates the feasibility of incorporating diffusive exchange in permeable reactive barriers. In order to do this, the performance of two permeable reactive barriers (PRB) with different internal substrate arrangements were compared during the administration of a sulfate solution without metals (for 163 days) and with metals (for 60 days), simulating groundwater contaminated with acid mine drainage (AMD). In order to simulate a traditional PRB, a homogeneous distribution was implemented in the first reactor and the other PRB reactor utilized diffusion-active technology (DAPRB). In the DAPRB, the distribution of the reactive material was interspersed with the conductive material. The measurements in the internal ports showed that transverse gradients of sulfide formed in the DAPRB, causing the diffusion of sulfide from the substrate toward the layer interface, which is where the sulfide reacts by forming complexes with the metal. The DAPRB prevents the microorganisms from direct contact with AMD. This protection caused greater activity (sulfide production).
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Affiliation(s)
- Norma Pérez
- Laboratorio de Ingeniería Hidraúlica y Ambiental, Facultad de Ingeniería, Universidad de Concepción, Chile; Departamento de Acuicultura, Facultad de Ciencias del Mar, Universidad Católica del Norte, Chile.
| | - Alex O Schwarz
- Laboratorio de Ingeniería Hidraúlica y Ambiental, Facultad de Ingeniería, Universidad de Concepción, Chile; Centro de Recursos Hídricos para la Agricultura y Minería (CRHIAM), Universidad de Concepción, Chile.
| | - Esteban Barahona
- Laboratorio de Ingeniería Hidraúlica y Ambiental, Facultad de Ingeniería, Universidad de Concepción, Chile.
| | - Pamela Sanhueza
- Laboratorio de Ingeniería Hidraúlica y Ambiental, Facultad de Ingeniería, Universidad de Concepción, Chile; Centro de Recursos Hídricos para la Agricultura y Minería (CRHIAM), Universidad de Concepción, Chile.
| | - Isabel Diaz
- Laboratorio de Ingeniería Hidraúlica y Ambiental, Facultad de Ingeniería, Universidad de Concepción, Chile
| | - Homero Urrutia
- Laboratorio of Biopelículas y Microbiología Ambiental, Centro de Biotecnología, Universidad de Concepción, Chile.
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Hydraulic retention time affects bacterial community structure in an As-rich acid mine drainage (AMD) biotreatment process. Appl Microbiol Biotechnol 2018; 102:9803-9813. [PMID: 30155752 DOI: 10.1007/s00253-018-9290-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 07/05/2018] [Accepted: 08/01/2018] [Indexed: 10/28/2022]
Abstract
Arsenic removal consecutive to biological iron oxidation and precipitation is an effective process for treating As-rich acid mine drainage (AMD). We studied the effect of hydraulic retention time (HRT)-from 74 to 456 min-in a bench-scale bioreactor exploiting such process. The treatment efficiency was monitored during 19 days, and the final mineralogy and bacterial communities of the biogenic precipitates were characterized by X-ray absorption spectroscopy and high-throughput 16S rRNA gene sequencing. The percentage of Fe(II) oxidation (10-47%) and As removal (19-37%) increased with increasing HRT. Arsenic was trapped in the biogenic precipitates as As(III)-bearing schwertmannite and amorphous ferric arsenate, with a decrease of As/Fe ratio with increasing HRT. The bacterial community in the biogenic precipitate was dominated by Fe-oxidizing bacteria whatever the HRT. The proportion of Gallionella and Ferrovum genera shifted from respectively 65 and 12% at low HRT to 23 and 51% at high HRT, in relation with physicochemical changes in the treated water. aioA genes and Thiomonas genus were detected at all HRT although As(III) oxidation was not evidenced. To our knowledge, this is the first evidence of the role of HRT as a driver of bacterial community structure in bioreactors exploiting microbial Fe(II) oxidation for AMD treatment.
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Xu R, Yang ZH, Zheng Y, Liu JB, Xiong WP, Zhang YR, Lu Y, Xue WJ, Fan CZ. Organic loading rate and hydraulic retention time shape distinct ecological networks of anaerobic digestion related microbiome. BIORESOURCE TECHNOLOGY 2018; 262:184-193. [PMID: 29705610 DOI: 10.1016/j.biortech.2018.04.083] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 04/19/2018] [Accepted: 04/20/2018] [Indexed: 05/27/2023]
Abstract
Understanding of how anaerobic digestion (AD)-related microbiomes are constructed by operational parameters or their interactions within the biochemical process is limited. Using high-throughput sequencing and molecular ecological network analysis, this study shows the succession of AD-related microbiome hosting diverse members of the phylum Actinobacteria, Bacteroidetes, Euryarchaeota, and Firmicutes, which were affected by organic loading rate (OLR) and hydraulic retention time (HRT). OLR formed finer microbial network modules than HRT (12 vs. 6), suggesting the further subdivision of functional components. Biomarkers were also identified in OLR or HRT groups (e.g. the family Actinomycetaceae, Methanosaetaceae and Aminiphilaceae). The most pair-wise link between Firmicutes and biogas production indicates the keystone members based on network features can be considered as markers in the regulation of AD. A set of 40% species ("core microbiome") were similar across different digesters. Such noteworthy overlap of microbiomes indicates they are generalists in maintaining the ecological stability of digesters.
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Affiliation(s)
- Rui Xu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Zhao-Hui Yang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Yue Zheng
- Department of Chemical Engineering, University of Washington, Seattle, WA 98195, United States
| | - Jian-Bo Liu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Wei-Ping Xiong
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Yan-Ru Zhang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Yue Lu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Wen-Jing Xue
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Chang-Zheng Fan
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
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