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Shahi PB, Manandhar S, Angove MJ, Paudel SR. Performance evaluation of species varied fixed bed biofilm reactor for wastewater treatment of Dhobi Khola outfall, Setopul, Kathmandu, Nepal. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 942:173752. [PMID: 38851334 DOI: 10.1016/j.scitotenv.2024.173752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 05/09/2024] [Accepted: 06/02/2024] [Indexed: 06/10/2024]
Abstract
The sustainability of wastewater treatment plants poses significant challenges for developing countries, necessitating substantial investment for operation and maintenance. Biofilm reactors seeded with specific species of microorganisms were investigated under controlled environmental conditions. However, the performance evaluation of such reactors under natural conditions remains largely underexplored. This study investigated wastewater treatment capabilities of bench-scale fixed bed biofilm reactors, employing various species (Wastewater Microbes, Pseudomonas, Algae, and a co-culture of Algae and Pseudomonas). The reactors (Treatments and Control) were filled with 28 mm nominal-size local aggregates as packing media, operated under different contact times, and subjected to varying concentrations of heavy metals (Zn, Cd). To assess the reactor performances, the Bland-Altman Plot and Chemical Oxygen Demand (COD) removal kinetics were evaluated. The results revealed that the reactor initiated with a co-culture exhibited the optimal COD removal efficiency, reaching 84 ± 1 %. The reactor initially seeded with wastewater microbes exhibited the highest heavy metal elimination, achieving 94 ± 1 % and 88 ± 1 % removal for Zn and Cd respectively. The wastewater-seeded reactor demonstrated the zero-order COD removal kinetic coefficient (k) of 46.41 mg/L/h at an average influent COD concentration of 558 mg/L at 10 h contact time. While Pseudomonas-seeded reactor demonstrated k = 0.73 mg/L/h at 20 h contact time with 69 mg/L influent COD and heavy metal concentrations Zn = 26 mg/L and Cd = 3.57 mg/L. The findings of this study suggest that variations in environmental conditions, contact time, and heavy metal concentration have minimal impact on the pollutant removal efficacy of the reactors, and provide robust evidence for their viability as a sustainable alternative in municipal wastewater treatment. The study also identifies the possibility of treating specific wastewater characteristics by altering the dominant species in the reactors, paving the way for further research on the efficacy of other microbial genomes in fixed bed biofilm reactors.
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Affiliation(s)
- Pratap Bikram Shahi
- Department of Civil Engineering, Pulchowk Campus, Institute of Engineering, Tribhuvan University, Nepal; Aastha Scientific Research Service Pvt. Ltd., Maitidevi, Kathmandu, Nepal
| | - Sarita Manandhar
- Department of Microbiology, Tri-Chandra Multiple Campus, Tribhuvan University, Nepal
| | - Michael J Angove
- Department of Rural Clinical Sciences, La Trobe Rural Health School, La Trobe University, Australia
| | - Shukra Raj Paudel
- Department of Civil Engineering, Pulchowk Campus, Institute of Engineering, Tribhuvan University, Nepal; Department of Environmental Engineering, College of Science and Technology, Korea University, Sejong, Republic of Korea.
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Fate of Biofilm Activity in Cascade Aerating Trickling Filter for Wastewater Treatment: Comparison of Two Types of Indigenous Support Media. Biochem Eng J 2023. [DOI: 10.1016/j.bej.2023.108875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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Manirakiza B, Sirotkin AC. Bioaugmentation of nitrifying bacteria in up-flow biological aerated filter's microbial community for wastewater treatment and analysis of its microbial community. SCIENTIFIC AFRICAN 2021. [DOI: 10.1016/j.sciaf.2021.e00981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Tsuchiya Y, Nakagawa T, Takahashi R. Quantification and Phylogenetic Analysis of Ammonia Oxidizers on Biofilm Carriers in a Full-Scale Wastewater Treatment Plant. Microbes Environ 2020; 35. [PMID: 32249239 PMCID: PMC7308565 DOI: 10.1264/jsme2.me19140] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Biofilm carriers have been used to remove ammonia in several wastewater treatment plants (WWTPs) in Japan. However, the abundance and species of ammonia oxidizers in the biofilms formed on the surface of carriers in full-scale operational WWTP tanks remain unclear. In the present study, we conducted quantitative PCR and PCR cloning of the amoA genes of ammonia-oxidizing bacteria and archaea (AOB and AOA) and a complete ammonia oxidizer (comammox) in the biofilm formed on the carriers in a full-scale WWTP. The quantification of amoA genes showed that the abundance of AOB and comammox was markedly greater in the biofilm than in the activated sludge suspended in a tank solution of the WWTP, while AOA was not detected in the biofilm or the activated sludge. A phylogenetic analysis of amoA genes revealed that as-yet-uncultivated comammox Nitrospira and uncultured AOB Nitrosomonas were predominant in the biofilm. The present results suggest that the biofilm formed on the surface of carriers enable comammox Nitrospira and AOB Nitrosomonas to co-exist and remain in the full-scale WWTP tank surveyed in this study.
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Liu L, Ji M, Wang F, Yan Z, Tian Z. Response of nitrogen removal performance, functional genes abundances and N-acyl-homoserine lactones release to carminic acid of anammox biomass. BIORESOURCE TECHNOLOGY 2020; 299:122567. [PMID: 31869627 DOI: 10.1016/j.biortech.2019.122567] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 12/02/2019] [Accepted: 12/04/2019] [Indexed: 06/10/2023]
Abstract
Carminic acid (CA) can serve as a redox mediator and influence the electron transfer process. CA dosages of 0-5 mg/L were added to anaerobic ammonia oxidation (anammox) biomass. The results illustrated that CA not only reduced the inorganic nitrogen removal efficiency, but also decreased the nitrogen removal rate. The deterioration of nitrogen removal performance was due to the excess production of nitrate-nitrogen. The concentration of extracellular polymeric substances showed a decrease together with a decline in N-acyl-homoserine lactones release. CA addition decreased the activity of anammox bacteria while increasing the nitrifying potential. Quantitative reverse transcription polymerase chain reaction showed a decrease in anammox functional genes (nirS, hzo, and hzsB) and promotion of the expression of the nxrB gene, which corresponded with a decrease in anammox bacteria activity and the improvement of nitrifying potential. As a result, CA should not be added to anammox biomass.
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Affiliation(s)
- Lingjie Liu
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Min Ji
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Fen Wang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China.
| | - Zhao Yan
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Zhongke Tian
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
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Freeman D, Bajón Fernández Y, Wilson A, McKew BA, Whitby C, Clark DR, Jefferson B, Coulon F, Hassard F. Nitrogen oxidation consortia dynamics influence the performance of full-scale rotating biological contactors. ENVIRONMENT INTERNATIONAL 2020; 135:105354. [PMID: 31864025 DOI: 10.1016/j.envint.2019.105354] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 11/13/2019] [Accepted: 11/20/2019] [Indexed: 06/10/2023]
Abstract
Ammonia oxidising microorganisms (AOM) play an important role in ammonia removal in wastewater treatment works (WWTW) including rotating biological contactors (RBCs). Environmental factors within RBCs are known to impact the performance of key AOM, such that only some operational RBCs have shown ability for elevated ammonia removal. In this work, long-term treatment performance of seven full-scale RBC systems along with the structure and abundance of the ammonia oxidising bacteria (AOB) and archaea (AOA) communities within microbial biofilms were examined. Long term data showed the dominance of AOB in most RBCs, although two RBCs had demonstrable shift toward an AOA dominated AOM community. Next Generation Sequencing of the 16S rRNA gene revealed diverse evolutionary ancestry of AOB from RBC biofilms while nitrite-oxidising bacteria (NOBs) were similar to reference databases. AOA were more abundant in the biofilms subject to lower organic loading and higher oxygen concentration found at the distal end of RBC systems. Modelling revealed a distinct nitrogen cycling community present within high performing RBCs, linked to efficient control of RBC process variables (retention time, organic loading and oxygen concentration). We present a novel template for enhancing the resilience of RBC systems through microbial community analysis which can guide future strategies for more effective ammonia removal. To best of the author's knowledge, this is the first comparative study reporting the use of next generation sequencing data on microbial biofilms from RBCs to inform effluent quality of small WWTW.
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Affiliation(s)
- D Freeman
- Cranfield University, College Road, Cranfield, Bedfordshire MK43 0AL, UK; Severn Trent, 2 St Johns Street, Coventry CV1 2LZ, UK
| | - Y Bajón Fernández
- Cranfield University, College Road, Cranfield, Bedfordshire MK43 0AL, UK; Severn Trent, 2 St Johns Street, Coventry CV1 2LZ, UK
| | - A Wilson
- Severn Trent, 2 St Johns Street, Coventry CV1 2LZ, UK; Atkins Global, The Axis, 10 Holliday St, Birmingham B1 1TF, UK
| | - B A McKew
- School of Biological Sciences, University of Essex, Colchester CO4 3SQ, UK
| | - C Whitby
- School of Biological Sciences, University of Essex, Colchester CO4 3SQ, UK
| | - D R Clark
- School of Biological Sciences, University of Essex, Colchester CO4 3SQ, UK
| | - B Jefferson
- Cranfield University, College Road, Cranfield, Bedfordshire MK43 0AL, UK
| | - F Coulon
- Cranfield University, College Road, Cranfield, Bedfordshire MK43 0AL, UK
| | - F Hassard
- Cranfield University, College Road, Cranfield, Bedfordshire MK43 0AL, UK.
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Chen Y, Lan S, Wang L, Dong S, Zhou H, Tan Z, Li X. A review: Driving factors and regulation strategies of microbial community structure and dynamics in wastewater treatment systems. CHEMOSPHERE 2017; 174:173-182. [PMID: 28161518 DOI: 10.1016/j.chemosphere.2017.01.129] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 01/24/2017] [Accepted: 01/25/2017] [Indexed: 06/06/2023]
Abstract
The performance and stabilization of biological wastewater treatment systems 1are closely related to the microbial community structure and dynamics. In this paper, the effects and mechanisms of influent composition, process configuration, operating parameters (dissolved oxygen [DO], pH, hydraulic retention time [HRT] and sludge retention time [SRT]) and environmental condition (temperature) to the change of microbial community structure and process performance (nitrification, denitrification, biological phosphorus removal, organics mineralization and utilization, etc.) are critically reviewed. Furthermore, some strategies for microbial community structure regulation, mainly bioaugmentation, process adjustment and operating parameters optimization, applied in the current wastewater treatment systems are also discussed. Although the recent studies have strengthened our understanding on the relationship between microbial community structure and wastewater treatment process performance, how to fully tap the microbial information, optimize the microbial community structure and maintain the process performance in wastewater treatment systems are still full of challenges.
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Affiliation(s)
- Yangwu Chen
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China; University of Chinese Academy of Sciences, 100049, Beijing, PR China
| | - Shuhuan Lan
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China
| | - Longhui Wang
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China
| | - Shiyang Dong
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China; University of Chinese Academy of Sciences, 100049, Beijing, PR China
| | - Houzhen Zhou
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China
| | - Zhouliang Tan
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China.
| | - Xudong Li
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China
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8
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Mai L, van den Akker B, Du J, Kookana RS, Fallowfield H. Impact of exogenous organic carbon on the removal of chemicals of concern in the high rate nitrifying trickling filters. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2016; 174:7-13. [PMID: 26989940 DOI: 10.1016/j.jenvman.2016.02.050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 02/26/2016] [Accepted: 02/29/2016] [Indexed: 06/05/2023]
Abstract
The application of fixed bed high rate nitrifying trickling filters (NTFs) for the removal of track organic chemicals of concern (CoC) is less well known than their application to nutrient removal in water treatment. Particularly, the effect of exogenous organic carbon substrate (sucrose) loading on the performance of NTFs is not well understood. A laboratory-scale NTF system was operated in recirculation mode, with the objective of removing ammonia and CoC simultaneously. The efficiency of a high rate NTF for removal both of low concentration of ammonia (5 mg NH4-N L(-1)) and different concentrations of CoC in the presence of an exogenous organic carbon substrate (30 mg total organic carbon (TOC) L(-1)) was investigated. In the presence of exogenous organic carbon, the results demonstrated that the high rate NTF was able to successfully remove most of the CoCs investigated, with the removal ranging from 20.2% to 87.54%. High removal efficiencies were observed for acetaminophen (87.54%), bisphenol A (86.60%), trimethoprim (86.24%) and 17α-ethynylestradiol (80.60%). It was followed by the medium removal efficiency for N, N-diethyl-m-toluamide (61.31%) and atrazine (56.90%). In contrast, the removal of caffeine (28.43%) and benzotriazole (20.20%) was poorer in the presence of exogenous organic carbon. The removal efficiency for CoC was also compared with the results obtained in our previous study in the absence of exogenous organic carbon. The results showed that the addition of exogenous organic carbon was able to improve the removal of some of the CoC. Significant TOC percentage removals (45.68%-84.43%) and ammonia removal rate (mean value of 0.44 mg NH4-N L(-1) h(-1)) were also achieved in this study. The findings from this study provide valuable information for optimising the efficiency of high rate NTF for the removal of ammonia, CoC and TOC.
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Affiliation(s)
- Lei Mai
- Department of Environmental Health, School of Environment, Flinders University, Adelaide, South Australia, 5042, Australia
| | - Ben van den Akker
- Department of Environmental Health, School of Environment, Flinders University, Adelaide, South Australia, 5042, Australia; Australian Water Quality Centre, Adelaide, South Australia, 5000, Australia
| | - Jun Du
- Commonwealth Scientific and Industrial Research Organisation (CSIRO) Land and Water, Waite Campus, Glen Osmond, South Australia, 5064, Australia
| | - Rai S Kookana
- Commonwealth Scientific and Industrial Research Organisation (CSIRO) Land and Water, Waite Campus, Glen Osmond, South Australia, 5064, Australia; University of Adelaide, Waite Campus, Glen Osmond, South Australia, 5064, Australia
| | - Howard Fallowfield
- Department of Environmental Health, School of Environment, Flinders University, Adelaide, South Australia, 5042, Australia.
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9
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Abzazou T, Araujo RM, Auset M, Salvadó H. Tracking and quantification of nitrifying bacteria in biofilm and mixed liquor of a partial nitrification MBBR pilot plant using fluorescence in situ hybridization. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 541:1115-1123. [PMID: 26473713 DOI: 10.1016/j.scitotenv.2015.10.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 10/01/2015] [Accepted: 10/02/2015] [Indexed: 06/05/2023]
Abstract
A moving bead biofilm reactor (MBBR) pilot plant was implemented as a partial nitrification process for pre-treatment of ammonium-rich liquors (676 ± 195 mg L(-1)), and studied for 479 days under variations in hydraulic retention time. The main purpose of this work, was the study of dynamics abundance of total bacteria and single-cells nitrifying bacteria belonging to ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) in biofilms and mixed liquor of the plant. The microbial monitoring was successfully achieved using fluorescence in situ hybridization combined with flocs disaggregation protocol as a useful microbial monitoring tool. A partial nitrification process with a N-NH4(+) removal rate of about 38.6 ± 14.8% was successfully achieved at 211 days after start-up, with a clear dominance of AOB, which accounted for 11.3 ± 17.0% of total bacterial cells compared with only 2.1 ± 4.0% of NOB. The effluent obtained was subsequently supplied to an Anammox reactor for complete ammonium treatment.
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Affiliation(s)
- Tarik Abzazou
- Department of Microbiology, Faculty of Biology, University of Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain.
| | - Rosa M Araujo
- Department of Microbiology, Faculty of Biology, University of Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain.
| | - María Auset
- ACCIONA AGUA, S.A., Av de les Garrigues 22, El Prat de Llobregat, 08820 Barcelona, Spain.
| | - Humbert Salvadó
- Department of Animal Biology, Faculty of Biology, University of Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain.
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Cabrol L, Poly F, Malhautier L, Pommier T, Lerondelle C, Verstraete W, Lepeuple AS, Fanlo JL, Le Roux X. Management of Microbial Communities through Transient Disturbances Enhances the Functional Resilience of Nitrifying Gas-Biofilters to Future Disturbances. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:338-48. [PMID: 26651080 DOI: 10.1021/acs.est.5b02740] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Microbial communities have a key role for the performance of engineered ecosystems such as waste gas biofilters. Maintaining constant performance despite fluctuating environmental conditions is of prime interest, but it is highly challenging because the mechanisms that drive the response of microbial communities to disturbances still have to be disentangled. Here we demonstrate that the bioprocess performance and stability can be improved and reinforced in the face of disturbances, through a rationally predefined strategy of microbial resource management (MRM). This strategy was experimentally validated in replicated pilot-scale nitrifying gas-biofilters, for the two steps of nitrification. The associated biological mechanisms were unraveled through analysis of functions, abundances and community compositions for the major actors of nitrification in these biofilters, that is, ammonia-oxidizing bacteria (AOB) and Nitrobacter-like nitrite-oxidizers (NOB). Our MRM strategy, based on the application of successive, transient perturbations of increasing intensity, enabled to steer the nitrifier community in a favorable way through the selection of more resistant AOB and NOB sharing functional gene sequences close to those of, respectively, Nitrosomonas eutropha and Nitrobacter hamburgensis that are well adapted to high N load. The induced community shifts resulted in significant enhancement of nitrification resilience capacity following the intense perturbation.
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Affiliation(s)
- Léa Cabrol
- Laboratoire Génie de l'Environnement Industriel, Ecole des Mines d'Alès , Rue Jules Renard, 30100 Alès, France
- Veolia Environnement Recherche et Innovation, Chemin de la Digue, BP76, 78600, Maisons Laffitte, France
- Pontificia Universidad Católica de Valparaíso, Escuela de Ingeniería Bioquímica, Avenida Brasil 2185, Valparaíso, Chile
| | - Franck Poly
- Laboratoire d'Ecologie Microbienne, Université de Lyon, Université Lyon 1, CNRS, INRA, UMR CNRS 5557, USC INRA 1364, Bâtiment Gregor Mendel, 16, rue Raphael Dubois, 69622, Villeurbanne Cedex, France
| | - Luc Malhautier
- Laboratoire Génie de l'Environnement Industriel, Ecole des Mines d'Alès , Rue Jules Renard, 30100 Alès, France
| | - Thomas Pommier
- Laboratoire d'Ecologie Microbienne, Université de Lyon, Université Lyon 1, CNRS, INRA, UMR CNRS 5557, USC INRA 1364, Bâtiment Gregor Mendel, 16, rue Raphael Dubois, 69622, Villeurbanne Cedex, France
| | - Catherine Lerondelle
- Laboratoire d'Ecologie Microbienne, Université de Lyon, Université Lyon 1, CNRS, INRA, UMR CNRS 5557, USC INRA 1364, Bâtiment Gregor Mendel, 16, rue Raphael Dubois, 69622, Villeurbanne Cedex, France
| | - Willy Verstraete
- LabMET, Faculty Bio-Science Engineering, Ghent University , Coupure L 653, 9000 Gent, Belgium
| | - Anne-Sophie Lepeuple
- Veolia Environnement Recherche et Innovation, Chemin de la Digue, BP76, 78600, Maisons Laffitte, France
| | - Jean-Louis Fanlo
- Laboratoire Génie de l'Environnement Industriel, Ecole des Mines d'Alès , Rue Jules Renard, 30100 Alès, France
| | - Xavier Le Roux
- Laboratoire d'Ecologie Microbienne, Université de Lyon, Université Lyon 1, CNRS, INRA, UMR CNRS 5557, USC INRA 1364, Bâtiment Gregor Mendel, 16, rue Raphael Dubois, 69622, Villeurbanne Cedex, France
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11
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Drennan DM, Almstrand R, Lee I, Landkamer L, Figueroa L, Sharp JO. Organoheterotrophic Bacterial Abundance Associates with Zinc Removal in Lignocellulose-Based Sulfate-Reducing Systems. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:378-387. [PMID: 26605699 DOI: 10.1021/acs.est.5b04268] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Syntrophic relationships between fermentative and sulfate-reducing bacteria are essential to lignocellulose-based systems applied to the passive remediation of mining-influenced waters. In this study, seven pilot-scale sulfate-reducing bioreactor columns containing varying ratios of alfalfa hay, pine woodchips, and sawdust were analyzed over ∼500 days to investigate the influence of substrate composition on zinc removal and microbial community structure. Columns amended with >10% alfalfa removed significantly more sulfate and zinc than did wood-based columns. Enumeration of sulfate reducers by functional signatures (dsrA) and their putative identification from 16S rRNA genes did not reveal significant correlations with zinc removal, suggesting limitations in this directed approach. In contrast, a strong indicator of zinc removal was discerned in comparing the relative abundance of core microorganisms shared by all reactors (>80% of total community), many of which had little direct involvement in metal or sulfate respiration. The relative abundance of Desulfosporosinus, the dominant putative sulfate reducer within these reactors, correlated to representatives of this core microbiome. A subset of these clades, including Treponema, Weissella, and Anaerolinea, was associated with alfalfa and zinc removal, and the inverse was found for a second subset whose abundance was associated with wood-based columns, including Ruminococcus, Dysgonomonas, and Azospira. The construction of a putative metabolic flowchart delineated syntrophic interactions supporting sulfate reduction and suggests that the production of and competition for secondary fermentation byproducts, such as lactate scavenging, influence bacterial community composition and reactor efficacy.
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Affiliation(s)
- Dina M Drennan
- Department of Civil and Environmental Engineering, Colorado School of Mines , 1500 Illinois Street, Golden, Colorado 80401, United States
| | - Robert Almstrand
- Department of Civil and Environmental Engineering, Colorado School of Mines , 1500 Illinois Street, Golden, Colorado 80401, United States
| | - Ilsu Lee
- Freeport McMoRan Inc. 1600 Hanley Blvd., Oro Valley, Arizona 85737, United States
| | - Lee Landkamer
- Department of Civil and Environmental Engineering, Colorado School of Mines , 1500 Illinois Street, Golden, Colorado 80401, United States
| | - Linda Figueroa
- Department of Civil and Environmental Engineering, Colorado School of Mines , 1500 Illinois Street, Golden, Colorado 80401, United States
| | - Jonathan O Sharp
- Department of Civil and Environmental Engineering, Colorado School of Mines , 1500 Illinois Street, Golden, Colorado 80401, United States
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12
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Global metabolomic responses of Nitrosomonas europaea 19718 to cold stress and altered ammonia feeding patterns. Appl Microbiol Biotechnol 2015; 100:1843-1852. [DOI: 10.1007/s00253-015-7095-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 10/04/2015] [Accepted: 10/13/2015] [Indexed: 10/22/2022]
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13
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Naz I, Seher S, Perveen I, Saroj DP, Ahmed S. Physiological activities associated with biofilm growth in attached and suspended growth bioreactors under aerobic and anaerobic conditions. ENVIRONMENTAL TECHNOLOGY 2015; 36:1657-1671. [PMID: 25609155 DOI: 10.1080/09593330.2014.1003614] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This research work evaluated the biofilm succession on stone media and compared the biochemical changes of sludge in attached and suspended biological reactors operated under aerobic and anaerobic conditions. Stones incubated (30±2°C) with activated sludge showed a constant increase in biofilm weight up to the fifth and seventh week time under anaerobic and aerobic conditions, respectively, where after reduction (>80%) the most probable number index of pathogen indicators on ninth week was recorded. Reduction in parameters such as biological oxygen demand (BOD) (47.7%), chemical oxygen demand (COD, 41%), nitrites (60.2%), nitrates (105.5%) and phosphates (58.9%) and increase in dissolved oxygen (176.5%) of sludge were higher in aerobic attached growth reactors as compared with other settings. While, considerable reductions in these values were also observed (BOD, 53.8%; COD, 2.8%; nitrites, 28.6%; nitrates, 31.7%; phosphates, 41.4%) in the suspended growth system under anaerobic conditions. However, higher sulphate removal was observed in suspended (40.9% and 54.9%) as compared with biofilm reactors (28.2% and 29.3%). Six weeks biofilm on the stone media showed maximum physiological activities; thus, the operational conditions should be controlled to keep the biofilm structure similar to six-week-old biofilm, and can be used in fixed biofilm reactors for wastewater treatment.
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Affiliation(s)
- Iffat Naz
- a Department of Microbiology , Quaid-i-Azam University , Islamabad 45320 , Pakistan
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14
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Almstrand R, Persson F, Daims H, Ekenberg M, Christensson M, Wilén BM, Sörensson F, Hermansson M. Three-dimensional stratification of bacterial biofilm populations in a moving bed biofilm reactor for nitritation-anammox. Int J Mol Sci 2014; 15:2191-206. [PMID: 24481066 PMCID: PMC3958845 DOI: 10.3390/ijms15022191] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Revised: 01/10/2014] [Accepted: 01/14/2014] [Indexed: 11/18/2022] Open
Abstract
Moving bed biofilm reactors (MBBRs) are increasingly used for nitrogen removal with nitritation-anaerobic ammonium oxidation (anammox) processes in wastewater treatment. Carriers provide protected surfaces where ammonia oxidizing bacteria (AOB) and anammox bacteria form complex biofilms. However, the knowledge about the organization of microbial communities in MBBR biofilms is sparse. We used new cryosectioning and imaging methods for fluorescence in situ hybridization (FISH) to study the structure of biofilms retrieved from carriers in a nitritation-anammox MBBR. The dimensions of the carrier compartments and the biofilm cryosections after FISH showed good correlation, indicating little disturbance of biofilm samples by the treatment. FISH showed that Nitrosomonas europaea/eutropha-related cells dominated the AOB and Candidatus Brocadia fulgida-related cells dominated the anammox guild. New carriers were initially colonized by AOB, followed by anammox bacteria proliferating in the deeper biofilm layers, probably in anaerobic microhabitats created by AOB activity. Mature biofilms showed a pronounced three-dimensional stratification where AOB dominated closer to the biofilm-water interface, whereas anammox were dominant deeper into the carrier space and towards the walls. Our results suggest that current mathematical models may be oversimplifying these three-dimensional systems and unless the multidimensionality of these systems is considered, models may result in suboptimal design of MBBR carriers.
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Affiliation(s)
- Robert Almstrand
- Department of Chemistry & Molecular Biology, Microbiology, University of Gothenburg, Box 462, Göteborg SE-405 30, Sweden.
| | - Frank Persson
- Water Environment Technology, Department of Civil and Environmental Engineering, Chalmers University of Technology, Göteborg SE-412 96, Sweden.
| | - Holger Daims
- Division of Microbial Ecology, Department of Microbiology and Ecosystem Science, University of Vienna, Vienna 1090, Austria.
| | - Maria Ekenberg
- AnoxKaldnes AB, Klosterängsvägen 11A, Lund SE-226 47, Sweden.
| | | | - Britt-Marie Wilén
- Water Environment Technology, Department of Civil and Environmental Engineering, Chalmers University of Technology, Göteborg SE-412 96, Sweden.
| | - Fred Sörensson
- Department of Chemistry & Molecular Biology, Microbiology, University of Gothenburg, Box 462, Göteborg SE-405 30, Sweden.
| | - Malte Hermansson
- Department of Chemistry & Molecular Biology, Microbiology, University of Gothenburg, Box 462, Göteborg SE-405 30, Sweden.
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15
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New methods for analysis of spatial distribution and coaggregation of microbial populations in complex biofilms. Appl Environ Microbiol 2013; 79:5978-87. [PMID: 23892743 DOI: 10.1128/aem.01727-13] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In biofilms, microbial activities form gradients of substrates and electron acceptors, creating a complex landscape of microhabitats, often resulting in structured localization of the microbial populations present. To understand the dynamic interplay between and within these populations, quantitative measurements and statistical analysis of their localization patterns within the biofilms are necessary, and adequate automated tools for such analyses are needed. We have designed and applied new methods for fluorescence in situ hybridization (FISH) and digital image analysis of directionally dependent (anisotropic) multispecies biofilms. A sequential-FISH approach allowed multiple populations to be detected in a biofilm sample. This was combined with an automated tool for vertical-distribution analysis by generating in silico biofilm slices and the recently developed Inflate algorithm for coaggregation analysis of microbial populations in anisotropic biofilms. As a proof of principle, we show distinct stratification patterns of the ammonia oxidizers Nitrosomonas oligotropha subclusters I and II and the nitrite oxidizer Nitrospira sublineage I in three different types of wastewater biofilms, suggesting niche differentiation between the N. oligotropha subclusters, which could explain their coexistence in the same biofilms. Coaggregation analysis showed that N. oligotropha subcluster II aggregated closer to Nitrospira than did N. oligotropha subcluster I in a pilot plant nitrifying trickling filter (NTF) and a moving-bed biofilm reactor (MBBR), but not in a full-scale NTF, indicating important ecophysiological differences between these phylogenetically closely related subclusters. By using high-resolution quantitative methods applicable to any multispecies biofilm in general, the ecological interactions of these complex ecosystems can be understood in more detail.
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16
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Jing Z, Li YY, Cao S, Liu Y. Performance of double-layer biofilter packed with coal fly ash ceramic granules in treating highly polluted river water. BIORESOURCE TECHNOLOGY 2012; 120:212-217. [PMID: 22820109 DOI: 10.1016/j.biortech.2012.06.069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Revised: 06/16/2012] [Accepted: 06/23/2012] [Indexed: 06/01/2023]
Abstract
To improve trickling filters' denitrification efficiency, a biofilter with a trickling upper layer and a submerged lower layer was developed and applied in treating highly polluted river water. It was packed with porous coal fly ash ceramic granules. Its start-up characteristics, influence of hydraulic loading rates (HLR), carbon/nitrogen (C/N) ratio and filter depth on pollutants removal were investigated. The results indicated this biofilter was started quickly in 16 days with river sediment as inoculum. Alternating nitrification and denitrification were achieved when water flowed downwards. COD and nitrogen were mainly removed in the upper layer and the lower layer, respectively. With HLR of 4.0-5.0m(3)/(m(2)d), chemical oxygen demand (COD), ammonium (NH(4)(+)-N) and total nitrogen (TN) in the effluent were below 50, 5 and 15 mg/L, respectively. This biofilter removed more than 80% of COD, 85% of NH(4)(+)-N and 60% of TN with C/N ratios ranging from 6 to 10.
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Affiliation(s)
- Zhaoqian Jing
- College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China.
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17
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Almstrand R, Lydmark P, Lindgren PE, Sörensson F, Hermansson M. Dynamics of specific ammonia-oxidizing bacterial populations and nitrification in response to controlled shifts of ammonium concentrations in wastewater. Appl Microbiol Biotechnol 2012; 97:2183-91. [DOI: 10.1007/s00253-012-4047-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Revised: 03/16/2012] [Accepted: 03/19/2012] [Indexed: 12/01/2022]
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