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Fra-Vázquez A, Morales N, Figueroa M, Val del Río A, Regueiro L, Campos J, Mosquera-Corral A. Bacterial community dynamics in long-term operation of a pilot plant using aerobic granular sludge to treat pig slurry. Biotechnol Prog 2016; 32:1212-1221. [DOI: 10.1002/btpr.2314] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Revised: 04/22/2016] [Indexed: 12/22/2022]
Affiliation(s)
- A. Fra-Vázquez
- Dept. of Chemical Engineering, Group of Environmental Engineering and Bioprocesses; Inst. of Technology, University of Santiago de Compostela; Santiago de Compostela 15705 Spain
| | - N. Morales
- Dept. of Chemical Engineering, Group of Environmental Engineering and Bioprocesses; Inst. of Technology, University of Santiago de Compostela; Santiago de Compostela 15705 Spain
| | - M. Figueroa
- Dept. of Chemical Engineering, Group of Environmental Engineering and Bioprocesses; Inst. of Technology, University of Santiago de Compostela; Santiago de Compostela 15705 Spain
| | - A. Val del Río
- Dept. of Chemical Engineering, Group of Environmental Engineering and Bioprocesses; Inst. of Technology, University of Santiago de Compostela; Santiago de Compostela 15705 Spain
| | - L. Regueiro
- Dept. of Chemical Engineering, Group of Environmental Engineering and Bioprocesses; Inst. of Technology, University of Santiago de Compostela; Santiago de Compostela 15705 Spain
| | - J.L. Campos
- Faculty of Engineering and Science; Universidad Adolfo Ibáñez; Avda. Padre Hurtado 750 Viña del Mar Chile
| | - A. Mosquera-Corral
- Dept. of Chemical Engineering, Group of Environmental Engineering and Bioprocesses; Inst. of Technology, University of Santiago de Compostela; Santiago de Compostela 15705 Spain
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Val del Río A, Buys B, Campos J, Méndez R, Mosquera-Corral A. Optimizing upflow velocity and calcium precipitation in denitrifying granular systems. Process Biochem 2015. [DOI: 10.1016/j.procbio.2015.05.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Morales N, Val del Río A, Vázquez-Padín JR, Gutiérrez R, Fernández-González R, Icaran P, Rogalla F, Campos JL, Méndez R, Mosquera-Corral A. Influence of dissolved oxygen concentration on the start-up of the anammox-based process: ELAN®. Water Sci Technol 2015; 72:520-527. [PMID: 26247749 DOI: 10.2166/wst.2015.233] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The anammox-based process ELAN® was started-up in two different sequencing batch reactor (SBR) pilot plant reactors treating municipal anaerobic digester supernatant. The main difference in the operation of both reactors was the dissolved oxygen (DO) concentration in the bulk liquid. SBR-1 was started at a DO value of 0.4 mg O2/L whereas SBR-2 was started at DO values of 3.0 mg O2/L. Despite both reactors working at a nitrogen removal rate of around 0.6 g N/(L d), in SBR-1, granules represented only a small fraction of the total biomass and reached a diameter of 1.1 mm after 7 months of operation, while in SBR-2 the biomass was mainly composed of granules with an average diameter of 3.2 mm after the same operational period. Oxygen microelectrode profiling revealed that granules from SBR-2 where only fully penetrated by oxygen with DO concentrations of 8 mg O2/L while granules from SBR-1 were already oxygen penetrated at DO concentrations of 1 mg O2/L. In this way granules from SBR-2 performed better due to the thick layer of ammonia oxidizing bacteria, which accounted for up to 20% of all the microbial populations, which protected the anammox bacteria from non-suitable liquid media conditions.
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Affiliation(s)
- N Morales
- FCC Aqualia, Guillarei WWTP, Tui, E-36720, Spain E-mail:
| | - A Val del Río
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, Lope Gomez de Marzoa s/n, E-15705 Santiago de Compostela, Spain
| | | | - R Gutiérrez
- FCC Aqualia, Guillarei WWTP, Tui, E-36720, Spain E-mail:
| | | | - P Icaran
- FCC Aqualia, Guillarei WWTP, Tui, E-36720, Spain E-mail:
| | - F Rogalla
- FCC Aqualia, Guillarei WWTP, Tui, E-36720, Spain E-mail:
| | - J L Campos
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, Lope Gomez de Marzoa s/n, E-15705 Santiago de Compostela, Spain; Faculty of Engineering and Science, University Adolfo Ibáñez, Avda Padre Hurtado 750, Viña del Mar, Chile
| | - R Méndez
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, Lope Gomez de Marzoa s/n, E-15705 Santiago de Compostela, Spain
| | - A Mosquera-Corral
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, Lope Gomez de Marzoa s/n, E-15705 Santiago de Compostela, Spain
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Morales N, Figueroa M, Fra-Vázquez A, Val del Río A, Campos J, Mosquera-Corral A, Méndez R. Operation of an aerobic granular pilot scale SBR plant to treat swine slurry. Process Biochem 2013. [DOI: 10.1016/j.procbio.2013.06.004] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Val del Río A, Morales N, Figueroa M, Mosquera-Corral A, Campos JL, Méndez R. Effects of the cycle distribution on the performance of SBRs with aerobic granular biomass. Environ Technol 2013; 34:1463-1472. [PMID: 24191480 DOI: 10.1080/09593330.2012.753470] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The aerobic granular systems are mainly sequencing batch reactors where the biomass is submitted to feast-famine regimes to promote its aggregation in the form of granules. In these systems, different cycle distributions can be applied for the simultaneous removal of organic matter, nitrogen and phosphorus. In this work two strategies were followed in order to evaluate the effects of the cycle distribution. In the first experiment, the length of the operational cycle was decreased in order to maximize the treatment capacity and consequently the famine/feast ratio was also decreased. In the second experiment, an initial anoxic phase was implemented to improve nitrogen removal efficiency. The results obtained showed that to reduce the famine/feast ratio from 10 to 5 was possible by increasing the treated organic and nitrogen loading rates in the system to 33%, without affecting the removal efficiencies of organic matter (97%) and nitrogen (64%) and producing a slight detriment of the granules characteristics. On the other hand, the implementation of an anoxic phase of 30 min previous to the aerobic one with a pulse-fed mode increased the nitrogen removal of pig manure from 20 to 60%, while the cycle configuration comprising a continuous feeding simultaneous with an anoxic phase of 60 min did not enhance the nitrogen removal and even worsen the ammonia oxidation.
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Affiliation(s)
- A Val del Río
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, Santiago de Compostela, Spain.
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Val del Río A, Figueroa M, Arrojo B, Mosquera-Corral A, Campos JL, García-Torriello G, Méndez R. Aerobic granular SBR systems applied to the treatment of industrial effluents. J Environ Manage 2012; 95 Suppl:S88-S92. [PMID: 21477918 DOI: 10.1016/j.jenvman.2011.03.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2009] [Revised: 01/25/2011] [Accepted: 03/15/2011] [Indexed: 05/30/2023]
Abstract
Four lab scale sequencing batch reactors (SBRs) were operated to remove organic matter and nitrogen from four different industrial wastewaters. The biomass grew in the reactors in the form of aerobic granules characterized by good settling properties. The high biomass concentrations achieved inside the reactors allowed reducing the solids concentration in the effluent down to 0.2 g VSS L(-1). The organic loading rates (OLR) applied to reactors ranged between 0.7 and 5.0 g CODL(-1)d(-1) with removal efficiencies of 60-95%. The nitrogen loading rates (NLR) applied varied between 0.15 and 0.65 g NH(4)(+)-NL(-1)d(-1) with variable removal efficiencies in the four systems (between 15% and 76%).
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Affiliation(s)
- A Val del Río
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, Rúa Lópe Gómez de Marzoa s/n, E-15782 Santiago de Compostela, Spain.
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Val del Río A, Morales N, Isanta E, Mosquera-Corral A, Campos JL, Steyer JP, Carrère H. Thermal pre-treatment of aerobic granular sludge: impact on anaerobic biodegradability. Water Res 2011; 45:6011-20. [PMID: 21924756 DOI: 10.1016/j.watres.2011.08.050] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2011] [Revised: 08/22/2011] [Accepted: 08/29/2011] [Indexed: 05/16/2023]
Abstract
The aerobic granular systems are a good alternative to the conventional activated sludge (AS) ones to reduce the production of sludge generated in wastewater treatment plants (WWTP). Although the quantity of produced sludge is low its post-treatment is still necessary. In the present work the application of the anaerobic digestion combined with a thermal pre-treatment was studied to treat two different aerobic granular biomasses: one from a reactor fed with pig manure (G1) and another from a reactor fed with a synthetic medium to simulate an urban wastewater (G2). The results obtained with the untreated aerobic granular biomasses showed that their anaerobic biodegradability (BD) (33% for G1 and 49% for G2) was similar to that obtained for an activated sludge (30-50%) and demonstrate the feasibility of their anaerobic digestion. The thermal pre-treatment before the anaerobic digestion was proposed as a good option to enhance the BD when this was initially low (33% G1) with an enhancement between 20% at 60 °C and 88% at 170 °C with respect to the untreated sludge. However when the initial BD was higher (49% G2) the thermal pre-treatment produced a slight improvement in the methane production (14% and 18%) and at high temperatures (190 and 210 °C) which did not justify the application of such a treatment.
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Affiliation(s)
- A Val del Río
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
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Seca I, Torres R, Val del Río A, Mosquera-Corral A, Campos JL, Méndez R. Application of biofilm reactors to improve ammonia oxidation in low nitrogen loaded wastewater. Water Sci Technol 2011; 63:1880-1886. [PMID: 21902026 DOI: 10.2166/wst.2011.400] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
An airlift reactor using zeolite particles as carrier material was used for the nitrification of effluents from the aquaculture industry. During the start-up the nitrogen concentration was kept around 100 mg NH4(+)-N/L to develop the nitrifying population. Later it was decreased down to around 3 mg NH4(+)-N/L and the dilution rate was increased up to 4.8 d(-1) in order to simulate the conditions in a an aquaculture waster treatment system. A nitrogen loading rate (NLR) of 535 mg NH(+)-N/m2 d was fully oxidized to nitrate. Higher values of NLRs caused nitrite accumulation. A second biofilm reactor was fed with a synthetic medium containing 50 mg NH4(+)-N/L which simulated the effluents from anaerobic units treating domestic wastewater. A nitrogen loading rate of 400 mg NH4(+)-N/L d was oxidized into nitrate with an efficiency of 60% at a dilution rate of 8 d(-1). Both biofilm systems allowed the development of a nitrifying population to treat the studied types of wastewaters.
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Affiliation(s)
- I Seca
- Department of Chemical Engineering, School of Engineering, Rua Lope Gómez de Marzoa s/n, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
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Figueroa M, Val del Río A, Campos JL, Mosquera-Corral A, Méndez R. Treatment of high loaded swine slurry in an aerobic granular reactor. Water Sci Technol 2011; 63:1808-1814. [PMID: 21902017 DOI: 10.2166/wst.2011.381] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Aerobic granular sludge grown in a sequential batch reactor was proposed as an alternative to anaerobic processes for organic matter and nitrogen removal from swine slurry. Aerobic granulation was achieved with this wastewater after few days from start-up. On day 140 of operation, the granular properties were: 5 mm of average diameter, SVI of 32 mL (g VSS)(-1) and density around 55 g VSS (L(granule))(-1). Organic matter removal efficiencies up to 87% and nitrogen removal efficiencies up to 70% were achieved during the treatment of organic and nitrogen loading rates (OLR and NLR) of 4.4 kg COD m(-3) d(-1) and of 0.83 kg N m(-3) d(-1), respectively. However, nitrogen removal processes were negatively affected when applied OLR was 7.0 kg COD m(-3) d(-1) and NLR was 1.26 kg N m(-3) d(-1). The operational cycle of the reactor was modified by reducing the volumetric exchange ratio from 50 to 6% in order to be able to treat the raw slurry without dilution.
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Affiliation(s)
- M Figueroa
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, Lope Gómez de Marzoa, S/n, E-15782, Spain.
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