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Author Alejo, L.; Atkinson, J.; Lackner, S.
Title Looking deeper – exploring hidden patterns in reactor data of N-removal systems through clustering analysis Type
Year 2020 Publication Water Science and Technology Abbreviated Journal Water Sci. Technol.
Volume 81 Issue 8 Pages 1569-1577
Keywords clustering; feature selection; k-means; partial nitritation-anammox
Abstract In this work, clustering analysis of two partial nitritation-anammox (PN-A) moving bed biofilm reactors (MBBR) containing different types of carrier material was explored for the identification of patterns and operational conditions that may benefit process performance. The systems ran for two years under fluctuations of temperature and organic matter. Ex situ batch activity tests were performed every other week during the operation of these reactors. These datasets and the parameters, which were monitored online and in the laboratory, were combined and analyzed applying clustering analysis to identify non-obvious information regarding the performance of the systems. The initial results were consistent with the literature and from an operational perspective, which allowed the parameters to be explored further. The new information revealed that the oxidation reduction potential (ORP) and the anaerobic ammonium oxidizing bacteria (AnAOB) activity correlated well. ORP also dropped when the reactors were exposed to real wastewater (presence of organic matter). Moreover, operating conditions during nitrite accumulation were identified through clustering, and also revealed inhibition of anammox bacteria already at low nitrite concentrations.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0273-1223 ISBN Medium
Area Expedition Conference
Notes Approved
Call Number UAI @ eduardo.moreno @ Serial 1123
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Author Bonassa, G.; Bolsan, A.C.; Hollas, C.E.; Venturin, B.; Candido, D.; Chini, A.; De Pra, M.C.; Antes, F.G.; Campos, J.L.; Kunz, A.
Title Organic carbon bioavailability: Is it a good driver to choose the best biological nitrogen removal process? Type
Year 2021 Publication Science Of The Total Environment Abbreviated Journal Sci. Total Environ.
Volume 786 Issue Pages 147390
Keywords Economic viability; Anammox-based process; Biodegradable organic carbon concentration; Nitrogen removal process; Nitrification; denitrification
Abstract Organic carbon can affect the biological nitrogen removal process since the Anammox, heterotrophic and denitrifying bacteria have different affinities and feedback in relation to carbon/nitrogen ratio. Therefore, we reviewed the wastewater carbon concentration, its biodegradability and bioavailability to choose the appropriate nitrogen removal process between conventional (nitrification-denitrification) and Anammox-based process (i.e. integrated with the partial nitritation, nitritation, simultaneous partial nitrification and denitrification or partial-denitrification). This review will cover: (i) strategies to choose the best nitrogen removal route according to the wastewater characteristics in relation to the organic matter bioavailability and biodegradability; (ii) strategies to efficiently remove nitrogen and the remaining carbon from effluent in anammox-based process and its operating cost; (iii) an economic analysis to determine the operational costs of two-units Anammox-based process when compared with the commonly applied one-unit Anammox system (partial-nitritation-Anammox). On this re-view, a list of alternatives are summarized and explained for different nitrogen and biodegradable organic carbon concentrations, which are the main factors to determine the best treatment process, based on operational and economic terms. In summary, it depends on the wastewater carbon biodegradability, which implies in the wastewater treatment cost. Thus, to apply the conventional nitrification/denitrification process a CODb/N ratio higher than 3.5 is required to achieve full nitrogen removal efficiency. For an economic point of view, according to the analysis the minimum CODb/gN for successful nitrogen removal by nitrification/denitrification is 5.8 g. If ratios lower than 3.5 are applied, for successfully higher nitrogen removal rates and the economic feasibility of the treatment, Anammox-based routes can be applied to the wastewater treatment plant.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0048-9697 ISBN Medium
Area Expedition Conference
Notes WOS:000687095700013 Approved
Call Number UAI @ alexi.delcanto @ Serial 1459
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Author Campos, J.L.; del Rio, A.V.; Pedrouso, A.; Raux, P.; Giustinianovich, E.A.; Mosquera-Corral, A.
Title Granular biomass floatation: A simple kinetic/stoichiometric explanation Type
Year 2017 Publication Chemical Engineering Journal Abbreviated Journal Chem. Eng. J.
Volume 311 Issue Pages 63-71
Keywords Anaerobic; Anammox; Denitrification; Granule; Methane; Nitrogen
Abstract Floatation events are commonly observed in anammox, denitrifying and anaerobic granular systems mostly subjected to overloading conditions. Although several operational strategies have been proposed to avoid floatation of granular biomass, until now, there is no consensus about the conditions responsible for this phenomenon. In the present study, a simple explanation based on kinetic and stoichiometric principles defining the aforementioned processes is provided. The operational zones corresponding to evaluated parameters where risk of floatation exists are defined as a function of substrate concentration in the bulk liquid and the radius of the granule. Moreover, the possible control of biomass floatation by changing the operating temperature was analyzed. Defined operational zones and profiles fit data reported in literature for granular biomass floatation events. From the study the most influencing parameter on floatation occurrence has been identified as the substrate concentration in the bulk media. (C) 2016 Elsevier B.V. All rights reserved.
Address [Campos, J. L.; Raux, P.] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Avda Padre Hurtado 750, Vina Del Mar, Chile, Email: jluis.campos@uai.cl
Corporate Author Thesis
Publisher Elsevier Science Sa Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1385-8947 ISBN Medium
Area Expedition Conference
Notes WOS:000392768200008 Approved
Call Number UAI @ eduardo.moreno @ Serial 697
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Author del Rio, A.V.; da Silva, T.; Martins, T.H.; Foresti, E.; Campos, J.L.; Mendez, R.; Mosquera-Corral, A.
Title Partial Nitritation-Anammox Granules: Short-Term Inhibitory Effects of Seven Metals on Anammox Activity Type
Year 2017 Publication Water Air And Soil Pollution Abbreviated Journal Water Air Soil Pollut.
Volume 228 Issue 11 Pages 9 pp
Keywords Ammonia oxidizing bacteria; Anammox; Granules; IC50; Nitrogen removal
Abstract The inhibitory effect of seven different metals on the specific anammox activity of granular biomass, collected from a single stage partial nitritation/anammox reactor, was evaluated. The concentration of each metal that led to a 50% inhibition concentration (IC50) was 19.3 mg Cu+2/L, 26.9 mg Cr+2/L, 45.6 mg Pb+2/L, 59.1 mg Zn+2/L, 69.2 mg Ni+2/L, 174.6 mg Cd+2/L, and 175.8 mg Mn+2/L. In experiments performed with granules mechanically disintegrated (flocculent-like sludge), the IC50 for Cd+2 corresponded to a concentration of 93.1 mg Cd+2/L. These results indicate that the granular structure might act as a physical barrier to protect anammox bacteria from toxics. Furthermore, the presence of an external layer of ammonia oxidizing bacteria seems to mitigate the inhibitory effect of the metals, as the values of IC50 obtained in this study for anammox activity were higher than those previously reported for anammox granules. Additionally, the results obtained confirmed that copper is one of the most inhibitory metals for anammox activity and revealed that chromium, scarcely studied yet, has a similar potential inhibitory effect.
Address [del Rio, Angeles Val; Mendez, Ramon; Mosquera-Corral, Anuska] Univ Santiago de Compostela, Inst Technol, Dept Chem Engn, E-15782 Santiago De Compostela, Spain, Email: mangeles.val@usc.es
Corporate Author Thesis
Publisher Springer Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0049-6979 ISBN Medium
Area Expedition Conference
Notes WOS:000415958200002 Approved
Call Number UAI @ eduardo.moreno @ Serial 790
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Author del Rio, A.V.; Stachurski, A.; Mendez, R.; Campos, J.L.; Surmacz-Gorska, J.; Mosquera-Corral, A.
Title Short- and long-term orange dye effects on ammonium oxidizing and anammox bacteria activities Type
Year 2017 Publication Water Science And Technology Abbreviated Journal Water Sci. Technol.
Volume 76 Issue 1 Pages 79-86
Keywords adsorption; anammox; AOB; degradation; orange dye; partial nitritation
Abstract The effects of orange azo dye over ammonia oxidizing bacteria (AOB) and anammox bacteria activities were tested. Performed batch tests indicated that concentrations lower than 650 mg(orange)/L stimulated AOB activity, while anammox bacteria activity was inhibited at concentrations higher than 25 mg(orange)/L. Long-term performance of a continuous stirred tank reactor (CSTR) for the partial nitritation and a sequencing batch reactor (SBR) for the anammox process was tested in the presence of 50 mg(orange)/L. In the case of the partial nitritation process, both the biomass concentration and the specific AOB activity increased after 50 days of orange azo dye addition. Regarding the anammox process, specific activity decreased down to 58% after 12 days of operation with continuous feeding of 50 mg(orange)/L. However, the anammox activity was completely recovered only 54 days after stopping the dye addition in the feeding. Once the biomass was saturated the azo dye adsorption onto the biomass was insignificant in the CSTR for the partial nitritation process fed with 50 mg(orange)/L. However, in the SBR the absorption was determined as 6.4 mg(orange)/g volatile suspended solids. No biological decolorization was observed in both processes.
Address [Val del Rio, A.; Mendez, R.; Mosquera-Corral, A.] Univ Santiago de Compostela, Sch Engn, Dept Chem Engn, E-15782 Santiago De Compostela, Spain, Email: mangeles.val@usc.es
Corporate Author Thesis
Publisher Iwa Publishing Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0273-1223 ISBN Medium
Area Expedition Conference
Notes WOS:000405591400008 Approved
Call Number UAI @ eduardo.moreno @ Serial 748
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Author Diaz, C.; Belmonte, M.; Campos, J.L.; Franchi, O.; Faundez, M.; Vidal, G.; Argiz, L.; Pedrouso, A.; del Rio, A.V.; Mosquera-Corral, A.
Title Limits of the anammox process in granular systems to remove nitrogen at low temperature and nitrogen concentration Type
Year 2020 Publication Process Safety And Environmental Protection Abbreviated Journal Process Saf. Environ. Protect.
Volume 138 Issue Pages 349-355
Keywords Anammox; Dissolved oxygen; Granular biomass; Nitrogen; SRT; Temperature
Abstract When partial nitritation-anammox (PN-AMX) processes are applied to treat the mainstream in wastewater treatment plants (WWTPs), it is difficult to fulfil the total nitrogen (TN) quality requirements established by the European Union (<10g TN/m(3)). The operation of the anammox process was evaluated here in a continuous stirred tank reactor operated at 15 degrees C and fed with concentrations of 50 g TN/m(3) (1.30 +/- 0.23 g NO2- -N/g NH4+-N). Two different aspects were identified as crucial, limiting nitrogen removal efficiency. On the one hand, the oxygen transferred from the air in contact with the mixed liquor surface favoured the nitrite oxidation to nitrate (up to 75 %) and this nitrate, in addition to the amount produced from the anammox reaction itself, worsened the effluent quality. On the other hand, the mass transfer of ammonium and nitrite to be converted inside the anammox granules involves relatively large values of apparent affinity constants (k(NH4+app) : 0.50 g NH4+-N/m(3) ; k(NO2-app) 0.17 g NO2--N/m(3)) that favour the presence of these nitrogen compounds in the produced effluent. The careful isolation of the reactor from air seeping and the fixation of right hydraulic and solids retention times are expected to help the maintenance of stability and effluent quality. (C) 2020 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
Address [Diaz, Claudia; Belmonte, Marisol] Univ Playa Ancha, Fac Ingn, Lab Biotecnol Medio Ambiente & Ingn LABMAI, Avda Leopoldo Carvallo 270, Valparaiso 2340000, Chile, Email: jluis.campos@uai.cl
Corporate Author Thesis
Publisher Elsevier Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0957-5820 ISBN Medium
Area Expedition Conference
Notes WOS:000538807400005 Approved
Call Number UAI @ eduardo.moreno @ Serial 1193
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Author Giustinianovich, E.A.; Campos, J.L.; Roeckel, M.D.
Title The presence of organic matter during autotrophic nitrogen removal: Problem or opportunity? Type
Year 2016 Publication Separation And Purification Technology Abbreviated Journal Sep. Purif. Technol.
Volume 166 Issue Pages 102-108
Keywords Anammox; Ammonia oxidation; Heterotrophic denitrification; Nitrogen removal; SNAD
Abstract The simultaneous nitrification, Anammox and denitrification (SNAD) process discovered six years ago is an adaptation of the autotrophic denitrification process that allows for treating nitrogen-rich wastewater streams with moderate amounts of organic carbon. Several authors have noted that it is possible to utilize organic carbon to promote nitrogen removal via the action of denitrifying microorganisms, which can remove the remnant nitrate produced by Anammox bacteria. Thus, SNAD systems can achieve nitrogen removal efficiencies higher than 89%, which is what is expected under autotrophic conditions. Three bacterial groups are responsible for SNAD reactions: ammonium-oxidizing bacteria (AOB), anaerobic ammonium-oxidizing bacteria (AnAOB) and heterotrophic bacteria (HB). Because HB will compete with AOB and AnAOB for oxygen and nitrite, respectively, the system should be operated in such way that a balance among the different bacterial populations is achieved. Here, the results reported in the literature are analyzed to define suitable characteristics of effluents for treatment and operational conditions to allow the SNAD process to be carried out with different types of technologies. (C) 2016 Elsevier B.V. All rights reserved.
Address [Giustinianovich, Elisa A.; Roeckel, Marlene D.] Univ Concepcion, Dept Chem Engn, Casilla 160-C, Concepcion, Chile, Email: mroeckel@udec.cl
Corporate Author Thesis
Publisher Elsevier Science Bv Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1383-5866 ISBN Medium
Area Expedition Conference
Notes WOS:000376834400013 Approved
Call Number UAI @ eduardo.moreno @ Serial 827
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Author Giustinianovich, E.A.; Campos, J.L.; Roeckel, M.D.; Estrada, A.J.; Mosquera-Corral, A.; del Rio, A.V.
Title Influence of biomass acclimation on the performance of a partial nitritation-anammox reactor treating industrial saline effluents Type
Year 2018 Publication Chemosphere Abbreviated Journal Chemosphere
Volume 194 Issue Pages 131-138
Keywords Anammox; Canning industry effluents; Nitrogen removal; Partial nitritation; Saline effluents
Abstract The performance of the partial nitritation/anammox processes was evaluated for the treatment of fish canning effluents. A sequencing batch reactor (SBR) was fed with industrial wastewater, with variable salt and total ammonium nitrogen (TAN) concentrations in the range of 1.75-18.00 g-NaCl L-1 and 112 – 267 mg-TAN L-1. The SBR operation was divided into two experiments: (A) progressive increase of salt concentrations from 1.75 to 1833 g-NaCl L-1; (B) direct application of high salt concentration (18 g-NaCl L-1). The progressive increase of NaCl concentration provoked the inhibition of the anammox biomass by up to 94% when 18 g-NaCl L-1 were added. The stable operation of the processes was achieved after 154 days when the nitrogen removal rate was 0.021 +/- 0.007 g N/L.d (corresponding to 30% of removal efficiency). To avoid the development of NOB activity at low salt concentrations and to stabilize the performance of the processes dissolved oxygen was supplied by intermittent aeration. A greater removal rate of 0.029 +/- 0.017 g-N L-1 d(-1) was obtained with direct exposure of the inoculum to 18 g-NaCl L-1 in less than 40 days. Also, higher specific activities than those from the inoculum were achieved for salt concentrations of 15 and 20 g-NaCl L-1 after 39 days of operation. This first study of the performance of the partial nitritation/anammox processes, to treat saline wastewaters, indicates that the acclimation period can be avoided to shorten the start-up period for industrial application purposes. Nevertheless, further experiments are needed in order to improve the efficiency of the processes. (C) 2017 Elsevier Ltd. All rights reserved.
Address [Giustinianovich, Elisa A.; Roeckel, Marlene D.] Univ Concepcion, Dept Chem Engn, Concepcion, Chile, Email: mangeles.val@usc.es
Corporate Author Thesis
Publisher Pergamon-Elsevier Science Ltd Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0045-6535 ISBN Medium
Area Expedition Conference
Notes WOS:000423890700017 Approved
Call Number UAI @ eduardo.moreno @ Serial 817
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Author Jara-Munoz, P.; Guzman-Fierro, V.; Arriagada, C.; Campos, V.; Campos, J.L.; Gallardo-Rodriguez, J.J.; Fernandez, K.; Roeckel, M.
Title Low oxygen start-up of partial nitrification-anammox process: mechanical or gas agitation? Type
Year 2019 Publication Journal Of Chemical Technology And Biotechnology Abbreviated Journal J. Chem. Technol. Biotechnol.
Volume 94 Issue 2 Pages 475-483
Keywords mechanical agitation; partial nitrification anammox; dissolved oxygen; gas agitation; granule
Abstract BACKGROUND Partial nitrification-anammox (PN-A) is a widely recognized technology to remove nitrogen from different types of wastewater. Low oxygen concentration is the most used strategy for PN-A start-up, but stability problems arise during the operation; thus, in the present study the effects of the type of agitation, oxygenation and shear stress on the sensitivity, energy consumption and performance were evaluated. Recognition of these parameters allows considered choice of the design of an industrial process for nitrogen abatement. RESULTS A mechanically agitated reactor (MAR) was compared to a stable, long-term operation period bubble column reactor (BCR), both started under low dissolved oxygen concentration conditions. MAR microbial assays confirmed the destruction of the nitrifying layer and an imbalance of the entire process when the oxygen to nitrogen loading ratio (O-2:N) decreased by 25%. The granule sedimentation rate and specific anammox activity were 17% and 87% higher (respectively) in BCR. Economic analysis determined that the cost of aeration for the MAR and for the BCR were 23.8% and 1% of the total PN-A energy consumption, respectively. CONCLUSIONS The BCR showed better results than the MAR. This study highlights the importance of type of agitation, oxygenation and shear stress for industrial-scale PN-A designs. (c) 2018 Society of Chemical Industry
Address [Jara-Munoz, Pamela; Guzman-Fierro, Victor; Arriagada, Constanza; Jose Gallardo-Rodriguez, Juan; Fernandez, Katherina; Roeckel, Marlene] Univ Concepcion, Dept Chem Engn, Fac Engn, Concepcion, Chile, Email: mroeckel@udec.cl
Corporate Author Thesis
Publisher Wiley Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0268-2575 ISBN Medium
Area Expedition Conference
Notes WOS:000455262100014 Approved
Call Number UAI @ eduardo.moreno @ Serial 972
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Author Morales, N.; del Rio, A.V.; Vazquez-Padin, J.R.; Gutierrez, R.; Fernandez-Gonzalez, R.; Icaram, P.; Rogalla, F.; Campos, J.L.; Mendez, R.; Mosquera-Corral, A.
Title Influence of dissolved oxygen concentration on the start-up of the anammox-based process: ELAN (R) Type
Year 2015 Publication Water Science And Technology Abbreviated Journal Water Sci. Technol.
Volume 72 Issue 4 Pages 520-527
Keywords anammox; autotrophic nitrogen removal; dissolved oxygen; granule; oxygen microprofiles
Abstract The anammox-based process ELAN (R) 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 O-2/L whereas SBR-2 was started at DO values of 3.0 mg O-2/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.
Address [Morales, N.; Vazquez-Padin, J. R.; Gutierrez, R.; Fernandez-Gonzalez, R.; Icaram, P.; Rogalla, F.] Guillarei WWTP, FCC Aqualia, E-36720 Tui, Spain, Email: nicolas.morales.pereira@fcc.es
Corporate Author Thesis
Publisher Iwa Publishing Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0273-1223 ISBN Medium
Area Expedition Conference
Notes WOS:000359387200003 Approved
Call Number UAI @ eduardo.moreno @ Serial 518
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Author Morales, N.; del Rio, A.V.; Vazquez-Padin, J.R.; Mendez, R.; Campos, J.L.; Mosquera-Corral, A.
Title The granular biomass properties and the acclimation period affect the partial nitritation/anammox process stability at a low temperature and ammonium concentration Type
Year 2016 Publication Process Biochemistry Abbreviated Journal Process Biochem.
Volume 51 Issue 12 Pages 2134-2142
Keywords Anammox; AOB; Granules; Nitrogen; NOB; Partial nitritation
Abstract Extensive research on the anammox-based processes under mainstream conditions is currently in progress. Most studies have used a long acclimation period for the partial nitritation-anammox (PN-An) sludge at a low temperature and ammonium concentration. However, in this study, the results demonstrated that PN-An granular biomass produced under sidestream conditions (30 degrees C and 1000 mg NH4+-N/L) can operate at 15 degrees C and 50 mg NH4+-N/L without acclimation. The nitrogen removal efficiency was 70% and was stable for 60 days. The long-termoperation of the system with progressive adaptation provided important information for process optimization. Control of the dissolved oxygen (DO) concentration was crucial to maintain the balance between ammonia oxidizing bacteria (AOB) and anammox bacteria activities. A calculation of the oxygen penetration depth inside the granules is proposed to estimate an adequate DO level, which allows for the definition of the aerobic and anoxic zones that depend on the temperature, the size distribution and the granule density. However, the development of NOB was difficult to avoid with DO control alone. The selective washing-out of the floccular biomass, which contains mainly NOB, is proposed, leaving the granular fraction with the AOB and anammox bacteria in the system. (C) 2016 Published by Elsevier Ltd.
Address [Morales, Nicolas; del Rio, Angeles Val; Mendez, Ramon; Campos, Jose L.; Mosquera-Corral, Anuska] Univ Santiago de Compostela, Inst Technol, Dept Chem Engn, E-15705 Santiago De Compostela, Spain, Email: nicolas.morales@usc.es;
Corporate Author Thesis
Publisher Elsevier Sci Ltd Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1359-5113 ISBN Medium
Area Expedition Conference
Notes WOS:000390733500029 Approved
Call Number UAI @ eduardo.moreno @ Serial 685
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Author Morales, N.; del Rio, A.V.; Vazquez-Padin, J.R.; Mendez, R.; Mosquera-Corral, A.; Campos, J.L.
Title Integration of the Anammox process to the rejection water and main stream lines of WWTPs Type
Year 2015 Publication Chemosphere Abbreviated Journal Chemosphere
Volume 140 Issue Pages 99-105
Keywords Anammox; Energetic efficiency; Greenhouse gas emission; Main stream; Temperature
Abstract Nowadays the application of Anammox based processes in the wastewater treatment plants has given a step forward. The new goal consists of removing the nitrogen present in the main stream of the WWTTPs to improve their energetic efficiencies. This new approach aims to remove not only the nitrogen but also to provide a better use of the energy contained in the organic matter. The organic matter will be removed either by an anaerobic psychrophilic membrane reactor or an aerobic stage operated at low solids retention time followed by an anaerobic digestion of the generated sludge. Then ammonia coming from these units will be removed in an Anammox based process in a single unit system. The second strategy provides the best results in terms of operational costs and would allow reductions of about 28%. Recent research works performed on Anammox based processes and operated at relatively low temperatures and/or low ammonia concentrations were carried out in single-stage systems using biofilms, granules or a mixture of flocculent nitrifying and granular Anammox biomasses. These systems allowed the appropriated retention of Anammox and ammonia oxidizing bacteria but also the proliferation of nitrite oxidizing bacteria which seems to be the main drawback to achieve the required effluent quality for disposal. Therefore, prior to the implementation of the Anammox based processes at full scale to the water line, a reliable strategy to avoid nitrite oxidation should be defined in order to maintain the process stability and to obtain the desired effluent quality. If not, the application of a post-denitrification step should be necessary. (C) 2015 Elsevier Ltd. All rights reserved.
Address [Morales, Nicolas; Val del Rio, Angeles; Mendez, Ramon; Mosquera-Corral, Anuska; Luis Campos, Jose] Univ Santiago de Compostela, Sch Engn, Dept Chem Engn, E-15782 Santiago De Compostela, Spain, Email: nicolas.morales.pereira@fcc.es;
Corporate Author Thesis
Publisher Pergamon-Elsevier Science Ltd Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0045-6535 ISBN Medium
Area Expedition Conference
Notes WOS:000357232000014 Approved
Call Number UAI @ eduardo.moreno @ Serial 507
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Author Pedrouso, A.; del Rio, A.V.; Campos, J.L.; Mendez, R.; Mosquera-Corral, A.
Title Biomass aggregation influences NaN3 short-term effects on anammox bacteria activity Type
Year 2017 Publication Water Science And Technology Abbreviated Journal Water Sci. Technol.
Volume 75 Issue 5 Pages 1007-1013
Keywords anammox; granules; inhibition; NOB; partial nitritation; sodium azide
Abstract The main bottleneck to maintain the long-term stability of the partial nitritation-anammox processes, especially those operated at low temperatures and nitrogen concentrations, is the undesirable development of nitrite oxidizing bacteria (NOB). When this occurs, the punctual addition of compounds with the capacity to specifically inhibit NOB without affecting the process efficiency might be of interest. Sodium azide (NaN3) is an already known NOB inhibitor which at low concentrations does not significantly affect the ammonia oxidizing bacteria (AOB) activity. However, studies about its influence on anammox bacteria are unavailable. For this reason, the objective of the present study was to evaluate the effect of NaN3 on the anammox activity. Three different types of anammox biomass were used: granular biomass comprising AOB and anammox bacteria (G1), anammox enriched granules (G2) and previous anammox granules disaggregated (F1). No inhibitory effect of NaN3 was measured on G1 sludge. However, the anammox activity decreased in the case of G2 and F1. Granular biomass activity was less affected (IC50 90 mg/L, G2) than flocculent one (IC50 5 mg/L, F1). Summing up, not only does the granular structure protect the anammox bacteria from the NaN3 inhibitory effect, but also the AOB act as a barrier decreasing the inhibition.
Address [Pedrouso, A.; Val del Rio, A.; Mendez, R.; Mosquera-Corral, A.] Univ Santiago de Compostela, Sch Engn, Dept Chem Engn, E-15705 Santiago De Compostela, Spain, Email: alba.pedrouso@usc.es
Corporate Author Thesis
Publisher Iwa Publishing Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0273-1223 ISBN Medium
Area Expedition Conference
Notes WOS:000395822800001 Approved
Call Number UAI @ eduardo.moreno @ Serial 712
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Author Pedrouso, A.; del Rio, A.V.; Morales, N.; Vazquez-Padin, J.R.; Campos, J.L.; Mosquera-Corral, A.
Title Mainstream anammox reactor performance treating municipal wastewater and batch study of temperature, pH and organic matter concentration cross-effects Type
Year 2021 Publication Process Safety and Environmental Protection Abbreviated Journal Process Saf. Environ. Protect.
Volume 145 Issue Pages 195-202
Keywords Alkalinity; Autotrophic nitrogen removal; Inorganic carbon; Mainstream; Low temperature; Specific anammox activity
Abstract The anammox process is an energy efficient promising alternative to biologically remove the nitrogen. Thus, a 5-L anammox granular reactor was inoculated with sludge coming from a sidestream partial nitritation and anammox reactor (>200 mg TN/L and 30 degrees C) and it was directly subjected to 15 +/- 1 degrees C treating mimicked municipal wastewater (50 mg TN/L). Results indicated that an acclimation period (commonly used) to progressive reach the mainstream conditions is not needed, shortening the start-up periods. The long-term anammox process stability was proved to treat synthetic wastewater with decreasing alkalinities and nitritified primary settled municipal wastewater. The low pH values (6.2 +/- 0.1) of the municipal wastewater fed did not affect the process stability. Residual organic matter concentrations augmented the nitrogen removal efficiency from 80 % (with the synthetic medium) to 92 % achieving effluent concentrations below 10 mg TN/L. Finally, the effect of pH (6-8), temperature (15-30 degrees C) and organic matter concentration (0-75 mg TOC/L) over the specific anammox activity (SA(Amx)) was evaluated at short-term. pH and temperature and their interactions exerted significant influence on the SAAmx value while the TOC concentrations itself did not significantly change the SA(AMX). (C) 2020 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0957-5820 ISBN Medium
Area Expedition Conference
Notes WOS:000604751700017 Approved
Call Number UAI @ alexi.delcanto @ Serial 1325
Permanent link to this record
 

 
Author Pedrouso, A.; Tocco, G.; val del Rio, A.; Carucci, A.; Morales, N.; Campos, J.L.; Milia, S.; Mosquera-Corral, A.
Title Digested blackwater treatment in a partial nitritation-anammox reactor under repeated starvation and reactivation periods Type
Year 2020 Publication Journal Of Cleaner Production Abbreviated Journal J. Clean Prod.
Volume 244 Issue Pages 9 pp
Keywords Anammox; Blackwater; Decentralized systems; Nitritation; Starvation; Wastewater source separation
Abstract Wastewater source-separation and on-site treatment systems face severe problems in wastewater availability. Therefore, the effect of repeated short-term starvation and reactivation periods on a partial nitritation-anammox (PN/AMX) based processes were assessed treating digested blackwater at room temperature. Two sequencing batch reactors (SBR) were operated, one of them during 24 h/day the whole week (SBR-C, which served as control) and the other with repeated starvation/reactivation periods during the nights and the weekends (SBR-D), using simulated blackwater (300 mg N/L and 200 mg COD/L) as substrate. Results showed no remarkable differences in overall processes performance between both reactors, achieving total nitrogen removal efficiencies (NRE) around 90%. Furthermore, no significant variations were measured in specific activities, except for the aerobic heterotrophic one that was lower in SBR-D, presumably due to the exposure to anoxic conditions. Then, the technical feasibility of applying the PN/AMX system to treat real blackwater produced in an office building during working hours was successfully proved in a third reactor (SBR-R), with the same starvation/reactivation periods tested in SBR-D. Despite the low temperature, ranging from 14 to 21 degrees C, total NRE up to 95% and total nitrogen concentration in the effluent lower than 10 mg N/L were achieved. Moreover, the PN/AMX process performance was immediately recovered after a long starvation period of 15 days (simulating holidays). Results proved for the first time the feasibility and long-term stability (100 days) of applying the PN/AMX processes for the treatment (and potential reuse) of blackwater in a decentralized system where wastewater is not always available. (C) 2019 Elsevier Ltd. All rights reserved.
Address [Pedrouso, Alba; Val del Rio, Angeles; Mosquera-Corral, Anuska] Univ Santiago de Compostela, Dept Chem Engn, CRETUS Inst, E-15705 Santiago De Compostela, Spain, Email: alba.pedrouso@usc.es;
Corporate Author Thesis
Publisher Elsevier Sci Ltd Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0959-6526 ISBN Medium
Area Expedition Conference
Notes WOS:000503172600066 Approved
Call Number UAI @ eduardo.moreno @ Serial 1079
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Author Pichel, A.; Fra, A.; Morales, N.; Campos, J.L.; Mendez, R.; Mosquera-Corral, A.; del Rio, A.V.
Title Is the ammonia stripping pre-treatment suitable for the nitrogen removal via partial nitritation-anammox of OFMSW digestate? Type
Year 2021 Publication JOURNAL OF HAZARDOUS MATERIALS Abbreviated Journal J. Hazard. Mater.
Volume 403 Issue Pages 123458
Keywords Ammonia stripping; Anammox; COD/N ratio; Heterotrophic denitrification; OFMSW
Abstract Treating the organic fraction of municipal solid waste (OFMSW) can be performed by coupling the anaerobic digestion (AD) and partial nitritation-anammox (PN-AMX) processes for organic matter and nitrogen removal, respectively. Besides, an ammonia stripping (AS) step before the AD benefit the removal of organic matter. In the present study, the operation of two PN-AMX sequencing batch reactors with and without AS pre-treated OFMSW digestate (AS-SBR and nAS-SBR, respectively) was assessed. The specific anammox activity decreased by 90 % for increasing proportions of fed OFMSW in both cases, indicating no differences over the anammox activity whether the AS pre-treatment is implemented or not. For 100 % OFMSW proportion, the AS-SBR achieved better effluent quality than the nAS-SBR (127 +/- 88 vs. 1050 +/- 23 mg N/L) but with lower nitrogen removal rates (58 +/- 8 vs. 687 +/- 32 g N/(L.d)). Still, the latter required successive re-inoculations to obtain higher removal rates. Changes in the microbial communities were mainly correlated to sCOD/N ratios in the OFMSW, being Candidatus Brocadia the dominant anamnmox species. The results proved the AS to be a suitable pre-treatment, despite the higher sCOD/N ratios in the OFMSW digestate, achieving good synergy between the PN-AMX and heterotrophic denitrification processes.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0304-3894 ISBN Medium
Area Expedition Conference
Notes WOS:000595265500001 Approved
Call Number UAI @ alexi.delcanto @ Serial 1274
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Author Pichel, A.; Moreno, R.; Figueroa, M.; Campos, J.L.; Mendez, R.; Mosquera-Corral, A.; del Rio, A.V.
Title How to cope with NOB activity and pig manure inhibition in a partial nitritation-anammox process? Type
Year 2019 Publication Separation And Purification Technology Abbreviated Journal Sep. Purif. Technol.
Volume 212 Issue Pages 396-404
Keywords Anammox; Pig manure; Inhibition; Nitrite oxidizers (NOB); Dissolved oxygen control
Abstract The treatment of pig manure can be performed by anaerobic digestion to diminish the organic matter content and produce biogas, and the resulting digestate has to be subsequently treated for the removal of nitrogenous compounds. The partial nitritation-anammox (PN-AMX) process constitutes an interesting alternative. In the present study, three different short experiments were initially performed to study the influence of nitrite oxidizing bacteria (NOB) present in the inoculum and the pig manure composition over the start-up of the PN-AMX process. The presence of NOB in the inoculum showed to be more crucial than the available anammox activity for a good performance of the PN-AMX process. Batch activity experiments showed a reduction of at least 44.4% in the maximum specific anammox activity due to the pig manure, probably owed to its conductivity (between 6 and 8 mS/cm). In the subsequent long-term operation of the PN-AMX process with non-diluted pre-treated pig manure, the NOB were successfully limited for DO concentrations of 0.1 mg O-2/L, and a nitrogen removal rate (NRR) of 0.1 g N/(L.d) was achieved despite the presence of significant NOB activity in the start-up. A strict control of the DO concentration, with an optimal range of 0.07-0.10 mg O-2/L, was fundamental to balance the removal of nitrogen by PN-AMX and prevent NOB activity. The presence of organic matter, with a ratio sCOD/N in the influent between 0.18 and 1.14 g/g, did not hinder the PN-AMX process, and the contribution of heterotrophic denitrification to the removal of nitrogen was less than 10%.
Address [Pichel, Andres; Figueroa, Monica; Mendez, Ramon; Mosquera-Corral, Anuska; Val del Rio, Angeles] Univ Santiago de Compostela, Sch Engn, Dept Chem Engn, E-15705 Santiago De Compostela, Spain, Email: andres.gutierrez.pichel@usc.es
Corporate Author Thesis
Publisher Elsevier Science Bv Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1383-5866 ISBN Medium
Area Expedition Conference
Notes WOS:000457814700044 Approved
Call Number UAI @ eduardo.moreno @ Serial 1039
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