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Author del Rio, A.V.; Stachurski, A.; Mendez, R.; Campos, J.L.; Surmacz-Gorska, J.; Mosquera-Corral, A. pdf  doi
openurl 
  Title Short- and long-term orange dye effects on ammonium oxidizing and anammox bacteria activities Type Journal Article
  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 no  
  Call Number UAI @ eduardo.moreno @ Serial 748  
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Author Giustinianovich, E.A.; Campos, J.L.; Roeckel, M.D.; Estrada, A.J.; Mosquera-Corral, A.; del Rio, A.V. pdf  doi
openurl 
  Title Influence of biomass acclimation on the performance of a partial nitritation-anammox reactor treating industrial saline effluents Type Journal Article
  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 no  
  Call Number UAI @ eduardo.moreno @ Serial 817  
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Author Morales, N.; del Rio, A.V.; Vazquez-Padin, J.R.; Mendez, R.; Campos, J.L.; Mosquera-Corral, A. pdf  doi
openurl 
  Title The granular biomass properties and the acclimation period affect the partial nitritation/anammox process stability at a low temperature and ammonium concentration Type Journal Article
  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 no  
  Call Number UAI @ eduardo.moreno @ Serial 685  
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Author Pedrouso, A.; Aiartza, I.; Morales, N.; Vazquez-Padin, J.R.; Rogalla, F.; Campos, J.L.; Mosquera-Corral, A.; del Rio, A.V. pdf  doi
openurl 
  Title Pilot-scale ELAN (R) process applied to treat primary settled urban wastewater at low temperature via partial nitritation-anammox processes Type Journal Article
  Year 2018 Publication Separation And Purification Technology Abbreviated Journal Sep. Purif. Technol.  
  Volume 200 Issue Pages 94-101  
  Keywords Ananunox; Autotrophic nitrogen removal; Granular biomass; Mainstream; Partial nitritation  
  Abstract A single stage partial nitritation and anammox granular pilot scale reactor (600 L) was operated to treat primary settled sewage in an urban wastewater treatment plant. The fed wastewater contained low total nitrogen concentrations of 6-25 mg TN/L and the system operated without temperature control ranging from 18 to 12 degrees C. A control strategy, based on the pH value, was applied to stop the aeration supply. The pH set-point was fixed at 6.0 and allowed obtaining a total nitrogen removal efficiency approximately of 50% treating a load of 67 mg TN/(L.d) without the addition of any chemicals. Although nitrite oxidizing bacteria were present in the inoculated sludge, when the pH-based control was implemented (day 30) the ammonium oxidation was favored compared to the nitrite oxidation activity. Then, the system operated stable the rest of the operational period (days 30-94) despite the presence of organic matter in the wastewater and the high variability of nitrogen load and temperature during the operation. Nitrogen was autotrophically removed accomplishing the stringent discharge limits (10 mg TN/L) and nitrate concentrations in the effluent lower than 3 mg NO3--N/L. Both biomass concentration and granules size increased during the operational period indicating the growth of the biomass inside the reactor and therefore the potential treatment capacity.  
  Address [Pedrouso, Alba; Aiartza, Irati; Mosquera-Corral, Anuska; Val del Rio, Angeles] Univ Santiago de Compostela, Sch Engn, Dept Chem Engn, E-15705 Santiago De Compostela, Spain, Email: alba.pedrouso@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:000431157200012 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 855  
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Author Pedrouso, A.; del Rio, A.V.; Campos, J.L.; Mendez, R.; Mosquera-Corral, A. pdf  doi
openurl 
  Title Biomass aggregation influences NaN3 short-term effects on anammox bacteria activity Type Journal Article
  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 no  
  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.; Mendez, R.; Mosquera-Corral, A. pdf  doi
openurl 
  Title Nitrite oxidizing bacteria suppression based on in-situ free nitrous acid production at mainstream conditions Type Journal Article
  Year 2017 Publication Separation And Purification Technology Abbreviated Journal Sep. Purif. Technol.  
  Volume 186 Issue Pages 55-62  
  Keywords Ammonium oxidizing bacteria; Flocculent sludge; Free nitrous acid; Mainstream; Nitrite oxidizing bacteria; Partial nitritation  
  Abstract The application of autotrophic nitrogen removal processes in the main line of wastewater treatment plants will contribute to achieve its self-energy-sufficiency. However, the effective suppression of nitrite oxidizing bacteria (NOB) activity at the conditions of low temperature and low ammonium concentration (mainstream conditions) was identified as one of the main bottlenecks. In this study, stable partial nitritation at 16 degrees C and 50 mg NH4+-N/L was achieved maintaining inside the reactor free nitrous acid (FNA) concentrations inhibitory for NOB (>0.02 mg HNO2-N/L), without dissolved oxygen concentration control, The FNA inhibitory concentration was generated by the partial nitritation process, and its stimulation was studied with two different inhibitors: sodium azide and nitrite. The microbiological analysis revealed that, throughout the operational period with inhibitory FNA levels, the NOB populations (dominated by Nitrospira) were effectively washed out from the reactor. This is an advantage that allowed maintaining a good stability of the process, even when the FNA concentration was not enough to inhibit the NOB, taking about 40 days to develop significant activity. The observed delay on the NOB development is expected to enable the establishment of corrective actions to avoid the partial nitritation destabilization. The use of the FNA to achieve a stable partial nitritation process is recommended to profit from the natural pH decrease associated to the nitritation process and from its favoured accumulation at low temperatures as those from the mainstream. In this research study an analysis about the influence of ammonium and alkalinity concentrations was also performed to know in which scenarios the FNA inhibitory concentration can be achieved. (C) 2017 Elsevier B.V. All rights reserved.  
  Address [Pedrouso, Alba; del Rio, Angeles Val; Mendez, Ramon; Mosquera-Corral, Anuska] Univ Santiago de Compostela, Sch Engn, Dept Chem Engn, E-15705 Santiago De Compostela, Spain, Email: alba.pedrouso@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:000406730700007 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 755  
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. doi  openurl
  Title Digested blackwater treatment in a partial nitritation-anammox reactor under repeated starvation and reactivation periods Type Journal Article
  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 no  
  Call Number UAI @ eduardo.moreno @ Serial 1079  
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