toggle visibility Search & Display Options

Select All    Deselect All
 |   | 
Details
   print
  Records Links
Author Giustinianovich, E.A.; Campos, J.L.; Roeckel, M.D. pdf  doi
openurl 
  Title The presence of organic matter during autotrophic nitrogen removal: Problem or opportunity? Type Journal Article
  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 no  
  Call Number UAI @ eduardo.moreno @ Serial 827  
Permanent link to this record
 

 
Author del Rio, A.V.; Pichel, A.; Fernandez-Gonzalez, N.; Pedrouso, A.; Fra-Vazquez, A.; Morales, N.; Mendez, R.; Campos, J.L.; Mosquera-Corral, A. pdf  doi
openurl 
  Title Performance and microbial features of the partial nitritation-anammox process treating fish canning wastewater with variable salt concentrations Type Journal Article
  Year 2018 Publication Journal Of Environmental Management Abbreviated Journal J. Environ. Manage.  
  Volume 208 Issue Pages 112-121  
  Keywords Autotrophic; Denitrification; Fish canning; Granule; Nitrogen  
  Abstract The partial nitritation-anammox (PN-AMX) process applied to wastewaters with high NaCl concentration was studied until now using simulated media, without considering the effect of organic matter concentration and the shift in microbial populations. This research work presents results on the application of this process to the treatment of saline industrial wastewater. Obtained results indicated that the PN-AMX process has the capability to recover its initial activity after a sudden/acute salt inhibition event (up to 16 g NaCl/L). With a progressive salt concentration increase for 150 days, the PN-AMX process was able to remove the 80% of the nitrogen at 7-9 g NaCl/L. The microbiological data indicated that NaCl and ammonia concentrations and temperature are important factors shaping PN-AMX communities. Thus, the NOB abundance (Nitrospira) decreases with the increase of the salt concentration, while heterotrophic denitrifiers are able to outcompete anammox aftet a peak of organic matter in the feeding. (C) 2017 Elsevier Ltd. All rights reserved.  
  Address [Val del Rio, Angeles; Pichel, Andres; Fernandez-Gonzalez, Nuria; Pedrouso, Alba; Fra-Vazquez, Andrea; Mendez, Ramon; Mosquera-Corral, Anuska] Univ Santiago de Compostela, Sch Engn, Dept Chem Engn, E-15705 Santiago De Compostela, Spain, Email: mangeles.val@usc.es;  
  Corporate Author Thesis  
  Publisher Academic Press Ltd- 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 0301-4797 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000424074000011 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 818  
Permanent link to this record
 

 
Author Campos, J.L.; del Rio, A.V.; Pedrouso, A.; Raux, P.; Giustinianovich, E.A.; Mosquera-Corral, A. pdf  doi
openurl 
  Title Granular biomass floatation: A simple kinetic/stoichiometric explanation Type Journal Article
  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 no  
  Call Number UAI @ eduardo.moreno @ Serial 697  
Permanent link to this record
 

 
Author Read-Daily, B.L.; Sabba, F.; Pavissich, J.P.; Nerenberg, R. pdf  doi
openurl 
  Title Kinetics of nitrous oxide (N2O) formation and reduction by Paracoccus pantotrophus Type Journal Article
  Year 2016 Publication Amb Express Abbreviated Journal AMB Express  
  Volume 6 Issue Pages 7 pp  
  Keywords Paracoccus pantotrophus; Nitrous oxide; Denitrification; Maximum specific reduction rates; Kinetics  
  Abstract Nitrous oxide (N2O) is a powerful greenhouse gas emitted from wastewater treatment, as well as natural systems, as a result of biological nitrification and denitrification. While denitrifying bacteria can be a significant source of N2O, they can also reduce N2O to N-2. More information on the kinetics of N2O formation and reduction by denitrifying bacteria is needed to predict and quantify their impact on N2O emissions. In this study, kinetic parameters were determined for Paracoccus pantotrophus, a common denitrifying bacterium. Parameters included the maximum specific reduction rates, (q) over cap, growth rates, (mu) over cap, and yields, Y, for reduction of NO3- (nitrate) to nitrite (N2O-), N2O- to N2O, and N2O to N-2, with acetate as the electron donor. The (q) over cap values were 2.9 gN gCOD(-1) d(-1) for NNO3- to NO2-, 1.4 gN gCOD(-1) d(-1) for N2O-to N2O, and 5.3 gN gCOD(-1) d(-1) for N2O to N-2. The (mu) over cap values were 2.7, 0.93, and 1.5 d(-1), respectively. When N2O and NO3- were added concurrently, the apparent (extant) kinetics, (q) over cap (app), assuming reduction to N-2, were 6.3 gCOD gCOD(-1) d(-1), compared to 5.4 gCOD gCOD(-1) d(-1) for NO3- as the sole added acceptor. The (mu) over cap (app) was 1.6 d(-1), compared to 2.5 d(-1) for NO3- alone. These results suggest that NO3- and N2O were reduced concurrently. Based on this research, denitrifying bacteria like P. pantotrophus may serve as a significant sink for N2O. With careful design and operation, treatment plants can use denitrifying bacteria to minimize N2O emissions.  
  Address [Read-Daily, B. L.] Elizabethtown Coll, Dept Engn & Phys, Elizabethtown, PA 17022 USA, Email: rnerenbe@nd.edu  
  Corporate Author Thesis  
  Publisher Biomed Central Ltd Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2191-0855 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000384497400004 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 661  
Permanent link to this record
 

 
Author del Rio, A.V.; Buys, B.; Campos, J.L.; Mendez, R.; Mosquera-Corral, A. pdf  doi
openurl 
  Title Optimizing upflow velocity and calcium precipitation in denitrifying granular systems Type Journal Article
  Year 2015 Publication Process Biochemistry Abbreviated Journal Process Biochem.  
  Volume 50 Issue 10 Pages 1656-1661  
  Keywords Calcium; Denitrification; Granule; Upflow velocity  
  Abstract The denitrification process was studied in two granular biomass denitrifying reactors (USB1 and USB2). In USB1 large quantities of biomass were accumulated (9.5 gVSS L-1) allowing for the treatment of high nitrogen loads (3.5 g NO3--N L-1 d(-1)). As the biomass granulation process is not immediate the effects of different upflow velocities (0.12-5.5 m h(-1)) and calcium contents (5-200 mg Ca2+ L-1) were studied in order to speed up the process. Obtained results indicate that the optimum values for these parameters, which allow for the stable operation of USB1, are of 0.19 m h(-1) and 60 mg Ca2+ L-1. Then these optimum conditions were applied to USB2 where the effects of concentrations from 335 to 1000 mg NO3--N L-1 were tested. In these conditions nitrate concentrations of 1000 mg NO3--N L-1 are required for denitrifying granular biomass formation. Summarizing denitrifying granules can be formed at low upflow velocities and in hard or extremely hard water composition conditions if sufficient high nitrogen loads are treated. (C) 2015 Elsevier Ltd. All rights reserved.  
  Address [Val del Rio, A.; Buys, B.; Campos, J. L.; Mendez, R.; Mosquera-Corral, A.] Univ Santiago de Compostela, Inst Technol, Dept Chem Engn, Santiago De Compostela 15782, Galicia, Spain, Email: mangeles.val@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:000361775400022 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 526  
Permanent link to this record
Select All    Deselect All
 |   | 
Details
   print

Save Citations:
Export Records: