Electronic Resource
Nitrite oxidizing bacteria suppression based on in-situ free nitrous acid production at mainstream conditions
| العنوان: | Nitrite oxidizing bacteria suppression based on in-situ free nitrous acid production at mainstream conditions |
|---|---|
| المؤلفون: | Universidade de Santiago de Compostela. Departamento de Enxeñaría Química, Pedrouso Fuentes, Alba, Val del Río, María Ángeles, Morales Pereira, Nicolás, Vázquez Padín, José Ramón, Campos Gómez, José Luis, Méndez Pampín, Ramón José, Mosquera Corral, Anuska |
| بيانات النشر: | Elsevier 2017-05-26 |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | 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 °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 |
| مصطلحات الفهرس: | Ammonium oxidizing bacteria, Flocculent sludge, Free nitrous acid, Mainstream, Nitrite oxidizing bacteria, Partial nitritation, journal article |
| URL: | info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2014-55021-R/ES/SISTEMA SOSTENIBLE PARA LA VALORIZACION DE AGUAS RESIDUALES DE CONSERVERA DE PESCADO A TRAVES DE LA PRODUCCION DE BIOPOLIMEROS info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2014-55397-JIN/ES/DESARROLLO DE SISTEMAS SOSTENIBLES BASADOS EN BIOMASA GRANULAR PARA EL TRATAMIENTO DE AGUAS RESIDUALES PROCEDENTES DE LA INDUSTRIA DE PRODUCTOS DEL MAR |
| الاتاحة: | Open access content. Open access content open access © 2017 Elsevier B.V. |
| ملاحظة: | English |
| Other Numbers: | ESUSC oai:minerva.usc.es:10347/15643 Pedrouso A., Val del Río Á., Morales N., Vázquez-Padín J. R., Campos J. L., Méndez R. and Mosquera-Corral A. (2017). Nitrite oxidizing bacteria suppression based on in-situ free nitrous acid production at mainstream conditions. Separation and Purification Technology 186, 55-62 1383-5866 10.1016/j.seppur.2017.05.043 1401002507 |
| المصدر المساهم: | UNIVERSIDADE DE SANTIAGO DE COMPOSTELA From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.on1401002507 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |