Imagen de Portada

Nitrogen Transformation and Removal in Maturation Ponds: Tracer Experiments with 15N Stable Isotopes in The United Kingdom in Summer

The mechanisms and pathways by which nitrogen in its various forms is removed from waste stabilization ponds (WSP) have been a subject of much debate. In order to improve current understanding of the dynamics of inorganic and organic nitrogen removal in WSP systems, a study using stable nitrogen iso...

Descripción completa

Detalles Bibliográficos
Autor Principal: Camargo Valero, Miller Alonso; Mara, David Duncan
Formato: Artículo (Article)
Lenguaje:Desconocido (Unknown)
Publicado: 2007
Materias:
Isotopos estables de nitrogeno (15N); lagunas de maduracion; Remocion de nitrogeno; Transformacion de nitrogeno
Tecnología; Tecnología / Ingeniería y operaciones afines
Acceso en línea:http://babel.banrepcultural.org/cdm/ref/collection/p17054coll23/id/597
id ir-p17054coll23-597
recordtype dspace
spelling ir-p17054coll23-5972020-09-29 Nitrogen Transformation and Removal in Maturation Ponds: Tracer Experiments with 15N Stable Isotopes in The United Kingdom in Summer Camargo Valero, Miller Alonso; Mara, David Duncan The mechanisms and pathways by which nitrogen in its various forms is removed from waste stabilization ponds (WSP) have been a subject of much debate. In order to improve current understanding of the dynamics of inorganic and organic nitrogen removal in WSP systems, a study using stable nitrogen isotopes (15N) was undertaken on an experimental pilot-scale WSP system at Esholt Wastewater Treatment Works (Bradford, UK) in summer 2005 and 2006. A primary maturation pond was spiked with 15N-labelled ammonia (15NH4Cl) and 15N-labelled algae (Chlorella vulgaris) to track nitrogen transformations and removal associated with ammonia volatilization, nitrification, and algal uptake and its subsequent sedimentation and retention/hydrolysis in the sludge layer. Stable isotope analysis of 15N, in conjunction with performance indicators, revealed that total nitrogen is poorly removed (? 8%) but ammonium nitrogen removal is very good in summer (effluent concentration <2 mg NH4 + -N/L). The nitrogen cycle in maturation ponds is dominated by biological uptake as ammonium nitrogen is rapidly transformed into algal biomass as suspended organic nitrogen which then either leaves in the pond effluent or is sedimented as dead cells. Ammonia removal by volatilization makes little or no contribution to nitrogen removal and biological nitrate uptake prevents classical nitrification. Thus algal uptake of ammonium and subsequent sedimentation and retention in the sludge layer, after parti al ammonification of the algal organic nitrogen, appears to be the dominant mechanism for permanent nitrogen removal in maturation ponds during warm summer months in England. Isotopos estables de nitrogeno (15N); lagunas de maduracion; Remocion de nitrogeno; Transformacion de nitrogeno Tecnología; Tecnología / Ingeniería y operaciones afines 2007 PDF Artículo ENG - Inglés Inglaterra Colfuturo © Derechos reservados del autor http://babel.banrepcultural.org/cdm/ref/collection/p17054coll23/id/597
institution Biblioteca Virtual Banco de la República - Colecciones digitales
collection Custom
language Desconocido (Unknown)
topic Isotopos estables de nitrogeno (15N); lagunas de maduracion; Remocion de nitrogeno; Transformacion de nitrogeno
Tecnología; Tecnología / Ingeniería y operaciones afines
spellingShingle Isotopos estables de nitrogeno (15N); lagunas de maduracion; Remocion de nitrogeno; Transformacion de nitrogeno
Tecnología; Tecnología / Ingeniería y operaciones afines
Camargo Valero, Miller Alonso; Mara, David Duncan
Nitrogen Transformation and Removal in Maturation Ponds: Tracer Experiments with 15N Stable Isotopes in The United Kingdom in Summer
description The mechanisms and pathways by which nitrogen in its various forms is removed from waste stabilization ponds (WSP) have been a subject of much debate. In order to improve current understanding of the dynamics of inorganic and organic nitrogen removal in WSP systems, a study using stable nitrogen isotopes (15N) was undertaken on an experimental pilot-scale WSP system at Esholt Wastewater Treatment Works (Bradford, UK) in summer 2005 and 2006. A primary maturation pond was spiked with 15N-labelled ammonia (15NH4Cl) and 15N-labelled algae (Chlorella vulgaris) to track nitrogen transformations and removal associated with ammonia volatilization, nitrification, and algal uptake and its subsequent sedimentation and retention/hydrolysis in the sludge layer. Stable isotope analysis of 15N, in conjunction with performance indicators, revealed that total nitrogen is poorly removed (? 8%) but ammonium nitrogen removal is very good in summer (effluent concentration <2 mg NH4 + -N/L). The nitrogen cycle in maturation ponds is dominated by biological uptake as ammonium nitrogen is rapidly transformed into algal biomass as suspended organic nitrogen which then either leaves in the pond effluent or is sedimented as dead cells. Ammonia removal by volatilization makes little or no contribution to nitrogen removal and biological nitrate uptake prevents classical nitrification. Thus algal uptake of ammonium and subsequent sedimentation and retention in the sludge layer, after parti al ammonification of the algal organic nitrogen, appears to be the dominant mechanism for permanent nitrogen removal in maturation ponds during warm summer months in England.
format Artículo (Article)
author Camargo Valero, Miller Alonso; Mara, David Duncan
author_facet Camargo Valero, Miller Alonso; Mara, David Duncan
author_sort Camargo Valero, Miller Alonso; Mara, David Duncan
title Nitrogen Transformation and Removal in Maturation Ponds: Tracer Experiments with 15N Stable Isotopes in The United Kingdom in Summer
title_short Nitrogen Transformation and Removal in Maturation Ponds: Tracer Experiments with 15N Stable Isotopes in The United Kingdom in Summer
title_full Nitrogen Transformation and Removal in Maturation Ponds: Tracer Experiments with 15N Stable Isotopes in The United Kingdom in Summer
title_fullStr Nitrogen Transformation and Removal in Maturation Ponds: Tracer Experiments with 15N Stable Isotopes in The United Kingdom in Summer
title_full_unstemmed Nitrogen Transformation and Removal in Maturation Ponds: Tracer Experiments with 15N Stable Isotopes in The United Kingdom in Summer
title_sort nitrogen transformation and removal in maturation ponds: tracer experiments with 15n stable isotopes in the united kingdom in summer
publishDate 2007
url http://babel.banrepcultural.org/cdm/ref/collection/p17054coll23/id/597
_version_ 1682459995441987584
score 12,131701

Ejemplares similares