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Nitrogen removal from wastewater through microbial electrolysis cells and cation exchange membrane

Vulnerability of water resources to nutrients led to progressively stricter standards for wastewater effluents. Modification of the conventional procedures to meet the new standards is inevitable. New technologies should give a priority to nitrogen removal. In this paper, ammonium chloride and urine...

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Autores principales: Haddadi, Sakineh, Nabi-Bidhendi, GholamReza, Mehrdadi, Nasser
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3996092/
https://www.ncbi.nlm.nih.gov/pubmed/24533446
http://dx.doi.org/10.1186/2052-336X-12-48
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author Haddadi, Sakineh
Nabi-Bidhendi, GholamReza
Mehrdadi, Nasser
author_facet Haddadi, Sakineh
Nabi-Bidhendi, GholamReza
Mehrdadi, Nasser
author_sort Haddadi, Sakineh
collection PubMed
description Vulnerability of water resources to nutrients led to progressively stricter standards for wastewater effluents. Modification of the conventional procedures to meet the new standards is inevitable. New technologies should give a priority to nitrogen removal. In this paper, ammonium chloride and urine as nitrogen sources were used to investigate the capacity of a microbial electrolysis cell (MEC) configured by cation exchange membrane (CEM) for electrochemical removal of nitrogen over open-and closed-circuit potentials (OCP and CCP) during biodegradation of organic matter. Results obtained from this study indicated that CEM was permeable to both organic and ammonium nitrogen over OCP. Power substantially mediated ammonium migration from anodic wastewater to the cathode, as well. With a urine rich wastewater in the anode, the maximum rate of ammonium intake into the cathode varied from 34.2 to 40.6 mg/L.h over CCP compared to 10.5-14.9 mg/L.h over OCP. Ammonium separation over CCP was directly related to current. For 1.46-2.12 mmol electron produced, 20.5-29.7 mg-N ammonium was removed. Current also increased cathodic pH up to 12, a desirable pH for changing ammonium ion to ammonia gas. Results emphasized the potential for MEC in control of ammonium through ammonium separation and ammonia volatilization provided that membrane characteristic is considered in their development.
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spelling pubmed-39960922014-05-07 Nitrogen removal from wastewater through microbial electrolysis cells and cation exchange membrane Haddadi, Sakineh Nabi-Bidhendi, GholamReza Mehrdadi, Nasser J Environ Health Sci Eng Research Article Vulnerability of water resources to nutrients led to progressively stricter standards for wastewater effluents. Modification of the conventional procedures to meet the new standards is inevitable. New technologies should give a priority to nitrogen removal. In this paper, ammonium chloride and urine as nitrogen sources were used to investigate the capacity of a microbial electrolysis cell (MEC) configured by cation exchange membrane (CEM) for electrochemical removal of nitrogen over open-and closed-circuit potentials (OCP and CCP) during biodegradation of organic matter. Results obtained from this study indicated that CEM was permeable to both organic and ammonium nitrogen over OCP. Power substantially mediated ammonium migration from anodic wastewater to the cathode, as well. With a urine rich wastewater in the anode, the maximum rate of ammonium intake into the cathode varied from 34.2 to 40.6 mg/L.h over CCP compared to 10.5-14.9 mg/L.h over OCP. Ammonium separation over CCP was directly related to current. For 1.46-2.12 mmol electron produced, 20.5-29.7 mg-N ammonium was removed. Current also increased cathodic pH up to 12, a desirable pH for changing ammonium ion to ammonia gas. Results emphasized the potential for MEC in control of ammonium through ammonium separation and ammonia volatilization provided that membrane characteristic is considered in their development. BioMed Central 2014-02-17 /pmc/articles/PMC3996092/ /pubmed/24533446 http://dx.doi.org/10.1186/2052-336X-12-48 Text en Copyright © 2014 Haddadi et al.; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.
spellingShingle Research Article
Haddadi, Sakineh
Nabi-Bidhendi, GholamReza
Mehrdadi, Nasser
Nitrogen removal from wastewater through microbial electrolysis cells and cation exchange membrane
title Nitrogen removal from wastewater through microbial electrolysis cells and cation exchange membrane
title_full Nitrogen removal from wastewater through microbial electrolysis cells and cation exchange membrane
title_fullStr Nitrogen removal from wastewater through microbial electrolysis cells and cation exchange membrane
title_full_unstemmed Nitrogen removal from wastewater through microbial electrolysis cells and cation exchange membrane
title_short Nitrogen removal from wastewater through microbial electrolysis cells and cation exchange membrane
title_sort nitrogen removal from wastewater through microbial electrolysis cells and cation exchange membrane
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3996092/
https://www.ncbi.nlm.nih.gov/pubmed/24533446
http://dx.doi.org/10.1186/2052-336X-12-48
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AT mehrdadinasser nitrogenremovalfromwastewaterthroughmicrobialelectrolysiscellsandcationexchangemembrane