Resistance of diethylenetriaminepentaacetic acid to anaerobic biodegradation

Kraft mills are responsible for the massive discharge of highly polluted effluents, and new bleaching processes (i.e. Total Chlorine Free (TCF)) is presented as a feasible option to reduce this environmental impact. However, increased TCF pulp production is accompanied by an increase in chelate use....

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Autores principales:	Alarcón,Evelyn, Decap,Jacqueline, Vidal,Gladys
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso 2005
Materias:	anaerobic biodegradation DTPA kraft mill effluent
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582005000300011
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spelling	oai:scielo:S0717-345820050003000112006-01-26Resistance of diethylenetriaminepentaacetic acid to anaerobic biodegradationAlarcón,EvelynDecap,JacquelineVidal,Gladys anaerobic biodegradation DTPA kraft mill effluent Kraft mills are responsible for the massive discharge of highly polluted effluents, and new bleaching processes (i.e. Total Chlorine Free (TCF)) is presented as a feasible option to reduce this environmental impact. However, increased TCF pulp production is accompanied by an increase in chelate use. The most commonly used chelates, ethylenediaminetetraacetic acid (EDTA) and diethylenetriaminepentaacetic acid (DPTA), are considered to be relatively persistent substances in water treatment plants, and consequently environmentally critical compounds. The purpose of this work is to investigate DPTA behaviour in an anaerobic system. An Anaerobic Filter (AF) was operated with three different DPTA load rates (LR DPTA = 0.07 - 0.28 gDPTA/L×d), and the operating strategy was to maintain the anaerobic system stable during the entire operation (alkalinity ratio below 0.3). The AF's maximum Chemical Oxygen Demand (COD) removal was 59%, whereas the Biological Oxygen Demand (BOD5) was around 95%. However, only 5% of DPTA removal was observed under anaerobic conditions during the first operating period. Scanning electronic microscopy indicates that the operating system reduced microorganism biodiversityinfo:eu-repo/semantics/openAccessPontificia Universidad Católica de ValparaísoElectronic Journal of Biotechnology v.8 n.3 20052005-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582005000300011en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	anaerobic biodegradation DTPA kraft mill effluent
spellingShingle	anaerobic biodegradation DTPA kraft mill effluent Alarcón,Evelyn Decap,Jacqueline Vidal,Gladys Resistance of diethylenetriaminepentaacetic acid to anaerobic biodegradation
description	Kraft mills are responsible for the massive discharge of highly polluted effluents, and new bleaching processes (i.e. Total Chlorine Free (TCF)) is presented as a feasible option to reduce this environmental impact. However, increased TCF pulp production is accompanied by an increase in chelate use. The most commonly used chelates, ethylenediaminetetraacetic acid (EDTA) and diethylenetriaminepentaacetic acid (DPTA), are considered to be relatively persistent substances in water treatment plants, and consequently environmentally critical compounds. The purpose of this work is to investigate DPTA behaviour in an anaerobic system. An Anaerobic Filter (AF) was operated with three different DPTA load rates (LR DPTA = 0.07 - 0.28 gDPTA/L×d), and the operating strategy was to maintain the anaerobic system stable during the entire operation (alkalinity ratio below 0.3). The AF's maximum Chemical Oxygen Demand (COD) removal was 59%, whereas the Biological Oxygen Demand (BOD5) was around 95%. However, only 5% of DPTA removal was observed under anaerobic conditions during the first operating period. Scanning electronic microscopy indicates that the operating system reduced microorganism biodiversity
author	Alarcón,Evelyn Decap,Jacqueline Vidal,Gladys
author_facet	Alarcón,Evelyn Decap,Jacqueline Vidal,Gladys
author_sort	Alarcón,Evelyn
title	Resistance of diethylenetriaminepentaacetic acid to anaerobic biodegradation
title_short	Resistance of diethylenetriaminepentaacetic acid to anaerobic biodegradation
title_full	Resistance of diethylenetriaminepentaacetic acid to anaerobic biodegradation
title_fullStr	Resistance of diethylenetriaminepentaacetic acid to anaerobic biodegradation
title_full_unstemmed	Resistance of diethylenetriaminepentaacetic acid to anaerobic biodegradation
title_sort	resistance of diethylenetriaminepentaacetic acid to anaerobic biodegradation
publisher	Pontificia Universidad Católica de Valparaíso
publishDate	2005
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582005000300011
work_keys_str_mv	AT alarconevelyn resistanceofdiethylenetriaminepentaaceticacidtoanaerobicbiodegradation AT decapjacqueline resistanceofdiethylenetriaminepentaaceticacidtoanaerobicbiodegradation AT vidalgladys resistanceofdiethylenetriaminepentaaceticacidtoanaerobicbiodegradation
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Resistance of diethylenetriaminepentaacetic acid to anaerobic biodegradation

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