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The role of cyanobacteria in pulp an...

Kirkwood, Andrea Elizabeth.

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The role of cyanobacteria in pulp and paper waste-treatment systems.

Record Type:	Electronic resources : Monograph/item
Title/Author:	The role of cyanobacteria in pulp and paper waste-treatment systems./
Author:	Kirkwood, Andrea Elizabeth.
Description:	120 p.
Notes:	Source: Dissertation Abstracts International, Volume: 64-04, Section: B, page: 1609.
Contained By:	Dissertation Abstracts International64-04B.
Subject:	Biology, Microbiology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NQ78025
ISBN:	0612780252

The role of cyanobacteria in pulp and paper waste-treatment systems.
Kirkwood, Andrea Elizabeth.

The role of cyanobacteria in pulp and paper waste-treatment systems. - 120 p.

Source: Dissertation Abstracts International, Volume: 64-04, Section: B, page: 1609.

Thesis (Ph.D.)--University of Toronto (Canada), 2003.

This study investigated the role of cyanobacteria in pulp and paper secondary waste-treatment systems, focusing on community and physiological characteristics as well as impacts to waste-treatment efficiency. I found cyanobacteria to be important members of the microbial community in geographically dispersed aerated stabilization basin (ASB) and activated sludge (AS) systems. Similar cyanobacterial taxa tended to dominate these communities and in some cases, biomass was equal to or greater than bacterial biomass. Although pulp and paper waste-treatment systems were severely light-limited, shade-adapted cyanobacterial communities were found to fix appreciable amounts of inorganic carbon via photosynthesis. All cyanobacterial species isolated from pulp and paper waste-treatment systems could take up glucose in the light and dark, and a number of representative taxa could grow mixotrophically. None of the cyanobacterial isolates were capable of mineralizing appreciable amounts of pulp and paper contaminants. Further studies using whole effluent from three mills showed that the softwood-based wastewaters had decreased removal of toxicity with increased cyanobacterial biomass. In contrast, the hardwood-based wastewater had increased removal of toxicity when cyanobacterial biomass increased. Cyanobacteria and their extracellular organic compounds (EOC) were shown to inhibit or stimulate bacterial degradation of organic contaminants (phenol and dichloroacetate), depending on the cyanobacterial and bacterial species. These variable impacts of cyanobacteria on toxicity removal and biodegradation efficiency suggest a complex, but important role during the biological treatment of pulp and paper wastewater.

ISBN: 0612780252Subjects--Topical Terms:

1017734
Biology, Microbiology.

The role of cyanobacteria in pulp and paper waste-treatment systems.
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020 $a 0612780252
035 $a (UnM)AAINQ78025
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100 1 $a Kirkwood, Andrea Elizabeth. $3 1947519
245 1 0 $a The role of cyanobacteria in pulp and paper waste-treatment systems.
300 $a 120 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-04, Section: B, page: 1609.
500 $a Advisers: Roberta Fulthorpe; Czesia Nalewajko.
502 $a Thesis (Ph.D.)--University of Toronto (Canada), 2003.
520 $a This study investigated the role of cyanobacteria in pulp and paper secondary waste-treatment systems, focusing on community and physiological characteristics as well as impacts to waste-treatment efficiency. I found cyanobacteria to be important members of the microbial community in geographically dispersed aerated stabilization basin (ASB) and activated sludge (AS) systems. Similar cyanobacterial taxa tended to dominate these communities and in some cases, biomass was equal to or greater than bacterial biomass. Although pulp and paper waste-treatment systems were severely light-limited, shade-adapted cyanobacterial communities were found to fix appreciable amounts of inorganic carbon via photosynthesis. All cyanobacterial species isolated from pulp and paper waste-treatment systems could take up glucose in the light and dark, and a number of representative taxa could grow mixotrophically. None of the cyanobacterial isolates were capable of mineralizing appreciable amounts of pulp and paper contaminants. Further studies using whole effluent from three mills showed that the softwood-based wastewaters had decreased removal of toxicity with increased cyanobacterial biomass. In contrast, the hardwood-based wastewater had increased removal of toxicity when cyanobacterial biomass increased. Cyanobacteria and their extracellular organic compounds (EOC) were shown to inhibit or stimulate bacterial degradation of organic contaminants (phenol and dichloroacetate), depending on the cyanobacterial and bacterial species. These variable impacts of cyanobacteria on toxicity removal and biodegradation efficiency suggest a complex, but important role during the biological treatment of pulp and paper wastewater.
590 $a School code: 0779.
650 4 $a Biology, Microbiology. $3 1017734
650 4 $a Engineering, Sanitary and Municipal. $3 1018731
650 4 $a Environmental Sciences. $3 676987
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690 $a 0554
690 $a 0768
710 2 0 $a University of Toronto (Canada). $3 1017674
773 0 $t Dissertation Abstracts International $g 64-04B.
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790 1 0 $a Nalewajko, Czesia, $e advisor
790 $a 0779
791 $a Ph.D.
792 $a 2003
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