Abstract:
:Recycling of office waste paper (photocopy, inkjet, and laser prints) is a major problem due to difficulty in removal of nonimpact ink. Biological deinking of office waste paper is reported using several microorganisms and their enzymes. We report here deinking and decolorization of the dislodged ink particles from inkjet printed paper pulp by a marine bacterium, Vibrio alginolyticus isolate no. NIO/DI/32, obtained from marine sediments. Decolorization of this pulp was achieved within 72 h by growing the bacterium in the pulp of 3-6% consistency suspended in seawater. Immobilized bacterial cells in sodium alginate beads were also able to decolorize this pulp within 72 h. The cell-free culture supernatant of the bacterium grown in nutrient broth was not effective in deinking. However, when the culture was grown in nutrient broth supplemented with starch or Tween 80, the cell-free culture supernatant could effectively deink and decolorize inkjet-printed paper pulp within 72 h at 30 degrees C. The culture supernatant of V. alginolyticus grown in the presence of starch or Tween 80 showed 49 U ml(-1) and 33 U ml(-1) amylase and lipase activities, respectively. Dialysis of these culture supernatants through 10 kDa cut-off membrane resulted in a 35-40% reduction in their efficiency in decolorizing the pulp. It appears that amylase and lipase effectively help in dislodging the ink particles from the inkjet printed-paper pulp. We hypothesize that the bacterium might be inducing the formation of low molecular weight free radicals in the culture medium, which might be responsible for decolorization of the pulp.
journal_name
J Ind Microbiol Biotechnoljournal_title
Journal of industrial microbiology & biotechnologyauthors
Mohandass C,Raghukumar Cdoi
10.1007/s10295-005-0017-8subject
Has Abstractpub_date
2005-09-01 00:00:00pages
424-9issue
9eissn
1367-5435issn
1476-5535journal_volume
32pub_type
杂志文章abstract::The present study deals with the production of citric acid from a ram horn peptone (RHP) by Aspergillus niger NRRL 330. A medium from RHP and a control medium (CM) were compared for citric acid production using A. niger in a batch culture. For this purpose, first, RHP was produced. Ram horns were hydrolyzed by treatme...
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journal_title:Journal of industrial microbiology & biotechnology
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journal_title:Journal of industrial microbiology & biotechnology
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journal_title:Journal of industrial microbiology & biotechnology
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journal_title:Journal of industrial microbiology & biotechnology
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journal_title:Journal of industrial microbiology & biotechnology
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journal_title:Journal of industrial microbiology & biotechnology
pub_type: 杂志文章
doi:10.1038/sj.jim.7000267
更新日期:2002-08-01 00:00:00
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journal_title:Journal of industrial microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s10295-008-0474-y
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journal_title:Journal of industrial microbiology & biotechnology
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doi:10.1007/s10295-008-0345-6
更新日期:2008-07-01 00:00:00
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journal_title:Journal of industrial microbiology & biotechnology
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doi:10.1007/s10295-008-0423-9
更新日期:2008-11-01 00:00:00
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journal_title:Journal of industrial microbiology & biotechnology
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journal_title:Journal of industrial microbiology & biotechnology
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journal_title:Journal of industrial microbiology & biotechnology
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journal_title:Journal of industrial microbiology & biotechnology
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