Biological deinking of inkjet-printed paper using Vibrio alginolyticus and its enzymes
IR@NIO: CSIR-National Institute Of Oceanography, Goa
View Archive Info| Field | Value | |
| Creator |
Mohandass, C.
Raghukumar, C. |
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| Date |
2006-06-28T11:43:39Z
2006-06-28T11:43:39Z 2005 |
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| Identifier |
J. Ind. Microbiol. Biotechnol., vol. 32(9), 424-429p.
http://drs.nio.org/drs/handle/2264/170 |
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| Description |
Recycling of office waste paper (photocopy, inkjet and laser prints) is a major problem due to difficulty in removal of non-impact 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 # 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 sea water. Immobilized bacterial cells in sodium alginate beads also were 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 inkjetprinted paper pulp within 72 h at 30oC. The culture supernatant of V. alginolyticus grown in the presence of starch or Tween 80 showed 49 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 formation of low molecular weight free radicals in the culture medium, which might be responsible for decolorization of the pulp.
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201187 bytes
application/pdf |
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| Language |
en
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| Publisher |
Society for Industrial Microbiology
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| Rights |
An edited version of this paper was published by Society for Industrial Microbiology 2005.
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| Subject |
marine bacterium
non-impact ink free radicals inkjet prints |
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| Title |
Biological deinking of inkjet-printed paper using Vibrio alginolyticus and its enzymes
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| Type |
Article
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