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Partial purification of bacterial cellulo-xylanolytic enzymes and their application in deinking of photocopier waste paper
- Source :
- Environmental Science and Pollution Research. 28:61317-61328
- Publication Year :
- 2021
- Publisher :
- Springer Science and Business Media LLC, 2021.
-
Abstract
- The potential of alkaline cellulo-xylanolytic enzymes from non-pathogenic Bacillus subtilis strain was tested for deinking of photocopier waste paper. Cellulase and xylanase play a crucial role in deinking of different types of waste paper. Partial purification of cellulo-xylanolytic enzymes was carried out using ultrafiltration followed by ammonium sulfate precipitation. The ultrafiltered enzyme was used for deinking the photocopier waste paper along with chemical deinking. An enzyme dose of 0.6 IU/g and reaction time of 60 min for ultrafiltered cellulo-xylanolytic enzyme significantly increased deinking efficiency, tear index (9.52%) and folding endurance (5±2%) as compared to chemical deinking. There was improvement in strength properties such as tear index and double-fold along with freeness of pulp (18%). There was slight decrease in tensile index (0.6%) and burst index (16%) while ISO brightness remained unaffected. Enzymatic deinking (74.3%) by ultrafiltered cellulo-xylanolytic from Bacillus subtilis was found significant over conventional chemical deinking.
- Subjects :
- Paper
Health, Toxicology and Mutagenesis
Ultrafiltration
Cellulase
010501 environmental sciences
engineering.material
01 natural sciences
law.invention
law
Environmental Chemistry
Ammonium sulfate precipitation
0105 earth and related environmental sciences
Endo-1,4-beta Xylanases
biology
Chemistry
Pulp (paper)
General Medicine
Pulp and paper industry
Deinking
Pollution
Enzyme assay
Folding endurance
biology.protein
Xylanase
engineering
Ink
Subjects
Details
- ISSN :
- 16147499 and 09441344
- Volume :
- 28
- Database :
- OpenAIRE
- Journal :
- Environmental Science and Pollution Research
- Accession number :
- edsair.doi.dedup.....5a8823dd5e0462d37dc0577d026a8056