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Your search keyword '"recycled pulp"' showing total 4 results
Start Over Descriptor "recycled pulp" Database Supplemental Index
4 results on '"recycled pulp"'

1. Selective hydrolysis of amorphous cellulosic fines for improvement in drainage of recycled pulp based on ratios of cellulase components.

Author

Verma, Piyush K., Bhardwaj, Nishi K., and Singh, Surendra P.

Subjects
HYDROLYSIS, AMORPHOUS substances, CELLULOSE, DRAINAGE, WASTE recycling
Abstract

Recycled pulp contains large amount of fines having high surface area and amorphous cellulose. These fines adsorb water to large extent and dewatering rate is lower compared to virgin pulp. Selective hydrolysis of these excess ultra fines through cellulase enzymes can be utilized for enhancing the drainage rate. The concept of monocomponent cellulase treatment of recycled pulp for improvement in drainage and the understanding whether effectiveness depends on a specific type of cellulase component (endoglucanase/cellobiohydrolase) is described. The improvement of ∼15–23% in pulp drainability was achieved along with better paper properties. [ABSTRACT FROM AUTHOR]

Published
2015
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2. Production of Multi-Fiber Modifying Enzyme from Mamillisphaeria sp. for Refining of Recycled Paper Pulp.

Author

Laothanachareon, Thanaporn, Khonzue, Parichart, Rattanaphan, Nakul, Tinnasulanon, Phungjai, Apawasin, Saowanee, Paemanee, Atchara, Ruanglek, Vasimon, Tanapongpipat, Sutipa, Champreda, Verawat, and Eurwilaichitr, Lily

Subjects
CELLULASE, XYLANASES, PULPING, PAPER pulp, RESPONSE surfaces (Statistics), PAPER industry
Abstract

The article presents a study regarding the production of a multi-fiber modifying enzyme from Mamillisphaeria sp. BCC8893. It mentions that the Mamillisphaeria sp. BCC8893 was optimized in submerged fermentation using a response-surface methodology. Result reveals the characteristics of the complex multi-fiber modifying enzyme utilized in refining and suggests its potential for local on-site enzyme production for the development an environmentally refining process in the pulp industry.

Published
2011
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3. Effect of different types of fines on the properties of recycled chemical pulp.

Author

Lee, Hyoung, Nam, Won-Seok, Sohn, Sang-Don, and Paik, Ki-Hyon

Subjects
PULPING, WOOD-pulp, RECYCLED products, STRENGTH of materials, HARDWOODS, LIGHT scattering, OPTICAL properties
Abstract

Abstract: The effect of fine content and quality on the recycled chemical pulps was studied. As fine content increased, the apparent sheet density linearly increased. The effect of fines from DIP (deinked pulp) on the apparent density of the sheets was the most prominent especially with the secondary fines. The addition of secondary fines obtained from HW-BKP (hardwood-bleached kraft pulp) and DIP, and primary fines from DIP increased the tensile strength but decreased the light scattering coefficient after a critical point. The improvement of strength by secondary fines was caused by the different quality of fines, relatively larger specific area and higher WRVs (water retention values). While the primary fines of HW-BKP increased the light scattering coefficient but had little effects on the tensile strength. Porosity was rapidly decreased with the addition of secondary fines more than 30% regardless types of pulps. [Copyright &y& Elsevier]

Published
2011
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4. Deinking of recycled pulps using column flotation: energy and environmental benefits

Author

Chaiarrekij, S., Dhingra, H., and Ramarao, B. V.

Subjects
ENERGY consumption, INDUSTRIES, PAPER industry
Abstract

Deinking of recycled pulps is an important operation intended to provide pulps appropriate for making paper and paperboard products from recycled wastepaper. Conventionally, deinking of recycled pulp is conducted in a flotation cell equipped with an agitator. We have investigated the applicability of a new flotation cell based on a column without an agitator present to accomplish the deinking of typical wastepaper feedstocks and also a feedstock consisting of rejects from a conventional deinking cell. Experimental results on the deinking operation indicate that it is possible to achieve deinking of a mixture of photocopier and laserprinted paper in the column flotation cell. The performance of the column, as measured by the resultant pulp's brightness and ink particle size distributions, is comparable to that of a conventional laboratory cell which incorporates severe agitation regimens. Thus, it is found that the agitator can be eliminated by using the column flotation design which could yield significant electrical energy savings in addition to savings in capital costs and other operational and maintenance costs. A series of deinking experiments were also performed on a feedstock consisting of rejected waste obtained from a conventional cell in a pilot plant. We found that deinking of the rejected waste could yield significant usable fiber. This indicatesthe potential of the column flotation technique in enhancing the reuse of a waste component thus reducing the volume of deinking waste rejected into the environment. [ABSTRACT FROM AUTHOR]

Published
2000
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