Production of a Trichoderma reesei QM9414 xylanase in Pichia pastoris and its application in biobleaching of wheat straw pulp

In this paper, the effect of microwave treatment on the hydrogen peroxide bleaching of Soda-AQ wheat-straw pulp was investigated. The results showed that microwave treatment could increase the brightness of the hydrogen peroxide bleached pulp. The fiber coarseness of microwave enhancing peroxide bleached pulp was higher than that of the peroxide bleached pulp. However, the arithmetic average fiber length, the length weighted average fiber length and weight weighted average fiber length of the former was lower than that of the latter. Fourier transform infra-red spectroscopy (FTIR) and X-ray diffraction (XRD) spectra showed that CrI(%) crystallinity of microwave enhancing peroxide bleached pulp was similar as that of the peroxide bleached pulp but all higher than that of the Soda-AQ wheat-straw pulp. N·O′KI infra-red crystalline index of microwave enhancing peroxide bleached pulp were lower than that of the peroxide bleached pulp. The FTIR spectra of lignin showed that the microwave treatment had some influences on the methoxyl and phenolic group in lignin.

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Heterologous expression of codon optimized Trichoderma reesei Cel6A in Pichia pastoris

Enzyme and Microbial Technology ◽

10.1016/j.enzmictec.2016.07.004 ◽

2016 ◽

Vol 92 ◽

pp. 107-116 ◽

Cited By ~ 10

Author(s):

Fubao Fuelbiol Sun ◽

Renhui Bai ◽

Huimin Yang ◽

Fei Wang ◽

Jing He ◽

...

Keyword(s):

Pichia Pastoris ◽

Heterologous Expression ◽

Trichoderma Reesei

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Xylanase and laccase aided bio-bleaching of wheat straw pulp

The Canadian Journal of Chemical Engineering ◽

10.1002/cjce.21798 ◽

2013 ◽

Vol 92 (1) ◽

pp. 131-138 ◽

Cited By ~ 11

Author(s):

Bhavin S. Dedhia ◽

Mangesh D. Vetal ◽

Virendra K. Rathod ◽

Csoka Levente

Keyword(s):

Wheat Straw ◽

Wheat Straw Pulp

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Study of Selecting Proper Chitosan from Various Chitosan Sample as Paper Strengthening Agent

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.117-119.1421 ◽

2011 ◽

Vol 117-119 ◽

pp. 1421-1424

Author(s):

Yong Sheng Ma ◽

Xian Hui Sun

Keyword(s):

Wheat Straw ◽

Strengthening Effect ◽

Chitosan Sample ◽

Viscosity Range ◽

Wheat Straw Pulp

It is usually reported that chitosan is used as paper strengthening agent. However, it is sorry that the study choosing chitosan which DD (degree of de-acetyl )and viscosity is filtered by experiments is blank. Many chitosan samples of wide viscosity range and wide DD range were tested by their strengthening effect on bleched wheat straw pulp. Then a few sample of chitosan is selected because of their obvious strengthening effect on pulp. This study could be as the foundation of further research of chitosan used as paper strengthening agent.

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Preparation and Properties of Multi-Layer Composite Paperboard

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.774-776.1010 ◽

2013 ◽

Vol 774-776 ◽

pp. 1010-1013

Author(s):

Quan Xiao Liu ◽

Dan Xi Li ◽

Fei Ma ◽

Chang Qing Chen ◽

Jun Yang

Keyword(s):

Wheat Straw ◽

Raw Materials ◽

Pulp Fiber ◽

Paper Pulp ◽

Mechanical Pulp ◽

Physical Strength ◽

Chemical Pulp ◽

Layer Composite ◽

Wheat Straw Pulp ◽

The Cost

In order to study the preparation and property of the multi layer composite paperboard, bleached wheat straw pulp, bleached chemical thermal mechanical pulp and waste newsprint pulp are used as raw materials to making paperboard. The results show that the bonding force between fibers of grasses chemical pulp is strong which can improve the bonding strength between the layers. Bleached wheat straw pulp is used as outer layer and waste news paper pulp is used as inner layer to make composite paperboard has high physical properties. Bleached chemical thermal mechanical pulp fiber is shorter, so paperboard tightness and physical strength reduce, which can be used as the lining of the multi layer composite paperboard to improve the stiffness of the paperboard and reduce the cost.

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