White-Rot Fungal Xylanases for Applications in Pulp and Paper Industry

This review introduce about biotechnological application of enzyme in pulp and paper industry. These enzymes can be applied as biological agents in biopulping, biobleaching including Hexenuronic acid (HexA) removal. Degrading enzyme from white rot fungi, xylanase, laccase, lipase and α-glucuronidase are the the most applicable enzyme in the process. Nowadays, enzyme application is still under laboratory scale, only a few is applied further until industrial scale. There are some limitations for further application related with technical aspects such as effectivity of the enzyme during its application comparing with chemical compounds, enzyme availability in the market, enzyme characteristic that appropriate with the process in pulp mill and economical aspect. In the other hand, these technologies also provide some advantages such as reduce energy consumption, reduce or substitute chemicals and more environmental friendly ABSTRAK Kajian ini berisi mengenai aplikasi bioteknologi terutama enzim di industri pulp dan kertas. Enzim ini dapat diaplikasikan pada proses pulping, biobleaching termasuk penghilangan Hexenuronic acid (HexA). Enzim dari jamur pelapuk putih, xilanase, lakase, lipase dan α-glucuronidase merupakan enzim yang penting untuk diaplikasikan pada proses-proses tersebut. Aplikasi enzim saat ini masih dalam skala laboratorium, hanya beberapa diterapkan lebih lanjut sampai skala industri. Beberapa keterbatasan untuk aplikasi lebih lanjut terkait dengan aspek teknis adalah efektivitas enzim yang lebih rendah jika dibandingkan dengan bahan kimia, keterbatasan produk enzim yang ada di pasar khususnya karakteristik enzim yang sesuai untuk industri pulp, dan keterbatasan dari aspek ekonomi. Namun di satu sisi, teknologi ini juga diketahui memiliki beberapa kelebihan seperti dapat mengurangi penggunaan energi, mengurangi atau substitusi bahan kimia, dan lebih ramah lingkungan

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Co-cooking nonwoods with hardwoods

TAPPI Journal ◽

10.32964/tj13.6.19 ◽

2014 ◽

Vol 13 (6) ◽

pp. 19-24

Author(s):

TROY RUNGE ◽

CHUNHUI ZHANG

Keyword(s):

High Performance Liquid Chromatography ◽

High Performance ◽

Paper Industry ◽

Pulp And Paper Industry ◽

Strength Properties ◽

Agricultural Residues ◽

Kraft Pulping ◽

Pulp And Paper ◽

Strength Increase ◽

Xylan Content

Agricultural residues and energy crops are promising resources that can be utilized in the pulp and paper industry. This study examines the potential of co-cooking nonwood materials with hardwoods as means to incorporate nonwood material into a paper furnish. Specifically, miscanthus, switchgrass, and corn stover were substituted for poplar hardwood chips in the amounts of 10 wt %, 20 wt %, and 30 wt %, and the blends were subjected to kraft pulping experiments. The pulps were then bleached with an OD(EP)D sequence and then refined and formed into handsheets to characterize their physical properties. Surprisingly, all three co-cooked pulps showed improved strength properties (up to 35%). Sugar measurement of the pulps by high-performance liquid chromatography suggested that the strength increase correlated with enriched xylan content.

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