Solutions for Pulp and Paper industry

Primary refining

MetGen offers energy saving solutions for chip refining, allowing up to 20% decrease in energy consumption or increased production rate and pulp quality.

Reject refining

Enzymatic treatment of reject with MetGen solutions can bring up three major improvements for the process. Energy consumption in reject refining, improved pulp bleachability, and reduced amount of wood extracts in the system. Each MetGen solution will be tailored for customer needs accordingly.

Pitch control

MetGen solutions have been developed for use in mill operations. MetZyme® has proven its ability to reduce pitch deposits significantly on rollers and other equipment. It breaks down triglycerides and other wood resin same time oxidizing them to hydrophilic and soluble form in the pulp. Similar way as fungal and bacterial growth reduces the pitch content of the wood during conventional seasoning. However, unlike seasoning, where the wood is stored for a long time, the enzyme acts immediately and does not reduce brightness or yield.

Pulp bleaching

Chlorine and derivatives of chlorine have been the cheapest and most versatile bleaching agents available for the bleaching of chemical pulps. This class of compounds has the disadvantage of forming chlorinated organic substances (some of which are toxic) during bleaching. The pulp and paper industry is under growing pressure from authorities, consumers and environmental groups to reduce the use of chlorine-­based bleaching chemicals and the discharge of chlorinated organic compounds.

New Metgen bleaching solutions consist totally new group of enzymes, Oxidoreductases are the best candidates for more environment-friendly pulp bleaching processes. By combining the latest enzyme innovations with traditional Xylanases it is possible to substantially reduce bleaching chemicals and therefore provide the pulp industry new cost-effective and “bio-friendly” solutions.

Chemical pulp deposit control

Enzymes being highly selective can have an impact on hydrophobic substances released on chemical pulping.

Chemical pulp refining aid

MetGen’s solution is based on the selective action of an Endocellulase which can improve individual fibre characteristics, for example in producing a softer tissue product and improved energy efficiency.

Enzymatic Deinking

MetGen Solutions allows recycle paper make brighter paper at neutral process condition, reducing effluent load and increasing productivity. Deinking of waste paper is an area with large potential for enzymes. This technology appears to be well-suited for mixed office waste (MOW). The current deinking methods mostly involve deinking in an alkaline environment. Moving to a neutral deinking system which can employ neutral/alkaline enzyme classes requires some change in the chemistry of the system, but can result in improvements in both the process and the final product. This can include improved pulp cleanliness, improved operation of the grey-water loops, less deposit potential and a brighter final pulp.

DIP strength improvement

Fibrillating enzymes work on the fiber surface to induce fibrillation and improves the strength of paper by increasing fiber contact and bonding. Preparing the fiber increasingly susceptible to refiner blade action, reduces the need of conventional refining and large decrease in pulp freeness can be produced at light refining action by blades. On the other hand, Fine Hydrolysing enzymes are suitable for reducing fines in slow moving stock, resulting in better machine speed and better drying, without compromising properties.

With MetGen solution is also possible to craft recycled fibers surface in order to enhance fiber-fiber bonding and therefore bring more strength potential for deinked pulps.

Please, find our pulp and paper enzymes for deinked pulp applications under the tradename MetZyme® BRILA™

In the manufacture of coated papers, a starch-based coating formulation is used to coat the surface of the paper. The coating provides improved gloss, smoothness and printing properties compared to the uncoated product. Raw starch is unsuitable for this application, since the flow properties would be unsuitable. In one case, chemically modified starch with a much lower solution viscosity is used. As an economical alternative to modifying the starch with aggressive oxidizing agents, the starch can be treated with enzymes (alpha-amylases) to obtain the same viscosity reduction.

MetGen offer pulp and paper enzymes also for this application under the tradename MetZyme® SEKALO™