CircleToZero_WaterReflection

CircleToZero* -TOWARDS ZERO EMISSIONS AND ZERO WASTE

CircleToZero is the global ANDRITZ initiative to achieve zero emissions and zero waste while creating sustainable financial growth for our customers. For pulp and paper customers it means eliminating unused industry side streams, turning them into new value-added products and achieving zero waste and zero emission production.

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© ANDRITZ
© ANDRITZ

Opportunities for elimination, reduction, and re-use in and outside the mill:

Gaseous side streams

CircleToZero opportunities 

Nitrogen oxides

NOx reduction technologies  

Sulfur dioxide 

SO2 removal technologies 

Odorous gases 

Odorous gas handling and treatment  

Carbon dioxide 

BioCO2 utilization with hydrogen to produce biomethanol 


Solid side streams 

CircleToZero opportunities 

Dregs and Grits 


Source of alkali 

Conversion into fertilizers by removing hazardous components 

Sludge 


Conversion into pellets 

New product development 

Ash and Gasifier bottom ash 


Purification and re-use outside the mill 

Gasifier bottom ash as new raw material 

Lime mud  


Purification and re-use 

Source of alkali 



Liquid side streams 

CircleToZero opportunities 

Filtrates 

New strategies to handle filtrates  

Recirculation of purified filtrates  

Reduced fresh water usage that is aiming towards Zero liquid discharge mill 

Raw methanol 

Purification and re-use in and outside the mill 

New revenue generation 

Condensates 

Re-use of condensates 

Fresh water usage reduction  

Sulfate rich streams 

Extraction of sulfate to reduce the fresh water usage  

Crude Sulfate turpentine

Purification and re-use outside the mill 

New revenue generation 


* Trademark of the ANDRITZ GROUP. For information regarding ownership and countries of registration, please visit www.andritz.com/trademarks


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Over recent times pulp mills have become much more than simply “tonnes per year” in terms of revenue. First came the added extra of energy and district heating, then extracts of tall oil and turpentine, now all sorts of areas for extra revenue are being identified at pulp mills. As a clear example – and with the help of ANDRITZ – Swedish market pulp giant, Södra, recently started up the world’s first biomethanol plant at its Mönsterås mill in Sweden.

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Circle To Zero – Towards Zero Emissions and Zero Waste at Pulp and Paper Mills

CircleToZero™ is a global ANDRITZ initiative with the goal of achieving zero emissions and zero waste at the same time as creating financial growth for customers. For pulp and paper producers, this means eliminating unused industry side streams, turning them into new value-added products and achieving zero emissions and zero waste production.

Read more
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  • CircleToZero - Towards Zero Emissions and Zero Waste at Pulp and Paper Mills PDF : 806 KB
  • Södra Moensteras

    Biomethanol - Forming a circular bioeconomy at pulp mills

    PDF : 1.1 MB
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    A-Recovery+ recovery solutions

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