Added value for tissue makers created by efficient chlorine free microbe control program

Added value for tissue makers created by

efficient chlorine-free microbe control program Jaakko Ekman, Roberto Zulian, James Atkinson, Jordi Sanchez, Marko Kolari,

Amerigo Salvetti (LucartGroup) and Juha Rintala

Content

• Introduction to Performic Acid (PFA) technology

• Case story from Lucart PM 7 in Italy

• Experiences from other mill cases

• Conclusions

Jaakko Ekman & James Atkinson 2

Performic acid (PFA) chemistry

• Produced on-site from formic acid

and hydrogen peroxide

HCOOH + H2O2 → HCOOOH + H2O

• PFA product is never pure Performic

acid, it is always an equilibrium

solution containing Performic Acid,

Formic acid and Hydrogen Peroxide

• PFA has a short life-time, thus it can

not be stored or transported


PFA is a green disinfection agent with

very high performance


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Biocide dose, ppm active substance

Efficiency of Performic acid vs. Peracetic acid in Paper Mill Water

Peracetic acid

Performic acid

PFA advantages

• Fast acting and very efficient

• Kills microbes within a very short contact time, leaving formic acid and

water as intermittent residuals

Fully biodegradable to H2O and CO2

• Free of chlorine and bromine

• Less corrosive ions in the white water system

• No AOX released to environment

• Safer for process surfaces, workers and environment

• No toxic traces or dangerous disinfection by-products

• No corrosion


Case story: Lucart PM 7

• Located in Borgo a Mozzano, Toscana, Italy

• PM7 is a high speed (on average 1900 m/min) crescent former machine

producing premium bathroom tissue and wet strength grades

• Production: about 70 000 t/year, grammage 15 – 24 g/m2

• Raw material: 100 % virgin fiber

• Water usage: 5 to 8 m3/t

• PFA replaced organic biocide program at the beginning of July 2012

• Current program design

Continuously to fresh water;

Clarified water;

Wire pit

• In addition, organic biocide is used for sludge treatment


PFA equipment

Hydrogen Peroxide

FENNOSPEC 7810

FENNOSAN PFA

PREPARATION UNIT

INSTALLATION AT LUCART PM7

• Tailor made for accurate and safe dosing

• Automated and easy to use

Jaakko Ekman & James Atkinson

Lucart PM7 results (1)

Microbial level clearly lower than during previous treatment!


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Softwoodpulp

Hardwoodpulp

Whitewater

DAF Clarifiedwater

Pulperwater

Freshwater

AT

P (

RL

U)

Previoustreatment

Kemira I (13.7. -17.8.2012)

Kemira II (20.8. -4.9.2012)

Kemira III (6.9. -27.9.2012)

Kemira IV (2.10. -11.10.2012)

• Machine efficiency significantly improved, including a

new production record

• Felt life-time has increased 50 % (from 70 - 90 days to

180 days)

• PFA reacts less with other additives than previous biocide

program

• Program works effectively by treating waters only

• Competitive cost versus competition


Lucart PM7 results (2)

Experiences from other mill cases

Mill A:

• 60 – 70 % less breaks during PFA treatment than before

during Monochloramine (AmBr) treatment

• Visibly much cleaner machine

• Longer felt life: earlier 120 d, now more than 200 d

• Better retention, confirmed by lower consistency of white

water


Experiences from other mill cases

Mill B:

• Earlier with organic biocides, the mill had problems with

toxic traces in end product. After PFA treatment started, no

toxic end-product has been found

• Better working environment: Less bacteria in spray

waters, no biocide smells, no anaerobic bacteria because of

the higher redox level

• No corrosion problems during two years of PFA treatment

• Productivity has increased (also other factors involved)

• Better felt performance


Conclusions

PFA is a green sterilizing agent for tissue machines with

several benefits:

• Efficient microbe control → clean machine, excellent

runnability

• Safe program for both environment and operators

• Completely biodegradable → no toxic traces in end product

or waste water – No AOX generation

• Longer felt life → additional savings

• Not corrosive → less maintenance costs


Disclaimer:

Performic Acid (PFA) is currently not registered as a pesticide

in the USA or Canada and thus it is not available for sale in

either country. This presentation is for informational purposes

only and is not an offer for sale.


Added value for tissue makers created by efficient chlorine free microbe control program

Technology

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