HamburgHamburg

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SCHILL + SEILACHER SCHILL + SEILACHER „„STRUKTOLSTRUKTOL““ AGAG

Lars Herwägehr 23.04.2007

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Company Presentation

•Schill + Seilacher was founded 1877 in Heilbronn, Germany

by Karl Schill and Christoph Seilacher

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Company Presentation

Today Schill + Seilacher is still privately owned and independent.

From a small plant for leather chemicals our company has grown to the globally acting Schill + Seilacher Group with

•4 plants in Europe and the United States

•600 employees

•company sales and coordination offices e.g.

Argentina

China

Canada

Russia

Singapore

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Company Presentation

Plant: Stow, Ohio

Plant: Hamburg, Germany

Plant: Böblingen, GermanyPlant: Pirna, Germany

Sales Office: Moscow, Russia

Coordination Office: Singapore

Sales Office: Toronto, Canada

Sales Office: Buenos Aires, Argentina

Coordination Office: Beijing, China

Production

Sales Office

Coordination Office

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Company Presentation

SCHILL + SEILACHER SCHILL + SEILACHER „„STRUKTOLSTRUKTOL““ AG, HamburgAG, Hamburg

Additives for Rubber, Release Agents, TPE, Thermoplastics, Latex, Antifoams, Silicone Sealants

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Company Presentation

•Sales Volume: 10.000 tons

•Global Activities: in 70 countries

•Distribution Partners: in 56 countries

•Technical Support: 5 technicians

Schill + Seilacher Schill + Seilacher „„StruktolStruktol““ AG, HamburgAG, Hamburg

AnfifoamAnfifoam DepartmentDepartment

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What are defoamers / antifoams ?

Defoamers / antifoams are surface active substances – tensides - who are reducing the surface tension of a liquid

Defoamers are working more or less spontaneouslyAntifoams are acting more or less preventively

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How do defoamers / antifoams act ?

If water, foam activ substances and turbulencesare at the same place -> foam generates!

Foam bubbles contain a hugh amount of energy, due to the level of surface tension of the medium.The higher the surface tension, the smaller the bubble, the higher the level of contained energy

The lower the surface tension is, the bigger the foam bubbles, the easier they collapse.

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How do defoamers / antifoams act ?

Defoamers / Antifoams are workingbest, when the areplaced at the boarderline betweenliquid and gas

Boarderline

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Different types of antifoams

• esters on vegetable and synthetic base Struktol SB 303

• Polyalkylene glycols• fatty alcohols• dispersions of silica etc.• silicone emulsions

Struktol SB 2071• combination of a.m. products• powdered antifoams (“dry liquids”)

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Where to dose defoamers / antifoams

The dosage points of defoamers / antifoams reallydepend on the process conditions and the equipmentitself.

Mainly defoamers / antifoams are dosed into the fermenter but also during the substrate preparationand right before the DDGS process starts.

Defoamers are also doesd before the distillingprocess.

The recommended way of dosing Struktol defoamers is to do it in controlled, undiluted preventive form.

Therefore Struktol provides control and dosagesystems.

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Recommended products

For the startup phase of a plant we recommend a silicon emulsion, like our Struktol SB 2071- E-Numbercertified.

This defoamer is a general purpose defoamer and ready to use in every stage of the process.

Alternatively we recommend a silicon free product -Struktol SB 304 - which also complies to the FDA regulation.

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Where to dose defoamers / antifoams

Possible dosage points for antifoams

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Influences on consumption of the antifoam

Defoamer / Antifoamconsumptiondepends on

Capacity utilisationEquipment setup

Process typeBatch or Conti

SubstrateCIP Cleaning

Infections

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Different substrates – different level of foam

Maize

Foam

activ

ity

Sugar juice

Molasses

Rye

Triticale

Barley

Wheat

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Why does the foam situation vary by the use of different substrates ?

- Level of substrate entrained proteinsMore proteins -> tendencially more foam

- Metabolites of the used yeast strainCO2 , proteinogenic structures in accordance with the used

yeast strain

- Content of polysaccharides in the fermentation brewThe more sugar, tendencially more foam

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Does antifoams harm the production process?

In order to insure the quality of a high level product Struktol antifoamsare frequently tested at independent institutes to verify that there is no harm for e.g. a yeast fermentation with regard to yeast growth, etc.

If the antifoam is dosed in the recommended way – concentration, volume - there is no risk for the production process as Paracelsiustold us „Sola dosis facit venenum“

Due to the fact that the recommended Antifoams are food approved, there is also no risk for the DDSG production.

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What are the benefit of using antifoams

Often antifoams are used in order to run the process, because withoutit is immpossible.

If you want to utilise the full capacity of your equipment, antifoams /defoamers could help to realize it.

Antifoams / Defoamers could also make your process more stable, ifthey are dosed controlled and automatically.

S o l u t i o n s . T a i l o r m a d e . W o r l d w i d eFo

amle

vel

0 %

100 %

Liquidlevel

D

Dosage Antifoam(very huge amount – overdose)

Process time

Discontinous, preventive antifoam dosage

Cap

acity

utili

satio

n

S o l u t i o n s . T a i l o r m a d e . W o r l d w i d eFo

amle

vel

0 %

100 %

Liquidlevel

DDosage Antifoam(Very little amount)

Process time

Continous , controlled antifoam dosage

Cap

acity

utili

satio

n

……….

……….

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Pro and contra – defoaming methodes

Discontinous, preventive defoamingPro

-Easy to handle technique -Contra

Doing an overdose -> losing money, influencing the fermentation process (yeast growth, etc.)

Continuous, controlled defoamingPro

- lower defoamer consumption -> saving money

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How to do controlled continous defoaming?

Process Controll System

FoamdectorsAntifoam

Dosage pump incl. flow control

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Side aspects

Schill & Seilacher provides technical service.

Technicians are ready to optimize dosage process in tight cooperationwith the plant staff - world wide.

Schill & Seilacher is also ready to provide tailor made products.

Due to a broad knowledge in application of antifoams, Schill & Scheilacher is also ready to recommend antifoam products forsewage treatment plants.

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Thank you for listening!

Any Questions?