the interplay between soil - detergent -...

The interplay between Soil - Detergent - Enzyme

to further drive Dish cleaning performance DuPont Industrial Biosciences | Dr Roel Hermant, Pieter Augustinus,

Monica Ochoa-Ruiz, Dr Arjan Siebum, Hamish Irving

1

Sustainability demands ever better cleaning performance

Lower temperatures

Less water Less chemicals

Greener chemical • Phosphate free

Enzymes offer a solution to improve performance further

DETERGENT MECHANICS

TEMPERATURE TIME

Machine

2 Copyright © 2015 DuPont. All rights reserved.

Enzyme

Detergent Soil

charge

charge

charge Hot spot

Cleaning

Charge-Performance-Triangle model

“Hotspot” cleaning requires an aligned interplay

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SOIL

4

Dish soils are mainly enzymatic - constantly developing

Soil type recent changes or context

Tea Bleach -

Egg yolk Protease increased from 1 to 1.5 g

Crème Brulée Protease replaced Egg Milk

Minced meat Protease baking from 120 to 130C

Milkskin Protease Tensio consult method, replaced milk

Mixed starch Amylase Starch suspension 2.6% to 3.3%

Pasta Amylase SGS Fresenius method, replaced Oat Flakes

Miele GSL2 G1223 Labor SC plus, 50C normal cycle, 21 dH,

5 repetitions, no rinse aid, ballast soil


Food soils are complex while enzyme action is specific

6

Acc. Voltage 5 kV

Magnification 5K

Granular starch

alpha-

amylase

alpha-

amylase

Scale

10-100 mm 1-10 mm 0.01-0.1 mm Copyright © 2015 DuPont. All rights reserved. 6

0

20

40

60

80

100

Pasta Mixed starch 4X

Miele 6382/ 50°C/21°GH (IKW)

Amylase A Amylase B

and different starch soils can give opposite positions

Cleaning Soil Removal Index


0

20

40

60

80

100

Amylase A Amylase B

Cleaning Soil Removal Index

Miele 6382/ 50°C/21°GH (IKW)

Mixed starch 4X DM277

Screening monitors are not yet fully representative


Soil monitor barriers to “hotspot” cleaning

• Intrinsic differences between soils – even for the same type • Develop more Dish soils to represent consumer reality

• Especially in wider (global) geographical context

• Alignment (Industry) on soil selection for cleaning remains essential

• High resource - expertise requirements to make IKW soils • No (high throughput) screening possible for most soils

• Available screening monitors are not yet fully representative


DETERGENT

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Different detergents have different in-wash conditions

1.5

2.0

2.5

3.0

3.5

9.5 10.0 10.5 11.0

pH (in wash)

Ionic strength

(in wash)

Commercial ADW

Detergent product


0

20

40

60

80

100

Amylase B Amylase A

SR

Miele 6382/ 50°C/21°GH (IKW)

small changes can significantly change performance

12

SR Mixed Starch

10.0 10.5 11.0

4

3

2

I (ms)

pH

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potential detergent formulation tools to boost cleaning

13

0

20

40

60

80

100

0 0.2 0.4 0.6 0.8 1 1.2

% w/w of enzyme

% SR Mixed starch

Amylase B

Increase beyond plateau >> 3 X enzyme dosage

Miele 6382, 50°C,21°GH (IKW)

+ 20% carbonate


Cleaning hotspots exist and can provide direction

14

Design-Expert® Software

Factor Coding: Actual

CS28 (%SR)

Design Points

47.9

41.7

X1 = A: pH

X2 = B: Conductivity

7 7.6 8.2 8.8 9.4 10

0.7

1.1

1.5

1.9

2.3CS28 (%SR)

A: pH (pH)

B:

Co

nd

uc

tiv

ity

(m

S)

40.7

40.7

42.2

42.2

43.7

43.7

43.7

45.2

45.2

46.7

47.9

48.1

Benchscale performance @ T = 20ºC

commercial HDL liquid

+8% NaCl

amylase performance Laundry Liquids

Low

performance


SUMMARY

15

0

1

2

3

4

5

6 7 8 9 10 11 12

ADW Gels

Pushing cleaning further to the limit: hotspot guidance

Laundry &

ADW Powders

Laundry Liquids Liquid (Handdish)

pH

I (conductivity)

Amylase X

mix Starch

Amylase Y

CS28

Amylase X

Pasta t

Amylase X

new monitor ??

Enzyme Detergent design


What we bring to the table

Options for formulation optimization to boost cleaning performance

Soil-monitor co-development with SGS Fresenius and CFT

Competitive solutions to match specific customer performance needs

Options for DEMO-claim support development

Test institutes Monitor suppliers Consumer Organisations

Detergent producers Enzyme suppliers Industry Organisations


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, DuPont™, and all products with ® or ™ are registered trademarks or trademarks of E. I. du Pont de Nemours and Company or its affiliates. Copyright © 2015 DuPont. All rights reserved. 18

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