Reducing the environmental impact of washing with liquid detergents
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Reducing the environmental impact of washing with liquid detergents. Environmental impact of laundering. Sustainable detergents through enzymes. Taking the LCA approach. Proof of concept. Summary. Q&A. AGENDA. Environmental impact of laundering.

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Reducing the environmental impact of washing with liquid detergents

Reducing the environmental impact of washing with liquid detergents


Reducing the environmental impact of washing with liquid detergents

NOVOZYMES PRESENTATION

Environmental impact of laundering

Sustainable detergents through enzymes

Taking the LCA approach

Proof of concept

Summary

Q&A

AGENDA


Reducing the environmental impact of washing with liquid detergents

NOVOZYMES PRESENTATION

Environmental impact of laundering


The main environmental issues with laundering

NOVOZYMES PRESENTATION

The main environmental issues with laundering

A whopping 90 percent of the energy used by a washing machine goes to just heating the water

Source: Carbon Conscious Consumer (C3)

A fraction of the surfactants in the detergent is not completely removed in wastewater treatment plants and enters the environment

Source: Environmental Science & Technology


Other environmental issues with laundering

NOVOZYMES PRESENTATION

Other environmental issues with laundering

High water consumption to wash effectively

Increased pressure on agricultural land to produce palm oil used to manufacture surfactants

High water consumption to formulate liquid detergents


Reducing the environmental impact of washing with liquid detergents

NOVOZYMES PRESENTATION

Sustainable detergents through enzymes


Three green wins with enzymes

NOVOZYMES PRESENTATION

Three green wins with enzymes

Surfactants

Builders

Reduce toxicity

Save energy

Surfactants

Builders

Others

Enable compaction


Reducing the environmental impact of washing with liquid detergents

NOVOZYMES PRESENTATION

Taking the LCA approach


Life cycle assessment lca

Large planes with overlap.

Use: Communication of Today/Tomorrow issues.

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9

NOVOZYMES PRESENTATION

The goal of LCA is to compare the full range of environmental damages assignable to products and services, to be able to choose the least burdensome one.

guide

Life Cycle Assessment (LCA)

LCA is the investigation and valuation of the environmental impacts of a given product or service caused or necessitated by its existence.


Novozymes lca facts

NOVOZYMES PRESENTATION

Novozymes LCA facts

  • Novozymes uses LCA to assess and compare the environmental impact of conventional and enzyme-assisted solutions delivering the same benefit

Considered environmental impact categories include:

  • Global warming (g CO2)

  • Critical Dilution Volume (CDVtox)

  • Acidification (g SO2)

  • Energy consumption (kJ)

  • Agricultural land use (m2.a)

  • Freshwater consumption (L)


The system boundaries of this study

NOVOZYMES PRESENTATION

The system boundaries of this study

The environment

Enzyme production

Detergent formulation

Washing 2.7 kg laundry

Wastewater treatment

Heat production

Chemical production

Fuel extraction

Processes addressed by toxicity screening

Processes addressed by lifecycle assessment


Reducing the environmental impact of washing with liquid detergents

NOVOZYMES PRESENTATION

Proof of concept


The trials

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NOVOZYMES PRESENTATION

guide

The trials

  • A liquid detergent formulated by Novozymes to reflect a typical US mid-tier product was used

  • Comparisons were made between:

    • 100% detergent

    • 90% surfactant + 1% multienzyme solution (protease, amylase, and mannanase)

    • 70% surfactant + 2.55% multienzyme solution (protease, amylase, mannanase, cellulase, and lipase)

  • Wash trials were conducted at 59°F (15°C) and 86°F (30°C) and were repeated four times

  • Performance was assessed over a broad range of enzyme- and surfactant-sensitive stains relevant to North American consumers


Better wash performance with enzymes

NOVOZYMES PRESENTATION

Better wash performance with enzymes

  • Conclusions

  • Enzymes can replace surfactants, and

  • Wash temperature can be reduced from 86 °F to 59 ° F without significant loss in performance

Reflectance (sum of 22 stains)

Wash conditions: Whirlpool top loader, 15 min (2 rinse), 6 °dH, 22 stains


Lower the impact on global warming with enzymes

NOVOZYMES PRESENTATION

Lower the impact on global warming with enzymes

g CO2 eq.

86 ° F  59 °F

  • Conclusions

  • The CO2 savings obtained by reducing the wash temperature are significant

Surfactants  enzymes

Detergent: 70% surfactant + 2.55% multienzyme solution

Data is per wash of 2.7 kg laundry


How much energy can we save with enzymes

NOVOZYMES PRESENTATION

How much energy can we save with enzymes?

If all consumers in North America washed their hot/warm washes at the cold/cold – the savings would equal:

21 million barrels of oil, which is slightly more than one day's average consumption of petroleum in the US


How much energy can we save with enzymes1

NOVOZYMES PRESENTATION

How much energy can we save with enzymes?

If all consumers in North America washed their hot/warm washes at the cold/cold – the savings would equal:

19 fully-loaded oil tankers


How much energy can we save with enzymes2

NOVOZYMES PRESENTATION

How much energy can we save with enzymes?

If all consumers in North America washed their hot/warm washes at the cold/cold – the savings would equal:

7.4 million tons of CO2, which equals annual emissions from 2 million cars


Reduce aquatic toxicity with enzymes

NOVOZYMES PRESENTATION

Reduce aquatic toxicity with enzymes

CDV (m3)

  • Conclusions

  • Toxicity is measured in CDV, which is critical dilution volume

  • CDV for surfactants is much higher than for enzymes, which are readily biodegradable

Surfactants  enzymes

86 ° F  59 °F

Detergent: 70% surfactant + 2.55% multienzyme solution

Data is per wash of 2.7 kg laundry


Reduce aquatic toxicity with enzymes1

NOVOZYMES PRESENTATION

Reduce aquatic toxicity with enzymes

If all washes in the United States were done with detergents that were reformulated to have just 70% of the surfactant content and 2.55 wt% multienzyme solution

CDV –Contribution to aquatic toxicity

Detergent

Washing machine

Wastewater treatment plant

River

– in excess of 5 million Olympic swimming pools (which equals 140% of the annual water consumption of Arizona) worth of water would be safeguarded against toxicity from detergents in one year


Savings on emissions from degradation of detergent

NOVOZYMES PRESENTATION

Savings on emissions from degradation of detergent

CO2 – Contribution to global warming

CO2 – Contribution to global warming

Detergent

Washing machine

Wastewater treatment plant

River

If it is considered that the detergent degrades aerobically in the wastewater treatment facility – then the savings with an enzyme reformulated detergent containing just 70% surfactant are nearly 150–300 g CO2 eq./wash, equaling the annual emissions of 2 million cars


Reducing the environmental impact of washing with liquid detergents

NOVOZYMES PRESENTATION

summary


Summary

NOVOZYMES PRESENTATION

Summary

  • Enzymes can replace surfactants without loss in performance

  • If all US consumers used enzyme reformulated detergents and washed to the cold setting, the savings would almost equal

    • one day's average consumption of petroleum in the US

    • Nearly 140% of the annual consumption of water in Arizona will be safeguarded against toxicity


Acknowledgements

NOVOZYMES PRESENTATION

Acknowledgements

This study could not have been possible without the

relentless efforts of:

Jens Øbro

Research Scientist

Novozymes

Dr. Teresa Neal

Marketing Manager

Novozymes

Anne Merete Nielsen

Senior Life Cycle Economist

Novozymes


Reducing the environmental impact of washing with liquid detergents

NOVOZYMES PRESENTATION

Q&A


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