Household
Machine Cleaning

Household dishwashers and washing machines are highly susceptible to biofilm formation. A variety of internal metal, plastic and rubber parts of these appliances harbour growth of mixed bacterial/fungal communities that are protected by extracellular polymeric substances (EPS).

Biofilm formation within a dishwasher.

Biofilms formed in these conditions can contribute to biotransformation of organic matter to generate noticeable malodour.

These biofilms can also lead to dispersion and persistence of bacterial/fungal groups leading to disease pathogenesis. Fungi have been well documented inside dishwashers and washing machines with domestically sourced fungal infections on the rise steadily over the last decades.

Reference taken from; Zupancic et al: PLOS ONE | DOI:10.1371/journal.pone.0148166 February 11, 2016.

Biofilm formation within a dishwasher.

Biofilms formed in these conditions can contribute to biotransformation of organic matter to generate noticeable malodour.

These biofilms can also lead to dispersion and persistence of bacterial/fungal groups leading to disease pathogenesis. Fungi have been well documented inside dishwashers and washing machines with domestically sourced fungal infections on the rise steadily over the last decades.

Reference taken from; Zupancic et al: PLOS ONE | DOI:10.1371/journal.pone.0148166 February 11, 2016.

Environmental pressure for temperature reduction (e.g. cold cleaning) and removal of harsh, yet effective, antimicrobial ingredients (e.g. bleach) has made the situation even more challenging.

Existing products often seek only to mask bad odours with fragrance and the current machine additives market is targeting cleanliness and freshness. Increasingly, consumers are turning to additional products such as bleach to address hygiene concerns. Lactams offer an environmentally friendly solution against biofilm build up and contamination in household appliances, thereby addressing the underlying cause, not the symptom.

Environmental pressure for temperature reduction (e.g. cold cleaning) and removal of harsh, yet effective, antimicrobial ingredients (e.g. bleach) has made the situation even more challenging.

Existing products often seek only to mask bad odours with fragrance and the current machine additives market is targeting cleanliness and freshness. Increasingly, consumers are turning to additional products such as bleach to address hygiene concerns. Lactams offer an environmentally friendly solution against biofilm build up and contamination in household appliances, thereby addressing the underlying cause, not the symptom.

✓  Lactam prototype incorporated into mousse formulation utilising standard Unilever methods
✓  Mousse shown to deliver lactam, durable to rinses, onto appliance surfaces
✓  Appliance surfaces exhibited marked microbial growth reduction

✓  Lactam prototype incorporated into mousse formulation utilising standard Unilever methods

✓  Mousse shown to deliver lactam, durable to rinses, onto appliance surfaces

✓  Appliance surfaces exhibited marked microbial growth reduction

The technology is at TRL 5. Discussions are ongoing with Unilever plc in relation to their Global Laundry Division being a route to market for the Penrhos Bio machine cleaning products.

The technology is at TRL 5. Discussions are ongoing with Unilever plc in relation to their Global Laundry Division being a route to market for the Penrhos Bio machine cleaning products.