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Putting an environmental spin on laundry days

23 November 2021 | Story Leonie Bolleurs | Photo Tania Allen

Laundry research_web read more — Dr Jana Vermaas and Ketshepileone Matlhoko are working on research that leaves your washing clean and fresh without the use of any detergents, which is also beneficial to the environment.

Cold water or hot water? Omo or Skip? Laundry blues is a reality in most households and when you add stains to the equation, then what was supposed to be part of your weekly household routine, becomes frustrating and time consuming.

Researchers at the University of the Free State (UFS) are conducting research that is putting a whole new environmentally friendly spin on laundry day.

Sustainability and environmental conservation

Dr Jana Vermaas, Lecturer in the Department of Sustainable Food Systems and Development at the UFS, is passionate about textiles and sustainability – almost a decade ago, she conducted a study on the efficacy of anolyte as a disinfectant for textiles.

She describes the process: “During electrochemical activation, a dilute solution of natrium chloride/salt passes through a cylindrical electrolytic cell where the anodic and cathodic chambers are separated. Two separate streams of electrochemically activated water are produced. Anolyte as water was produced at the positive electrode and has a low pH, high oxidation-reduction potential and contains dissolved chloride, oxygen, and hydroxyl radical. It also has an antimicrobial effect.”

The benefits of this process are in line with her enthusiasm for environmental conservation.

According to Dr Vermaas, the amount of water and chemicals used to clean textile articles is massive. “Chemicals used to disinfect, for example, hospital laundry, are hazardous. Not all laundries in the industry have a closed loop system or try to remove the chemicals before the wastewater is discarded.”

“Different amounts of detergents have various effects on our fauna and flora. Due to their low biodegradability, toxicity, and high absorbance of particles, detergents can reduce the natural water quality, cause pH changes in soil and water, lead to eutrophication (too many nutrients), reduce light transmission, and increase salinity in water sources.”

“But with the catholyte and anolyte process, water returns to its original status, which means that the water solution becomes inactive again after production where it existed in a metastable state while containing many free radicals and a variety of molecules for 48 hours. Thus, no chemicals are left in the wastewater. The water can therefore be recycled, not as potable water but, for example, to flush toilets or to water plants.

“We should do what we can to save water,” she says.

Should you, like Dr Vermaas, also feel strongly about protecting the environment and want to obtain one of these machines that leaves your washing clean and fresh without the use of any detergents, you will be able to find such an appliance in South Arica. However, it does not come cheap. “It is a bit costly for residential use, but might be more accessible in the future,” states Dr Vermaas, who is of the opinion that it is a more sustainable option for commercial laundries.

Detergency properties and colourfastness

Recently, more research has been conducted on this topic, but with a focus on the detergency properties of the catholyte to clean different textile fibres (natural and synthetic). Catholyte, she explains, is water produced at the negative electrode with a high pH, low oxidation-reduction potential, containing alkaline minerals. It also has surface active agents that increase the wetting properties, and it is an antioxidant.

“A master’s student in the department, Ketshepileone Matlhoko, will be submitting her dissertation at the end of November on the possibility of using the catholyte as a scouring agent to clean raw wool,” says Dr Vermaas.

The department is also conducting studies to investigate the influence of both catholyte and anolyte on colourfastness.

*Graphic: Production of electrolysed water (Nakae and Indaba, 2000). Diagram: Supplied

News Archive

UFS Centenary 2004 / 2005 October (centenary) fest Activities

2004-10-08

Friday, 08 October 2004
17:00 – 24:00
Callie Human Centre, UFS
Macufe Rock Concert
With: Rooibaardt, Karen Zoid, The Narrow, F****polisiekar, Stuurbaard Bakkebaard (from the Netherlands), DJ Bob, Ready D, Neva Me.
Cost : R50-00
Bookings : Pacofs (051-447 7772)

Sunday, 10 October 2004
16:00 – 18:00
Callie Human Centre, UFS
Macufe Three Tenors Concert
With: Phillip Kotze, Chris Coetzer and Du Preez Stolz, as well as Angela Kerrison. Free State Symphony Orchestra conducted by Chris Dowdeswell.
Cost :R60-00 (adults), R40-00 (children, scholars, students and pensioners)
Bookings : Pacofs (051-447 7772)

Tuesday, 12 October 2004
11:00 – 15:00
Centenary Complex, UFS
Inauguration of Centenary Complex
Open day with a variety of musical recitals in different rooms
Cost : Free
Enquiries : Elize Rall (051-401 3382)

15:00 – 17:00
Parking area next to the Centenary Complex, UFS
Kovsie Mosaic Day
Collage of the Century, Dance to the beat, Cultural Cartoon,
Who’s line is it anyway?
Cost : Free
Enquiries : Louis Botha (051-401 2819) or
AC Geldenhuys (084 585 3338)

Wednesday, 13 October 2004
19:00
Centenary Complex, UFS
Première of documentary film : The Life and Legacy of King Moshoeshoe
Note : By invitation only
Enquiries : Elize Rall (051-401 3382)

Thursday, 14 October 2004
18:45 – 21:00
Red Square (in front of Main Building), UFS
Centenary Honorary Doctorate Degree Graduation Ceremony
Conferred on: Me. Antjie Krog, Prof. Jakes Gerwel, Mr. Karel Schoeman, Dr. Frederick van Zyl Slabbert, Prof. Saleem Badat, Dr. Khotso Mokhele, Prof. Robert Bringle, Prof. Leo Quayle, Prof. Jack de Wet, Prof. Kerneels Nel (posthumously), Prof. Boelie Wessels and Prof. Jaap Steyn .
Cost : Free. Please RSVP if you would like to attend.
Enquiries : Elize Rall (051-401 3382)

Friday, 15 October 2004
18:30
Centenary Complex, UFS
Alumni Dinner and Centenary Award Ceremony
Approximately 140 centenary medals will be awarded in acknowledgement of exceptional contributions to the development of the University. The award ceremony is followed by the Alumni dinner in the Callie Human Centre.
Cost : R100-00/person
Enquiries : Elize Rall (051-401 3382)

15:00 (to 12:00, Saturday, 16 October 2004),
UFS campus
Reunion : Momentum Adventure and Expedition Association
Including : Setting up of the Kovsie Momentum base camp, champagne breakfast and abseiling.
Cost : R50-00/person for breakfast
Enquiries : Gerrit van der Merwe (072 4317 153) or
Niel Fraser (082 772 5642)
Website : www.uovs.ac.za/associations/momentum_hrcc.

19:00 (to 11:00 Sunday, 17 October 2004)
Reunion : Cantare Revue Group
Including : Formal dinner, budget show, bring and braai, church service.
Cost : R100-00/person for the dinner
Enquiries : Louis Botha (051-401 2819)

19:00 (to 24:00 Saturday, 16 October 2004
Reunion : House NJ van der Merwe
Including : Senior Student’s Association and concerts
Cost : R5-00/person
Enquiries : Tutu Ntlathi (051-401 4122 / 072 865 2227)

Saturday, 16 October 2004
09:00 – 10:00
Committee Room 120, Faculty of Theology
Founding of Theology Alumni Association
Enquiries: Henna Nel (051-401 2669)

10:00 – 12:00
Parking area, CR Swart Building, UFS
Alumni Campus Tour
Including : Visits to the new physical developments on campus
Cost : Free
Enquiries : Jeanette Jansen (051-401 3594)

10:00 – 12:00
Sonnedou gazellie (next to NJ van der Merwe Residence), UFS
Reunion : Ladies’ Tea
Visit our new gazellie and find out what Sonnedou is up to these days.
Cost : R25-00/person
Enquiries : Anne-Marie Delport (072 109 0507)

12:00 – 16:00
JBM Hertzog Residence (garden in front of Senior Student’s Association), UFS
Reunion : Braai
Cost : Approximately R20-00/person
Enquiries : Hattingh Bornman (084 240 5226)

12:00 Vergeet-my-nie Residence, UFS
Reunion : Braai
Bring and braai. We supply the facilities. Bring old photographs and stories. Enjoy Aunt Juls’ last visit.
Cost : Free
Enquiries : Mari Jordaan (051-444 2832/072 392 4444)

12:00 HF Verwoerd Residence Senior Student’s Association, UFS
Reunion : Spit roast
Cost : R60-00/person
Enquiries : Jan-Chris Landman (051-401 3613 / 082 664 6062)

18:30 Floreat Hall, Bloemfontein Civic Centre (Braam Fisher Building)
Irawa 60 Reunion
For all former editors, former and current main editorial staff and coworkers
Cost : R100-00/person
Enquiries : Sanri van Wyk (072 333 1011)
Elzette Boucher (072 180 6265)

19:00 – 24:00 Red Square (in front of Main Building), UFS
Informal Alumni Reunion
Spit roast and stories in a marquee
Cost : R60-00/person
Enquiries : Elize Rall (051-401 3382)

Sunday, 17 October 2004
10:00 – 11:00
Kovsie Church
Church Service

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