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23 November 2021 | Story Leonie Bolleurs | Photo Tania Allen
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 opens centenary complex
2004-10-12

Today, 12 October 2004, the University of the Free State (UFS) opens the Centenary complex on the grounds of the old Reitz dining hall.

Me Edma Pelzer, Director: Physical Resources and Special Projects at the UFS, said the Centenary complex is furnished mainly for personnel and alumni, just as the Thakaneng Bridge was primarily established as gathering place for students.

On 10 March 2004 the UFS management held the first official function in the half completed complex during the unveiling of the memorial stone by the Rector, Prof Frederick Fourie. What made this occasion remarkable is that old President FW Reitz, 81 years earlier, on 10 March 1923, also laid a memorial stone at the same place, said Ms Pelzer. The complex originally existed of the Reitz dining hall, which was named after old president Reitz, a hostel father residence and administration offices. In historical documents about old president Reitz it is mentioned that already as chief judge he campaigned for the establishment of a university in the Free State and later as president he proceeded with this attempt.

With the opening of the Thakaneng-bridge food preparation and -serving at the Reitz dining hall was discontinued. The kitchen and dining facilities became obsolete. With the evacuation of the old student centre replacements for the Bloemfontein- and Anlgo American-rooms were to be found elsewhere on campus. The idea to convert the historical Reitz building complex in an UFS reception and a space for socialising started to exist.

Ms Pelzer said the UFS is committed to treat its history and its old buildings with respect and to utilise it optimally to enhance the strategic objectives of the university. The Centenary complex must communicate the university as an established, quality institution with an interesting history to visitors. It must serve as a home for alumni and as a one stop visiting point for important visitors who do not have time to experience the whole campus.

In the complex provision is made for entertaining and kitchen facilities, a museum where valuable UFS-memorabilia are kept and exhibited, an amfi theatre and an art gallery which would for the first time offer a permanent home for the art collection of the UFS. Venues will accommodate groups from between 15 to 300 persons.

The reception area will be used by the UFS for occasions such as chancellors’ functions, smaller and bigger receptions for the rector, tea parties after graduation ceremonies, openings of conferences and long service awards. The university also plans to rent out the complex for prestige occasions where the UFS personnel and alumni are involved.

The opening of the Centenary complex form part of the Centenary celebrations of this week. Many of this week’s activities will take place in the complex.

Media release
Issued by: Lacea Loader
Media Representative
Tel: (051) 401-2584
Cell: 083 645 2454
E-mail: loaderl.stg@mail.uovs.ac.za
12 October 2004

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