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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

Childhood passion becomes a successful career
2016-12-19

Description: Dr Thapelo Makae Tags: Dr Thapelo Makae 

Dr Makae took up his studies at the South Campus
of the UFS, and now serves as a community vet in Tshwane.
Photo: Anja Aucamp


Dr Thapelo Makae’s youthful passion has been a driving force in his chosen career. He says: “Like any veterinarian, my love for animals started from childhood. Growing up, I always asked myself why animals didn’t have doctors like we kids did, when our pets fell ill or died.” While veterinary services were unknown where he was raised in the Phelindaba location in Mangaung, Bloemfontein, Dr Makae started doing his own research as early as Standard 1 (Grade 3). He affirms, “I’ve always wanted to help these creatures that, it seemed, no one could help.”

Having started his academic journey on the South Campus in the CPP (as the University Preparation Programme was then known), Dr Makae obtained an undergraduate degree in Agriculture, later completing an honours degree in Agriculture. “It was at this stage,” he says, “that I was recruited by Prof Johan Greyling and the late Dr Luis Schwalbach. With their support, I completed my MSc Agric, besides having the opportunity to be a junior lecturer in Animal Physiology. Dr Schwalbach was my supervisor, my mentor, and a veterinarian himself, and I worked very closely with him. He encouraged me to pursue my passion and the dream to go ahead and study Veterinary Medicine.”

Realising that dream, Dr Makae is now employed at the Gauteng Department of Agriculture and Rural Development as a community veterinarian. Among his many responsibilities, he is charged with serving the communities of the Tshwane Metro, where he visits farmers, assisting them with health and vaccination plans, and providing advice to help them develop their skills.

Dr Makae also seeks opportunities to pass on his dream. “What I am most passionate about is going to schools and giving talks to schoolchildren, especially those from previously disadvantaged communities, who might not know much about Veterinary Medicine,” he says.

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