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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 DiMTEC will help compile national emergency management system
2017-10-11

Description: UFS DiMTEC will help compile national emergency management system Tags: UFS DiMTEC will help compile national emergency management system

Preparedness and response are the two most important aspects of managing disaster when it strikes. Prof Andries Jordaan, Head of the Disaster Management Training and Education Centre for Africa (DiMTEC) at the University of the Free State (UFS) recently attended an incident command course in California in the US.

Learning from US disaster management systems
More than 20 specialists from 17 countries attended the course where participants were introduced to the National Incident Management System (NIMS) in the US. The system was implemented after lessons learned during 9/11. “According to the NIMS structure, all government organisations at all levels as well as emergency agencies had to standardise terminology and systems,” said Prof Jordaan.

The professor also had the opportunity to visit among others the Federal Emergency Management (FEMA) headquarters in California, some State Coordination Centres as well as several other disaster management centres. He also had the chance to shadow an Incident Management Team (IMT) during active operations.

Providing training for local disaster management
Insight gained during this course, as well as Prof Jordaan’s experience as senior officer in the South African National Defence Reserve Forces, provided him the necessary background to conduct training and give assistance in terms of disaster management.

Through DiMTEC Prof Jordaan will assist the National Disaster Management Centre with the implementation of a national emergency management system. He will also provide training for incident management teams.

“DiMTEC is currently also in the process of developing a Master module in disaster response. Command and control and Incident Command will form a sub-module in the disaster response module,” he said.

From South Africa, Prof Jordaan was joined on the course by General Elias Mpumelelo Mahlabane from the South African Police Services, who is responsible for disaster management in the SAPS. Savage Breytenbach, a trainer in rural fire fighting who assists Mangaung with command and control structures, also attended the course.

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