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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

Shimlas shock Tuks by staying calm
2016-02-19

Description: KL News 2016 02 19  Varsitycup Tags: KL News 2016 02 19  Varsitycup
Prop Ox Nche was one of the substitutes who had a huge impact against Tuks in Pretoria on 15 February 2016. Nche and other Shimlas substitutes helped their team wipe out a massive deficit. Photo: Johan Roux.

He has never been involved in a match like this in his rugby career.
This is what Neil Claassen had to say about his team’s performance on 15 February 2016, when the Shimlas came up with one of the biggest fight-backs in the history of the Varsity Cup in Pretoria. According to the Shimlas Captain, his bench had a great impact, and this helped in shocking Tuks with 47-46 towards the end. This came after Tuks had been leading 43-15 in the 44th minute.

Great fighting spirit
The Shimlas' fighting spirit, and a new Varsity Cup points system in which converted tries may count up to 11 points, enabled them to wipe out this deficit.
“It was a tough match, especially after being so far behind,” Neil said.
“Coach (Hendro Scholtz) told us during half-time (when we were 15-36 behind) that we should stay calm."
“We weren't completely out of the game. We knew that if we eliminated unnecessary mistakes, we could make it.”

Impact from bench
This is the second consecutive match - the other was against Ikeys in Cape Town - where the Shimlas’ substitutes swayed the match. “The bench made a big difference,” Neil said. “We also scored an 11-point try, which helped a lot.”
The Shimlas’ fullback, Marco Mason, was named Player of the Match. He succeeded with a tricky conversion to gain victory for his team.

Injuries
The eighth man, Nardus Erasmus (knee) and flanker, Fiffy Rampeta (eye socket), sustained injuries, but should be able to play in the first home game against the Madibaz on 22 February 2016. The injured scrumhalf, Zee Mkhabela (concussion), could return for this match.
Shimlas are second on the log, with nine league points after two away matches. Maties has ten league points.

Young Guns get stuck
The University of the Free State (UFS') Young Guns got stuck 8-14 against Tuks in Pretoria on 15 February 2016.
Vishuis, the UFS's residence team, will start their onslaught in the residence league against Dagbreek in Stellenbosch on 22 February 2016.

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