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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

Access to the Bloemfontein Campus
2015-04-02

Access Control Made Easy

The first phase of access control at the University of the Free State (UFS) was implemented in August 2014. The aim of this initiative is to tighten security measures on the Bloemfontein Campus.
 
Since November 2014, access control has been implemented at all five gates on the Bloemfontein Campus. These are:

  • The Main gate in Nelson Mandela Drive (Gate 1)
  • The gate in DF Malherbe Drive (Gate 5)
  • The gate in Wynand Mouton Drive (Gate 3) 
  • The gate in Furstenburg Street (Gate 4)
  • The gate in Badenhorst Street (Gate 2)

Here is some useful information about the access control system:

1. Remember your access card when you enter the campus

Dual-function cards (with distance reader compatibility) will make your movement through the gates more convenient. The university’s access system works automatically with remote or swipe action. Please make sure that you drive close to the reader or, better still, get the dual-frequency card to manage the distance between your vehicle and the remote card reader.

As of 23 March 2015, the extra security staff, who have been assisting at the gates since the implementation of access control on the Bloemfontein Campus, are no longer manning the card readers at the gates. Therefore, persons without cards will be able to enter the campus only at the one gate in DF Malherbe Drive where the Visitors Centre is situated. They will be referred to the Visitors Centre, where a day visitor’s card will be issued to them. You will need to produce a formal identification document (e.g. ID book, driver's licence).

Security will continue their normal duties at the guardhouses for the various gates on the campus.

2. Where do I get an access card?

You can apply at the university’s Visitors Centre front desk by producing your positive identification (ID book/passport/driver’s licence) and proof of payment for your access card.

You will then be directed to the Thakaneng Bridge where you will be able to collect your access card.

  • Go to the Cashier on the Thakaneng Bridge and pay your R65 for the dual-frequency card
  • Take your receipt, together with your existing card (if you have one), to the Card Division on the Thakaneng Bridge (next to Mellins Optometrists)
  • A new photo will be taken of you at the Card Office for your new card. Your new card will then be issued immediately.

Currently, there is a sufficient stock of the dual-frequency cards available at the Card Division on the Thakaneng Bridge.
 
Alternatively, you can apply online for your access card: http://apps.ufs.ac.za/cardapplication/application.aspx

Make sure you have the following documents ready to attach when completing the online form:

  • Copy of positive identification: ID/Driver's Licence/Passport
  • Signed declaration (http://supportservices.ufs.ac.za/dl/Userfiles/Documents/00007/4668_eng.pdf) by your service provider/employer (if you are a service provider) or a letter of confirmation from your spouse/partner/relative/coach/relevant UFS staff member or student in cases where you have to visit, pick-up or drop off your spouse/partner/relative frequently on the UFS Bloemfontein Campus.

Cost: R65 for a long-term card and free of charge for short-term visits and conference delegates. Pay at the Cashier on the Thakaneng Bridge or at Absa Bank, Account Number: 1 570 8500 71, Ref: 1 413 07670 0198.

3. Cutoff Date: 7 April 2015

After 7 April 2015, no pedestrian or motorist will be able to enter the campus without a valid access card. Persons without access cards will have to enter the campus at the gate in DF Malherbe Drive where the Visitors Centre is situated. You will then be referred to the Visitors Centre where you will have to apply for a day visitor’s card. It is important to note that no one will be able to enter the campus at the Visitors Centre without a formal identification document (e.g. ID book, driver's licence).

4. Dual-frequency card simplifies access to the campus

It is important to have your card ready on entering the campus.

This card will simplify access to the campus considerably, as the card reader will read the card when it is held in a vertical position at the driver’s side window in the direction of the distance reader. Please do not place the card on the dashboard. There is an antenna wire in the card. If the card is placed on the dashboard, you are not exposing the card surface to the reader, and that might influence the antenna’s response to the reader.

Remember, the distance between the reader and the boom is only a few metres.  If you approach the reader at a ’high’ speed, you are not allowing the system to identify your card, match it to the entry in the database, check if you are ‘legal’, and then send a signal to open the boom. 

All five gates are equipped with distance readers. Within the next three weeks, two extra distance readers will also be installed at the Main Gate in Nelson Mandela Drive.
 
Please note that the dual-frequency card is needed only when you enter the campus with a vehicle and you want to activate the distance reader. All the older cards will continue to work at the tag readers. 

5. Use alternative gates

At times, some of the gates carry more traffic than others, especially with the peak morning and afternoon traffic. Gates with less traffic include:

  • The gate in Badenhorst Street
  • The gate in DF Malherbe Drive
  • The gate in Nelson Mandela Drive

You are welcome to make use of one of these alternative gates.

6. Pedestrians

No pedestrian will be able to enter the Bloemfontein Campus without a valid access card. If you have left your card at home or have lost it, you should enter the campus at the gate in DF Malherbe Drive where the Visitors Centre is situated. You will be referred to the Visitors Centre where you can apply for a day visitor’s card. You will still need to produce a formal identification document (e.g. ID book, driver's licence).

7. More information

Email: visitorscentre@ufs.ac.za
Visitors Centre front desk: Tel: +27 51 401 7766 (Mondays-Fridays 07:45-16:30)
Card Division: Tel: +27 51 401 2799 (Mondays-Fridays 07:45-16:30)
Protection Services duty room: +27 51 401 2634 (24 hours)

 

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