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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

New projects will enhance the infrastructure on our campuses
2011-02-04

 
Illustration:
The university's Main Gate in Nelson Mandela Avenue, as designed by The Roodt Partnership Architects.
 

A new entrance to the Main Campus, a high-performance centre, commercial gymnasium, rock-climbing wall, memorial garden for women and a botanical garden are but a few of the number of building and renovation projects that will take place at the Main Campus of the University of the Free State (UFS) in Bloemfontein. A number of projects are also being done on the Qwaqwa Campus.
On the Main Campus the entrance in Nelson Mandela Avenue is being adapted to match the university’s new corporative identity which was introduced last week. This project will be completed at the end of March 2011,
 
The creation of an environment conducive to the development of its students in the field of teaching, learning and research, as well as sports and culture is one of the main reasons why the UFS is renovating existing buildings and developing new infrastructure.
 
With the construction of a high-performance centre and commercial gymnasium, the university wants to create a work environment for its staff that will not only contribute to the cultivation of maximum work performance, but also to staff wellness. The centre with its foyer and administrative offices will furthermore consist of a health desk, university sports institute, sports sales, a spinning and aerobic centre, and dressing rooms. The total area will extend over 2114 m² and the construction will take approximately 18 months. This development will take place on the western side of the university’s Main Campus, directly opposite the Furstenburg Gate and next to the new student housing.
 
The UFS is also progressing well with other building projects which commenced last year. One of the projects is a new Education Building which is being constructed opposite the UFS Sasol Library. Upon completion this building will be used for the training of maths and science teachers in the Foundation Phase. It will include three classrooms for 100 students each and an auditorium for 225 students as well as an office block. The auditorium will also be used as a classroom. The building has been designed according to environmentally friendly principles to save water and use power effectively. It should be completed this year.
 
Planning for the construction of more student accommodation on the Main Campus as well as the Qwaqwa Campus is already well underway. On the Qwaqwa Campus, a residence with 200 beds is being constructed. This also includes a computer laboratory. According to the planning, this residence should be completed by the end of the first semester in 2011. Furthermore, four residences will be constructed on the Main Campus. These residences are in the planning phase.
 
In order to place technology within reach of Kovsie students and thereby empowering them, computer laboratories were installed at the respective residences. The computer laboratories will eventually make provision for approximately185 computers for student use. Proper security is also planned to safeguard the equipment.
 
Work to a new building for the Faculty of Health Sciences is also proceeding rapidly on the site where the vehicle pool and Hertz were previously used. This will include a lecture hall for 200 students, five venues for 100 students each, as well as offices. Students from the School for Medicine and Occupational Therapy will make use of these facilities.
 
The new building for the Faculty of Economic and Management Sciences between the Flippie Groenewoud Building and the Wynand Mouton Theatre is also coming along nicely.
 
On the university’s Qwaqwa Campus a new Education building is being constructed. This building will include a lecturing hall with 100 seats, four 50-seat classrooms, six offices, ablution facilities, a biology and science laboratory, as well as an information technology laboratory for 60 students.
 
In the meantime, existing buildings are being renovated on all the campuses. This includes, amongst others, improvements to the Architecture Building, the Biotechnology Building and the quarters for service workers on the Main Campus. Other improvements that have already been completed include the renovation of the Odeion’s foyer and the Callie Human Centre.
 
In future, students, staff and visitors to the UFS can also look forward to a rock-climbing wall at the Student Centre on the Thakaneng Bridge, a memorial park for women, residential accommodation within a sports environment, and a botanical garden.

 

Media Release
03 February 2011
Issued by: Lacea Loader
Director: Strategic Communication (actg)
Tel: 051 401 2584
Cell: 083 645 2454
E-mail: news@ufs.ac.za

 

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