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New ARC-DALLRD-UFS research chair to focus on food and nutrition security

07 August 2024 | Story André Damons | Photo André Damons

Dr Alba du Toit, Senior Lecturer in the Department of Sustainable Food Systems and Development, is leading the newly established Innovative ARC-DALLRD-UFS Agro-processing for Climate-smart Food System research chair at the UFS.

The Innovative Agro-processing for Climate-smart Food System research chair, one of four ARC-DALLRD-UFS research chairs recently established at the University of the Free State (UFS), will focus on innovative agro-processing technologies that could affect food and nutrition security. The chair’s work will also focus on improving food systems that can impact socioeconomic development.

In a concerted effort to address the challenges and effects of climate change in Southern Africa, the UFS, together with the Agricultural Research Council (ARC) and the Department of Agriculture, Land Reform and Rural Development (DALRRD), established four new research chairs within the Faculty of Natural and Agricultural Sciences (NAS).

The other research chairs are Climate Change and Agriculture, Agriculture Risk Financing and Sustainable Livestock Production and together with the Innovative Agro-processing for Climate-smart Food System research chair, and fall under the umbrella of climate change. They will also be part of the centre of excellence of the ARC and DALRRD on Climate Smart Agriculture.

Dr Alba du Toit, Senior Lecturer in the Department of Sustainable Food Systems and Development, will lead the Innovative Agro-processing for Climate-smart Food System research chair and says the chair allows researchers to dedicate their time and effort towards research. It consolidates expertise, resources, and facilities to strengthen the research team’s capacity and will have a strong foundation for sustainable development goals. The chair provides a hub for collaboration between the UFS, ARC and DALLRD to focus on regionally engaged research with maximum societal impact.

The chair, which officially started on 1 July, also allows researchers to do trans- and multi-disciplinary, relevant and cutting-edge research.

Nixtamalisation could transform the food system

“We believe that nixtamalisation could transform the food system. However, the consumer’s willingness to adopt and embrace new products and techniques is dependent on the success of the initiative.

“Thus, innovations in new product development must be consumer-led since the consumer is constantly evolving, making it imperative to understand consumer behaviour and motivations behind decision-making,” says Dr Du Toit.

The nixtamalisation process, she explains, is a multistep technique commonly employed in Mexico, Central America and the southern regions of the US to transform maize into food products. The nixtamalisation process alters the physicochemical, nutritional and sensory properties of maize products by increasing protein quality, improving the content of calcium, magnesium and potassium and reducing mycotoxin levels.”

According to Dr Du Toit, by using the principles of circular food design, they will develop products that could provide solutions and support the food system. It involves using processing technologies that could be applied and implemented by anyone with access to a basic kitchen.

“This would benefit rural farmers and communities, small-scale and emerging farmers to provide food for themselves and become economically active small business owners. We believed the right product could not only influence the food security and well-being of individual households but also stimulate entrepreneurial action, which could benefit the community and overcome barriers to make nixtamalisation an acceptable practice for all,” says Dr Du Toit.

Maize and sorghum

“Maize and sorghum are staple crops in South Africa that are not being utilised to their full potential. South Africa is well known for its maize production, and it is the staple for most of the population in the form of pap. However, the reliance on pap exaggerates the issues of food and nutrition insecurity because pap cooked from Super Maize Meal is deficient in nutrients and often consumed in isolation without diversification in the diet.

“Sorghum is another cereal crop that is climate-smart, drought-resistant and suited in South Africa’s arid and semi-arid areas, while it offers good nutritional value. However, most consumers are not familiar with the crop except for its application as an instant porridge. Nixtamalisation is a process that could benefit consumers as maize and sorghum could be transformed into nutritious, safe meals directly from the farm to the fork,” explains Dr Du Toit.

Home-grown dried whole maize kernels, she continues, could be converted into safe and delicious meals in homes using basic equipment as it is widely and effectively done in Mexico by rural women. The research will determine if consumers would accept the process of nixtamalisation, whether the products would be acceptable, and if the nutritional value would be comparable to commercial products.

Some of the news consumer-acceptable products already developed, include maize chips, dehydrated phutu pap, and corndogs. Currently, the team is working on maize-milk, maize-milk frozen dessert and a custard tart. Maize products have the advantage of being lactose- and gluten-free and thus would appeal to consumers of plant-based products.

Societal impact

Dr Du Toit says she is excited about the societal impact this project will have on communities and the country and is hopeful that they will be able to influence policymakers and the industry to provide more nutritious staples that could be “game-changers” for the sake of society. She is looking forward to collaborating with DALRRD, the ARC and the grain industry to ensure that partnerships are strengthened and new opportunities are created for the staff and students.

Prof Wilna Oldewage-Theron, a Professor of Nutrition in the College of Human Sciences at Texas Tech University, will join the research chair next year as the co-leader. She has experience in community nutrition research in Africa, and her research interests include the factors contributing to household food insecurity and malnutrition in resource-poor communities. She will be focused on the nutritional benefits of soy for human health.

Prof Maryke Labuschagne, who is leading the NRF SARChI Chair in Diseases and Quality of Field Crops and who is passionate about impacting malnutrition, has been appointed as mentor for the chair.

News Archive

Bloemfontein's quality of tap water compares very favourably with bottled water

2009-08-04

The quality of the drinking water of five suburbs in Bloemfontein is at least as good as or better than bottled water. This is the result of a standard and chemical bacterial analysis done by the University of the Free State’s (UFS) Centre for Environmental Management in collaboration with the Institute for Groundwater Studies (IGS).

Five samples were taken from tap water sources in the suburbs of Universitas, Brandwag, Bain’s Vlei, Langenhoven Park and Bayswater and 15 samples were taken of different brands of still and unflavoured bottled water. The samples were analysed at the laboratory of the IGS, while the interpretation of the analysis was done by the Centre for Environmental Management.

“We wanted to evaluate the difference in quality for human consumption between tap water and that of the different brands of bottled water,” said Prof. Maitland Seaman, Head of the Centre for Environmental Management.

“With the exception of two samples produced by multinational companies at their plants in South Africa, the different brands of bottled water used for the study were produced by South African companies, including a local small-scale Bloemfontein producer,” said Prof. Seaman.

According to the labels, the sources of the water vary from pure spring water, to partial reverse osmosis (as an aid to standardise salt, i.e. mineral, content), to only reverse osmosis (to remove salts). (Reverse osmosis is a process in which water is forced under pressure through a pipe with minute pores through which water passes but no – or very low concentrations of – salts pass.)

According to Prof. Seaman, the analysis revealed some interesting findings, such as:

• It is generally accepted that drinking water should have an acceptable level of salt content, as the body needs salts. Most mineral contents were relatively higher in the tap water samples than the bottled water samples and were very much within the acceptable range of drinkable water quality. One of the bottled samples, however, had a very low mineral content, as the water was produced by reverse osmosis, as stated on the bottle. While reverse osmosis is used by various producers, most producers use it as an aid, not as a single method to remove nearly all the salts. Drinking only such water over a prolonged period may probably have a negative effect on the human physiology.

• The pH values of the tap water samples (8,12–8,40) were found to be slightly higher (slightly alkaline), like in all south-eastern Free State rivers (from where the water is sourced) than the pH of most of the bottled water samples, most of which are sourced and/or treated in other areas. Two brands of bottled water were found to have relatively low pH levels (both 4,5, i.e. acidic) as indicated on their bottles and as confirmed by the IGS analysis. The health implication of this range of pH is not significant.

• The analysis showed differences in the mineral content given on the labels of most of the water bottles compared to that found by IGS analysis. The possibility of seasonal fluctuation in content, depending on various factors, is expected and most of the bottling companies also indicate this on their labels. What was a rather interesting finding was that two pairs of bottled water brands claimed exactly the same mineral content but appeared under different brand names and were also priced differently. In each case, one of the pair was a well-known house brand, and the other obviously the original producer. In one of these paired cases, the house brand stated that the water was spring water, while the other (identical) “original” brand stated that it was spring water treated by reverse osmosis and oxygen-enriched.

• Nitrate (NO3) levels were uniformly low except in one bottled sample, suggesting a low (non-threatening) level of organic pollution in the source water. Otherwise, none of the water showed any sign of pollution.

• The bacterial analysis confirmed the absence of any traces of coliforms or E.coli in any of the samples, as was also indicated by the bottling companies. This is very reassuring. What is not known is how all these waters were sterilised, which could be anything from irradiation to chlorine or ozone treatment.

• The price of the different brands of bottled water, each containing 500 ml of still water, ranged between R3,99 and R8,99, with R5,03 being the average price. A comparison between the least expensive and the most expensive bottles of water indicated no significant difference in quality. In fact, discrepancies were observed in the most expensive bottle in that the amount of Calcium (Ca) claimed to be present in it was found to be significantly different from what the analysis indicated (29,6 mg/l versus 0,92 mg/l). The alkalinity (CaCO3 mg/l) indicated on the bottle was also found to differ considerably (83 mg/l versus 9,4 mg/l). The concentration of Total Dissolved Salts (TDS) was not given on the product.

“The preference for bottled water as compared to Bloemfontein’s tap water from a qualitative perspective as well as the price discrepancy is unjustifiable. The environmental footprint of bottled water is also large. Sourcing, treating, bottling, packaging and transporting, to mention but a few of the steps involved in the processing of bottled water, entail a huge carbon footprint, as well as a large water footprint, because it also requires water for treating and rinsing to process bottled water,” said Prof. Seaman.

Media Release
Lacea Loader
Deputy Director: Media Liaison
Tel: 051 401 2584
Cell: 083 645 2454
E-mail: loaderl.stg@ufs.ac.za
3 August 2009

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