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14 April 2021 | Story Dr Chantell Witten | Photo Supplied
Dr Chantell Witten is from the Division of Health Professions Education.

A decade ago, Rob Nixon, a professor in the humanities and environment studies at Princeton University in the US, introduced the concept of slow violence in the context of climate change and environmentalism, explaining slow violence as violence that occurs gradually and out of sight, a violence of delayed destruction that is dispersed across time and space, an attritional violence that is typically not viewed as violence, at all. While profound, Professor Nixon’s concept of ”out-of-sight violence” and ”violence of delayed destruction” was challenged by Professor Thom Davies from the University of Nottingham in the UK who urged scholars to instead ask the question: ”out of sight to whom?” He argued that structural inequality mutated into noxious instances of immediate slow but pervasive violence by those who have endured toxic landscapes and unhealthy physical environments.

Reflecting on the impact of COVID-19 in the context of persistent hunger in South Africa’s cities, Dr Gareth Haysom from the University of Cape Town, challenged us as society to recognise the ”slow violence“ of hunger and food insecurity that are also often “experienced in private, incremental and accretive ways that are often invisible”. But as urged by Professor Davies, the question of child hunger and malnutrition in South Africa is really, to whom is this hunger and malnutrition invisible?

Malnutrition and its debilitating consequences have been studied and known about as far back as the 1950s. In 1976, Stoch and Smyth from the then Child Psychiatric Unit and Department of Paediatrics and Child Health at the University of Cape Town reported on a 15-year developmental study conducted from 1955 to 1970 on the effects of severe undernutrition during infancy on subsequent physical growth and intellectual functioning on coloured children from the Cape Flats concluded that the effects of severe undernutrition during infancy on subsequent brain growth and intellectual development confirmed gross retardation of intellect in the undernourished group when compared to the controls. Furthermore, the study concluded that given the abnormal performance of the control group that there was much evidence to suggest that the controls were also suboptimal in terms of nutritional status and intellectual functioning. This means that in general the nutritional status of coloured children on the Cape Flats was poor. Fast forward to 2021, and child nutrition in South Africa is still sub-optimal.

South Africa’s nutrition indicators have worsened

The most recent data from 2016 National Demographic Health Survey showed that 27% of children under the age of five years are stunted or too short for their age. This equates to more than 1.5 million children whose health and development is compromised and who have a lower chance of reaching their full potential even into their adult years. While many countries of the same economic development status have improved their nutrition indicators, South Africa’s nutrition indicators have worsened. South Africa has been identified as one of the countries with high levels of multiple forms of malnutrition manifested in high levels of stunting, childhood obesity and multiple micronutrient deficiencies, the most notable being vitamin A deficiency. These multiple forms of malnutrition cast a long shadow of ill-health and delayed development. of children, robbing them of quality of life and years of life in their childhood and their adult years. Malnutrition has a double cost on quality of life and additional health costs consuming resources that could have been spent on better food.

The right to have access to sufficient food is embedded in Section 26 and 27 of our Constitution and the right to adequate nutrition for children is stipulated in section 28. The Bill of Rights enshrined in the Constitution states that “every citizen has a right to have access to sufficient food, water and social security” and that “the State must take reasonable legislative and other measures, within its available resources, to achieve the progressive realisation of this right”. Before the onslaught of COVID-19, we as health and social care professionals, have been acutely aware that a significant number of South Africans do not have access to sufficient food and go hungry on a daily basis. Malnutrition is well-documented in South Africa and unfortunately is progressively getting worse.

SA has not prioritised children or the realisation of their human rights to food and nutrition

Better nutrition can only be achieved when food and care are available to young children but in the context of rising food prices, limited maternal support and a difficult psychosocial environment, mothers are not able to provide their children with a health-enabling environment. Our high levels of stunting and obesity levels reflect the chronic situation of poor-quality and inadequate diets coupled with poor caring practices. While these poor dietary practices are often individualised and focused on mothers, there are many systemic and structural barriers for families to access affordable and nutritious diets. The food environment is shaped by a profit-centred food system that comes at the cost of people’s health and well-being. Children have always being the prime focus of the food industry, from the promotion of maternal supplements to improved maternal nutrition for the developing foetus, to the promotion of infant formula as a convenient and easy-to-use alternative to breastfeeding, to the manipulative marketing of foods for and to children.

Child nutrition has become a global tracking indicator for both human and economic development. Sadly, our lack of progress over the past 20 years clearly illustrates that we, as a country, have not prioritised children or the realisation of their human rights to food and nutrition. The findings of the 2020 Child Gauge gives us, as a country, the opportunity to stop the violations of children’s rights and to end the slow violence of child malnutrition.

News Archive

Researcher part of project aimed at producing third-generation biofuels from microalgae in Germany
2016-05-09

Description: Novagreen bioreactor  Tags: Novagreen bioreactor

Some of the researchers and technicians among the tubes of the Novagreen bioreactor (Prof Grobbelaar on left)

A researcher from the University of the Free State (UFS), Prof Johan Grobbelaar, was invited to join a group of scientists recently at the Institute for Bio- and Geo-Sciences of the Research Centre Jülich, in Germany, where microalgae are used for lipid (oil) production, and then converted to kerosene for the aviation industry.

The project is probably the first of its kind to address bio-fuel production from microalgae on such a large scale.  

“The potential of algae as a fuel source is undisputed, because it was these photoautotrophic micro-organisms that were fixing sunlight energy into lipids for millions of years, generating the petroleum reserves that modern human civilisation uses today.  However, these reserves are finite, so the challenge is marrying biology with technology to produce economically-competitive fuels without harming the environment and compromising our food security.  The fundamental ability that microalgae have to produce energy-rich biomass from CO2, nutrients, and sunlight through photosynthesis for biofuels, is commonly referred to as the Third-Generation Biofuels (3G),” said Prof Grobbelaar.

The key compounds used for bio-diesel and kerosene production are the lipids and, more particularly, the triacylglyserols commonly referred to as TAGs.  These lipids, once extracted, need to be trans-esterified for biodiesel, while a further “cracking” step is required to produce kerosene.  Microalgae can store energy as lipids and/or carbohydrates. However, for biofuels, microalgae with high TAG contents are required.  A number of such algae have been isolated, and lipid contents of up to 60% have been achieved.

According to Prof Grobbelaar, the challenge is large-scale, high-volume production, since it is easy to manipulate growth conditions in the laboratory for experimental purposes.  

The AUFWIND project (AUFWIND, a German term for up-current, or new impetus) in Germany consists of three different commercially-available photobioreactor types, which are being compared for lipid production.

Description: Lipid rich chlorella Tags: Lipid rich chlorella

Manipulated Chlorella with high lipid contents (yellow) in the Novagreen bioreactor

The photobioreactors each occupies 500 m2 of land surface area, are situated next to one another, and can be monitored continuously.  The three systems are from Novagreen, IGV, and Phytolutions.  The Novagreen photobioreactor is housed in a glass house, and consist of interconnected vertical plastic tubes roughly 150 mm in diameter. The Phytolutions system is outdoors, and consists of curtains of vertical plastic tubes with a diameter of about 90 mm.  The most ambitious photobioreactor is from IGV, and consists of horizontally-layered nets housed in a plastic growth hall, where the algae are sprayed over the nets, and allowed to grow while dripping from one net to the next.

Prof Grobbelaar’s main task was to manipulate growth conditions in such a way that the microalgae converted their stored energy into lipids, and to establish protocols to run the various photobioreactors. This was accomplished in just over two months of intensive experimentation, and included modifications to the designs of the photobioreactors, the microalgal strain selection, and the replacement of the nutrient broth with a so-called balanced one.

Prof Grobbelaar has no illusions regarding the economic feasibility of the project.  However, with continued research, optimisation, and utilisation of waste resources, it is highly likely that the first long-haul flights using microalgal-derived kerosene will be possible in the not-too-distant future.

Prof Grobbelaar from the Department of Plant Sciences, although partly retired, still serves on the editorial boards of several journals. He is also involved with the examining of PhDs, many of them from abroad.  In addition, he assisted the Technology Innovation Agency of South Africa in the formulation of an algae-biotechnology and training centre.  “The chances are good that such a centre will be established in Upington, in the Northern Cape,” Prof Grobbelaar said.

 

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