South Africa faces one of the most troubling contradictions in the modern world: while over six in ten households struggle to put food on the table, thousands of tonnes of fresh fruit and vegetables are being dumped as waste every single year.
By Maile Matsimela, Digital Editor at African Framing
It’s a crisis that plays out in stark relief across the country’s food system, where abundance and scarcity exist side by side in a devastating cycle that seems almost impossible to believe, yet the numbers don’t lie.
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Dr Ikechukwu Opara, who recently obtained his doctorate in Food Science at the Stellenbosch University, has spent years documenting this crisis. The food systems researcher has uncovered some sobering truths about how much food we’re throwing away – and why.
When Good Food Goes Bad
Dr Opara’s research focused on South Africa’s largest fresh produce market, where he meticulously tracked what happens to fruit and vegetables from the moment they arrive until they’re either sold or binned. What he found was staggering: Between 9 124 and 17 969 tonnes of perfectly good produce goes to waste every year at the wholesale level alone.
To put that in perspective, it’s equivalent to between 450 and 900 fully-loaded large trucks – a convoy that would stretch for kilometres along the N1.
“The lack of comprehensive data on postharvest waste, particularly at critical points such as wholesale markets, makes it difficult to identify waste hotspots accurately,” explains Dr Opara. “This information gap has been hindering the development of tailored interventions.”
The Cold Hard Truth
So, what’s going wrong? Dr Opara’s investigation revealed that the cold chain, the system that keeps produce fresh from farm to plate, is breaking down at critical points.
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“We identified breaks in the cold chain as a significant challenge in the market,” he says. “This often results from operational challenges that cause delays between the receipt of produce and its placement in optimal storage conditions.”
The problem becomes particularly acute during summer months, when South Africa’s markets are flooded with fresh produce just as temperatures soar. Cold storage infrastructure simply can’t cope with the volume, leaving tonnes of fruit and vegetables to deteriorate in the heat.
Transportation adds another layer to the problem. When produce travels in unrefrigerated vehicles, a common practice to cut costs, it’s subjected to what Dr Opara describes as “unfavourable conditions such as inappropriate temperature and relative humidity levels.”
The result? Accelerated respiration and transpiration that leads to weight loss, shrivelling and a loss of visual appeal that make produce unsellable.
Smart Solutions for an Old Problem
But Dr Opara isn’t just documenting the problem; he’s also developing solutions. His research suggests that machine learning technology could revolutionise how fresh produce markets operate.
“Temperature control systems can be improved with machine learning tools that automatically monitor conditions and alert supervisors when temperature and humidity levels deviate from the set range,” he explains.
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The technology could also help predict demand more accurately, allowing markets to optimise their ordering and storage processes. Perhaps most innovatively, machine learning could enable dynamic pricing systems that automatically adjust costs based on how long produce has been in storage, encouraging quicker sales and reducing waste.
“The system automatically tracks the supply date and shelf life of fresh produce, using that data to recommend prices that encourage quicker sales, thereby helping to minimise potential postharvest losses,” Dr Opara says.
The Hidden Cost of Waste
The implications of this massive food waste extend far beyond the market gates. In a country where food insecurity affects nearly two-thirds of households, every tonne of wasted produce represents missed opportunities to feed hungry families.
But there’s an economic dimension too. When supply is reduced through waste, prices inevitably rise, hitting the poorest South Africans hardest.
“Reduced availability of fruits and vegetables due to these postharvest losses leads to higher prices,” Dr Opara points out. “When low-income households must pay these elevated prices, they are left with less money for other goods and services.”
This creates what he describes as a vicious cycle: “It exacerbates poverty and traps households in cycles of debt and dependence on government social grants. It further widens the gap between the rich and the poor in one of the most unequal countries in the world.”
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