If an invention by Vital Nzaka, a Congolese chemist and inventor, is anything to go by, then cassava farmers might soon find a new market for their crops. Nzaka has developed a groundbreaking battery system that uses cassava starch as its primary component, generating 220 volts and lasting up to two weeks without recharging.
By Maile Matsimela
For African farmers currently cultivating cassava, this innovation presents a remarkable prospect: Their humble root crop could soon serve dual purposes, contributing to both food security and energy storage. The same starch currently sold to industrial processors could command premium prices as a component in renewable energy storage systems.
Central to Nzaka’s energy-generating system is a compound he developed, named Vitium, derived from lemons. This compound acts as an oxidiser within the battery, enhancing its efficiency and longevity. By combining Vitium with cassava starch, salt, and water, Nzaka can produce multiple batteries capable of providing consistent electrical output. This method not only utilises renewable resources but also offers a non-toxic alternative to conventional batteries, which often contain harmful substances such as mercury and lead.
“With sufficient cassava plantations, entire cities could be electrified,” declares Nzaka. Farmers who are already harvesting cassava for starch processing would simply need to explore additional market channels. The same processing infrastructure used for food-grade starch could potentially be adapted for energy-grade starch production, creating economies of scale that benefit both applications.
Reimagining Cassava’s Value
Currently, South African cassava production has traditionally focused on industrial starch applications, with smallholder farmers treating it as a secondary crop. However, this battery innovation could fundamentally alter the crop’s value proposition. Instead of competing solely in traditional starch markets, farmers could access premium energy storage markets where innovation commands higher prices.
South African cassava farmers face challenges including disease-prone varieties, long maturation periods exceeding 18 months and yields below global averages. However, the energy storage application could justify investments in improved varieties and farming technologies that boost starch content and yield.
Again, for local farmers, where climate resilience is increasingly important, cassava offers distinct advantages. It thrives in marginal soil, requires minimal inputs and withstands drought conditions that challenge other crops. These characteristics make it an ideal candidate for farmers seeking to diversify their operations while contributing to renewable energy solutions.
The emergence of cassava-based batteries could justify expanding South Africa’s current modest cassava footprint significantly. The timing appears particularly advantageous given South Africa’s ongoing energy challenges. Local production of battery components from agricultural sources could reduce dependence on imported energy storage systems while creating new revenue streams for farmers.
Rural communities that grow cassava could potentially generate their own electricity from the same crop that feeds their families. Nzaka’s system also incorporates other agricultural inputs, including the previously mentioned compound derived from lemons, creating potential market linkages between citrus and cassava farmers. This interconnected approach demonstrates how agricultural innovation can create synergies across different farming sectors.
Traditional lithium-ion batteries contribute significantly to greenhouse gas emissions during production and pose disposal challenges. Cassava-based batteries offer a biodegradable alternative using renewable agricultural inputs, positioning farmers as contributors to environmental sustainability rather than mere producers of commodities.
The nontoxic nature of cassava-based batteries, compared with conventional batteries containing mercury and lead, aligns with growing consumer preference for environmentally responsible products. South African farmers entering this market would be participating in a green technology revolution from its inception.
Despite the exciting possibilities, South African farmers considering cassava for energy applications must navigate several considerations. Current varieties may require upgrading to achieve optimal starch content and yield for dual-purpose production. Investment in processing infrastructure and market development would be necessary to capture the full value of this innovation.
Nzaka faces significant hurdles in securing financial support to scale production and establish advanced laboratory facilities. He has issued appeals to investors, philanthropists and institutions to back his vision of providing sustainable energy solutions across Africa. With adequate funding, his innovations could be industrialised, enhancing energy accessibility and fostering economic development.
