Black Soldier Fly Foundation Transforms Cape Town Waste into Sustainable Soil Fertilizer
The Black Soldier Fly Foundation is transforming waste into valuable resources in Cape Town. The organization promotes and implements the use of black soldier fly larvae as an alternative soil fertilizer in areas like Lavender Hill. The larvae produce 'frass', a nutrient-rich by-product that enhances soil fertility and promotes sustainability.
Frass, costing R4,000 per ton, is a cheaper and more sustainable alternative to conventional fertilizers, which can cost between R12,000 and R24,000 per metric ton. It controls unpleasant odours and contains beneficial microorganisms that boost soil health and plant growth. Replacing just 1% of current soil amendment products with frass would be a significant step towards sustainability.
The black soldier fly larvae can convert up to 600,000 kgs of agri-processing waste per month into high-performance protein for pet and aquaculture feed. Spent brewers grain, amounting to around 40 million metric tons per year, can serve as feed for these flies. The larvae then produce frass, which improves water retention, enhances soil structure, and has a near-neutral pH, suitable for cultivating various staple vegetables. In closed-loop systems, frass can regenerate soil and contribute to healthy crop growth for the next harvest.
The Black Soldier Fly Foundation's innovative approach to waste management is benefiting Cape Town's outskirts and beyond. By converting waste into frass, they are creating a sustainable, cost-effective, and odor-free soil amendment that enhances soil fertility, promotes water retention, and supports local agriculture.
