Nairobi Entrepreneurs Turn Waste Into Millions Through Compost, Animal Feed

The mountains of green waste piling up across Nairobi's residential zones represent a problem for city planners and an opportunity for entrepreneurs who arrived early. In the past eighteen months, at least seven small-scale composting operations have launched in industrial areas from Mlolongo to Ruai, capitalising on what waste management experts describe as a critical gap in the city's refuse handling system.

The opportunity emerged quietly. Kenya's National Treasury and the World Bank flagged Nairobi's organic waste mismanagement as a constraint on both environmental sustainability and agricultural productivity in 2024. Today, that constraint has become a business model. Composting entrepreneurs report selling finished product at 1,200 to 1,800 shillings per 50-kilogramme bag—margins that have attracted dozens of new entrants to what was, three years ago, an informal backyard operation.

"The market wasn't there before," says one Ruai-based operator who has expanded from a single 400-square-metre plot to three sites in twelve months. Demand now comes from three sources: commercial farms in the Kiambu corridor seeking certified organic inputs; horticulture businesses in South C and Lavington; and increasingly, large real estate developers who use compost for landscaping. A typical operation processes between 500 and 1,200 tonnes of feedstock monthly and breaks even within eight to fourteen months.

The earliest movers—operators who began formalising their processes between late 2024 and early 2025—now hold informal monopolies on supply contracts with mid-sized agricultural cooperatives and some institutional buyers. What distinguishes them from later entrants is not technology but relationships. They have certification from the Kenya Bureau of Standards, standing orders from three to five anchor clients, and crucially, payment terms that allow them to reinvest quickly.

Success remains uneven. Many new entrants have overestimated throughput capacity or underestimated compost curing timelines. But for those who navigated the first year profitably—chiefly operators in Ruai and Mlolongo with proximity to both waste sources and agricultural demand—the business has become materially viable. One operator reports expanding workforce from four to seventeen staff in fourteen months.

The window for new entrants is narrowing. As larger waste management firms and agricultural input companies notice the margin opportunity, competition for feedstock supply agreements and retail shelf space is intensifying. For now, the advantage belongs to those who moved fast enough to build trust with buyers, but not so fast they degraded their reputation with poor-quality product.

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