Turning Waste into Profit

The Gold in the Gut: Why Pig Manure?

Pig manure is “hotter” (more nutrient-dense) than cow or goat manure. Because pigs eat high-protein diets, their waste is powerful. If you apply it directly to plants while fresh, it might “burn” them because it is too strong. But if you “cure” it (let it break down), it becomes a premium organic fertilizer that vegetable farmers in Kenya crave for their kales (sukuma wiki), cabbages, and fruit trees.

The Collection System: The Dry and Wet Split

To make money from waste, you must first manage it. The best way is to separate the solids from the liquids.

The Solid Scrape: Before you wash the pens with water, use a flat spade to scrape the solid dung into a bucket or wheelbarrow. This “dry” manure is the easiest to compost and sell.
The Liquid Run-off: The urine and wash-water should flow down your “Golden Slope” into a drainage channel. This can lead to a “soak pit” or, better yet, a collection tank for liquid fertilizer.

Value Addition: Three Ways to Cash In

1. The Compost Pile (The Easiest Money)

Don’t just heap the manure in a corner. Create a “Compost Station” using three simple wooden or brick “stalls.”

Stall 1 (The Fresh Pile): Fill this with the daily scrapings. Mix it with dry grass, maize stalks, or sawdust to reduce the smell and add “carbon.”
Stall 2 (The Cooking Pile): Once Stall 1 is full, move it here. Cover it with a plastic sheet. Every week, turn it with a pitchfork to let air in. The heat inside kills weed seeds and harmful germs.
Stall 3 (The Ready Product): After 6–8 weeks, the manure should look like dark, rich soil and have no “piggy” smell. This is ready for sale.

2. Liquid Fertilizer (Pig Tea)

Take the liquid run-off and dilute it with water (usually 1 part liquid waste to 10 parts water). This “tea” is a miracle for maize and fodder crops. You can use it on your own farm to grow the your local food, or sell it to neighbors as a liquid top-dress.

3. Biogas (The Energy Saver)

If you have more than 10-15 pigs, you have enough “fuel” for a small biogas digester. This system traps the gas released by rotting manure and pipes it into your kitchen for cooking.

The Benefit: It slashes your charcoal or gas bill to zero.
The Bonus: The “slurry” that comes out of the digester after the gas is gone is the best fertilizer you can find – it’s pre-processed and odorless!

Pricing and Packaging for the Market

In many local markets, farmers are moving away from expensive chemical fertilizers (DAP/CAN) and looking for organic options.

The Bulk Sale: Sell by the pickup truck (Probox or 1-ton lorry) to large-scale farmers.
The Retail Sale: Pack the cured, dry manure into 50kg bags (old feed bags). In Kenya, a 50kg bag of well-composted pig manure can sell for 300 to 600 KES depending on the region. If you sell 10 bags a week, that’s 24,000 KES a month – just from “poop”!

Managing the Stink (Neighbor Relations)

A commercial piggery can be shut down if the smell becomes a public nuisance. To keep the peace:

Plant a “Green Buffer”: Plant bananas or trees like Calliandra or Leucaena around your “Pig Fortress.” They act as a windbreak and absorb the odor.
Keep it Dry: The smell comes from wet manure. The faster you scrape the solids and drain the liquids, the less it will smell.
Use EM1: Effective Microorganisms (EM1) is a cheap liquid you can buy at agrovets. Spraying it in the pens and on the compost pile eats the smell-causing bacteria.

Case Study: The Green Piggy Bank in Nyeri

Farmer Mwangi had 20 pigs and 3 very angry neighbors who complained about the smell every time it rained. Instead of fighting them, Mwangi built a simple 3-pit composting system and planted 50 banana trees around his fence. He started giving a free bag of compost to his neighbors every month for their kitchen gardens. Within six months, the complaints stopped. Even better, Mwangi started selling 40 bags of manure a month to local coffee farmers, earning enough to pay his farm assistant’s entire salary. His “waste” paid for his “labor.”

Important things to keep in mind:

Never sell Fresh Manure. It can contain parasites and can burn the buyer’s crops, which ruins your reputation. Always “cure” it for at least 6 weeks.
Keep Trash Out. Ensure no plastic bags, glass, or needles get into the manure pile. High-quality fertilizer must be clean.
Location Matters. Place your manure pits downwind from your house and the pig house to ensure any remaining smell blows away from you.