Of all the habits we try to teach in our community trainings across Kasarani, none matters more than waste segregation at source — keeping organic waste, recyclables and general waste in separate containers inside the household, before collection ever happens. It sounds like a small, almost bureaucratic detail. In practice, it is the single biggest factor determining whether a household's waste becomes a resource or a burden.

What "segregation at source" actually means

Segregation at source simply means sorting waste into distinct streams at the point it's generated — in the kitchen, at the market stall, in the office — rather than dumping everything into one bin and hoping it gets sorted later. For a typical Kasarani household, that means three categories: organic waste (food scraps, peelings, garden trimmings), recyclable waste (clean plastic, paper, glass, metal) and general waste (everything else, including non-recyclable packaging and sanitary items).

It is a habit, not a technology. No special bins, trucks or infrastructure are strictly required to start — just a household's willingness to keep two or three containers instead of one.

Why mixed waste is expensive and dangerous to sort later

Mixed waste is unpleasant and costly to separate after the fact, for reasons that aren't always obvious until you've seen a sorting yard in operation. Food scraps that have been sitting against paper and plastic for even a day contaminate both, making them unfit for recycling no matter how carefully they're picked out afterward. Liquid from organic waste soaks into cardboard and soils otherwise-clean plastic. Broken glass hides inside general waste bags, creating a real injury risk for the collectors and sorters who have to handle every bag by hand.

When a household separates its waste into just three streams before collection, far more of it — kilogram for kilogram — can actually be composted, recycled or safely disposed of, rather than downgraded to landfill because it arrived too contaminated to process.

The three-bin system we teach

We supply simple three-bin guidance to every household that joins our collection route, using colour cues that are easy to remember and easy to teach to children: green for organic waste, blue for recyclable waste, black for everything else. It costs a household nothing beyond two extra containers — often repurposed buckets or sacks rather than anything purchased new — and it is the single change that makes the biggest difference to what happens to that waste next.

Green: organic waste

Peelings, leftover ugali, tea leaves, vegetable trimmings and other food scraps. This stream feeds our composting programme directly and, for households that want to compost at home, can be turned into usable fertiliser within six to eight weeks.

Blue: recyclable waste

Clean, dry plastic bottles and containers, paper, cardboard, glass and metal. This is the stream that feeds our plastic buy-back initiative — residents are paid per kilogram for clean, sorted plastic brought to a buy-back point.

Black: general waste

Anything that doesn't fit the other two categories — contaminated packaging, broken items that can't be repaired or recycled, and other non-recoverable material.

What segregation makes possible downstream

Every other programme we run depends on segregation happening correctly at the household level first. Our composting output is only as good as how clean the organic stream arrives. Our plastic buy-back rates depend on plastic arriving already sorted by type, since recyclers pay differently for PET drinking bottles versus HDPE containers. Even our collectors' safety depends on general waste not concealing broken glass or sharp material that should have gone into a separate stream. Segregation at source isn't a nice-to-have alongside collection — it's the foundation the rest of the system is built on.

How to start segregating waste at home

  • Set aside two extra containers beyond your current rubbish bin — buckets, crates or sacks all work.
  • Keep the organic bin somewhere accessible in the kitchen, since that's where most food waste is generated.
  • Rinse recyclables roughly before setting them aside; they don't need to be spotless, just free of food residue.
  • Ask household members, including children, to sort as they go rather than trying to separate a mixed bin later — it's far easier to do it once than to redo it.
  • Check your collection day for organic, recyclable and general waste, since we collect each stream on a different schedule in most villages.

Frequently asked questions

Do I need special bins to start segregating waste?

No. Any two or three separate containers — buckets, sacks or repurposed boxes — work perfectly well. What matters is consistency, not equipment.

What if I can't tell whether an item is recyclable?

When in doubt, rinse it and place it in the recyclable stream. Our sorting team can separate genuinely non-recyclable items at the yard; what we can't recover is material contaminated by food waste it was never separated from.

Does segregation actually change what happens to my waste?

Yes, directly. Segregated organic waste goes to composting instead of general disposal. Segregated recyclables go to licensed recyclers instead of landfill. Mixed waste, once contaminated, usually can't be recovered at all.

How long does it take to build the segregation habit?

Most households we work with report it feels routine within two to three weeks. The households that struggle most are usually ones trying to sort a full bin retroactively rather than separating as waste is generated — starting fresh with the three-bin habit from day one is far easier than reorganising an existing mixed bin.

We run hands-on segregation demonstrations as part of our estate visits and school programme — see our recycling education programme for details, or request one for your compound at no cost.

Common segregation mistakes we see, and how to fix them

Even committed households slip into a few predictable habits that undo good sorting intentions. Wet food waste dropped into the same bag as recyclables, "just this once," contaminates everything in that bag, not just the food item itself. Plastic bags themselves, unless explicitly accepted by a buyer, often get treated as recyclable when they're not; check with your collector which plastics your local buy-back point actually takes. And sanitary waste, nappies and similar items should always go into general waste, never mixed with organics, since they can't be composted and create a genuine handling hazard for collectors.

The fix for most of these is simply consistency: keep the three bins in fixed locations, use them the same way every time, and treat sorting as part of finishing a meal or a task rather than an extra chore tacked on afterward. Households that make it a routine rarely go back to mixed bins once they see how much lighter and less unpleasant a properly sorted general waste bag becomes.