Composting in Singapore sounds like something for landed homes with a garden, but plenty of people manage it from an HDB kitchen or a service yard with the right method. Food waste is one of the larger waste streams the country deals with, and the national push under the Zero Waste and food-waste efforts encourages households to cut what they throw away and, where possible, divert scraps from the rubbish chute. Doing it in a flat means working around small spaces, no garden, and a hot, humid climate that can turn a careless bin smelly fast. This guide covers reducing waste first, the composting options that actually suit flats, and how to keep smell and pests under control in our tropical weather.
Reduce First, Then Compost
The greenest scrap is the one you never create, so before setting up any bin it pays to waste less food in the first place. This is where the biggest difference is made, and it costs nothing.
- Plan and shop to a list. Buying only what you will cook that week is the single most effective habit, especially with fresh produce that wilts fast in our heat.
- Store food properly. Keeping vegetables, herbs, and leftovers in the right part of the fridge extends their life and cuts spoilage.
- Use up leftovers. Cook smaller portions, repurpose leftovers into the next meal, and check the fridge before ordering in.
- Understand date labels. “Use by” is about safety, while “best before” is about quality, so food is often fine a little past the latter.
- Share the surplus. Give away extra festive goodies or bulk-buys rather than letting them expire.
Only after trimming the waste stream does composting the unavoidable scraps, peels, cores, and trimmings make full sense.
Composting Options That Suit Flats
You do not need a garden. Several methods work in the limited space of a flat, each with trade-offs in effort, smell, and what you do with the finished product.
- Bokashi bins use a bran inoculated with microbes to ferment food waste in a sealed bucket. They handle a wide range of scraps, including small amounts of cooked food, take up little room, and stay closed so smell is contained. The catch is that bokashi produces a pre-compost that still needs to be buried in soil or added to a larger compost to finish, plus a liquid you drain off regularly.
- Small aerobic bins and countertop composters break down fruit and vegetable scraps into a soil-like material. Some are simple containers, others are powered units that speed things up. They suit smaller volumes and need a plan for using the output.
- Community garden composting is often the neatest fit for HDB living. Many community gardens run a shared compost where residents can contribute scraps, so you do the collecting and the garden handles the composting and uses the result on its plots.
- Worm bins (vermicomposting) work for the committed, using worms to process scraps, though they need shade, stable conditions, and care to keep the worms happy in the heat.
If you have no use for finished compost and no balcony plants, the community route or simply reducing waste may serve you better than a bin sitting unused.
Managing Smell and Pests in the Tropics
Our climate is the real test. Heat speeds decomposition, and an open, wet, poorly managed bin invites smell, flies, and worse. A few principles keep things civil.
- Keep it covered and balanced. A sealed bokashi bucket or a well-closed bin limits odour. In open or aerobic systems, balance wet food scraps (“greens”) with dry material (“browns”) like shredded paper or dry leaves to cut sourness and sogginess.
- Drain the liquid. For bokashi, empty the leachate regularly so it does not pool and turn foul.
- Do not overload. Adding more than the system can process is the usual cause of a smelly, sludgy bin.
- Site it wisely. A shaded, ventilated spot on the service yard beats a hot, sealed store. Keep bins off direct afternoon sun.
- Stay ahead of pests. Cover food scraps promptly and avoid meat and dairy in open systems, which draw flies and pests fastest. And in line with NEA’s Mozzie Wipeout advice, never let any tray, liquid catcher, or saucer hold stagnant water where mosquitoes can breed; empty and wipe them regularly.
Done properly, a home compost need not smell or attract anything, but it does ask for consistent, small habits rather than a set-and-forget approach.
What You Can and Cannot Compost
Knowing what goes in avoids most problems. The rules vary a little by method, and bokashi is more forgiving of cooked food than open bins.
| Method | Space needed | Handles cooked food? | Finished output | Best for |
|---|---|---|---|---|
| Bokashi bin | Small, sealed bucket | Yes, in small amounts | Pre-compost to bury | Flats with some soil or a garden link |
| Small aerobic / countertop | Small to medium | Limited | Soil-like material | Fruit and veg scraps, balcony plants |
| Community garden compost | None at home | Depends on garden rules | Handled by the garden | HDB residents without space |
| Worm bin | Medium, shaded | No | Rich castings | Committed hobbyists |
As a general guide for most home systems:
- Good to compost: fruit and vegetable peels and scraps, coffee grounds and filters, tea leaves, eggshells, and dry browns like paper and dead leaves.
- Avoid in open bins: meat, fish, bones, dairy, and oily or heavily sauced food, which smell and attract pests. Bokashi can take small amounts of these.
- Keep out: plastic, glass, metal, and anything non-organic.
When unsure, start with plain fruit and vegetable scraps, which are the easiest and least troublesome to process.
The Bigger Picture on Food Waste
Household composting is a small piece of a national effort. Singapore imports most of its food and sends a large volume of food waste for disposal each year, which is why reducing waste and recovering resources feature in the country’s Zero Waste and sustainability plans. Some newer developments include centralised food-waste handling, and community and school gardens increasingly compost on site. You do not need to solve any of that alone. Wasting less, sorting your scraps, and contributing to a shared compost or running a modest bin at home all add up, and they cut what goes down the chute and out to the incinerator. Start with reducing waste, pick a method you will actually keep up with, and let the habit grow from there.
Explore more
Composting fits into a wider low-waste home, so read our guide to a sustainable home in Singapore for energy, water, and everyday choices that go beyond the kitchen. For more on cutting what you buy and bin, our zero-waste home ideas guide has practical swaps. And if you plan to use your finished compost, our indoor plants and gardening guide shows where it can go.