Solving Odour Problem When Composting
Odor is the #1 issue people face with composting—but the truth is:
👉 A healthy compost shouldn’t smell bad (it should smell like soil/earth).
Here’s how to control it effectively in a Malaysia climate (hot + humid)
Why compost smells (root causes)
Bad smell usually means:
- Too wet (no airflow → rotting)
- Too much food waste (nitrogen overload)
- Not enough oxygen (anaerobic)
- Wrong materials (meat, oily food)
How to fix & prevent odor
- Balance “Green vs Brown” (MOST IMPORTANT)
- 👉 Always follow:
1 part green (food waste)
2–3 parts brown (dry materials)
- What to add to fix smell FAST:
- Dry leaves
- Shredded cardboard
- Newspaper
- 💡 If it smells → immediately add more “brown”
- Keep it aerated (oxygen = no smell)
- Turn/mix compost 1–2 times per week
- Make sure your bin has air holes
- 👉 No oxygen = rotting smell (like garbage)
- Control moisture (Malaysia is very humid)
- 👉 Ideal condition:
- Damp like wrung-out sponge
- Fix:
- Too wet → add dry leaves + mix
- Too dry → sprinkle a bit of water
- 💡 Heavy rain = common problem → always use a lid
- Cover food waste properly
- Every time you add scraps:
- Bury it under dry material
- Example:
- Add veggie scraps + Cover with leaves/cardboard
- Prevents:
Smell
Flies
Maggots
- Avoid “problem foods”
- Do NOT add:
- Meat
- Fish
- Dairy
- Oily food
- 👉 These cause:
- Strong odor
- Pests (rats, flies)
- Use the right bin (important)
- Best for odor control:
- Closed compost bin with lid
- Small ventilation holes
- Even better:
- 👉 Bokashi system (no smell if done right)
- Fermentation, not rotting
- Good for indoor/kitchen use
- Add natural odor absorbers (optional trick)
- You can sprinkle:
- Wood ash
- Soil
- Coconut coir
- Charcoal bits
- 👉 Helps neutralize smell quickly
- Location matters
- Place your compost:
- In a shaded area
- Away from doors/windows
- With airflow
Quick troubleshooting guide
Smell type Cause Fix
Rotten / garbage
- Too wet, no air
- Add dry leaves + mix
Sour / acidic
- Too much food waste
- Add brown materials
Ammonia (strong)
- Too much nitrogen
- Sewage-like
- No oxygen Turn immediately
👍 Best low-odor setup (Malaysia homes) - 👉 Ideal combo:
- Closed compost bin + lid
- Add dry leaves every time
- Turn weekly
- Optional: Bokashi for kitchen waste
Bottom line
If your compost smells: - 👉 It’s not “normal”—it just needs balancing.
- A good system should:
- Smell earthy
- Have no flies
- Look like dark soil