Cooking oil in the general bin is a household rule, not a kitchen rule

If you run a commercial kitchen, used cooking oil is not a bin decision. It does not belong in general waste, it does not belong in the food waste caddy, and it must never go near a drain. It belongs in a sealed, labelled container, stored off the kitchen floor, and collected as its own stream by a licensed carrier who takes it away for recycling. Get that separation right and the rest of your waste handling gets easier.

The household answer stops at the kitchen door

Advice from a binman, reported in August, is sound for a home cook. A waste collection specialist put it plainly: "Used cooking oil should go in your general waste. Do not put it in the food waste, and definitely not the recycling bin." He also gave the exception that decides everything for a business: "If you've got loads of it, like commercial, then no, it doesn't go in your general bin. You'd have to either contact your council or get someone else to come and collect it." That exception is where most kitchens live.

Volume is the whole difference. A jar of oil sealed in a carton and dropped in the black bin is a contained bit of household waste. A fryer emptied into a bin bag is a liquid load that splits sacks, coats the inside of a bin, ends up on the pavement and on the back of a collection vehicle, and leaves a kitchen with a hygiene problem it did not have that morning. The oil itself is not the hazard. Loose oil in a mixed bin is.

Where kitchens usually get caught out

• Pouring warm oil into the food waste bin because it came from food. Food waste collections are for solids, and liquid oil contaminates the load.
• Tipping oil into a wash-up sink or a yard gully when the fryer is hot and the shift is over. That is where blockages start.
• Decanting into old drums with no lid, no label and nothing underneath them, then storing them beside the back door.
• Assuming the general waste contractor will take it because it is food related. It is a separate stream and it needs a separate arrangement.

What to sort out

1. 1Work out roughly how much oil your fryers produce across a normal trading week. That figure decides the container size and the collection frequency you need.
2. 2Move to sealed, lidded containers kept away from the cooking line and away from any drain or gully.
3. 3Arrange a dedicated used cooking oil collection and keep the transfer paperwork from whoever collects it.
4. 4Brief the closing shift, because oil goes down a drain at the end of a service far more often than during it.
5. 5Check your other streams while you are at it. If oil has been going into food waste, that load has been contaminated for as long as the habit has been running.

Food waste is the stream to watch

Separating oil properly matters more this year because the food waste bin is carrying more than it used to. Across our own collections we have seen a major increase on food recycling this year, and a food waste load only works if what goes into it is genuinely food. Liquid oil is the fastest way to spoil an otherwise clean stream. FJL runs around 190,000 collections a year and sends 100 percent of what we handle away from landfill, and that record depends on customers keeping streams apart at the point of production, not on anything clever happening further down the line.

Summer is our busiest stretch, June to August, and kitchens under pressure are exactly where waste habits slip. Fix the oil route while you are thinking about it. The version of this that hurts is the version you discover when a sack splits in a doorway on a hot Saturday night.