it is never a good idea to dispose off your used cooking oil by pouring them into your kitchen sink. Over the course of time, your kitchen drain pipe will get clogged and then you will have a tough time trying to unclog your kitchen sink drain. If you have been doing just that for quite sometime, now is the best time to stop pouring used cooking oil into your kitchen sink drain. I have seen people whose septic tank was destroyed and their drain pipe clogged with thick layers of cooking oil. At times, this may also causes back flow of water onto your basement due to septic tank oil problem. It cost money to call a drain professional to unclog your drain pipe or to fix your septic tank.
What you should be doing to properly dispose off your used cooking oil are:
1. If cooking oil is not much in quantity, you can put them into a plastic bag (Without holes) and soak some dry paper towel along with the cooking oil. The paper towel will absorb most of the cooking oil. Allow this plastic bag with cooking oil to freeze in your freezer or outside if temperature is below freezing. Let the oil hardens and place it in your green bin. Freezing can be done only during winter. But if summer time, simply use more of the paper towel to soak up the cooking oil and then throw in green bin.
2. You can bring your cooking oil to one of the City's drop off depots close to your local home area. They will be most willing to help you dispose off the cooking oil correctly.
3. For larger quantity between 10 Litres to 50 Litres, you can request a free pickup online or by calling your city's hotline number.