There is a bucket like thing present between the kitchen outlet and the septic tank. Here the food particle gets deposited and they are broken into pieces at this place only. Then they are sent to the septic tank. But sometimes, it is not possible to clear the grease tap as the thing gets clogged with big food particles. So you need to search internet for Grease Trap Treatment Chemicals. There are lots of such products available in market and you need to go for the best one among them. It is your target to bag the best thing available there.