I’ve heard multiple times that it’s not okay to allow any food to go down the drain even with a garbage disposal, I guess because solids shouldn’t go down the drain. But we put a shit ton of solids down the drain through the toilet and that seems to be fine. Does the toilet go to a different sewage pipe then the sink? Or does shit have different properties that make it dissolve better?
This doesn’t separate sink drains and toilet drains, it just prevents rainwater from diluting the sewage water. The water coming out of your sink is still considered sewage water.