posted 8 years ago
What I've done is separate the drains on my double sink in the kitchen. The wash sink (with food particles, grease, etc.) still goes to the septic tank, but the rinse sink drain pipe goes out through the wall and then into a branched drain system into mulch pits around 3 small cherry trees.
By only using the rinse sink greywater I avoid all the hassles with filtering out the food particles and grease traps, and of course the ongoing need to constantly clean said filters and traps.
This won't fix your problem, but then if you can't fix it yourself you REALLY need to hire a plumber, ignoring the problem is not a viable option in the long run.
My opinions are barely worth the paper they are written on here, but hopefully they can spark some new ideas, or at least a different train of thought