I don't know if this product is available where you live, but there is an eco-friendly bacteria and enzyme product on the market called Accepta7101. You can check it out on line and see if there's an outlet near where you live that sells it. Or, you can look for a similar type of product with a different brand name.

after reading about the product, i would not ever use it in a septic system. in general if i wouldn't use it on my hands to clean them don't put it down the drain. i feel my hands and dishes are clean from germs with soap and water. and time to dry.