Use fabric softener sheets instead of liquid!
Use liquid detergent instead of powder!

Ditto
Ditto

Use a lint screen on any waste water coming from your washer before it hits the ejector pump to your septic system.

capecodcook,

Most fabric softener is just like putting hamburger grease down the drain. With a handful of exceptions, the liquid fabric softeners you buy in the supermarket or at a big box store are petroleum based.

If you have a good colony of bacteria and enzymes in your septic, they will eat those lipids and break them into smaller organically absorbable compounds... eventually... maybe.

The plant based fabric softeners - i.e. soy or coconut - such as Method (at Target), Seventh Generation and the now defunct Downy Advanced are generally easier for the septic colony to digest since the plant fat/lipid molecules aren't as complex as the petroleum based ones. (Sort of like the difference between unsaturated fats and saturated fats.)

As long as you use limited amounts of plant derived softener and feed your septic colony (i.e. with something similar to Rid-X, Bioprime, etc.), you should be fine. You're not putting anything down the drain that isn't passing out your colon already.

- IT Geek