Hi Rick, we live on a small ...

Hi Rick, we live on a small holding that does not have a municipal sewer service.  What we have done works very very well.  We drain the grey water (and incidentally the septic tank outflow) into a re-purposed tank just below ground.  In there there is some separation of solids, with the overflow then distributed into a small vertical flow wetland (it is about 8m x 2.5m and 1.6m deep, lined with a hdpe lining - in our case also re-purposed).  the outflow from the wetland drains into a final tank where we have a submersible pump activated by a float switch which pumps the water to another header tank that feeds sprinklers in the garden.  As an additional treatment stage (not 100% necessary) we circulate the water in the first tank through a bed of  fish filter media (approximately 1m3) to allow an aeration stage and convert the ammonias to nitrates, some of the nitrates being denitrified when the water is nreturned to the tank which is in an anoxic condition.  we have 2 families including a small business living on the premises.  The final effluent is odourless. Hope this helps.