Searching for a ‘green’ septic tank is not so easy. You may ask how to turn your poo into useful material and reducing the carbon footprint. Well - Mr I want to build a Straw bale house and I have been to a number of environmental events that showcase building material, solar, fences, and 2 types of green clean septic systems. We picked the worm farm. The worm farm company did all the permits and yes it rained the day of installation.
The worm farm is a huge plastic container buried underground with a compost bin on top of it – This is for all our food scraps and paper.
Oh yeh when we were investigating the worm farm, Mr I want to build a Straw bale house asked if the tank could take dead cows. The answer was I guess so, I think it was sold then. Given we are situated in a water catchment area the sand pit had to be one of the largest the company has fitted so far. Of course this costs more money than the average system.
The green living seems as though it is triple the cost of chemicals – we need more incentives, more rebates and a greater understanding of environmental impacts of the cheap solutions.
Mr I want to build a Straw bale house and I were on site when the 1st phase was installed and the left it up to the company to do the 2nd and 3rd phase in the rain by themselves. Trucks entering and digging up bits of the land caused more slush. 
We have not used it yet given the trenches have not been dug for the sewage. – its still raining. We have fed some of the worms with compost so I hope they are not drowning for we have not got the rest of the system connected for we need electricity to pump the waste through the sand pit then through the pipes to water the paddock.