So next years big project will be adding some type of system to process the household wastewater. I have already built a eco toilet that doesn't use water, so the only wastewater we produce is from washing the dishes and when we shower/brush teeth... and general cleaning products (we use eco products). The EU/Finnish law is forcing us to put in something other than letting it run out in to the garden. The products on the market here are quite limited and I am not sure what will get past the planning department, but if anyone on here has any suggestions it would be greatly appreciated.