Dear AP. At best have the ...
Published by Ajit Seshadri Seshadri, Er.
Dear AP.
At best have the least amount of soap.detergent. etc in use. Use more hot water and bio-soaps ie made of veg. oil origin.
Then opt for non mechanised biological ETP ie only septic tank. with stone pebble filters and in last stage have phyto r use of plants.
Use fountain in the polishing stage and all water can be safely used for irrigation.
Well wishes.
Prof Ajit Seshadri