I have a building which sits on top of clay ground so I couldn't soak away the grey water.
I explored solutions like leechfield,soakaway,cement ring well but all fails in clay ground.
I'd like some insights on how to handle the grey water coming from my building. approx 1800L per day like some technique to send the water into earth or is there any plant which can consume high level of water ?
There's no underground drainage system provided by local municipality as well.
The ground water table is at 8 to 10 feet(Salt water).
The town is part of bigger river delta(Kaveri or Cauvery)
I'd like to have a solution and manage the side effects as well
Any help would be appreciated
I have empty ground on right and back side of building , as the ground is expensive I can't buy and use that as leech field
The building has 3 houses one in ground floor and two in upstairs so it's like 10 or more people living in the apartment at any given time and with number of people are more so the grey water. The grey water is coming from washing clothes/utensils,bath room etc..
Here is my building foundation design
I know RAFT foundation is best for any type of soil including saturated clay.
My ground soil seems to be either clay or saturated clay
I've asked for local professionals advice here are some suggestions from them this includes my own research as well
Three cement ring wells ,one for each home and they said I'll have to keep the ring well between the pillars with 5 or 10 feet gap between each other. Each well should go upto 10 feet depth and last two feet has to be filled percolate materials and if water overflows then I will have to ask for moving tankers
- Seems best one
- I'm worried it might cause one side of building to sink as the soil might get loosened and some local professionals are agreeing that it could happen they can't guarantee but they said it's not likely to happen
Buy the neighboring ground and use it a leech field
- Seems good option as I don't have to dig any holes are which might affect building foundation
The ground is really expensive and not a good investment as the price might not soar much compared to other areas in town
There's a good chance someone might start construction in this empty plots in next 5 years which is good for my building foundation as well
Build a underground storage unit made of concrete and keep the bottom open as there's a chance for water to drain and water remains transport it out with moving tanker truck.
- Seems quite simple to do
It could become expensive as I have to build structure with concrete
This also might weaken the foundation
Recycle the water and use it for toilet flush
My water dependency reduces and it's environment friendly
It's expensive and might be hard to get some kind of certification from the government.
Not really sure about the smell and microorganism
I'm not really happy with solutions given by local professionals as they're dishing out suggestion based on their hunch rather than some technical analysis. I find their suggestion could become unreliable.
I'm looking for a solution which will not cause any damage to my building foundation and will be in reasonable cost.
- I read the below news and it really got me worried. https://www.thenewsminute.com/article/why-buildings-are-collapsing-house-cards-bengaluru-156578
Please find my soil texture below
Reference for soil texture: https://www.yumpu.com/en/document/read/6730715/cauvery-delta-zone-status-paper-tnau