Could you provide information on how you arrived at these numbers? The peak seems high to me...1/3 of total daily estimate used in 15 min? The daily estimate works out to around 180 L/guest/day, again this may be a little high/conservative as I am assuming that the necessity to truck in water would result in water conservation priority in design of plumbing fixtures and overall water usage practices at the resort?
The amount of water I would like to process is 5000L (15 min duration) at peak use that is water from the wash basin, shower and laundry. Total grey water per day is estimated at 15,000L.
Peter VanDerWal wrote:Well you can run through the formulas, etc. but generally speaking you want a large enough "Constructed Wetlands" that can contain about 5 days worth of grey water, this is to ensure that the water stays in the wetlands long enough for the plants and bacteria to process most of the BOD.
The gravel is going to take up at least 50% of the containment area, so you'd need something large enough to hold about 150,000L
1 meter depth is fine, but it's gong to need to be a LOT wider than 50cm, probably going to need to be at least 4 meters wide. Most recommendations say to make the wetlands square, but I've seen some studies that indicate the wetlands that are up to 10 times as long as they are wide work just as well.
Here is a design guide by the US EPA (Design Manual: Constructed Wetlands Treatment of Municipal Wastewater), it's a little conservative in some areas, but has a lot of good info
P Lyons wrote:What area of Indonesia. I spent 3 years there. I sent you a PM with some contacts that are involved in the types of development you are considering, they all happen to be based in Bali, but they likely have contacts in other regions as well.
Tobias Ber wrote:heya.... would it be possible to divert the blackwater from the greywater?
by using urine diverters and male urinals (duct into the greywater) you might reduce the amount of blackwater even further.
there s a system (there are posts here on the forums) where the black water drops into a container with woodchips and compost worms. after that the water could be treated by a sedimentation chamber or swirl filter and the a reed-bed (or go directly into your greywater system).
i think, a long and narrow ditch/trench along the perimeter of your estate would be a good thing for the greywater. and and multiple small units (a pond/wetland with trees, reeds, bamboo etc.)