Orpah School excess water with flush toilets
Posted: Tue Sep 02, 2008 9:57 am
I am working with Paul Harris on a design for a school digester in Haiti. I am currently designing an orphan school their. Whats nice about green construction is you can build to suite the need of the digester sewage system.
My questions are:
1. Does any one have a working design that minimizes the amount of flushed water in a US design toilet. I am wanting the minimum water and still clean the toilet. I have thought I would try for 2 liters but I need a high volume to wash the toilet. A European style toilet with the bowl elevated 4 or 5 feet with 2 liters in the bowl might work. Put a plastic jug in the bowl to reduce the water flushing but still allows the toilet bowl system to work normally. I would like to find a working design of any system that reduces the water.
2. Even with 2 liters the digester is huge. I am wanting a continuous feed system to minimize maintenance. Does any one have a design to separate some of the excess water so I can get the 50% mix of water to solid. 50% is what I have read is the target ratio for good gas production.
3. Once the water is separated how do you clean it so it can be released in a stream. Again I need to have a maintenace free system. I have thought about a two lagoon process with a gravel plant mix between the two. I understand the lagoon has to hold the water 100 days. This makes for a huge lake not a lagoon. Any one have a working design.
Currently the school is being designed for 250 kids. However based on others inout in the area it will grow by a factor of 10 or more. 2500 to 3000 kids is just too large a system. Any one else have scools with a digester and flushing toilets with water?
My questions are:
1. Does any one have a working design that minimizes the amount of flushed water in a US design toilet. I am wanting the minimum water and still clean the toilet. I have thought I would try for 2 liters but I need a high volume to wash the toilet. A European style toilet with the bowl elevated 4 or 5 feet with 2 liters in the bowl might work. Put a plastic jug in the bowl to reduce the water flushing but still allows the toilet bowl system to work normally. I would like to find a working design of any system that reduces the water.
2. Even with 2 liters the digester is huge. I am wanting a continuous feed system to minimize maintenance. Does any one have a design to separate some of the excess water so I can get the 50% mix of water to solid. 50% is what I have read is the target ratio for good gas production.
3. Once the water is separated how do you clean it so it can be released in a stream. Again I need to have a maintenace free system. I have thought about a two lagoon process with a gravel plant mix between the two. I understand the lagoon has to hold the water 100 days. This makes for a huge lake not a lagoon. Any one have a working design.
Currently the school is being designed for 250 kids. However based on others inout in the area it will grow by a factor of 10 or more. 2500 to 3000 kids is just too large a system. Any one else have scools with a digester and flushing toilets with water?