английский, 7.5 мб
Manual on the Design, Construction and Maintenance of Low-Cost Pour-tiush Waterseal Latrines in India
The pour-flush waterseal latrine consists of a squatting pan with
a steep bottom slope (25” to 30” to the horizontal) and a 20 mm waterseal
trap, set in a cement concrete floor. After use it is flushed by hand
using a small container holding about 1.5 to 2 litres of water. The
excreta are carried through a pipe or drain into two honeycomb leach pits,
which are used alternately. The liquid in the pits percolates into the
sub-sol1 and gases are absorbed by the soil, leaving the solids behind.
Each pit is designed to last for about three years before it gets filled;
when one is filled, it is taken out of use and excreta are then diverted to
the second pit. When the filled pit is left for about two years, the
contents turn into a rich organic humus which is safe f .r handling. When
convenient it is emptied and the contents may be used as manure* It is
then ready to be put back into use when the second pit fills up.