SEPTIC TANK UNDER LATRINES (AQUA PRIVY) SYSTEM FOR SMALL COMPARTMENTS

Septic tank under latrines (Aqua Privy) can be made adjoining the privy wall wall or underneath (former arrangement is preferable) a water seal latrine instead of the pit. A vent pipe should be provided through the septic tank which can be fixed outside the privy wall. A manhole should also be provided for removal of the sludge, where the tank is built underneath a privy, it should be so constructed that the manhole is made outside the privy wall. Inside dimensions of the septic tank may be kept 1.8X0.75 meter and 1.5 to 1.8 metre deep with 150 to 230 mm air space. The effiuent is passed on to a soak pit or a filter chamber built adjoining the privy and then to the municipal drainage of the sewer line. This type of latrines are fixed in small compartments and may be useful for family of five or six.