is number of solutions proposed by different inventors, individuals
and institutions for low cost disposal of human waste to overcome
the health hazards that can be caused by open air defecation and
can be considered appropriate under the given local conditions and
limitations of available finances, materials, skilled labor, water
Shankar Septic Tank Latrine’ is the best solution among all
available ones, developed after extensive research and was adopted
by large numbers of people in India. Director General, Council of
Scientific Industrial Research, (CSIR) New Delhi, directed Central
Building Research Institute (CBRI) Roorkee to study the design of
“EverClean® Septic Tank Latrine” and to compare
its performance with other alternatives. CBRI studied the designs
& its performance in Oct, 1995 and found it suitable for every
tests on the samples of effluent were conducted at University of
Roorkee under the guidance of Dr. Arvind Kumar, Professor, Department
of Civil Engineering, and the results are included. The septic tank
consists of two specially designed readymade chambers of different
diameter and length. One of the readymade chamber is bigger in length,
while its diameter depends on the number of the proposed users.
It serves the purpose of primary tank. The other readymade chamber
may be half or the same length and diameter also changes with the
number of purposed uses. It works as subsidiary tank.
Septic Tank completely eliminates problem of cleaning the tank at
intervals. The method was tested by government laboratory (CBRI
- Roorkee). Not costly if compared with traditional septic tanks.
It does not pollute ground water, hence healthy for environment.
Maintenance free, simple and easy in adoption. It takes very little
space & less consumption of cement and bricks. Minimal chances
of damage during earth quake. Latrine can be built even on the tank
itself in case of want of space. The effluent of this system is
discharged into the open drain.
tests indicated that EverClean® Septic Tank is much more efficient
than the conventional septic tank in reduction of BOD, COD, Total
solids, Suspended solids and Volatile solids the effluent from the
tank, When mixed with the rest of house hold effluent from kitchen
& bathroom shall reasonably be fit to be directly discharged
into a open drain, as far as the parameters of BOD, COD, Total Solids,
Suspended solids, Volatile solids and PH is concerned. It is highly
recommended that this system can be adopted for large conversion
of dry/ service latrines into EverClean® Shankar Septic Tank
latrine in the areas where proper drainage system is not available.