There are number of solutions proposed by different inventors, individuals and institutions for low cost disposal of human excreta disposal 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 labour, water etc.
Long back in 1970 one visionary person named Mr Balram Singh paid attention on the bad sanitation condition of India and invented a simple yet effective septic tank design for people where sewer lines was not available. He got patent for his septic tank invention from government of India in the name of Shankar Balram Septic Tank in 1970 and his family members are still doing business with same design even though the patent has been expired. The trademark and copy right protection of their septic tank design is still in force and nobody can use the name Shankar or Balram with respect to septic tank business, however anyone who wishes to install this septic tank design can do so as patent has been expired and the design is in public domain.
Now there is an improvement in Sanitation situation in India but still not satisfactory so professionals from the sanitation field, engineers, institutions and the inventors should think about the low cost sanitation so that people from all walks of life can go for affordable on site waste treatment systems. We are doing the same too and continuously making efforts to improve the existing septic tank designs to enhance the efficiency of disposal methods. Information posted here is only for education purpose for general public, students or technical professionals who wish to do research in this field. The respective trademarks mentioned here at this website is the property of the respective owners and we are no way connected with them.
As per the test report of CBRI “Shankar Balram Septic Tank Latrine” is the best solution among all available ones up to year 1995, 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 Septic Tank Latrine and to compare its performance with other alternatives. CBRI studied the designs & its performance and found it suitable for every soil conditions; however some points have not been studied hence the design need improvement.
The 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.
The tests indicated that 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 Shankar Septic Tank latrine in the areas where proper sewer system is not available.
If someone is interested to convert his old fashioned septic tank into EverClean Envirobic new technology (better than old designs) or need new installation for his new house he may contact via mail or phone.