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Patent Details

Indian Institute of Technology (IIT) Roorkee 
Household Modified Septic Tank 
A.A Kazmi, Sudipta Sarkar and M.K.Sharma  
Indian Institute of Technology (IIT) Roorkee 
Application type:
Applied - 2013-12-13 
Application Number:
Applied at:
Entered by:
Indian Institute of Technology (IIT) Roorkee 
The present invention also allows for an up gradation in the method of cleaning of a septic tank over the conventional method which consists of a complete withdrawal or emptying of the settled and digested sludge by enforcing a planned shutdown of the whole facility and diverting the wastewater during the period of cleaning. In this new design, the sludge withdrawal is performed by opening of a telescopic sludge withdrawal valve, which shall force the accumulated sludge, under hydraulic head, to move through a lateral pipe into a sludge withdrawal pit wherefrom the sludge shall be withdrawn for subsequent dewatering and disposal. This process of sludge removal can take place while the septic tank is in operation. The new design only allows the heavy digested sludge at the bottom of the septic tank to be discharged out into the sludge withdrawal pit. Thus, decanting of the digested sludge from the tank facilitates retaining of some quantity of sludge inside the tank which shall be beneficial for continued removal of BOD and sludge by the septic tank without needing any appreciable startup time after the cleaning is done.  

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