Than I found one book written by Retired Superintendent Engineer with 30 years of working experience in R& B. I was in dilemma as how I overcome this knowledge gap. As many bank officials are ignorant of civil costing and estimation bankers were taken for a ride. Hence therewas tendency to inflate project cost. The bank will finnace 80% of the project cost. I was expected release installments based on stage wise construction. At that I was officer in charge of sanctioning housing loans to st.aff members. My first initiation into this subject was way back in 1984. Length, Breadth & Depth of Septic tank = 4.6m x 1.15m x 1.8mĪutomatic Calculator For Septic Tank Size Calculation:. So the area of Septic tank = 10.4/1.8 = 5.78m 2 The depth or height of Septic tank is in between 1.5m- 1.8m The length and width ratio of Septic tank is 4:1 or 2:1 In order to calculate the Septic tank size know about the standard length and width ratio of Septic tank. The Total waste generated by house in 10 days = 10 x 1040 = 10,400lts Total Waste Generated by House = 8 x 130 = 1040 lts/Day The values may change as per location and atmospheric conditions.
How to design Septic System?įor clear understanding here we designing a septic tank for 8 people in a house which get filled in 10 Days. Below are the septic tank design calculations. Septic tank Consists of Top Slab, Bottom Slab with PCC Bed, Shear walls around the tank and a top cover (Opening) to check the level of Waste water. Periodic effluent is added to the septic tank to avoid the smell. Due to the presence of Waste gases, there might be a chance of smell coming out from the pit.
Remove the sludge when it reaches up to the height of 3″ below the suck out the pipe. The settled Solids is called as Sludge and floating solids is called as scum.
Generally, if the density of solids which is more than the water is settled at the bottom of tank, if density of solids which is less than the water floats. Due to the presence of anaerobic bacteria in waste water Heavy solids are reduced to sludge and gases. Heavy Solids in waste water is settled at bottom of the tank. To avoid this, the septic tank is cased up with the bottom slab.Īll waste water from the bath, toilet, kitchen flows into the tank. Due to seepage from Septic tank, the waste water is mixed with Fresh Water sump. In the early 1990’s, the tank is constructed without bottom slab below the tank. The municipal Department suck out the wastage from Septic tank. The septic tank is drained out with the help of suck out the outlet. Wastewater flows into the tank at one end and leaves the tank on the other end as shown in the figure. Waste water coming from sewer Pipes of the house are connected to Septic tank. This tank is usually installed below 1.5m-1.8m from ground level. In order store, the Wastage or sewage for 10-30 Days Septic tank is constructed and the same is designed. Septic Tank is installed where there is no proper drainage system.
The tank which Stores a waste water of House or building is called Septic Tank. What is a septic tank? and why we use it?