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Can you design a septic tank in five minutes yes it is possible kindly follow the steps described in the presentation
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Septic System Design or Septic Tanks Design can be done in various process, but most of them are critical and time taking laborious process. Here in this article I have given tutorial on how to design Septic Tank Easily within 5 minutes and Determine Septic Tank Size. Here I will also discuss some about the general Septic Tank Construction for designing of septic tank successfully you have to follow the steps given below one by one this image is taken from google search for illustration purpose)
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Step 1: Calculation of Numbers of User : In any septic system design this is a very very important step as it will determine the total capacity of the septic tank required. This is the total numbers of user who will be using the septic tank within a single day. For the calculation purpose we must consider the maximum practical numbers of user who may use the W.C. within a day. The calculation can be done very easily, like suppose there is a 4 storied building and having two families on each floor. And each family contains on an average of 5 person. Therefore the building is accommodating (2 x 4) = 8 families and again 8 families will equal to users of (8 x 5) = 40 Nos. Users. Generally in no case user number is kept less than 20 users. Therefore here we will design a septic tank for 40 Users
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Step 2: Calculation of Liquid Volume in Septic Tank : In this step we will calculate the volume of waste liquid in septic tank which will occurs due to the use of 40 user. For normal detention period It is considered in designing purpose that a septic tank requires 0.085 cu.m. of space for waste liquid of each person per day is sufficient for design, keeping in mind septic tank cleaning which will be done periodically. also a future provision should be provided, which in general is considered as 25% of the actual volume required. Therefore, Volume of Liquid @ 0.085 cu.m. per capita per day = 40x0.085 = 3.40 cu.m. Allowing a future provision of 25% extra, therefore Total Volume of Liquid = 3.40+ 25% = 4.25 cu.m.
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Step 3: Calculation of Internal Dimension Of Septic Tank : Now we have to find out the internal depth, length and breadth of the septic tank. first of all we have to consider a liquid waste depth suitably from 1m to 2m for better efficiency. if the waste volume is large then we need to consider greater depth for making the length and breadth smaller to accommodate within the land. then as we know volume = length x breadth x depth (height), therefore as we have already assumed the liquid depth so we can find the length and breadth by calculating the surface area of the liquid surface by dividing the waste volume with liquid depth Now, considering a Liquid Depth of 1.20m. Therefore, Surface Area of Liquid = (4.25/1.20) = 3.54 sq.m.
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so now this 3.54 sq.m. = Length x Breadth. Now we can calculate the length and the breadth easily by either adopting a suitable breadth according to the land available or according to some proportions like considering the length of septic tank as the twice of its breadth, L=2B etc. so we will have Area = Length x Breadth or 3.54 = L x B,or 3.54 = 2B x B,or 2B^2 = 3.54 or B = Root of (3.54/2) = 1.33m say 1.40 m Therefore, L = 2B = 2 x 1.40 = 2.80m, But more accurately the length shall be calculated like the following one, here L x B = 3.54, now as we know the value of B therefore we can obtain the the value of Length by: L x B = 3.54,or L x 1.40 = 3.54or L = (3.54/1.40) = 2.53 m say 2.60m
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But there is another process which is suitable where there breadth is restricted, in those cases we have to limit the breadth by adopting a value, and then calculate the rest by the following : Now, considering the Breadth of Septic Tank as 1.20m Therefore,Length x Breadth = 3.54 sq.m. Or Length = (3.54/Breadth) = (3.54/1.20) = 2.95m, say 3m Now this dimensions are must, but apart from this we have to provide a clear space above the liquid waste in septic tank so that the gas evolving from it can freely move and can escape through the vent pipe. For this reason we consider a gap above the liquid or free board of sufficient space, generally like the following:.
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Considering a Free Board over the Liquid surface of 300mm. Therefore, Total Internal Depth of the Septic Tank will be = 1.20 + 0.30 = 1.50m. Therefore, the Internal Dimensions of the Septic Tank are as follows : Length = 2.60m Breadth = 1.40 m Height = 1.50m Now prepare neat drawing of the above, below I have provided one, but the dimensions will not tally with the above one, it is just for reference
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CONTENTS intoduction Meaning Design consideration Working principle Health aspects Operation and maintainance Advantages disadvantages SOAK PIT
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PURPOSE The water in the septic tank isn't unadulterated, it is called dark water since it actually contains natural materials that should be sifted through A Soak Pit is a covered, permeable walled chamber that permits water to gradually drench into the ground. Pre-settled profluent from septic tank is released to the underground chamber from where it penetrates into the encompassing soil
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DESIGN A layer of sand and fine rock is spread across the base to help scatter the stream. Depth ought to be somewhere in the range of 1.5 and 4m profound, yet, never under 1.5m over the ground water table
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The Soak Pit is filled with coarse rocks and gravel. The rocks and gravel will prevent the walls from collapsing, but will still provide adequate space for the wastewater WORKING PRINCIPLE As wastewater permeates through the dirt fromthe soak pit, little particles are sifted through by the soil grid and organics are processed by miniature living being. Soak pit are most appropriate to soils with great absorptive properties; dirt, hard stuffed or rough soils are not suitable.
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WORKING PRINCIPLE As wastewater percolates through the soil from the soak pit, small particles are filtered out by the soil matrix and organics are digested by micro-organism. Soak pit are best suited to soils with good absorptive properties; clay, hard packed or rocky soils are not appropriate.
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Exactness A Soak Pit doesn't give satisfactory treatment to crude wastewater and the pit will stop up rapidly. Soak Pit ought to be utilized for releasing pre settled dark water or dim water Soak pits are fitting for rustic and rural settlements. They rely upon soil with an adequate absorptive limit. They are not fitting for regions that are inclined to flooding or have high groundwater WELLBEING ASPECTS The innovation is found underground and in this manner, people and creatures ought to have no contact with the gushing. The Soak Pit is found a protected separation from a drinking water source (in a perfect world 30m). The Soak Pit is scentless and not apparent
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MAINTANCE the gushing ought to be explained or separated well to forestall extreme development of solids. The Soak Pit ought to be avoided high-traffic regions. Particles and biomass will stop up the pit so should be cleaned or moved. For future access a removable cover ought to be utilized to seal the pit. Benefits Can be constructed and fixed with locally accessible materials. Small land region required. Power moderate. Can be constructed and kept up with locally accessible materials. Simple procedure for all clients
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DISADVANTAGES Pretreatment is required to prevent clogging, although eventual clogging is inevitable. Negatively affects soil and groundwater properties.
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Thank you for watching this presentation Kindly subscribe, like and share which will motivate me for further good presentation. In case of any quarries do not hesitate to write to me.the response shall be at the earliest Contact me 1.civilconclave @gmail.com 2. at my telegram group Civil conclave telegram group Link
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