Difference between revisions of "Biogas-Plant/C3/Assembly-of-the-Biogas-plant/English-timed"

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{| border =1
 
{| border =1
−
| Time
+
|'''Time'''
−
| Narration  
+
|'''Narration'''
  
 
|-  
 
|-  
 
|  00:01
 
|  00:01
−
|  Hello everyone and Welcome to this Spoken Tutorial on Assembly of the Biogas plant.  
+
|  Hello everyone and welcome to this '''Spoken Tutorial''' on '''Assembly of the Biogas plant'''.  
  
 
|-  
 
|-  
 
|  00:10
 
|  00:10
−
|  In this tutorial, we will learn how to assemble the following  
+
|  In this tutorial, we will learn how to assemble the following-
  
 
|-  
 
|-  
 
| 00:16
 
| 00:16
−
| Digester tank with the dome  
+
| '''digester tank''' with the dome,
  
 
|-  
 
|-  
 
| 00:18
 
| 00:18
−
| Mixing tank and
+
| mixing tank and
  
 
|-  
 
|-  
 
| 00:21
 
| 00:21
−
| Slurry tank  
+
| '''slurry tank'''.
  
 
|-  
 
|-  
 
| 00:23
 
| 00:23
−
|Please note that this is an activity of Day 3.  
+
|Please note that this is an activity of day-3.  
  
 
|-  
 
|-  
 
| 00:30
 
| 00:30
−
|  Let us start  
+
|  Let us start.
  
 
|-  
 
|-  
 
|  00:32
 
|  00:32
−
|  Transfer the chicken mesh dome to the actual plant site.  
+
|  Transfer the '''chicken mesh''' dome to the actual '''plant''' site.  
  
 
|-  
 
|-  
Line 41: Line 41:
 
|-  
 
|-  
 
|  00:43
 
|  00:43
−
|  Once this is done, fix the main gas pipe of 1 inch diameter, on the top of the dome.  
+
|  Once this is done, fix the main gas pipe of 1 inch diameter on the top of the dome.  
  
 
|-  
 
|-  
 
| 00:53  
 
| 00:53  
−
|To do this-- Hold the pipe with the external thread on the top.  
+
|To do this, hold the pipe with the external thread on the top.  
  
 
|-  
 
|-  
 
| 01:00
 
| 01:00
−
|Insert the pipe between the holes of the 3 chicken layer(s) and rotate slightly.  
+
|Insert the pipe between the holes of the 3 '''chicken layer(s)''' and rotate slightly.  
  
 
|-  
 
|-  
Line 61: Line 61:
 
|-  
 
|-  
 
| 01:24
 
| 01:24
−
|Remember: the external thread on the gas pipe, will help fit the hose pipe firmly.  
+
|Remember: the external thread on the gas pipe will help fit the hose pipe firmly.  
  
 
|-  
 
|-  
Line 69: Line 69:
 
|-  
 
|-  
 
|  01:38
 
|  01:38
−
|  An important thing to be done, next, is the following-  
+
|  An important thing to be done next is the following-  
  
 
|-  
 
|-  
 
|  01:44
 
|  01:44
−
|  On the side of the dome adjacent to where the mixing tank will be placed-
+
|  On the side of the dome, adjacent to where the mixing tank will be placed,
  
 
|-  
 
|-  
 
| 01:51
 
| 01:51
−
| Make a firm base, this base should be 4 feet and 5 inches higher than the dome for placing the mixing tank.  
+
| make a firm base. This base should be 4 feet and 5 inches higher than the dome for placing the mixing tank.  
  
 
|-  
 
|-  
 
| 02:06
 
| 02:06
−
| Next, on the side of the dome facing the base of the mixing tank cut chicken mesh  
+
| Next, on the side of the dome facing the base of the mixing tank, cut '''chicken mesh'''.
  
 
|-  
 
|-  
Line 117: Line 117:
 
|-  
 
|-  
 
| 03:42
 
| 03:42
−
| Sand- 200 kgs  
+
| sand- 200 kgs,
  
 
|-  
 
|-  
 
| 03:45
 
| 03:45
−
| Cement- 100 kgs  
+
| cement- 100 kgs,
  
 
|-  
 
|-  
 
| 03:50
 
| 03:50
−
| Liquid waterproofing material- 150 ml thoroughly mixed in 20 Ltrs of water and adequate amount of water  
+
| liquid waterproofing material- 150 ml, thoroughly mixed in 20 liters of water and adequate amount of water.
  
 
|-  
 
|-  
 
|  04:04
 
|  04:04
−
|  What you see here, is the mason using the first coat of plaster, on the dome.  
+
|  What you see here is the mason using the first coat of plaster on the dome.  
  
 
|-  
 
|-  
 
|  04:13
 
|  04:13
−
|  Before entirely plastering the outer wall of the dome - the base of the Digester tank has to be plastered for the second time.  
+
|  Before entirely plastering the outer wall of the dome,  the base of the digester tank has to be plastered for the second time.  
  
 
|-  
 
|-  
Line 141: Line 141:
 
|-  
 
|-  
 
| 04:33
 
| 04:33
−
|Sand -90 kgs  
+
|sand -90 kgs,
  
 
|-  
 
|-  
 
| 04:37
 
| 04:37
−
| Cement -50 kgs  
+
| cement -50 kgs,
  
 
|-  
 
|-  
 
| 04:42
 
| 04:42
−
| Liquid waterproofing material- 100 ml mixed in 15 Ltrs of water and  
+
| liquid waterproofing material- 100 ml, mixed in 15 litres of water and  
  
 
|-  
 
|-  
 
| 04:53
 
| 04:53
−
|Adequate amount of water as mentioned earlier.  
+
|adequate amount of water as mentioned earlier.  
  
 
|-  
 
|-  
 
| 05:00
 
| 05:00
−
|What you see here, is the mason adding Liquid waterproofing material to the cement mixture.  
+
|What you see here is the mason adding liquid waterproofing material to the cement mixture.  
  
 
|-  
 
|-  
 
| 05:11
 
| 05:11
−
|  Remember - The thickness of the layer of the plaster should be about 3 inches only.  
+
|  Remember - the thickness of the layer of the plaster should be about 3 inches only.  
  
 
|-  
 
|-  
 
|  05:22
 
|  05:22
−
|  Next comes the attaching of the walls of the slurry tank with the dome.  
+
|  Next comes the attaching of the walls of the '''slurry tank''' with the dome.  
  
 
|-  
 
|-  
 
| 05:30
 
| 05:30
−
|Hole of  the Slurry tank has to be 6 inches lower than the dome.  
+
|Hole of  the slurry tank has to be 6 inches lower than the dome.  
  
 
|-  
 
|-  
Line 181: Line 181:
 
|-  
 
|-  
 
| 05:58
 
| 05:58
−
| With the hook, interlock the excess chicken mesh at the base of the dome and at the edge of the slurry tank wall  
+
| With the hook, interlock the excess '''chicken mesh''' at the base of the dome and at the edge of the slurry tank wall.
  
 
|-  
 
|-  
 
|  06:12
 
|  06:12
−
|  Carefully, tighten the chicken mesh securely, so as to join the walls to the dome.  
+
|  Carefully tighten the chicken mesh securely so as to join the walls to the dome.  
  
 
|-  
 
|-  
Line 209: Line 209:
 
|-  
 
|-  
 
| 07:15
 
| 07:15
−
|As mentioned earlier- Mixing tank will be placed 4 feet and 5 inches  higher than the dome  to avoid water logging.  
+
|As mentioned earlier, mixing tank will be placed 4 feet and 5 inches  higher than the dome  to avoid water logging.  
  
 
|-  
 
|-  
 
| 07:29
 
| 07:29
−
|  The mixing tank is connected to the digester tank via the Inlet pipe.  
+
|  The mixing tank is connected to the digester tank via the inlet pipe.  
  
 
|-  
 
|-  
Line 221: Line 221:
 
|-  
 
|-  
 
| 07:44
 
| 07:44
−
|The hole should be placed just in front of the inlet pipe of 6 inch diameter.
+
|The hole should be placed just in front of the inlet pipe of 6 inches diameter.
  
 
|-  
 
|-  
 
| 07:52
 
| 07:52
−
|Remember - This inlet pipe of 6 inch diameter has been already inserted inside the dome at an angle of 45 degrees.  
+
|Remember - this inlet pipe of 6 inches diameter has been already inserted inside the dome at an angle of 45 degrees.  
  
 
|-  
 
|-  
Line 233: Line 233:
 
|-  
 
|-  
 
| 08:20
 
| 08:20
−
|Place three bricks around these two and plaster it with cement.  
+
|place three bricks around these two and plaster it with cement.  
  
 
|-  
 
|-  
Line 241: Line 241:
 
|-  
 
|-  
 
| 08:35
 
| 08:35
−
|  This is how it will look  in a functional Biogas plant -
+
|  This is how it will look  in a functional biogas plant. 
  
 
|-  
 
|-  
 
|  08:43
 
|  08:43
−
|  Now, plaster the entire outer dome wall for the second time and the inner wall of the dome.  
+
|  Now, plaster the entire outer dome wall for the second time and the inner wall of the dome as well.  
  
 
|-  
 
|-  
Line 253: Line 253:
 
|-  
 
|-  
 
| 09:03
 
| 09:03
−
| Sand- 180 kgs  
+
| sand- 180 kgs,
  
 
|-  
 
|-  
 
| 09:06
 
| 09:06
−
| Cement- 100 kgs  
+
| cement- 100 kgs,
  
 
|-  
 
|-  
 
| 09:11
 
| 09:11
−
|Liquid waterproofing material- 250 ml mixed in 20 Ltrs of water  
+
|liquid waterproofing material 250 ml, mixed in 20 liters of water  
  
 
|-  
 
|-  
 
| 09:21
 
| 09:21
−
|And adequate amount of water  
+
|and adequate amount of water.
  
 
|-  
 
|-  
 
|  09:26
 
|  09:26
−
|  Spread this mixture evenly on the outer wall of the dome.
+
|  Spread this mixture evenly on the outer wall of the dome  
  
 
|-  
 
|-  
 
| 09:33
 
| 09:33
−
|  And on the inner wall of the dome, as well.  
+
|  and on the inner wall of the dome as well.  
  
 
|-  
 
|-  
Line 285: Line 285:
 
|-  
 
|-  
 
|  09:54
 
|  09:54
−
|  This brings us to the end of Day 3  
+
|  This brings us to the end of day-3.
  
 
|-  
 
|-  
 
|  10:00
 
|  10:00
−
| On day 4, we will do the following-  
+
| On day-4, we will do the following-  
  
 
|-  
 
|-  
Line 297: Line 297:
 
|-  
 
|-  
 
| 10:15
 
| 10:15
−
| The dimensions would be 1 foot and 5 inches of length, 1 foot and 5 inches of width and 2 feet of height
+
| The dimensions would be 1 foot and 5 inches of length, 1 foot and 5 inches of width and 2 feet of height.
  
 
|-  
 
|-  
 
| 10:32
 
| 10:32
−
| Dig another pit  at the front of the lower tank as shown here  
+
| Dig another pit  at the front of the lower tank as shown here.
  
 
|-  
 
|-  
 
| 10:41
 
| 10:41
−
|The dimensions would be,  10 inches of  length, 28 inches of width and 2 feet of height
+
|The dimensions would be- 10 inches of  length, 28 inches of width and 2 feet of height.
  
 
|-  
 
|-  
Line 325: Line 325:
 
|-  
 
|-  
 
| 11:45
 
| 11:45
−
| The wall with the hole should face the fields, this will help the slurry to flow out smoothly through the hole.  
+
| The wall with the hole should face the fields. This will help the slurry to flow out smoothly through the hole.  
  
 
|-  
 
|-  
 
|  11:59
 
|  11:59
−
|  Coming back to the dome, Place approximately 25 jute gunny bags on the dome.  
+
|  Coming back to the dome, place approximately 25 jute gunny bags on the dome.  
  
 
|-  
 
|-  
Line 349: Line 349:
 
|-  
 
|-  
 
|  12:43
 
|  12:43
−
|  Lastly, the entire dome should be covered with the plastic sheet held between 2- 4 pillars.  
+
|  Lastly, the entire dome should be covered with the plastic sheet held between 2 - 4 pillars.  
  
 
|-  
 
|-  
 
| 12:56
 
| 12:56
−
| This plastic sheet will protect the dome from too much sunlight thereby avoiding too much drying of the dome
+
| This plastic sheet will protect the dome from too much sunlight, thereby avoiding too much drying of the dome.
  
 
|-  
 
|-  
 
|  13:11
 
|  13:11
−
|  This brings us to the end of Day 4  
+
|  This brings us to the end of day-4.
  
 
|-  
 
|-  
Line 365: Line 365:
 
|-  
 
|-  
 
|  13:22
 
|  13:22
−
|  Make a mixture of  2 Litres of water,  
+
|  make a mixture of  2 litres of water,  
  
 
|-  
 
|-  
 
| 13:29
 
| 13:29
−
|250 gms of Synthetic Resin Adhesive and 2kgs of white cement.  
+
|250 gms of '''Synthetic Resin Adhesive''' and 2kgs of '''white cement'''.  
  
 
|-  
 
|-  
 
| 13:41
 
| 13:41
−
|Apply this mixture on the inside of the digester tank, to seal crack(s), if any.  
+
|Apply this mixture on the inside of the digester tank to seal crack(s), if any.  
  
 
|-  
 
|-  
Line 397: Line 397:
 
|-  
 
|-  
 
|  14:46
 
|  14:46
−
|  From the main gas control valve, we have to connect a gas conveyer pipe.  
+
|  From the main gas control valve, we have to connect a gas conveyor pipe.  
  
 
|-  
 
|-  
Line 405: Line 405:
 
|-  
 
|-  
 
|  15:11
 
|  15:11
−
|  The gas conveyer pipe extends all the way to the kitchen.  
+
|  The gas conveyor pipe extends all the way to the kitchen.  
  
 
|-  
 
|-  
 
|  15:20
 
|  15:20
−
|  Inside the kitchen, connect the safety valve to the gas conveyer pipe using a straight joint.  
+
|  Inside the kitchen, connect the safety valve to the gas conveyor pipe using a straight joint.  
  
 
|-  
 
|-  
Line 441: Line 441:
 
|-  
 
|-  
 
|  16:38
 
|  16:38
−
|  Now how to check whether Biogas has been produced ? do the following
+
|  Now, to check whether biogas has been produced, do the following.
  
 
|-  
 
|-  
Line 453: Line 453:
 
|-  
 
|-  
 
|  17:10
 
|  17:10
−
|  Another issue is water condensation , So how can water condensation can be avoided
+
|  Another issue is water condensation. So, how can water condensation be avoided?
  
 
|-  
 
|-  
 
|  17:23
 
|  17:23
−
|  The gas conveyer pipe from the dome towards the kitchen should be always in an upward direction.  
+
|  The gas conveyor pipe from the dome towards the kitchen should be always in an upward direction.  
  
 
|-  
 
|-  
 
| 17:35
 
| 17:35
−
|If so, water accumulation inside the conveyer pipe is negligible.  
+
|If so, water accumulation inside the conveyor pipe is negligible.  
  
 
|-  
 
|-  
 
|  17:44
 
|  17:44
−
|  This brings us to the end of this tutorial   
+
|  This brings us to the end of this tutorial.  
  
 
|-  
 
|-  
 
|  17:50
 
|  17:50
−
|  Let us Summarize-
+
|  Let us Summarize.
  
 
|-  
 
|-  
 
| 17:54
 
| 17:54
−
|  In this tutorial, we will learn how to assemble the following
+
|  In this tutorial, we learnt how to assemble the following.
  
 
|-  
 
|-  
Line 481: Line 481:
 
|-  
 
|-  
 
| 18:06
 
| 18:06
−
| Mixing tank and
+
|mixing tank and
  
 
|-  
 
|-  
 
| 18:09
 
| 18:09
−
| Slurry tank
+
|the slurry tank.
  
 
|-  
 
|-  
 
| 18:13
 
| 18:13
−
| This video was created by Spoken Tutorial Project with inputs from Rural-ICT Project, IIT Bombay
+
|This video was created by '''Spoken Tutorial''' Project with inputs from '''Rural-ICT Project, IIT Bombay'''.
−
 
+
 
|-  
 
|-  
 
| 18:25
 
| 18:25
−
|More information on these projects can be found at this links
+
|More information on these projects can be found at these links.
  
 
|-  
 
|-  
 
|  18:33
 
|  18:33
−
| This is Bella Tony along with the Animation team from Spoken Tutorial Project, IIT Bombay signing off.  
+
|This is Bella Tony along with the animation team of '''Spoken Tutorial Project, IIT Bombay,''' signing off. Thank you for joining.  
−
 
+
−
Thank you for joining.  
+
  
 
|}
 
|}

Latest revision as of 18:13, 23 March 2017

Time Narration
00:01 Hello everyone and welcome to this Spoken Tutorial on Assembly of the Biogas plant.
00:10 In this tutorial, we will learn how to assemble the following-
00:16 digester tank with the dome,
00:18 mixing tank and
00:21 slurry tank.
00:23 Please note that this is an activity of day-3.
00:30 Let us start.
00:32 Transfer the chicken mesh dome to the actual plant site.
00:38 Place the dome on the raised wall of the digester tank.
00:43 Once this is done, fix the main gas pipe of 1 inch diameter on the top of the dome.
00:53 To do this, hold the pipe with the external thread on the top.
01:00 Insert the pipe between the holes of the 3 chicken layer(s) and rotate slightly.
01:10 Check if it is firmly placed.
01:13 The pipe will be fixed permanently in this position when the outer wall of the dome will be plastered.
01:24 Remember: the external thread on the gas pipe will help fit the hose pipe firmly.
01:33 Notice the external thread at the top of the gas pipe.
01:38 An important thing to be done next is the following-
01:44 On the side of the dome, adjacent to where the mixing tank will be placed,
01:51 make a firm base. This base should be 4 feet and 5 inches higher than the dome for placing the mixing tank.
02:06 Next, on the side of the dome facing the base of the mixing tank, cut chicken mesh.
02:16 Use a scissor to cut the mesh and make a hole of 6 inches diameter.
02:27 Through this hole, one end of the inlet pipe will be inserted at an angle of 45 degrees.
02:38 Rest the other end of the inlet pipe at the base of the mixing tank and plaster it with cement mixture.
02:52 Bio-waste will reach the digester tank through this inlet pipe.
03:00 This is how the inlet pipe will look like from inside the dome.
03:09 Once the gas pipe is fitted, we need to plaster the dome from outside.
03:18 An interesting fact is that the dome is plastered twice and both coats of plaster have different ratio of sand and cement.
03:35 For first coat of plastering, use the following-
03:42 sand- 200 kgs,
03:45 cement- 100 kgs,
03:50 liquid waterproofing material- 150 ml, thoroughly mixed in 20 liters of water and adequate amount of water.
04:04 What you see here is the mason using the first coat of plaster on the dome.
04:13 Before entirely plastering the outer wall of the dome, the base of the digester tank has to be plastered for the second time.
04:27 Ratio of cement mixture to be used is-
04:33 sand -90 kgs,
04:37 cement -50 kgs,
04:42 liquid waterproofing material- 100 ml, mixed in 15 litres of water and
04:53 adequate amount of water as mentioned earlier.
05:00 What you see here is the mason adding liquid waterproofing material to the cement mixture.
05:11 Remember - the thickness of the layer of the plaster should be about 3 inches only.
05:22 Next comes the attaching of the walls of the slurry tank with the dome.
05:30 Hole of the slurry tank has to be 6 inches lower than the dome.
05:38 This will ensure free flow of slurry into the slurry tank.
05:47 Place the slanting wall(s) of the slurry tank at either sides of the entrance to the dome.
05:58 With the hook, interlock the excess chicken mesh at the base of the dome and at the edge of the slurry tank wall.
06:12 Carefully tighten the chicken mesh securely so as to join the walls to the dome.
06:23 To seal the joints, use cement mixture with adequate amount of water.
06:34 Apply this mixture carefully so that there are no gaps at all.
06:44 Please note that at this point, we have used 3 of the 7 walls for the slurry tank.
06:57 The plastered dome should now be left for 6-8 hours for curing.
07:06 Leaving the dome for curing, we will now attach the mixing tank.
07:15 As mentioned earlier, mixing tank will be placed 4 feet and 5 inches higher than the dome to avoid water logging.
07:29 The mixing tank is connected to the digester tank via the inlet pipe.
07:37 Before placing, check the hole at the base of the mixing tank.
07:44 The hole should be placed just in front of the inlet pipe of 6 inches diameter.
07:52 Remember - this inlet pipe of 6 inches diameter has been already inserted inside the dome at an angle of 45 degrees.
08:08 For the hole of the mixing tank and the inlet pipe to be in line with each other, do the following-
08:20 place three bricks around these two and plaster it with cement.
08:29 After plastering, leave it for curing overnight.
08:35 This is how it will look in a functional biogas plant.
08:43 Now, plaster the entire outer dome wall for the second time and the inner wall of the dome as well.
08:57 Prepare the cement mixture as follows-
09:03 sand- 180 kgs,
09:06 cement- 100 kgs,
09:11 liquid waterproofing material 250 ml, mixed in 20 liters of water
09:21 and adequate amount of water.
09:26 Spread this mixture evenly on the outer wall of the dome
09:33 and on the inner wall of the dome as well.
09:39 Smoothen out the plaster by using the wooden trowel.
09:46 Leave the whole structure for curing for 17 days.
09:54 This brings us to the end of day-3.
10:00 On day-4, we will do the following-
10:06 Dig two rectangular pits adjacent to the side walls of the lower tank.
10:15 The dimensions would be 1 foot and 5 inches of length, 1 foot and 5 inches of width and 2 feet of height.
10:32 Dig another pit at the front of the lower tank as shown here.
10:41 The dimensions would be- 10 inches of length, 28 inches of width and 2 feet of height.
10:58 Lay foundation on both the adjacent sides and the front side of the lower tank using gravel, cement and sand mixture.
11:18 The gravel, sand and cement is mixed in the same proportion as mentioned previously.
11:30 Now, join the four walls of the upper slurry tank.
11:37 Plaster the edges of the walls with cement.
11:45 The wall with the hole should face the fields. This will help the slurry to flow out smoothly through the hole.
11:59 Coming back to the dome, place approximately 25 jute gunny bags on the dome.
12:11 Twice a day, start spraying water on the dome.
12:18 Spray as much is required to wet the outer wall of the dome.
12:26 Jute bags placed on the outer wall help to retain the water.
12:35 This will keep the dome wet for longer hours.
12:43 Lastly, the entire dome should be covered with the plastic sheet held between 2 - 4 pillars.
12:56 This plastic sheet will protect the dome from too much sunlight, thereby avoiding too much drying of the dome.
13:11 This brings us to the end of day-4.
13:17 On the 15th day of curing-
13:22 make a mixture of 2 litres of water,
13:29 250 gms of Synthetic Resin Adhesive and 2kgs of white cement.
13:41 Apply this mixture on the inside of the digester tank to seal crack(s), if any.
13:52 At this point, the civil work of the biogas plant is completed.
14:00 We will now learn to connect the main gas pipe to the kitchen.
14:07 Connect the main gas pipe from the digester tank to the main gas control valve, as shown here.
14:22 The joint between the main gas pipe and gas control valve should be perfectly air-tight.
14:35 Otherwise, gas leakage from this joint cannot be stopped easily.
14:46 From the main gas control valve, we have to connect a gas conveyor pipe.
14:57 Once again, connect these using a straight joint and ensure it is air-tight.
15:11 The gas conveyor pipe extends all the way to the kitchen.
15:20 Inside the kitchen, connect the safety valve to the gas conveyor pipe using a straight joint.
15:33 Connect another straight joint on the other end of the safety valve.
15:43 Make sure that all the joints are air-tight.
15:50 Lastly, connect the rubber hose to the stove.
15:58 After all the connections are made, the biogas plant is ready for use.
16:09 After 17 days of total curing time, raw materials can be put into the biogas plant.
16:23 Initial production of biogas will take about 6 days.
16:31 After that, it will be a regular daily production.
16:38 Now, to check whether biogas has been produced, do the following.
16:48 Ensure that both the safety valves are in open position for the gas to be conveyed.
17:00 Light the burner and check the flame for production of the biogas.
17:10 Another issue is water condensation. So, how can water condensation be avoided?
17:23 The gas conveyor pipe from the dome towards the kitchen should be always in an upward direction.
17:35 If so, water accumulation inside the conveyor pipe is negligible.
17:44 This brings us to the end of this tutorial.
17:50 Let us Summarize.
17:54 In this tutorial, we learnt how to assemble the following.
18:02 Digester tank with the dome
18:06 mixing tank and
18:09 the slurry tank.
18:13 This video was created by Spoken Tutorial Project with inputs from Rural-ICT Project, IIT Bombay.
18:25 More information on these projects can be found at these links.
18:33 This is Bella Tony along with the animation team of Spoken Tutorial Project, IIT Bombay, signing off. Thank you for joining.

Contributors and Content Editors

PoojaMoolya, Pratik kamble, Sandhya.np14

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