Biogas-Plant/C3/Assembly-of-the-Biogas-plant/English

Visual Cue	Narration
Slide 1 Assembly of the Biogas plant.	Hello everyone. Welcome to this Spoken Tutorial on Assembly of the Biogas plant.
Slide 2 Learning Objectives We will learn how to assemble- Digester tank with the dome Mixing tank Slurry tank [[Image:]]	In this tutorial, we will learn how to assemble the following Digester tank with the dome Mixing tank Slurry tank Please note that this is an activity of Day 3.
	Let’s start
[[Image:]]	Transfer the chicken mesh dome to the actual plant site.
[[Image:]]	Place the dome on the raised wall of the digester tank.
[[Image:]] [[Image:]] [[Image:]]	Once this is done, fix the main gas pipe of 1 inch diameter, on the top of the dome. To do this-- Hold the pipe with the external thread on the top. Insert the pipes between the holes of the 3 chicken layer(s) and rotate slightly. Check if it is firmly placed. The pipe will be fixed permanently in this position when the outer wall of the dome will be plastered. Remember: the external thread on the gas pipe, will help fit the hose pipe firmly.
[[Image:]] Show arrow at the external thread	Notice the external thread at the top of the gas pipe.
	An important thing to be done, next, is the following-
[[Image:]] [[Image:]] Arrow at the inlet pipe and the base to keep mixing tank	On the side of the dome adjacent to where the mixing tank will be placed- make a firm base. These base should be 4 feet and 5 inches higher than the dome for placing the mixing tank. next, on the side of the dome facing the base of the mixing tank cut chicken mesh Use scissor to cut the mesh and make hole of 6 inch diameter. Through this hole, one end of the inlet pipe will be inserted at an angle of 45 degrees. Rest the other end of the inlet pipe at the base of the mixing tank and plaster it with cement mixture.
Slide 3 Assembly of the Biogas plant Bio-waste will reach the digester tank through this inlet pipe.	* Bio-waste will reach the digester tank through this inlet pipe.
[[Image:]] Encircle the inlet pipe	This is how the inlet pipe will look like from inside the dome.
Slide 4 Assembly of the Biogas plant Once the gas pipe is fitted : Plaster the dome from outside	Once the gas pipe is fitted, we need to plaster the dome from outside.
Slide 5 Assembly of the Biogas plant An interesting fact - The dome is plastered twice Both coats of plaster have different ratio of sand and cement.	An interesting fact - The dome is plastered twice and both coats of plaster have different ratio of sand and cement.
[[Image:]] [[Image:]][[Image:]]	For first coat of plastering, use the following- Sand- 200 kgs Cement- 100 kgs Liquid waterproofing material- 150 ml mixed in 20 Ltrs of water Adequate amount of water
[[Image:]]	What you see here, is the mason using the first coat of plaster, on the dome.
Slide 6 Assembly of the Biogas plant Before entirely plastering the outer wall of the dome do the following	Before entirely plastering the outer wall of the dome -
[[Image:]]	* The base of the Digester tank has to be plastered for the second time.
Slide 7 Assembly of the Biogas plant Ratio of cement mixture to be used is- [[Image:]]	Ratio of cement mixture to be used is-
[[Image:]]	* Sand -90 kgs Cement -50 kgs Liquid waterproofing material- 100 ml mixed in 15 Ltrs of water Adequate amount of water as mentioned earlier. What you see here, is the mason adding Liquid waterproofing material to the cement mixture.
[[Image:]]	Remember - The thickness of the layer of the plaster should be about 3 inches only.
Show pictorial (graphic) image	Next comes the attaching of the walls of the slurry tank with the dome. Hole of the slurry tank has to be 6 inches lower than the dome. This will ensure free flow of slurry into the slurry tank.
[[Image:]] Animation for interlocking	Place the slanting wall(s) of the slurry tank at either sides of the entrance to the dome. With the hook, interlock the excess chicken mesh - at the base of the dome and at the edge of the slurry tank wall
[[Image:]]	Carefully, tighten the chicken mesh securely, so as to join the walls to the dome.
[[Image:]]	To seal the joints, use cement mixture with adequate amount of water.
[[Image:]] [[Image:]]	Apply this mixture carefully so that there are no gaps at all.
[[Image:]]	Please note that at this point, we have used 3 of the 7 walls for the slurry tank.
[[Image:]]	The plastered dome should now be left for 6-8 hours for curing.
	Leaving the dome for curing, we will now attach the mixing tank. As mentioned earlier- Mixing tank will be placed 4 feet and 5 inches higher than the dome to avoid water logging.
[[Image:]] Show arrow at the hole [[Image:]]	The mixing tank is connected to the digester tank via the Inlet pipe. Before placing, check the hole at the base of the mixing tank. The hole should be placed just in front of the inlet pipe of 6 inch diameter. Remember - This inlet pipe of 6 inch diameter has been already inserted inside the dome at an angle of 45 degrees.
[[Image:]]	For the hole of the mixing tank and the inlet pipe to be in line with each other
Slide 8 Assembly of the Biogas plant Now do the following- [[Image:]]	Do the following: Place three bricks around these two and plaster it with cement.
[[Image:]]	After plastering, leave it for curing overnight.
[[Image:]]	This is how, it will look in a functional Biogas plant -
Slide 9 Assembly of the Biogas plant Plaster the outer wall of the dome for second time and Inner wall of the dome as well.	Now, plaster the entire outer dome wall for the second time. And the inner wall of the dome as well.
[[Image:]]	Prepare the cement mixture as follows- Sand- 180 kgs Cement- 100 kgs Liquid waterproofing material- 250 ml mixed in 20 Ltrs of water Adequate amount of water
[[Image:]]	Spread this mixture evenly on the outer wall of the dome.
[[Image:]]	And on the inner wall of the dome, as well.
[[Image:]] [[Image:]]	Smoothen out the plaster by using the wooden trowel. Leave the whole structure for curing for 17 days.
	This brings us to the end of Day 3
	On day 4, we will do the following-
[[Image:]] [[Image:]]	* Dig two rectangular pits adjacent to the side walls of the lower tank. Dimensions would be 1foot 5 inches length, 1 foot and 5 inches width and height 2 ft Dig another pit at the front of the lower tank as shown in the image. Dimensions would be 10 inches of length, 28 inches of width and 2 feet of height Lay foundation on both the adjacent sides and the front side of the lower tank using gravel, cement and sand mixture. The gravel, sand and cement is mixed in the same proportion as mentioned previously. Now, join the four walls of the upper slurry tank. Plaster the edges of the walls with cement. The wall with the hole should face the fields This will help the slurry to flow out smoothly through the hole.
[[Image:]]	Coming back on the dome- Place approximately 25 jute gunny bags on the dome. Twice a day, start spraying water on the dome.
Slide 10 Assembly of the Biogas plant Spray as much is required to wet the outer wall of the dome Jute bags placed on the outer wall help to retain the water.	* Spray as much is required to wet the outer wall of the dome. Jute bags placed on the outer wall help to retain the water. This will keep the dome wet for longer hours.
[[Image:]]	* Lastly, the entire dome should be covered with a plastic sheet held between 2- 4 pillars.
Slide 11 Assembly of the Biogas plant Plastic sheet will protect the dome from too much sunlight	* Plastic sheet will protect the dome from too much sunlight Thereby avoiding too much drying of the dome
	This brings us to the end of Day 4
	On the 15th day of curing-
	Make a mixture of 2 Ltrs of water, 250 gms of Synthetic Resin Adhesive and 2kgs of white cement. Apply this mixture on the inside of the digester tank, to seal crack(s), if any.
[[Image:]]	At this point, the civil work of the biogas plant is completed. We will now learn to connect the main gas pipe to the kitchen.
[[Image:]]	Connect the main gas pipe from the digester tank to the main gas control valve, as shown here. The joint between the main gas pipe and gas control valve should be perfectly air-tight. Otherwise, gas leakage from this joint cannot be stopped easily.
[[Image:]]	From the main gas control valve, we have to connect a gas conveyer pipe.
Slide 12 Assembly of the Biogas plant The joint between the main gas and gas control valve should be perfectly air-tight	Once again, connect these using a straight joint and ensure it is air-tight.
[[Image:]]	The gas conveyer pipe extends all the way to the kitchen.
[[Image:]]	Inside the kitchen, connect the safety valve to the gas conveyer pipe using a straight joint. Connect another straight joint on the other end of the safety valve.
[[Image:]]	Then connect the rubber hose pipe to the other end of the water outlet pipe. Make sure that all the joints are air-tight.
[[Image:]]	Lastly, connect the rubber hose to the stove. After all the connections are made, the biogas plant is ready for use.
[[Image:]]	After 17 days of total curing time, raw materials can be put into the biogas plant.
For the Animator Create a background image by merging both the images given below. [[Image:]]	Initial production of biogas will take about 6 days. After that, it will be a regular daily production.
[[Image:]]	Now, to check whether Biogas has been produced ? Do the following- Ensure that both the safety valves are in open position for the gas to be conveyed. Light the burner and check the flame for production of the biogas.
Slide 13 Assembly of the Biogas plant How to avoid water condensation ?	Another issue is water condensation. So, how can water condensation be avoided ?
[[Image:]] The pipe from the dome towards the kitchen has to be shown in red	The gas conveyer pipe from the dome to towards the kitchen should be always in an upward direction. If so, water accumulation inside the conveyer pipe is negligible.
	This brings us to the end of this tutorial about laying the foundation of a Biogas plant. The Repair and Maintenance part of the Biogas plant will be explained in next tutorial under the same series
Slide 14 Summary We will learn how to assemble- Digester tank with the dome Mixing tank Slurry tank	Let’s Summarize- In this tutorial, we will learn about We will learn how to assemble the following- Digester tank with the dome Mixing tank Slurry tank
Slide 15 Acknowledgements This video was created by Spoken Tutorial project with inputs from Rural-ICT Project, IIT Bombay. More information on these projects can be found at these links http://spoken-tutorial.org/NMEICT-Intro http://ruralict.cse.iitb.ac.in	* This video was created by Spoken Tutorial project with inputs from Rural-ICT Project, IIT Bombay. More information on these projects can be found at these links http://spoken-tutorial.org/NMEICT-Intro http://ruralict.cse.iitb.ac.in
Acknowledgement	Pictures and technology support: Courtesy: Bhagirath Rural Development Foundation Village- Zarap, Taluka- Kudal, Dist.- Sindhudurg
	This is Bella Tony along with the Animation team from Spoken Tutorial Project, IIT Bombay signing off. Thank you for joining.

Contributors and Content Editors

Bellatony911, Nancyvarkey