Biogas-Plant/C3/Construction-of-the-Mixing-tank/English-timed
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Time | Narration |
00:02 | Hello everyone and welcome to this Spoken Tutorial on construction of the mixing tank. |
00:12 | This is an activity to be done on Day 2. |
00:18 | In this tutorial, we will learn- Significance of the mixing tank and how to construct a mixing tank. |
00:31 | Let’s first understand the Significance of the mixing tank and shape of the mixing tank. |
00:44 | Mixing tank is where biomass is mixed with water and passed into the digester tank. |
00:55 | The mixing tank is usually cylindrical in shape. |
01:02 | A mixing tank of height 2 feet and diameter 22 inches has the capacity to hold 25 kgs of manure mixed in water. |
01:22 | However, dry manure should never be put into this tank. |
01:29 | Manure should always be mixed in equal quantity of water. |
01:37 | For example, 25 kgs of manure should be mixed in 25 litrers of water. |
01:50 | This will ensure free flow of the biomass into the digester tank. |
01:59 | Let’s see the construction of the mixing tank. |
02:05 | For construction, following items are used- |
02:12 | Weldmesh sheet of thickness 16 gauge |
02:18 | Some Newspaper |
02:21 | Sand |
02:23 | Cement |
02:25 | And Liquid waterproofing material |
02:31 | The Step-by-step procedure to construct mixing tank is as follows- |
02:41 | Spread the Weldmesh sheet of 69 inches x 24 inches on the ground. |
02:52 | Next, at a distance of 34 inches from one end of the sheet make a hole of size 4 inch diameter with a metal cutting scissor. |
03:08 | Now tie the loose ends, end to end with steel wire. |
03:17 | We need to make a cylinder like structure with diameter 22 inches and height 24 inches. |
03:31 | Note that the hole has to be at the base of the mixing tank. |
03:40 | Now, place newspaper or any other paper inside the structure. |
03:50 | The paper will help hold the sand that will be filled inside this structure. |
03:59 | Pour sand up till the brim of the structure.This will give firmness to the mesh while plastering the outer wall. |
04:14 | Now, we will plaster the outer wall of the mixing tank. |
04:23 | Prepare cement mixture as follows- |
04:30 | Sand- 75 kgs |
04:34 | Cement-25 kgs |
04:40 | Liquid waterproofing material - 50 ml thoroughly stirred in 10 litres of water. |
04:51 | And adequate water to mix this mixture well.Note that no gravel is used in this mixture |
05:05 | Start plastering the outside wall of the mixing tank as shown here. |
05:14 | Finally smoothen the plastering using a wooden trowel. |
05:22 | The mixing tank should be left overnight for curing. |
05:29 | Next day, take out all the sand placed inside the mixing tank. |
05:38 | This must be done carefully so as to not break the plastered outer wall of the mixing tank. |
05:51 | Once the sand is taken out, plaster the inside wall of the mixing tank. |
06:02 | Prepare fresh cement mixture as was prepared for outer wall of the mixing tank. |
06:13 | Spread half inch of this mixture on the inside wall. |
06:21 | While plastering, please remeber the position of the hole that is at the base. |
06:30 | We need to break the plaster from here, later. |
06:37 | Let the plaster on the inside wall dry for 6-7 hours. |
06:48 | After 6 to 7 hours, remove the plaster at the position of the hole by slightly tapping it. |
07:00 | At this point the mixing tank is ready to be transferred to the actual plant site. |
07:12 | Remember -The following has to be completed on same day i.e day 2 of civil work. Hence, the mason has to plan accordingly. |
07:30 | This brings us to the end of this tutorial. |
07:35 | Assembly of the mixing tank for the Biogas plant will be explained in a later tutorial. |
07:45 | Let’s Summarize. In this tutorial, we learnt- Significance of the mixing tank |
07:56 | And How to construct a mixing tank |
08:01 | This video was created by Spoken Tutorial project along with inputs from Rural-ICT Project, IIT Bombay. |
08:15 | More information on this Mission is available at this given link |
08:23 | This is Bella Tony along with the Animation team from Spoken Tutorial Project, IIT Bombay signing off.
Thank you for joining. |