Difference between revisions of "Biogas-Plant/C4/Maintenance-and-Repair/English"

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{| style="border-spacing:0;"
 
{| style="border-spacing:0;"
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| style="border:0.75pt solid #000000;padding:0.071cm;"| <center>'''Visual Cue'''</center>
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| style="border:0.75pt solid #000000;padding:0.176cm;"| Visual Cue
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| style="border:0.75pt solid #000000;padding:0.071cm;"| '''Narration'''
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| style="border:0.75pt solid #000000;padding:0.176cm;"| <center>Narration</center>
  
 
|-
 
|-
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| style="border:0.75pt solid #000000;padding:0.071cm;"| '''Slide 1'''
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| Slide 1
  
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'''Construction of the mixing tank'''
+
Maintenance and Repair of the Biogas plant.
 +
| style="border:0.75pt solid #000000;padding:0.176cm;"| Welcome to the Spoken Tutorial on Maintenance and Repair of the Biogas plant.
  
−
[[Image:]]
+
|-
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| style="border:0.75pt solid #000000;padding:0.071cm;"| Hello everyone and welcome to this Spoken Tutorial on construction of the mixing tank.
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| Slide 2
  
−
This is an activity to be done on Day 2.
+
Learning Objective
  
−
|-
+
We will learn:
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| '''Slide 2'''
+
  
−
'''Learning Objective'''
+
Different techniques to repair and maintain
−
We will learn :
+
  
−
* Significance and shape of the mixing tank
+
* the biogas burner and
−
* How to fabricate a mixing tank
+
* the biogas plant
  
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| In this tutorial, we will learn-
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| In this tutorial we will learn:
  
−
* Significance of the mixing tank.
+
Different techniques to maintain and repair-
−
* How to construct a mixing tank.
+
 
 +
* the Biogas plant and
 +
* the Biogas burner
  
 
|-
 
|-
−
| style="border:0.75pt solid #000000;padding:0.071cm;"|  
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| Slide 3
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| Let’s first understand-
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| Periodic partial and complete cleaning of the biogas plant is a must.
 +
 
 +
This will ensure that the biogas plant runs smoothly.
  
−
The Significance of the mixing tank and shape of the mixing tank.
+
It will also ensure efficient working of the Biogas plant for many years.
  
 
|-
 
|-
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| [[Image:]]
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| Slide
  
−
Show the dimensions on this image
+
Maintenance section
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| Mixing tank is where biomass is mixed with water and passed into the digester tank.
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| Let us first look into the maintenance section.
  
−
The mixing tank is usually cylindrical in shape.
+
|-
 +
| style="border:0.75pt solid #000000;padding:0.176cm;"| Slide
 +
 
 +
How often should one carry out maintenance of the biogas plant?
 +
| style="border-top:0.75pt solid #000000;border-bottom:0.75pt solid #666666;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| So, how often should one carry out maintenance of the Biogas plant?
  
 
|-
 
|-
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| style="border:0.75pt solid #000000;padding:0.071cm;"| Image of mixing tank[[Image:]]
+
| style="border-top:0.75pt solid #000000;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #666666;padding:0.176cm;"| Slide
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| style="border:0.75pt solid #000000;padding:0.071cm;"| A mixing tank of height 2 feet and diameter 22 inches -
+
  
−
* Has the capacity to hold 25 kgs of manure mixed in water.
+
* Always, mix the bio-waste with water in the proper ratio.
 +
* This will ensure a smooth flow of the bio-waste from the mixing tank into the Digester tank.
  
−
* However, dry manure should never be put into this tank.
+
| style="border:0.75pt solid #666666;padding-top:0cm;padding-bottom:0cm;padding-left:0.212cm;padding-right:0.212cm;"| Maintenance should be carried out on a daily basis by doing the following-
  
−
* Manure should always be mixed in equal quantity of water.  
+
* Always, mix the bio-waste with water in the proper ratio.
 +
* This will ensure smooth flow of the bio-waste from the mixing tank into the digester tank.
  
 
|-
 
|-
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| [[Image:]]
+
| style="border-top:0.75pt solid #000000;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #666666;padding:0.176cm;"| Slide
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| style="border:0.75pt solid #000000;padding:0.071cm;"| * For example, 25 kgs of manure should be mixed in 25 liters of water.
+
| style="border:0.75pt solid #666666;padding-top:0cm;padding-bottom:0cm;padding-left:0.212cm;padding-right:0.212cm;"| * If adding plant waste, crush and chop the leaves up to 1-4 cms.
−
* This will ensure free flow of the biomass into the digester tank.
+
* Do not feed too much straw into the digester tank as it is difficult to be digested.
 +
* Sticks and branches of trees should also be avoided.
  
 
|-
 
|-
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| '''Slide 3'''
+
| style="border-top:0.75pt solid #000000;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #666666;padding:0.176cm;"| Slide  
 +
| style="border:0.75pt solid #666666;padding-top:0cm;padding-bottom:0cm;padding-left:0.212cm;padding-right:0.212cm;"| * Soap, oil, chemical, insecticide and pesticides should not be added.
 +
* Soil, sand or stone should also not be added.
 +
* As they will accumulate at the base of the digester and hinder gas production.
  
−
'''Construction of the mixing tank'''.
+
|-
 +
| style="border-top:0.75pt solid #000000;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #666666;padding:0.176cm;"| Slide
 +
| style="border:0.75pt solid #666666;padding-top:0cm;padding-bottom:0cm;padding-left:0.212cm;padding-right:0.212cm;"| * Quantity of bio-waste to be supplied depends upon the size of the plant.
 +
* Too much bio-waste should not be fed into the digester.
 +
* This will lead to shorter retention time i.e. bio-waste will be in the digester tank for lesser time.
 +
* And fermentation won’t be completed.
 +
* Hence, bio-waste will come out in the slurry tank without being digested.
  
−
Step by step procedure to construct the mixing tank
+
|-
 +
| style="border-top:0.75pt solid #000000;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #666666;padding:0.176cm;"| Slide
 +
| style="border:0.75pt solid #666666;padding-top:0cm;padding-bottom:0cm;padding-left:0.212cm;padding-right:0.212cm;"| * If less bio-waste is fed into the digester, then gas production will be low.
 +
* Water condensation should be checked regularly.
 +
* As water in the pipeline will block the passage of gas.
  
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| Let’s see the construction of the mixing tank.
+
|-
 +
| style="border:0.75pt solid #000000;padding:0.176cm;"| Slide
 +
| style="border-top:0.75pt solid #666666;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| * Do so by lifting the gas pipe so that the water can run back into the digester tank.
 +
* Also keep a check that the slurry is being pumped out smoothly into the slurry tank.
 +
* Ensure that the slurry is being emptied out of the slurry tank when it is full.
  
 
|-
 
|-
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| '''Slide 4'''
+
| style="border:0.75pt solid #000000;padding:0.176cm;"|  
 +
| style="border:0.75pt solid #000000;padding:0.176cm;"| * No inflammable items like:
  
−
'''Construction of mixing tank'''
+
lighter and/or cigarettes should be brought near the outlet pipe of the dome.
  
−
For construction following items are used:  
+
|-
 +
| style="border:0.75pt solid #000000;padding:0.176cm;"| Slide
 +
| style="border:0.75pt solid #000000;padding:0.176cm;"| Another important thing to be done is that-
  
−
[[Image:]]
+
* Slurry in the digester tank should be completely removed once in three years.
  
−
[[Image:]]
+
This is usually done by the mason himself.
  
−
[[Image:]]
+
|-
 +
| style="border:0.75pt solid #000000;padding:0.176cm;"| [[Image:]]
 +
| style="border:0.75pt solid #000000;padding:0.176cm;"| As shown, keep the mixing tank and the slurry tank covered.
  
 +
This is done to ensure proper hygiene and to avoid breeding of mosquitoes near the plant.
  
−
[[Image:]]
+
|-
 +
| style="border:0.75pt solid #000000;padding:0.176cm;"| Slide
  
−
[[Image:]]
+
Repair section
  
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| For construction, following items are used-
+
Image of a technician
 +
| style="border:0.75pt solid #000000;padding:0.176cm;"| Let us now look into the Repair section.
  
−
* Weldmesh sheet- thickness 16 gauge
+
Repair of Biogas burner should always be done by a qualified technician.
−
* Newspaper
+
−
* Sand
+
−
* Cement
+
−
* Liquid waterproofing material
+
  
 
|-
 
|-
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| '''Slide 5'''
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| [[Image:]]
  
−
'''Construction of the mixing tank'''.
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| What you see here is a Biogas burner with the flame.
−
 
+
−
Step by step procedure to construct the mixing tank
+
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| The Step-by-step procedure to construct the mixing tank is as follows
+
  
 
|-
 
|-
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| [[Image:]]
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| [[Image:]]
  
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| Spread the Weldmesh sheet of 69 inches x 24 inches on the ground.
+
[[Image:]]
  
−
* Next, at a distance of 34 inches from one end of the sheet
+
[[Image:]][[Image:]]
−
* make a hole of size - 4 inch diameter with a metal cutting scissor.
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| To start repairing, first switch off the inflow of gas by turning off the knobs on-
−
 
+
−
|-
+
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| [[Image:]]
+
  
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| Now tie the loose ends, end to end with steel wire.
+
* the hose pipe and
 +
* at the burner
  
−
We need to make a cylinder like structure with diameter 22 inches and height 24 inches.
+
Doing so is very important.  
  
 
|-
 
|-
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| [[Image:]]
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| [[Image:]]
 +
| style="border:0.75pt solid #000000;padding:0.176cm;"| What you see here is the burner without the flame after the knobs have been turned off.
  
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| Note that the hole has to be at the base of the mixing tank.
+
Wait for few minutes and light the burner to ensure that gas inflow has stopped.
  
 
|-
 
|-
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| [[Image:]]
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| [[Image:]]
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| Now, place newspaper or any other paper inside the structure.
+
  
−
The paper will help hold the sand that will be filled inside this structure.
+
[[Image:]]
 +
| style="border:0.75pt solid #000000;padding:0.176cm;"| Now remove the hose pipe connected to the burner.
  
−
|-
+
Do so by loosening the Vohj clip tightened on the hose pipe connected to the burner.
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| [[Image:]]
+
  
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| Pour sand up till the brim of the structure.
+
Once it is loosened, pull out the hose pipe.
−
 
+
−
This will give firmness to the mesh while plastering the outer wall.
+
  
 
|-
 
|-
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| [[Image:]]
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| [[Image:]]
 +
| style="border:0.75pt solid #000000;padding:0.176cm;"| Now place the hose pipe near your ear to check for the sound of gas.
  
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| Now, we will plaster the outer wall of the mixing tank.
+
No sound means no gas inflow and the repair work can be carried out safely.
  
−
Prepare cement mixture as follows-
+
|-
−
* Sand- 75 kgs
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| [[Image:]]
−
* Cement-25 kgs
+
−
* Liquid waterproofing material - 50 ml thoroughly stirred in 10 ltrs of water.
+
−
* Adequate water to mix the mixture well
+
  
−
Note- that no gravel is used in this mixture.
+
[[Image:]]
  
−
|-
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| Now we start dismantling the burner.
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| [[Image:]]
+
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| Start plastering the outside wall of the mixing tank as shown here.
+
  
 
|-
 
|-
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| [[Image:]]
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| [[Image:]]
 +
| style="border:0.75pt solid #000000;padding:0.176cm;"| Next we will remove the debris in the burner.
  
−
[[Image:]]
+
As shown in the image, blow air through the hose-burner connector.
  
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| Finally smoothen the plastering using a wooden trowel.
+
This will also help to check if air is reaching smoothly to the flame ring.
−
 
+
−
The mixing tank should be left overnight for curing.
+
  
 
|-
 
|-
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| [[Image:]]
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| [[Image:]]
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| Next day, take out all the sand placed inside the mixing tank.
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| Slightly tap the burner and then turn it upside down.
  
−
This must be done carefully so as to not break the plastered outer wall of the mixing tank.
+
You can see the debris fallen from the burner.
  
 
|-
 
|-
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| [[Image:]]
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| [[Image:]]
 +
| style="border:0.75pt solid #000000;padding:0.176cm;"| In case of hard debris which cannot be removed by blowing air, a dry scrubbing pad can be used.
  
−
[[Image:]]
+
|-
 +
| style="border:0.75pt solid #000000;padding:0.176cm;"| [[Image:]]
 +
| style="border:0.75pt solid #000000;padding:0.176cm;"| To clean the flame ring, use a pin and insert it into the holes for cleaning.
  
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| Once the sand is taken out, plaster the inside wall of the mixing tank.
+
A ring with clean holes will ensure-
  
−
Prepare fresh cement mixture as was prepared for outer wall of the mixing tank.
+
* smooth flow of gas and
 +
* fuller flame
  
−
Spread half inch of this mixture on the inside wall.
+
|-
−
 
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| [[Image:]]
−
While plastering, please remember the position of the hole that is at the base.
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| A clean ring will look like this.
−
We need to break the plaster from here, later.
+
  
 
|-
 
|-
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| [[Image:]]
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| Slide
  
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| Let the plaster on the inside wall dry for 6-7 hours.
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| Apart from what is mentioned, periodic inspection of the plant is necessary.
  
−
After 6-7 hours, remove the plaster at the position of the hole by slightly tapping it.
 
  
−
|-
+
Inspection will help to locate cracks on the surface of the digester tank.
−
| style="border:0.75pt solid #000000;padding:0.071cm;"|
+
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| At this point the mixing tank is ready to be transferred to the actual plant site.
+
  
−
|-
 
−
| style="border:0.75pt solid #000000;padding:0.071cm;"|
 
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| Remember -
 
  
−
The following has to be completed on same day i.e day 2 of civil work
+
Otherwise, the generated biogas can escape into the atmosphere through these cracks.
  
−
Hence, the mason has to plan accordingly.
+
 
 +
Hence these cracks need to be sealed quickly.
  
 
|-
 
|-
−
| style="border:0.75pt solid #000000;padding:0.071cm;"|  
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| Slide
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| This brings us to the end of this tutorial.
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| Once in 3 years,
  
−
|-
+
* the mason also repaints the inner wall of the digester tank  
−
| style="border:0.75pt solid #000000;padding:0.071cm;"|
+
* by using White cement and synthetic resin adhesive mixture to seal cracks, if present.
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| Assembly of the mixing tank for the Biogas plant will be explained in a later tutorial.
+
  
 
|-
 
|-
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| '''Slide 6'''
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| Slide
 +
| style="border:0.75pt solid #000000;padding:0.176cm;"| To make this mixture use the following-
  
−
'''Summary'''
+
* 2 Ltrs of water,
 +
* 250 gms of Synthetic Resin Adhesive and
 +
* 2kgs of white cement
  
−
In this tutorial, we have learnt:
+
Mix these thoroughly. And use.
  
−
* Significance and shape of the mixing tank
+
|-
−
* How to fabricate a mixing tank
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| Slide
  
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| Let us summarize,
+
Summary
 +
| style="border:0.75pt solid #000000;padding:0.071cm;"| Let us summarize:
  
−
In this tutorial, we have learnt-
+
In this tutorial we learnt about the maintenance and repair of the Biogas plant.
  
−
* The Significance of the mixing tank.
+
|-
−
* How to construct a mixing tank.
+
| style="border:0.75pt solid #000000;padding:0.176cm;"|
 +
| style="border:0.75pt solid #000000;padding:0.071cm;"| This video was created by the Spoken Tutorial project with inputs from Rural-ICT project, IIT Bombay.
  
 
|-
 
|-
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| '''Slide 6'''
+
| style="border:0.75pt solid #000000;padding:0.176cm;"| http://spoken-tutorial.org/NMEICT-Intro
  
−
'''Acknowledgements'''
+
http://ruralict.cse.iitb.ac.in
  
−
* This video was created by Spoken Tutorial project with inputs from Rural-ICT Project, IIT Bombay.
+
| style="border:0.75pt solid #000000;padding:0.071cm;"| More information on these projects can be found at these links.
−
* More information on these projects can be found at these links
+
  
 
http://spoken-tutorial.org/NMEICT-Intro  
 
http://spoken-tutorial.org/NMEICT-Intro  
  
 
http://ruralict.cse.iitb.ac.in  
 
http://ruralict.cse.iitb.ac.in  
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| * 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 
 
−
 
  
 
|-
 
|-
−
| style="border:0.75pt solid #000000;padding:0.071cm;"|  
+
| style="border:0.75pt solid #000000;padding:0.176cm;"|  
 
| style="border:0.75pt solid #000000;padding:0.071cm;"| Pictures and technology support:
 
| style="border:0.75pt solid #000000;padding:0.071cm;"| Pictures and technology support:
  
Line 254: Line 267:
  
 
|-
 
|-
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| style="border:0.75pt solid #000000;padding:0.071cm;"|  
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| style="border:0.75pt solid #000000;padding:0.176cm;"|  
−
| style="border:0.75pt solid #000000;padding:0.071cm;"| This is Bella Tony along with the Animation team from Spoken Tutorial Project, IIT Bombay signing off.
+
| style="border:0.75pt solid #000000;padding:0.071cm;"| This is Bella Tony along with the animation team of the Spoken Tutorial Project, signing off.
  
 
Thank you for joining.
 
Thank you for joining.
  
 
|}
 
|}

Revision as of 11:35, 28 April 2016

Visual Cue
Narration
Slide 1

Maintenance and Repair of the Biogas plant.

Welcome to the Spoken Tutorial on Maintenance and Repair of the Biogas plant.
Slide 2

Learning Objective

We will learn:

Different techniques to repair and maintain

  • the biogas burner and
  • the biogas plant
In this tutorial we will learn:

Different techniques to maintain and repair-

  • the Biogas plant and
  • the Biogas burner
Slide 3 Periodic partial and complete cleaning of the biogas plant is a must.

This will ensure that the biogas plant runs smoothly.

It will also ensure efficient working of the Biogas plant for many years.

Slide

Maintenance section

Let us first look into the maintenance section.
Slide

How often should one carry out maintenance of the biogas plant?

So, how often should one carry out maintenance of the Biogas plant?
Slide
  • Always, mix the bio-waste with water in the proper ratio.
  • This will ensure a smooth flow of the bio-waste from the mixing tank into the Digester tank.
Maintenance should be carried out on a daily basis by doing the following-
  • Always, mix the bio-waste with water in the proper ratio.
  • This will ensure smooth flow of the bio-waste from the mixing tank into the digester tank.
Slide * If adding plant waste, crush and chop the leaves up to 1-4 cms.
  • Do not feed too much straw into the digester tank as it is difficult to be digested.
  • Sticks and branches of trees should also be avoided.
Slide * Soap, oil, chemical, insecticide and pesticides should not be added.
  • Soil, sand or stone should also not be added.
  • As they will accumulate at the base of the digester and hinder gas production.
Slide * Quantity of bio-waste to be supplied depends upon the size of the plant.
  • Too much bio-waste should not be fed into the digester.
  • This will lead to shorter retention time i.e. bio-waste will be in the digester tank for lesser time.
  • And fermentation won’t be completed.
  • Hence, bio-waste will come out in the slurry tank without being digested.
Slide * If less bio-waste is fed into the digester, then gas production will be low.
  • Water condensation should be checked regularly.
  • As water in the pipeline will block the passage of gas.
Slide * Do so by lifting the gas pipe so that the water can run back into the digester tank.
  • Also keep a check that the slurry is being pumped out smoothly into the slurry tank.
  • Ensure that the slurry is being emptied out of the slurry tank when it is full.
* No inflammable items like:

lighter and/or cigarettes should be brought near the outlet pipe of the dome.

Slide Another important thing to be done is that-
  • Slurry in the digester tank should be completely removed once in three years.

This is usually done by the mason himself.

[[Image:]] As shown, keep the mixing tank and the slurry tank covered.

This is done to ensure proper hygiene and to avoid breeding of mosquitoes near the plant.

Slide

Repair section

Image of a technician

Let us now look into the Repair section.

Repair of Biogas burner should always be done by a qualified technician.

[[Image:]] What you see here is a Biogas burner with the flame.
[[Image:]]

[[Image:]]

[[Image:]][[Image:]]

To start repairing, first switch off the inflow of gas by turning off the knobs on-
  • the hose pipe and
  • at the burner

Doing so is very important.

[[Image:]] What you see here is the burner without the flame after the knobs have been turned off.

Wait for few minutes and light the burner to ensure that gas inflow has stopped.

[[Image:]]

[[Image:]]

Now remove the hose pipe connected to the burner.

Do so by loosening the Vohj clip tightened on the hose pipe connected to the burner.

Once it is loosened, pull out the hose pipe.

[[Image:]] Now place the hose pipe near your ear to check for the sound of gas.

No sound means no gas inflow and the repair work can be carried out safely.

[[Image:]]

[[Image:]]

Now we start dismantling the burner.
[[Image:]] Next we will remove the debris in the burner.

As shown in the image, blow air through the hose-burner connector.

This will also help to check if air is reaching smoothly to the flame ring.

[[Image:]] Slightly tap the burner and then turn it upside down.

You can see the debris fallen from the burner.

[[Image:]] In case of hard debris which cannot be removed by blowing air, a dry scrubbing pad can be used.
[[Image:]] To clean the flame ring, use a pin and insert it into the holes for cleaning.

A ring with clean holes will ensure-

  • smooth flow of gas and
  • fuller flame
[[Image:]] A clean ring will look like this.
Slide Apart from what is mentioned, periodic inspection of the plant is necessary.


Inspection will help to locate cracks on the surface of the digester tank.


Otherwise, the generated biogas can escape into the atmosphere through these cracks.


Hence these cracks need to be sealed quickly.

Slide Once in 3 years,
  • the mason also repaints the inner wall of the digester tank
  • by using White cement and synthetic resin adhesive mixture to seal cracks, if present.
Slide To make this mixture use the following-
  • 2 Ltrs of water,
  • 250 gms of Synthetic Resin Adhesive and
  • 2kgs of white cement

Mix these thoroughly. And use.

Slide

Summary

Let us summarize:

In this tutorial we learnt about the maintenance and repair of the Biogas plant.

This video was created by the Spoken Tutorial project with inputs from Rural-ICT project, IIT Bombay.
http://spoken-tutorial.org/NMEICT-Intro

http://ruralict.cse.iitb.ac.in

More information on these projects can be found at these links.

http://spoken-tutorial.org/NMEICT-Intro

http://ruralict.cse.iitb.ac.in

Pictures and technology support:

Courtesy:

Bhagirath Rural Development foundation

Village- Zarap, Taluka- Kudal,

Dist.- Sindhudurg

This is Bella Tony along with the animation team of the Spoken Tutorial Project, signing off.

Thank you for joining.

Contributors and Content Editors

Bellatony911, Nancyvarkey

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