How to make a homemade biogas digester

One of the most popular alternatives among alternative fuels is undoubtedly the biogas. Next, we will look at how to make a homemade biogas digester The fact is that it is quite simple to do and does not require large quantities of implements.

biogas digester


- A cylindrical or square container with a lid that can be placed outdoors, preferably made of concrete but can be made of plastic or metal.

- Organic waste, such as straw, wilted leaves, vegetable peelings, vegetables and manure.

- Water.

- PVC or metal pipe.

- Fluid control valve (as used in water intakes or sink taps).

- Silicone sealant.

How to set up our biogas digester

The assembly of the biogas digester is quite simple, first we place our container in the open air and prepare our lid, so that it can be used as a kind of dosing device for the biogas that we are going to create. To do this, we open a hole in the centre of the lid with a diameter equal to the diameter of the tube we are going to use, remember that the smaller the diameter of the tube the better.

biogas digester

Once the hole has been made, insert the tube through the hole, leaving about 5 cm at the bottom of the lid so that the tube can be inserted through the hole. biogas Once the pipe is dry, we fix the pipe with sealant, and we put another layer of sealant on the edges of the cap around the pipe to avoid gas leaks. Once the sealant is dry and the tube is fixed, we place the dosing valve at one end of the tube, through this valve we will extract our gas. biogas.

Now it's time to put our homemade biogas digester. Place a considerable amount of wet organic waste in the container, approximately 3/4 of the container's capacity, and leave it uncovered in the open for about 10 days, stirring it daily with a trowel or a stick.

Once the 10 days are up, it's time to put our biogas digester. To do this, we place water inside the holes or channels where the lid will go, in this way, we will create a water seal and prevent the water from escaping. biogas. Then, we close the valve and put the lid on. Once the lid is on and sealed with water, we must wait about 10 more days. Once this time has elapsed, we are ready to use our biogas for about 40 days for heating water or for cooking.

homemade biogas digester

How it works

Organic compounds within the biogas digester home decompose in the presence of moisture and in the absence of oxygen (anaerobic fermentation). The residue of this fermentation is methane gas (biogas), a fuel commonly used in domestic kitchens around the world and which can be used for a variety of purposes.

12 thoughts on “Cómo hacer un digestor de biogas casero”

  1. elias dias mercado

    how interesting, but we must analyse the costs, which would take a biogas construction, but many congratulations and thanks for publishing this data is very interesting ....

  2. a question o.O????
    I would like to know why it is transformed into biogas, what components does the animal manure have to create biogas together with water?

  3. very interesting but I didn't understand it very well, I would like it to be more detailed in terms of half-diameters, height and other details on how the waste is collected. 

  4. I found it very interesting, but the question that arises is, "how is it cleaned?". In the diagram it says that there is an exit, but in truth the waste comes out? how? could you explain it to me in more detail?
    I've been looking for more information and there are no comments on cleanliness, well, maybe I haven't looked hard enough.

    thank you

    1. esdras gamboa

      How is it cleaned and how often is waste put in. If the biodigester is made of plastic, how do I seal the lid so that the gas does not escape?

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