About the farm

Technology for production and production of biogas from manure


In order to dispose of manure is necessary not only a special place, but also a lot of money. If private owners fully use it in their gardens in large quantities, then the agrarian farms have long since begun to process valuable raw materials into biogas. The process, as it turns out, is accessible to everyone. On the technology of production and production further our article.

What is bio gas

In essence, this gas belongs to environmentally friendly sources of fuel. Its characteristics are such that it is quite similar to natural gas, which is produced by industrial companies. The scale of this resource is huge.

Biogas can be considered an alternative fuel, since its production requires animal waste, which is sufficient in agriculture. As a result of high-quality processing, a colorless gas is obtained that does not have a characteristic odor and contains about 70% of methane.

The calorific value of this fuel is quite impressive. For example, 1 cu. m. recycled gas can give as much heat as 1.5 kg of coal.
Biogas is obtained from animal waste.

Is it possible to get biogas from manure

Certainly possible. And to do it is quite simple. First of all, you need to equip a special place and equip it with the necessary reservoir. But it should be remembered that for processing it will take a lot of biomass. For reference, 1 ton of manure can turn into 100 cubic meters. m of fuel needed.

How is biogas mined:

  • The industrial scale of fuel production implies a special bioreactor. With the participation of anaerobic bacteria, the process of processing raw materials takes place in it. Fermentation takes place in the biomass and it lasts a certain time. It is important to prevent the entry of clean air. The duration of this stage directly depends on how much biomass was placed in the reactor.
  • When this stage is at its peak, there is a continuous release of gas mass. It consists of: methane - 60% or more, carbon dioxide - 35% and 5% of other substances. Often, specialists in this field find particles of hydrogen sulfide in the composition of this mixture.
  • With continuous production of gas, it is constantly removed from the bioreactor for cleaning.
  • The processing process stops and biogas begins to apply for its intended purpose, clean the installation. Waste is extracted from it, which is subsequently sent to fertilize fields.
Biogas reactor layout

Stages of receiving and recycling

Biofuels can be developed in the country or directly in their area. To do this, choose the most spacious and safe place to build structures. Then you need to build a special container of concrete. With proper arrangement and the absence of cracks, it will serve as a real reactor.

Before you start construction, you need to consider that the spent manure should be easily retrieved after processing. The solution is simple - prepare a special hole in advance, possibly with a pipe. It must be equipped so that full tightness of the whole structure is observed. It will be effective only if the gases do not evaporate.

The choice of tank size depends on how much manure appears on the farm every day. Whether it is an ordinary yard with a small number of livestock or a full-fledged farm, in any case, the bioreactor needs to be filled no more than two-thirds of its total volume. Only in this way will the fermentation process proceed properly.

After construction it is necessary to check the functionality of the installation. After loading the biomass begins processing. You can speed up the process a bit. For this purpose, a very effective method is used - heating the raw material.
  1. You can use special heating elements that are installed under the tank.
  2. Connect a small coil to the central heating system and lead it under the tank.
  3. You can directly heat the reactor with powerful electric-type heaters.

Options for installations for fuel

Each type of equipment is designed for use in a particular area. The choice is usually influenced by weather conditions. If the climate is warm - you can get by with an inexpensive, simplified installation. Under severe conditions, additional mechanisms will be needed.

Scheme for biogas production in agricultural conditions

Main types:

  1. Installation designed for manual loading, in which there is no function of mixing and heating. One of the most simple and common variations. Can be used at home. Manure processing - up to 200 kg per day.
  2. Equipment with manual loading and the possibility of mixing biomass. More efficient equipment at the same low cost.
  3. The updated system, providing for manual loading, heating manure and its mixing. More expensive equipment option with a reactor heated by a special boiler. It works on constantly developing biogas. Pocket for industrial firms.
  4. The installation, which includes - a pneumatic mass mixing mechanism, heating, a gas-holder and manual loading.
  5. Fully automated kit for agricultural and livestock firms. Expensive and most productive.

The principle of operation of the equipment

The use of all equipment is as follows:

  • Waste is loaded;
  • Tightly closed tank;
  • Mass is heated;
  • Gas mixture is released;
  • Biogas is cleaned and diverted for further use.
A simple installation for the reactor can be built independently

Scheme homemade installation

Make the entire processing structure is quite simple. Need to do:

  1. Reactor, based on the volume of manure;
  2. Special support for the reactor where waste will be collected;
  3. Valve;
  4. Tube for biogas removal;
  5. Heating mechanism
The maximum performance of a homemade device will demonstrate, subject to the observance of several rules. The first is tightness. The second is the correct heating. Third - filling the tank in the normal range.

How to use fuel in the economy

With the help of this type of fuel, which will be constantly produced on the site, it is possible to fully heat the house and some other facilities. If there is a lot of livestock, weft volume of manure will make it possible to produce enough “free” clean gas for heating even a two-story building.

The second method of use is the consumption of carbon dioxide. This is easy to do with water.

Each private owner who keeps the farm can acquire productive equipment for the production of biogas. In addition, you can design it yourself. It is necessary to take into account the climatic conditions and the volume of raw materials. As a result, the benefits of using this fuel will be very tangible.