Biogas plants / Biogas plants Ecos

BIOGAS – energy from organic substances

Production of energy from biogas, as a renewable source of energy is an important one, as it contributes to the reduction of greenhouse gas emissions into the atmosphere.

Biogas is the product of methane bacteria metabolic processes. It is therefore created by the boiling or the decomposition of organic substances without the presence of oxygen. Under the influence of enzymes and yeast, the initial mass decomposes into simpler compounds. It contains anywhere from 50 to 70 percent methanol and from 30 to 40 percent of carbon dioxide, while also containing sulphur hydrogen, ammonia and nitrogen. Almost all organic materials (plant matter, silages, etc.) can be processed into biogas. The only condition is that they must contain a sufficient share of carbon.

The processing of organic substances into biogas has been an environmentally friendly means of acquiring useful energy for decades. With biogas, which can be distributed through gas pipelines or utilised as a fuel for combustion in specially modified motors with internal combustion, we can additionally produce a high quality natural fertilizer from the production process. This fertilizer does not have an unpleasant smell and is not harmful to plants. Fertilizing with it also allows a decreased utilisation of chemical materials in farming.

Biogas is one of the most efficient and environmentally friendly energy sources. When it is burned, its emissions produce less greenhouse gases than plants use for their growth through photosynthesis, with which they produce oxygen and utilise CO2. The burning of biogas therefore, doesn't contribute to the increase of greenhouse emissions in the atmosphere, as opposed to fossil fuels. This is because the burning of biogas CO2 is neutral, as it contains the most methane (up to 75 percent). When burned, this gas breaks down into carbon dioxide and water vapour, which means that the greenhouse effect, as compared to direct methane emissions into the atmosphere, is decreased 15 times over. Otherwise, the calorific value of biogas on m3 is approximately 6 kWh.

There are over 5 million devices for the production of biogas in the world today. Within the European Union, the production of biogas is the most developed in Denmark, in Germany and in Switzerland. In these countries, modern equipment is utilised to produce electric and heating energy. Simpler forms of biogas plants are known in China and India as well, where they serve to produce energy for cooking and lighting.

Biogas plant

BIOGAS PLANT LENDAVA – basic information

The Lendava biogas plant is a mesophillic biogas plant that runs on renewable sources of energy, especially of the closed variety. This means, that all facilities of the biogas plant are appropriately sealed and that all processes run in enclosed spaces. The supervision of all processes is regularly performed by all of the state inspections with jurisdiction under the purview of the Ministry of the Environment, as well as by other public institutions with jurisdiction.

The biogas plant is made up of many components:
  • A collection pit for the collection of the substrate.
  • A pumping system (pump station) from the collection pit into the fermentor and post fermentor, where the process of fermentation takes place.
  • The final collector, where the remnants of the fermentation process are collected, in the form of sediment.
  • While undergoing fermentation, the biogases produced are stored in gas storage and are available for the co-production of electric energy and heating, where the energy is transformed into electric and heating energy for internal and external use. Around 20 to 25 percent of the heating energy produced must be stored for the heating of the fermentors.
  • From silage to green plants – the conversion process
We utilise silage from plants to run the biogas plant. The process of its conversion into a biogas takes place with the aid of fermentation. During the process of fermentation, anaerobic bacteria break down the organic material into its final form, of which the largest share is represented by CH4 (methane) through multiple phases. In essence, the process of fermentation is made up of four processes, which follow each other in succession until biogas is produced. However, all processes are subject to the influence of many types of anaerobic bacteria, as follows:
  • Hydrolysis of complex compounds in organic molecules (carbohydrates, fats, proteins, sugar, amino acids);
  • Fermentation (simple organic acids, alcohols; executed at a temperature of 40 degrees Celsius);
  • Transformation into straight molecules with various methyl groups (acetic acid, hydrogen, formic acid, bicarbonate);
  • Synthesis of biogas, where it is the final substrate. It is produced after fermentation has concluded and contains microbiologically indigestible substances, containing minerals and microbiological biomass.
The energy of the acquired gas is equal to that utilised during photosynthesis. The advantage of biogas is that it can be converted into electric energy through a relatively simple process. Biogas combusts in a gas motor powered by an electric generator; as it burns, a large amount of heat is released. This is what gets utilised for the heating of industrial objects and residential facilities or for biomass drying purposes.

The substrate, which forms after fermentation has concluded, contains microbiologically indigestible substances, which contain minerals and microbiological biomass, as well as nutrients and serve as an excellent natural fertilizer.

The energy released through the burning of the carbon dioxide, is theoretically equal to that released when biogas is burned. The energy acquired is equal to that utilised during photosynthesis.

After many years of experience abroad and numerous innovations with our technological equipment, we as engineers have developed the most optimal solutions for the establishment of our biogas plants ECOS, in cooperation with our customers. We can confirm this further with references from our custmers.

Services of Company ECOS:
  • Project execution and study design
  • Assistance with acquiring permits
  • Preparation of documentation for the declaration filing
  • The supply of all necessary equipment for the construction of biogas plants
  • Turn key execution
  • Financing
  • Operations monitoring