Although it may seem that any organic waste is suitable for producing biogas, the reality from a technical and economic point of view is that not all garbage is 'equally good'.
Given the properties of each waste, there are two parameters when determining its value: the organic matter content and the speed at which it degrades.
We can talk about a 'ranking' of the waste that is most interesting for the production of biogas, although on many occasions they are mixed together in a process called co-digestion.
On the podium they would meet the substrates of the agri-food industry, that is, perishable products that generate waste or that do not meet the required standards.
Studies indicate that with 500 tons of potato skins a biogas plant can produce up to 372 MW of electrical energy.
In second place would be substrates obtained from livestock, specifically manure and slurry from birds, rabbits, pigs, cattle, etc. These are interesting due to their high content of organic matter and that “because it has been degraded by the digestive system of animals, the material allows more biogas to be produced in less time.”
The bronze medal would go to waste and agricultural by-products, that is, "what is produced in the field: crop waste, straw, cereal husks that are removed to leave the grain, a tomato plant, silage dust... These are more complex materials and the production time degradation is longer.”
In fourth place, they join together in the same group substrates extracted from different industries, such as brewing, cider or wine, from which the grape skins are extracted. Waste produced by the oil industry or even the glycerin produced in the manufacture of biodiesel would also enter.
About us Genia Global Energy has an agreement with the Spanish Persimmon Association to manage the 18.000 tons generated in each destruction campaign of this fruit, that will be used to produce biogas in a new plant in the Ribera region. "As these materials are fresh, their percentage of organic matter is very high, making them interesting for producing biogas."
This content comes from FRUITTODAY
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