What we do

PRECO's technology

PRECO's technology is mainly based on the thermochemical process called pyrolysis, significantly different from the incineration process, widely used in waste disposal.

Pyrolysis refers to the thermal decomposition of matter, carried out at high temperatures in inert atmosphere and, therefore, with no combustion. This process allows to obtain various products with high added value, promoting a circular economy, based on the recovery of matter and energy from waste instead of dedicating it for landfill, in accordance with the European regulatory framework.

1. Pretreatment of waste

Obtaining SRF

The activity of waste recovery proposed by PRECO reduces the volume of waste destined for landfill, complying with article 5 of the Spanish Real Decreto 1481/2001, which highlights that the amount of biodegradable waste disposed in landfill must be minimized, and that priority must be given to its recovery through recycling, composting, energetic recovery from waste and other forms of valorization.

Thus, some non-hazardous wastes are summited to processes of characterization, selection, selective triage, removal of metals and other improper or non-recoverable materials, as well as crushing and refining processes, obtaining the so-called solid recovered fuel (SRF), destined for energetic valorization or material valorization

The obtained SRF complies with the European standards related to quality, control and certification, specified by the European Committee for Standardization CEN TC 343, in which AENOR also participates. The EN 15359/2011 standard prepared by the Committee includes the required quality specifications, as well as different classification categories, according to parameter values, with special emphasis on the Lower Heating Value (LHV), related to economic profitability, chlorine (Cl), related to the technology of recovery and mercury (Hg), related to emissions.

SRF is mainly made up of variable percentages of the fractions indicated below.

• Biomass originated from the organic fraction of urban waste. This kind of biomass is mainly formed by paper, cardboard, wood, plant remains, food remains, cellulose and other organic materials.
• Mix of plastics from urban waste. This mixture is made up of a diversity of packaging plastics, containers and other post-consumer plastic materials.

The final quality of the SFR obtained depends on the residual material of origin, as well as on the technology used in its manufacture.

2. Biomass pretreatment

PRECO holds the technology necessary for the recovery of the organic fraction originated from domestic, commercial, industrial and bio-waste, as well as agroforestry biomass.

In order to homogenize the residual matter to be valorized, to reduce its initial humidity, decrease its grain size and increase the specific surface, we developed different pre-treatment processes aimed to achieve the best possible characteristics of the residues, regarding their recovery.

Among the pretreatments we have developed, stand out the following:

• Drying

• Chopping

• Grinding

• Milling

• Densification

3. Thermal pyrolysis

Pyrolysis is an anaerobic process of decomposition of matter, carried out at high temperatures and in an inert atmosphere, allowing the transformation of macromolecules, also called polymers, into smaller molecules, through cracking.

Ten years of R&D&I, in collaboration with different technological centers and universities, precede the development of the thermochemical process of pyrolysis carried out by NEOLIQUID. This process allows the recovery of multiple domestic, commercial, industrial and bio-wastes, as well as agroforestry biomass, obtaining a diverse range of high value-add products.

Currently, PRECO's activity includes technology on an industrial scale in self promoted plants based on pyrolysis.

4. Mobile plant for military use

The R&D&I process developed between PRECO, DETEGASA and ARGOS DEFENSA allows the recovery of waste using THERMAL PYROLYSIS technology in a mobile plant for temporary or permanent military installations.

The technology is transported in a 40-foot container, allowing the recovery of materials in the areas of waste ​​production, treatment or storage, avoiding its transfer.

We also highlight our administrative agility in managing authorizations, permits and licenses needed for carrying out the mentioned activity, given its characteristics.

What we do