The biomass used in our process is a source of energy which:

• Limits certain forms of pollution from vegetal waste by treating it almost immediately it is produced
• Reduces the overload on local authority collection centres
• Limits the emission of greenhouse gases into the atmosphere
• Provides energy locally where it is consumed
• Contributes to the health of the local economy
• Creates employment locally.

In urban centres and rural authorities, a well-established organisation already exists for the collection of vegetable waste, but the storage and treatment facilities are unsuited for this type of waste and present numerous problems
Green waste availability has high-volume seasonal peaks, which contribute to the saturation of the collection equipment and treatment facilities, be they :

1. Waste tips: green waste increases fermentation in the tip – whereas the goal is just the opposite: to reduce the production of methane and leaching agents.

or
2. Incineration plants: The origin and composition of certain types of waste perturb efficient combustion in the incinerator ovens.

Large quantities of green waste cause variations in the calorific value of household rubbish, a drop in operating temperature and unburnt or non-standard clinker.

ZETA’s answer: The green pellet

Without pollution or toxic fumes, and additive-free, the « pelletisation » of green waste involves:

• Reception of the waste in a centre located on the outskirts of the town or city
• Sorting of the waste
• Rough grinding and elimination of non-vegetal substances
• Immediate pelletisation of the ground material
• Storage of the pellets in silos, or immediate despatch by road tanker to local authority boilers.

The ZETA pellet is a standardised agricultural pellet, in the form of a 6 mm-diameter cylinder. It has a density of 630 to 660 kg/cu m and an LHV (Lower Heating Value) of the order of 4200 kWh per tonne. The rate of ash production is 3 - 5% of the finished product.
The pellet is intended for boilers rated in excess of 150 kW or for the hybrid boiler Zetech Pro.
In transforming one tonne of ground vegetal waste into pellets, a ZETA machine consumes 100kWh of electricity, a carbon footprint of 6000 g of CO₂.
One tonne of vegetal material produces an average of 600 kg of pellets ready for use as fuel.