Urbaser Environnement is an expert in the different technologies described below both as the designer and the operator. These technologies contribute to achieving the objectives of the public policy from the French “Grenelle de l’Environment”, that is, to reach the 20% renewable energy target in 2020.
Our technical solutions:
Recycling:Sizing, manual sorting, magnetic separation, and compaction are the principal operations involved in sorting selective collection in order to recover clean and dry packaging. These operations take place in hermetically closed buildings.
Methanisation is the decomposition of the organic matter contained in waste in an anaerobic environment.This decomposition, which occurs in several stages using specific bacteria and under specific conditions, notably of very precise temperatures, includes the production of a methane-rich biogas.
This technology is a relevant solution for the treatment of the biodegradable fraction contained in household waste (kitchen and garden waste, paper, cardboard) to the extent that this fraction represents 50 to 55% of that waste.The organic waste degradation process results in:
- Producing energy in the form of biogas with a methane content of 55%
- Producing a hygienic and stable compost with the qualities of a recoverable organic amendment
The advantages of methanisation:
- Production of biogas, a recoverable renewable energy,
- Production of a recoverable organic amendment,
- Reduced physical footprint,
- Purchase price of green electricity increased by 50% since July 2006,
- Reduction of environmental impacts.
Aerobic composting:We have developed several aerobic composting solutions using technologies adapted to waste type and quality.
- Aerated tunnel composting (static)
- Windrow composting (dynamic)
- Box composting (dynamic)
The composting technology can either treat the organic fraction contained in the waste after sorting or further treat the digestate after methanisation.
Composting corresponds to a biological deterioration of organic matter in the presence of oxygen through the combined action of different bacterial populations. Raising the temperature by 60 to 70°C during the several weeks of biological deterioration produces a hygienic and stable compost with the qualities of a recoverable organic amendment.
This process can be applied to bulk collected household waste or to the fraction with the high calorific value contained in household waste. In this last case, the incineration process becomes complementary to a biological treatment unit processing the biodegradable fraction.