Presentation

 

“Waste reduction is one of our priorities. Converting waste to heat and electricity is a responsible way to help preserve our planet”


Energy-from-waste treatment contributes to sustainable development in a number of ways. First, it reduces the volume of waste produced by 70% in weight (or even 95% after recovery of bottom ash). Secondly, it facilitates effective recovery of the energy contained in the waste, while complying with European regulations on atmospheric emissions. These features make energy-from-waste treatment an indispensable part of any integrated waste management plan.

Cutting edge processes

VINCI Environnement is the only designer with its own proprietary technologies in this area. Its comprehensive, innovative line-up of products includes rotary, stepped-grate and roller-grate furnaces, and its recently developed water-cooled grate, capable of treating a broad variety of waste, including:
municipal waste
mechanical-biological treatment refuse
miscellaneous waste for co-combustion (municipal wastewater treatment sludge, healthcare waste, etc.)
industrial waste (solid, liquid, semi-liquid)

VINCI Environnement’s in-house teams are continuously working to improve the combustion technologies it has deployed over more than 30 years and in around 60 lines now in service. The roller-grate furnace is a particular focus of development, being designed to handle a wide variety of waste, including:
low net calorific value wet waste such as the waste treated in the Fort de France unit built by VINCI Environnement in 2001
high net calorific value waste such as the waste to be treated at the Clermont-Ferrand energy-from-waste unit now under construction.


Net calorific value Net calorific value (NCV—also called net heating value or lower heating value) is a physical property of all combustible fuel, including coal, natural gas, petrol (gasoline), and waste. It stands for the real quantity of heat released in a combustion process (usually expressed in kilocalories, kilojoules or megajoules) of one kilogram or one litre of combustible material. The net NCV of waste depends on the composition of the combustible material, biodegradable portion, paper, plastic, metal, etc. and of its moisture content. The higher the NCV, the greater the amount of thermal energy and energy that can be recovered from the material.
Net calorific value of selected combustible materials:
Fuel NCV in MJ/kg
Coal 33.3
Natural gas 38.1
Petrol (gasoline) 42.5
Diesel 43.0
Waste 9.5
Finally, thanks to its in-house mastery of the full range of flue gas treatment technologies, installations designed and built by VINCI Environnement always embody the best available depollution and environmental protection technologies ( see Flue gas treatment). style="float:left; margin-top:20px;">


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