Most of the household waste may be upgraded using a composting or co-composting process.
In order to get a homogeneous compost, the control of the wastes' structure and chemical composition allows to check on the heterogeneity of the input materials.
The compost from household waste is mainly used for agricultural upgrading.
URBAN SEWAGE TREATMENT PLANTS' SLUDGES
The sewage treatment plant's residual sludges are difficult to turn into compost because of their high level of moisture and their lack of structure.
In order to get a compost of quality that complies with the French norm NFU 44095, sludges should be mixed with co-components.
These co-components are made of organic matter and possibly fermentable fraction of household waste and/or animal waste.
GREEN WASTE
Green waste comes from maintenance of public or private green spaces.
Once the nonfermentable products (plastics, soil...) are removed, the waste is crushed to then be sent to composting stations.
They do not need any amount of co-product to be turned into compost.
RESIDUAL HOUSEHOLD WASTE
Once the household waste is sorted, the unwanted or polluting elements must be moved apart.
It is only from then that the household waste may be turned into compost so as to comply with the required standards of quality laid down by the French standardization group AFNOR.
In order to get a compost that complies with the French legal standard NFU 44051, they should be mixed with green waste.
