Primary sludge
Définition
Sens technique
It includes settleable solids removed during primary wastewater treatment in clarifiers. Primary sludge is rich in mineral matter.
Source
according to Wikipedia
Drinking water and sanitation
Mixed sludge
Définition
Sens technique
This sludge is usually a mixture of primary sludge and biological sludge.
Source
according to Wikipedia
Hydroxide sludge
Définition
Sens technique
Sediment resulting from the physico-chemical treatment of industrial wastewater. Hydroxide sludge, generated by surface treatment of metal parts, is considered to be hazardous.
Source
according to the South-Pyrenean Waste Observatory
Primary/green sludge
Définition
Sens commun
Sludge resulting from the primary treatment by clarifier.
Source
according to the eco-enterprise development centre
Digested sludg
Définition
Sens technique
Also called anaerobic sludge, it results from a biological stabilisation process, reducing the amount of organic matter in the waste, through anaerobic digestion (absence of oxygen) in a digester.
Source
according to Wikipedia
Water treatment sludge
Définition
Sens commun
Sludge resulting from the treatment of water.
Source
according to the Seine-Normandy Water Agency
Biological sludge
Définition
Sens commun
Residual solids produced by biological wastewater treatment. Biological sludge is mainly composed of bacterial bodies and secretions.
Source
according to Wikipedia
Activated sludge
Définition
Sens technique
Biomass of microorganisms used for treating wastewater from their pollutants (mainly organic matter). Microorganisms are free, suspended in the wastewater, kept inside an aeration tank, and feed on the pollutants. Then, the separation of activated sludge and water occurs in a clarifier: a part of the sludge is put back into the aeration tanks, while the other part (corresponding to the increase of stock) is discharged.
Source
According to FNDAE
Retention basin
Définition
Sens technique
A storm management basin for the temporary storage of runoff water to protect homes and structures during periods of heavy rain.
Source
according to the Intermunicipal Sanitation Syndicate of the Enghien-les-Bains region
Pollution basin
Définition
Sens technique
Storm basin intended to retain the pollution of the first waters during periods of heavy rain.
Source
according to FNDAE