Sanitation

Rotating biological contactor

Sens technique

Biological treatment process at fixed culture on carriages. These rotating biological contactors (RBC), generally polystyrene, measure 2 to 3 m in diameter and rotate about a horizontal axis by being partly immersed. Sludges, putrescible very produced by this system are removed by a secondary clarifier.

Source

according to Recyconsult

Sludge settling

Sens technique

Separation of active sludge and treated water obtained by sedimentation in a clarifier or secondary clarifier. Good settleability of the sludge is essential for the process to be efficient and reliable.

Source

according to FNDAE

Sanitation contract

Sens technique

Multi-year contract signed by various stakeholders (a municipality, a wastewater treatment syndicate, a water agency, etc.) to specify the nature, cost and duration of the planned sanitation work to meet essential technical and financial development in the long term.

Source

according to the Mulhouse Multipurpose Syndicate

Sludge conditioning

Sens technique

Change of the characteristics of sewage sludge by physical or chemical processes to facilitate the separation of solids and liquids.

Source

according to Recyconsult

sludge composting

Sens technique

Aerobic biological stabilisation process (without the presence of oxygen) of sewage sludge.

Source

according to ADEME

Sewage farm

Sens technique

An area receiving, through a network of buried pipes, the clarified waters coming out of an all-water pit and having enabling conditions for the purification and drainage of the treated wastewater towards the deeper layers of the subsoil.

Source

according to Alpes Géo Conseil

Primary sludge

Sens technique

It includes settleable solids removed during primary wastewater treatment in clarifiers. Primary sludge is rich in mineral matter.

Source

according to Wikipedia

Mixed sludge

Sens technique

This sludge is usually a mixture of primary sludge and biological sludge.

Source

according to Wikipedia

Hydroxide sludge

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

Sens commun

Sludge resulting from the primary treatment by clarifier.

Source

according to the eco-enterprise development centre