CH3 PW1 Valenton sewage managing : Sortie à l’usine d’épuration de Valenton. Fiche Élève

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Interfaces fragiles de la planète terre
Gestion des eaux usées
Managing sewage
Sewage consists of faeces and urine, industrial and
household wastes, water and debris draining from roads.
Biotechnology, engineering, computer control and microorganisms deal with the wastes
collected in sewers.
Try to make a sketch or a text of the managing sewage
with the following words to explain the managing sewage in Valenton plant :
sewers
pumphouse and screen (closely spaced metal bars which remove rags, paper, wood etc)
grit removal
primary settling tank (and crude sludge)
aerobic processing (microorganisms : bacteria, fungi, protists)
with activated sludge process, diffusers bubble air
with trickling filter process
outfall (to the river)
and
anaerobic processing for sludge
power house (with methane)
dumping (of digested sludge)
vocabulary :
sewer : égout
grit : sables
sludge : boues
to trickle : couler goutte à goutte
to scrub : racler
settling tank : bassin de clarification
processing : processus
aerobic : aérobie (= en présence d’oxygène)
power house : centrale électrique
Assessment
The four
following pictures come from Valenton plant.
Picture A
Picture B
Picture C
Picture D
- Give a title to each of them
- Put them in the right order
- Choose one picture, sketch it, label it and describe this particular treatment stage.