Site pages
Current course
Participants
General
Topic 1
Topic 2
Topic 3
Topic 4
Topic 5
Topic 6
Topic 7
Topic 8
Topic 9
Topic 10
Topic 11
Topic 12
Topic 13
Topic 14
Topic 15
Topic 16
Topic 17
Topic 18
2.5.1.Preliminary Treatment
Unit 2 : Sewage and domestic wastes, treatment and reuse
2.5.1.Preliminary Treatment
The major aim of preliminary treatment is to remove the larger solid debris and floating materials (wood, paper rags and plastics).
The waste is passed through screens consisting typically of parallel iron bars for the removal of floating objects (rags, plastics and wood). ‘comminutor’ or macerator is often provided for grinding the coarse material into smaller particles. A separate grit chamber is often provided where the waste is given retention for only a few minutes to settle down grit and other heavy materials.
The major aim of preliminary treatment is to remove the larger solid debris and floating materials (wood, paper rags and plastics).
The waste is passed through screens consisting typically of parallel iron bars for the removal of floating objects (rags, plastics and wood). ‘comminutor’ or macerator is often provided for grinding the coarse material into smaller particles. A separate grit chamber is often provided where the waste is given retention for only a few minutes to settle down grit and other heavy materials.
Last modified: Friday, 10 June 2011, 4:34 AM