الفهرس 
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Abstract
Wastewater treatment is considered one of the main important items in
the wastewater works. Its necessity increased with the concentration on the
pollution of environment and its controL
The wastewater treatment has several types of treatment processes
depending on the used technique.
We can divide the treatment processes to three main categories as
folllows:
•
•
•
Ponds (Natural or Aerated)
Activated sludge processes .
Biological Filter process .
All the three types depend on the bacteriological activity in the sewage
to remove the organic components from wastewater before its disposal
preventing any biological growth at the disposal body.
One of the main problems which faces the designer of the wastewater
works is the choice of the type of the wastewater treatment process.