Solids Removal- Suspended Solids Removal
removal of suspended solids from wastewater refers to the removal of particles
and floc to small or too lightweight to be removed in gravity settling.
particles may have been brought over from secondary treatment or ppt in
Methods of removal
Slow Sand Filters
This method is most
successful as a polishing step in oxidation ponds. (Not suitable for effluent
from conventional treatment due to clogging)
The bed comprise duel or
multimedia beds and is most suited for effluent from secondary treatment
Moving Bed Filters
These are continuous cleaned,
with the rate of cleaning adjusted to match the solids loading rate. This
system as the ability to filter raw sewage.
Compressed air is
periodically injected to break up the thin surface mat of deposits.This system
as the ability to filter raw sewage.
Solids Removal- Dissolved Solids Removal
treatment as well as nutrient removal decreases the dissolved organic solids
present in WW. However, neither process completely removes ALL organic
dissolved solids OR significant amounts of inorganic dissolved solids.
substantial reduction in dissolved solids is required, further treatment would
be needed. These techniques are similar to that used in the advanced treatment
ofWater for removal: