PAYMENT
UNIT – IV
LAYOUT AND GENERAL OUT LINE OF VARIOUS
UNITS IN A WASTE WATER TREATMENT PLANT
– PRIMARY TREATMENT DESIGN OF SCREENS –
GRIT CHAMBERS – SKIMMING TANKS –
SEDIMENTATION TANKS – PRINCIPLES AND
DESIGN OF BIOLOGICAL TREATMENT – TRICKLING
FILTERS – STANDARD AND HIGH RATE- FILTERS –
ASP – ASP MODIFICATION – AERATION