PAYMENT
UNIT – V
CONSTRUCTION AND DESIGN OF OXIDATION
PONDS – OXIDATION DITCHES – SLUDGE
TREATMENT – SLUDGE DIGESTION TANKS –DESIGN
OF DIGESTION TANK –FACTORS
AFFECTING SLUDGE DIGESTION – SLUDGE
DISPOSAL BY DRYING – SEPTIC TANKS –
WORKING
PRINCIPLES AND DESIGN – SOAK PITS. ULTIMATE
DISPOSAL OF WASTE WATER – SELF
PURIFICATION OF RIVERS – SEWAGE FARMING.