Page 205 - Water and Wastewater Engineering Design Principles and Practice

5-8 WATER AND WASTEWATER ENGINEERING

Chemical feeders

Dry feeders Liquid feeders Gas feeder
Peristaltic pump Vacuum regulator
Piston pump Rotameter
Diaphragm pump
Rotating dipper
Rotameter
Loss-in-weight
Gravimetric Volumetric

Loss-in-weight belt Rotaing disc
Rotaing cylinder
Screw
Ribbon
Belt
FIGURE 5-2
Chemical feed systems.

Dust Fill pipe
collector (pneumatic)

Dust
Bulk storage collector
Bag
bin
Screen fill
with
breaker
Day hopper for
Bin gate
dry chemicals
from bags
Flexible
connection or drums
Alternative supplies depending on storage

Water Feeder
Dust and vapor
supply
remover Scale or
sample chute
Drain Control Solenoid Baffle
valve valve

Rotameter
Dissolver Gravity to application
Level
Pressure reducing
valve probes
Holding
tank
Water supply Pump to use
FIGURE 5-3
Dry chemical feed system. ( Source: Metcalf & Eddy, 2003.)