Electric Motor Control Basics - Book - Page 55
Applying Motor Control in a Wastewater Application
Liquid level switches and sensors trigger when a desirable water level is attained.
Trapped air column, or bubbler system that senses pressure and level, are commonly
used for pump station controls. Other control alternatives are electrodes placed at cutoff levels and float switches. These sensors and switches signal the pump motor control
systems to keep the water treatment process flowing and achieving optimum process
efficiencies.
Municipal water systems use pumps to draw raw water from resources, such as lakes
or rivers, for treatment to meet regulatory standards for potable water for human
consumption or use in cooling towers, boilers, and other industrial applications.
Types of Pumps used in the Water and Wastewater Industry
Water and wastewater management has become a priority in industries such as
chemical manufacturing, energy production, and food and pharmaceutical processing.
The quality of water treatment entirely depends on the type of process employed.
These treatment plants employ primary, secondary, and tertiary processes that vary
depending on the level of contaminants in the water. The following are some popular
pumps largely used in water and wastewater industry for water treatment.
• Positive Displacement Pumps
• Centrifugal Pumps
• Submersible Pumps
• Rotary Lobe Pumps
• Peristaltic Pumps
• Progressive Cavity Pumps
• Airlift Pumps
• Trash Pumps
• Water Pressure Booster Pumps
• Agitator Pumps
• Circulation Pumps
Industrial Control
Basics:
Part 1, Contactors
Industrial Control
Basics: Part 2,
Overload Relays
Industrial Control
Basics: Part 3,
Starters
The Benefits of Type E/F
Motor Protection
Circuit Breakers
Basic Pump Control:
Three Phase DOL Starter
Control of an Electric Pump
Applying Motor Control
in a Wastewater
Application
NEMA vs IEC Motor
Controls
Understanding
IP Ratings
55
