Lesson 1 - Pumping Stations

Topics:

Pump stations; Pump types, operation, and maintenance; Drive units; Piping; Controls; Level detection; Safety

Learning Objectives:
– Describe a typical collection system layout.
– Name the three types of pumping stations currently in use and explain how they differ.
– List seven basic components of wet-well and dry-well stations.
– Use the following terms in an explanation of pump operation: impeller, shroud, volute case, stuffing box, shaft sleeve, wearing ring.
– Name the important elements of a good preventive maintenance program for pumps.
– Explain the importance of a pump station ventilation system.
– Demonstrate the necessary procedures to follow before pump start-up.


Lesson 2 - Screening and Grinding Equipment

Topics:

Bar screens; Grinders; Rotating drum comminutors; Stationary screen comminutors with oscillating cutters; Barminutors

Learning Objectives:
– Name the two basic parts of a hand-cleaned bar screen and explain their functions.
– Describe the operation of a mechanically cleaned bar screen.
– Explain why grinders are used and how they are maintained.
– Compare and contrast a rotating drum comminutor and a stationary screen comminutor with an oscillating cutter.
– Explain how a Barminutor combines the functions of a bar screen and a comminutor.
– Give examples of important safety rules to follow when working with screening and grinding equipment.


Lesson 3 - Grit Removal Systems

Topics:

Grit chambers; Detritus tanks; Chain and flight grit collectors; Aerated grit chambers; Cyclone separators

Learning Objectives:
– Tell why grit removal is important.
– Name the three phases of the grit removal process.
– Explain the functions of slide gates and dewatering drains in hand-cleaned grit chambers.
– Describe the action of a reciprocating rake and explain its purpose.
– List several maintenance checks to make on chain and flight grit collectors.
– Explain how an aerated grit chamber works and how to tell if it is not working correctly.
– Describe the operation of a cyclone grit separator.


Lesson 4 - Sludge- and Scum-Collection Apparatus

Topics:

Sedimentation; Clarifiers; Scum and sludge removal; Lab testing; Maintenance; Troubleshooting; Safety

Learning Objectives:
– List the five major components common to all clarifiers.
– Describe the operation of slotted pipe and helical-type skimmers.
– Name the two flow patterns possible in circular clarifiers.
– Discuss the daily maintenance requirements of clarifiers.
– Explain the importance of laboratory testing on the contents of a clarifier.
– Identify possible safety hazards associated with clarifier operation.


Lesson 5 - Flow Measurement Devices

Topics:

Flow measurement in batch processes, filled pipes, open channels, and freely discharging pipes; Depth and pressure measurement

Learning Objectives:
– Define flow and differentiate between flow rate and total flow.
– List the three basic types of flow systems.
– Distinguish between direct and indirect flow measurements,and between primary and secondary devices.
– Give a brief description of a current meter, a pitot tube, a weir, and a flume, and tell how each functions in open channels.
– Describe several methods of measuring flow from freely discharging pipes.
– Name at least five level detection devices and explain their operation.
– Describe the following flow measurement devices as they are used in completely filled pipes: orifice, venturi, flow nozzle, rotameter, magnetic flowmeter,
   and ultrasonic flowmeter.