Maryland Maintaining Wastewater Equipment

After completing this course, the licensee should be able to:

• Describe a typical collection system layout.
• Name the three types of pumping stations currently in use and explain how they differ.
• Use the following terms in an explanation of pump operation: impeller, shroud, volute case, stuffing box, shaft sleeve, wearing ring.
• Name the importance of a pump station ventilation system.
• Demonstrate the necessary procedures to follow before pump start-up.
• 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.
• 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 handcleaned grit chambers.

Course ID(s): 6896-20-12-O

Approved By: Department of The Environment - Board of Waterworks And Waste System Operators