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.

  • Approved By: Arkansas Department of Environmental Quality

Instructor Bio

Ralph Stevens

Ralph Stevens is a water Subject Matter Expert, licensed in California, Nevada and Arizona as a Grade 3 Wastewater Treatment Plant Operator. Ralph has worked in wastewater for almost 50 years, starting as an operator in a wastewater treatment plant and serving most recently as the Maintenance Reliability Supervisor for the Clark County Water Reclamation District. He is a certified Class Trainer for the California Water Environment Association (CWEA) and has served as the Operations and Maintenance Chairperson for the same organization. He has won a number of awards for his work, including CWEA Electrical and Instrumentation Person of the Year (2015), Safety Plant of the Year (2017), and the WEF Burke Safety Award (2019). Ralph goes out of his way to help and protect staff and the environment.