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An Introduction to Primary Wastewater Treatment

COURSE NO: C02-034
An Introduction to Primary Wastewater Treatment
Course Highlights

This online engineering PDH course will introduce you to processes and equipment for primary treatment of wastewater. You will be introduced to descriptions, functions and design considerations for sedimentation tanks and clarifiers, chemical precipitation, and Imhoff tanks.  You will learn how the primary treatment processes works together with the preliminary, secondary, tertiary and sludge handling processes to form a complete wastewater treatment plant.


Wastewater treatment is usually characterized as consisting of four sequential processes: preliminary, primary, secondary and tertiary treatment. 


This 2 PDH online course is intended for civil, environmental and chemical engineers as well as construction professionals seeking an introduction to primary wastewater treatment.

Learning Objectives

This PE continuing education course is intended to provide you with the following specific knowledge and skills:

  • Understanding the function of primary sedimentation
  • Learning about sedimentation tank design parameters
  • Learning about detention time for sedimentation tanks and clarifiers
  • Learning about weir loading rates for sedimentation tanks
  • Learning about sludge and scum collection for rectangular and circular sedimentation tanks
  • Learning how to calculate sedimentation tank size
  • Learning about chemical precipitation using aluminum and iron salts, lime, and polyelectrolytes
  • Learning how to calculate sludge production using chemical addition in primary sedimentation
  • Understanding the functions and features of Imhoff tanks
  • Understanding the typical characteristics of domestic sewage sludge
Course Document

In this professional engineering CEU course, you need to review the course document titled, "An Introduction tp Primary Wastewater Treatment".

To view, print and study the course document, please click on the following link(s):
Introduction to Primary Wastewater Treatment (613 KB)
Course Quiz
​Once you complete your course review, you need to take a multiple-choice quiz consisting of fifteen (15) questions to earn 2 PDH credits. The quiz will be based on the entire document.


The minimum passing score is 70%. There is no time limit on the quiz, and you can take it multiple times until you pass at no additional cost.
Certificate of Completion

Upon successful completion of the quiz, print your Certificate of Completion instantly. (Note: if you are paying by check or money order, you will be able to print it after we receive your payment.) For your convenience, we will also email it to you. Please note that you can log in to your account at any time to access and print your Certificate of Completion.

To buy the course and take the quiz, please click on: