Never-Fail Math Approach
Using units (e.g., gal, ft, lb, mg/L) to set up math problems, to tell you whether to divide or multiply by a number, to give the correct answer, is a bit like playing dominoes. Learn the solution bridge most wastewater math problems will do themselves.
Solids and Organics (BOD, cBOD, NOD, and COD)
A lot of the terminology used in wastewater treatment can be confusing, especially for those just beginning their career. Before nutrient removal was a concern, wastewater treatment aimed at the removal of solids and organics.
For certification exams, many of us have memorized primary clarifier removal efficiencies typical in municipal wastewater practice. Have you ever wondered where those ranges came from? This lesson emphasizes the simplicity of primary clarification and what can and can’t be removed in primary clarifiers.
Ponds and Trickling Filters
Considered secondary processes, ponds and trickling filters find significant use in wastewater treatment. On this account, questions regarding them are frequently asked on certification exams. This lesson presents the basics of both and how loading problems—hydraulic and organic—should be approached.
Activated sludge is the most widely used wastewater treatment technology in the world, for good reason. It is reliable, versatile, and, when properly operated, economical. This lesson is an overview of the process, some of its modifications, and process control calculations.
Biological Nutrient (N&P) Removal
Oxidation of ammonia (nitrification), nitrogen removal (nitrification/denitrification), and biological phosphorus removal in the activated sludge process are presented. These processes are becoming more and more common in more and more geographical locations across the country.
Most of the influent organics end up, in one form or another, being treated in the digester at municipal wastewater treatment plants. This lesson focuses on anaerobic sludge digestion which produces methane, a valuable byproduct.
“I just received results from the Grade I exam, and I did in fact pass. Thank you so much for all your help. You provided me the foundation to study upon, and I knew I got 100% on the math. Despite being the ONLY person in the class to not understand it, I put in the time. Similarly to what I learned in The Military with the NAVY SEAL/S, failure is not an option. With that being said, I suppose that’s why I was so frustrated, not getting the methods. I will now use the same methods to study for my grade II and take that exam in April. Thank you again.”
– Derek Newman, Grade I Operator, Coachella Valley Water District, Grades I/II Student Summer 2014
“You and Eric are doing a great service to the wastewater industry with your classes. Eric’s method of teaching engages students, and the RR track method of teaching the math gets around memorization and lack of algebra skills. I can’t believe I’m already taking the Grade 5 exam. I started in this industry only 5 ½ years ago. For the Grades 2, 3, and 4 exams, Eric paved the way for my success. I had to study on my own, but the tools he gave me were invaluable to pass those exams.”
– James D. Anderson, General Manager, Malaga County Water District