Operator Certification Study Notes
The recurring topics operators are tested on across most state certification exams.
Nitrification & Denitrification
Ammonia conversion and nitrogen removal pathways commonly tested on Grade 3–4 exams.
Sludge Settleability & SVI
Calculating Sludge Volume Index and interpreting settling test results correctly.
Chlorination & Disinfection
CT values, breakpoint chlorination, and dechlorination fundamentals.
Hydraulic & Organic Loading
Calculating loading rates for clarifiers, filters, and aeration basins.
Activated Sludge Process Variants
Recognizing conventional, extended aeration, step-feed, and contact stabilization configurations by their defining features.
Sampling & Lab QA/QC
Chain of custody, holding times, and duplicate/blank sample requirements tested on most certification exams.
NPDES Permit Basics
Reading and interpreting the structure of a discharge permit — limits, monitoring frequency, and reporting deadlines.
Solids Handling Calculations
Digester loading, dewatering capture rate, and biosolids disposal calculations that bridge process control and solids handling.
Disinfection Byproducts & Regulatory Limits
Understanding why disinfection method choice involves tradeoffs beyond simple pathogen kill effectiveness.
Collection System Fundamentals
Basic collection system topics tested alongside plant process material on most state exams.
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