Advanced Process Control, Biosolids & Reuse Compliance
This guide builds on Grade 1 fundamentals to cover the advanced process-control, biosolids, and reuse-compliance topics tested at Grade 2 through Grade 4 in Arizona.
Reuse-driven process design
Arizona is one of the most reuse-intensive states in the country: reclaimed water offsets potable demand for irrigation, industrial use, and groundwater recharge. Under Arizona's reclaimed water rules (A.A.C. Title 18, Chapter 9), treated effluent is classified into quality classes — commonly referenced as A+, A, B, and C — that match the level of treatment and pathogen/nutrient removal to the intended reuse application (unrestricted irrigation requiring the highest class, versus more restricted uses at lower classes). Advanced-grade operators must understand how a plant's process train (secondary treatment, filtration, disinfection) i