The Bardenpho Process: Advanced Biological Nutrient Removal

The Bardenpho Process is one of the most effective biological nutrient removal systems used in modern wastewater treatment. This video covers how the five-stage process achieves nitrogen and phosphorus removal through a precise sequence of anaerobic, anoxic, and aerobic zones. 📖 FULL WRITTEN GUIDE (free): https://wastewaterace.com/blog/barden... Goes deeper than this video on: • Four-stage vs. five-stage — what the anaerobic zone actually adds • Nitrification and denitrification stoichiometry — 4.57 g O₂, 7.14 g alkalinity destroyed, 3.57 g recovered • Why nitrifiers set your SRT (10–20× slower than heterotrophs) • Design ranges: internal recycle 2–4Q, SRT, zone retention times • Secondary release — the failure mode that specifically defeats five-stage plants, and how to diagnose it • Operator troubleshooting tables for both the nitrogen and phosphorus sides Sourced to the EPA Nutrient Control Design Manual (EPA/600/R-09/012). STUDY GUIDES FOR OPERATOR CERTIFICATION Activated Sludge: Bugs, Basins & Beyond — 150 questions incl. a full nutrient removal subtopic https://wastewaterace.com/guides/acti... All guides: https://wastewaterace.com/study-guides/ #wastewater #bardenpho #nutrientremoval #wastewateroperator #activatedsludge