[ Process Control Tools ]

The Operator's
Toolkit

Calculators, reference tables and field guides for wastewater treatment plant operators.

Open Calculators Reference Tables
27 Tools
·
12 Reference Tables
·
14 Field Guides
[ Toolkit ]

What's on the site

⚙
Calculators
27 tools
Activated sludge, hydraulics, solids and digesters.
  • SVI & Settleability
  • F/M Ratio, MCRT, RAS Rate
  • HRT, WOR, Surface Loading
  • Chemical Dosing, Mass Loading
  • VSR, VS Loading, Digester DT
  • 12 Formula Pie Wheels
Open Calculators →
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Reference
12 tables
The numbers I kept looking up: DO, pH, loading rates, conversions.
  • DO Operating Ranges by Zone
  • pH Targets by Process
  • Loading Rate Benchmarks
  • Temperature Effects
  • Common Unit Conversions
  • Alkalinity Targets & Consumption
  • Chemical Feed Reference
  • Oxygen Demand Factors
  • Biosolids Classification
  • Solids Production
  • Filamentous Organisms
  • Lab Methods Reference
View Reference →
⌬
Field Guides
14 guides
Day-to-day operations and troubleshooting.
  • Plant Startup
  • Upset Response
  • Seasonal Adjustments
  • Dewatering Operations
  • Digester Management
Read Guides →
[ Recently Updated ]
New Tool (Draft) Process Decision Matrix — Guided Troubleshooter New Guide Secondary Clarifier Troubleshooting New Guides Laboratory Methods Guides Updated Reference — 5 New Tables
[ About ]

Written
by an
operator

I'm an operator, and I use this on shift. Nobody sponsors it.

About the builder and how to contribute → Step-by-step contributing guide →