| | Key Calculations | | ----------------------------- | ---------------------------------------------------- | | Preliminary Treatment | Screen opening area, headloss; grit chamber volume. | | Primary Clarifier | Surface overflow rate, weir loading, detention time, sludge volume. | | Biological Reactor | F/M ratio, SRT, MLSS, oxygen demand, aeration air flow, tank volume (Oxic/Anoxic/Anaerobic). | | Secondary Clarifier | Solids loading rate, return sludge flow, sludge blanket depth. | | Sludge Digestion | Digester volume, gas production, heating requirement. | | Tertiary / Disinfection | Chlorine/UV dose, contact tank size. | | Final Effluent Quality | BOD/TSS removal efficiency, nutrient reduction (N, P). |
Manual STP design is time‑prone to arithmetic errors and lacks rapid scenario testing. Software addresses these issues by: stp design calculation software
Some popular STP design calculation software includes: | | Key Calculations | | ----------------------------- |
Prices vary by region and distribution channel. | | Secondary Clarifier | Solids loading rate,