Core activated-sludge design parameters in one place: sludge age (SRT), food-to-microorganism ratio (F:M), volumetric BOD loading and hydraulic retention time — from your flow, influent BOD, aeration volume, MLSS and wasting rate.
| Process regime | F:M (d⁻¹) | SRT (days) |
|---|---|---|
| High-rate | 0.4–1.5 | 1–5 |
| Conventional | 0.2–0.4 | 5–15 |
| Extended aeration | 0.05–0.15 | 20–40 |
Send your influent analysis and our engineers assess your process and recommend a tailored treatment solution — free, confidential and no obligation.
Select the regulatory standard for your country — it sets which parameters we need for a compliance-aware process assessment.
Required parameters for the chosen standard are flagged on the sample form. You can still submit a partial set and we will advise what else to test.
Your sample is stored against your company so we can track the project. Provide a company name or email as a minimum.