01
Applications & Common Challenges
- For capacity growth, changed requirements, unstable effluent, high chemical/sludge use, odour or repeated failures.
- Flow/load mismatch, mixed sources, ageing equipment, drifting instruments and incomplete controls often interact.
- Some constraints can be resolved by operational and control changes without a major build.
02
Information Needed Before Design
- Six to twelve months of influent/effluent, flow, chemicals, sludge, energy, alarm and downtime records.
- PFD/P&ID, equipment/instrument list, tank volume, pump/valve data, control program, discharge requirements and prior corrective work.
- Time- and source-based sampling, data before/after key units, peak conditions and incident history.
- Available space, bypass, shutdown allowance and future capacity.
03
Typical Process Logic
- Desktop review & survey → hydraulic/load balance → staged performance tests → bottleneck/risk register → operational optimisation or phased retrofit → integrated commissioning & verification.
- Options may include source segregation, equalization, reaction/dosing changes, aeration/sludge repair, polishing or control upgrade.
04
Instrumentation & Control
- Validate flow, level, pH/ORP/DO and other critical instruments; diagnose trends rather than isolated readings.
- Review pump rotation, dosing, sludge, blowers and abnormal-flow interlocks with traceable alarms and run-hour records.
05
Risks & Project Boundaries
- Conclusions depend on record quality and representative sampling; continuous monitoring or trials may be required.
- Define live-plant work, temporary treatment, civil safety, old-equipment disposal and ownership of control source code.
- Tie every upgrade target to sampling point, method, assessment period and applicable requirement.