Package Membrane Bioreactor (MBR) — 100 m³/day
At a glance
- Application: Municipal wastewater → water suitable for washing/irrigation and as RO feed for Class A recycled water production
- Capacity: 100 m³/day
- Train: Balance tank → 1 mm fine screen → Anoxic → Aerobic → MBR (submerged hollow-fiber) → Post-chlorination (as required)
- Performance: ≥95% COD removal, ≈90% total nitrogen (TN) removal
- Standards: Designed to Australian standards and local regulatory requirements
- Design validation: BioWin® dynamic process modelling used to validate sizing, kinetics, and operating setpoints
- Hydrodyna role: In-house process design, project management, procurement, commissioning
Objectives
Deliver a compact, reliable package plant that consistently produces high-quality effluent for non-potable reuse and as stable RO feed for Class A recycled water schemes.
Solution
- Biological process: Anoxic–aerobic MBR with submerged hollow-fiber membranes for solids separation and pathogen barrier.
- Pretreatment: Balance tank for equalisation and surge damping; 1 mm fine screen to protect downstream units.
- Chemical systems: Automatic chemical dosing for nutrient control and membrane protection; CIP system for periodic membrane recovery.
- Monitoring & controls: Continuous ORP, pH, MLSS, DO, free chlorine, turbidity; PLC-based control with alarms and trending.
- Solids handling: Sludge collection and wasting provisions sized for stable SRT and low carryover.
Design assurance (in-house + model-validated)
- In-house engineering: All process sizing, P&IDs, and control logic developed by Hydrodyna engineers.
- BioWin® validation: Dynamic simulations across seasonal temperatures and load/flow swings to confirm COD/TN removal targets, oxygen demand, sludge age, membrane flux/air-scour envelopes, and CIP frequency—de-risking commissioning and operations.
Performance & resilience
- Treatment efficiency: ≥95% COD removal and ~90% TN removal, producing clear, low-turbidity effluent suitable for washing/irrigation and as RO feed.
- Operational stability: Proven ability to damp fluctuations in influent flow, temperature, COD, and TN, maintaining membrane flux and effluent quality.
- Membrane health: Optimised aeration and CIP regime to limit fouling and extend membrane life.
Outcome
A compact, plug-and-play MBR that meets Australian requirements, provides dependable reuse-quality water, and integrates seamlessly upstream of RO for Class A recycled water production—reducing risk, footprint, and lifecycle cost for municipal clients.
