MBR combines activated sludge biological degradation with membrane separation, replacing the secondary clarifier with membrane modules for sludge-water separation. It can operate at higher sludge concentrations, and the effluent has low turbidity and can be directly used as feed for reuse or downstream membrane systems.
Process Principle
- The biological section maintains a higher mixed liquor suspended solids concentration, improving volumetric loading and shock resistance.
- Membrane modules perform solid-liquid separation, replacing the secondary clarifier and are not limited by sludge settling performance.
- Membrane fouling is controlled through regular backwashing, aeration scouring, and chemical cleaning to maintain stable flux.
Product Features
- The effluent has low turbidity, and suspended solids are almost completely retained, allowing direct connection to reverse osmosis and other advanced treatment.
- High sludge concentration and a small footprint make it suitable for projects with limited land or requiring upgrading and capacity expansion.
- A long sludge age favors nitrifier enrichment and provides relatively stable ammonia nitrogen removal.
- Relatively low excess sludge production reduces the burden of subsequent sludge disposal.
Application Industries
- Upgrading and reclaimed water reuse for integrated industrial park wastewater and municipal wastewater.
- Treatment of high-concentration organic wastewater from food, beverage, and brewing.
- Biological-stage treatment of refractory wastewater such as landfill leachate and livestock wastewater.
- Modular treatment station for decentralized, small town, and scenic area wastewater.
Specifications and Models
| Parameter | Unit | Typical value |
|---|---|---|
| Membrane module type | — | Hollow fiber / flat sheet membrane |
| Membrane pore size | μm | 0.03–0.4 (typical value) |
| Mixed liquor suspended solids (MLSS) | mg/L | 6000–12000 (typical value) |
| Membrane flux | L/(m²·h) | 15–30 (typical value) |
| Effluent turbidity | NTU | ≤ 1 (typical value) |
| Effluent SDI₁₅ | — | ≤ 5 (typical) |
The data in the table are common ranges for similar equipment and are for selection reference only; specific specifications, models, materials, connections, and control methods must be confirmed during the selection stage based on water quality, treatment scale, and site conditions.