MBBR Component Specifications
Standard materials and specifications for Tomorrow Water MBBR systems. Custom configurations available upon request.
| Component | Material / Standard | Specification |
|---|---|---|
| BIOFILM MEDIA SYSTEM | ||
| Biofilm Media Carriers |
HDPE High-Density Polyethylene |
Specific surface area: 500 m2/m3 Specific gravity: 0.95–0.97 Media fill ratio: 30–65% Operating temp: 5–40°C |
| Media Retention Screens |
SS304 Stainless Steel 304 |
Wedge-wire or perforated plate construction Screen opening: 8–12 mm Full reactor cross-section coverage Self-supporting frame |
| AERATION SYSTEM | ||
| Fine Bubble Diffusers |
EPDM Membrane Non-Clog Design |
Bubble size: 1–3 mm SOTE: 6–8% per meter submergence Air flux: 0.5–2.0 Nm3/hr per diffuser Anti-backflow check valves included |
| Aeration Piping & Headers | SS304 / CPVC |
Schedule 10 SS304 headers (standard) Flanged connections |
| Air Blower |
Oil-Free Rotary Lobe or High-Speed Turbo |
Discharge pressure: 5–8 psig Oil-free operation (standard) VFD control available TEFC motor enclosure |
| Aeration Control | DO Probe + Automated Controls |
Dissolved oxygen setpoint: 2–4 mg/L 4–20 mA analog output SCADA-ready signal output Manual override capability |
| REACTOR TANK | ||
| Tank — Carbon Steel / Epoxy | CS + Epoxy Lining |
ASTM A36 carbon steel - Most economical option for large-volume reactors Interior: 20–25 mil epoxy coating Exterior: Primer + finish coat Designed per AWWA D100 / API 650 |
| Tank — FRP (Fiberglass) |
FRP Fiberglass Reinforced Plastic |
ASTM D3299 / D4097 - Ideal for corrosive or chemical wastewater streams Corrosion barrier liner: C-glass / Nexus Wall thickness per pressure & vacuum rating UV-resistant outer layer |
| Tank — Stainless Steel | SS304 / SS316L | 304 standard; 316L for high-chloride environments |
Typical MBBR System Capacity Ranges
| Flow Range | Reactor Volume (Total) | No. of Reactors | Approx. System Footprint | Air Flow (SCFM) | Blower Power | Typical BOD Removal |
|---|---|---|---|---|---|---|
|
10,000 – 30,000 GPD 38 – 114 m³/day |
2,500 – 7,500 gal 9.5 – 28 m³ |
1 – 2 |
10' × 8' – 16' × 10' per reactor |
30 – 100 | 3 – 10 HP | 90 – 95% |
|
30,000 – 50,000 GPD 114 – 189 m³/day |
7,500 – 12,500 gal 28 – 47 m³ |
2 – 3 |
16' × 10' – 20' × 12' per reactor |
100 – 175 | 10 – 20 HP | 90 – 95% |
|
50,000 – 100,000 GPD 189 – 379 m³/day |
12,500 – 25,000 gal 47 – 95 m³ |
2 – 4 |
20' × 12' – 26' × 14' per reactor |
175 – 350 | 20 – 40 HP | 90 – 95% |
|
100,000 – 250,000 GPD 379 – 946 m³/day |
25,000 – 62,500 gal 95 – 237 m³ |
3 – 6 |
26' × 14' – 32' × 16' per reactor |
350 – 900 | 40 – 90 HP | 90 – 95% |
|
250,000 – 500,000 GPD 946 – 1,893 m³/day |
62,500 – 125,000 gal 237 – 473 m³ |
4 – 8 |
32' × 16' – 40' × 20' per reactor |
900 – 1,800 | 90 – 180 HP | 90 – 95% |
|
500,000+ GPD >1,893 m³/day |
125,000+ gal 473+ m³ |
6 – 12+ | Custom — multi-train configuration | 1,800+ | 180+ HP | 90 – 95% |
Design Basis: Values based on hydraulic retention time (HRT) of 6–8 hours and food & beverage influent BOD of 500–1,500 mg/L. Municipal or lower-strength wastewater (<300 mg/L BOD) will result in smaller reactor volumes for the same flow rate. | Media Fill: 40–55% by volume (standard). | BOD Loading Rate: 2–5 kg BOD/m³·day (food & beverage). | All systems are custom-engineered to site-specific flow, loading, and permit conditions. Contact Tomorrow Water for a site-specific sizing and budgetary proposal.