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Featured · Thin-film composite flat-sheet MBR
Swing MBR: flat-sheet toughness, close to a hollow-fiber footprint.
Dense thin-film composite sheets in replaceable cartridges, scoured continuously with coarse bubble. Swing drops into existing tanks, services one cartridge at a time. Tell us your domestic-content requirements and we'll review what we can document.
What we do in Poughkeepsie: In our Poughkeepsie shop we build frames and assemble units.
Free design
Send us your tank. We'll lay out the Swing modules.
Application, flow and a few notes on the tank or site — that's all we need to suggest a Swing module size, membrane area and air scour.
Why owners pick Swing
Six reasons.
Footprint close to hollow fiber
Thin sheets give the density: 114 sheets per Swing-8 cartridge, 208 per Swing-9. Existing tanks often take Swing one-for-one.
Thick, durable sheet
A composite sheet on PET non-woven with a PP filtrate channel. Strong wide membrane welds hold the sheet together in normal MBR duty.
Swap a cartridge, not a module
Pull and replace one cartridge. A module breakdown takes about two hours.
Domestic-content requirements
Tell us your domestic-content requirements and we'll review what we can document. Schedule 80, US pipe sizes, ANSI-flanged connections.
Buy or rent
Own Swing outright, or rent modules for added capacity or a demonstration on your own mixed liquor.
Coarse-bubble scour
Continuous coarse-bubble scour between every sheet. Coarse bubbles keep the channels open.
How it works
Sheet → cartridge → module → tank.
The membrane
PVDF, or PVDF with graphene, as a thin-film composite on PET non-woven with a PP filtrate channel. The sheet is a permanently wetted dry film: it ships, handles and stores dry — never wet it in the shop.
The cartridge
Swing-8: 114 sheets, 135 ft² (12.5 m²), 21 × 20 × 9.9 in (528 × 520 × 252 mm), 24.9 lb (11.3 kg) dry. Swing-9: 208 sheets, 248 ft² (23 m²), 38.4 lb (17.4 kg) dry. Sheets are 9.8 × 9.8 in (250 × 250 mm). Pore: 0.04 µm UF standard, 0.4 µm MF available.
Scour and cleaning
Continuous coarse-bubble scour for MBR. Runs 8 minutes on, 2 minutes off. CIP is reverse-fed with relaxation using sodium hypochlorite then citric acid. Backwashing is not a standard Swing operating mode and is not meant for routine use. Swing has been pressure-tested to 14.5 psi (1 bar) and held without breaking. If a site is in a bind even after relaxation and CIP, contact us; we may be able to work out a special mild-backwash procedure.
Thin film (Swing) vs plate (Palisade)
| Feature | Swing thin film | Palisade plate |
|---|---|---|
| Construction | Flexible thin-film sheets in small cartridges | PES welded onto solid polypropylene plates |
| Weight and packing | Light cartridges, high packing density | Heavier rigid plates, moderate density |
| Replacement | Replace a cartridge quickly, in minutes, without pulling the whole module | Individual plates, with the module lifted |
| Spacing | 0.16 or 0.31 in (4 or 8 mm) centers | Set by plate thickness |
| Element thickness | About 0.028 in (0.7 mm) | About 0.31 in (8 mm) |
| Owner maintenance | Sheets stay sealed in small, cost-effective cartridges; swap the whole cartridge quickly in-house | In-house plate replacement with more handling time |
| Welds | Strong wide membrane welds | Strong wide membrane welds |
More detail: thin film vs plate MBR membranes.
Model naming
Read the name: Swing-8-X-Y.
- 8 or 9 — the cartridge type (Swing-8 = 135 ft² (12.5 m²), Swing-9 = 248 ft² (23 m²)).
- X — decks, stacked vertically. Up to 4 decks per section is standard.
- Y — columns, side by side.
- Area — Swing-8: 12.5 × X × Y m². Swing-8-2-4 = 8 cartridges = 1,080 ft² (100 m²).
Selected models
Swing range: 12.5 to 11,900 ft² (1,104 m²).
| Model | Decks × columns | Area | L × W × H (mm) | Dry weight | Municipal net capacity* |
|---|---|---|---|---|---|
| Swing-8-1-1 | 1 × 1 | 135 ft² (12.5 m²) | 500 × 700 × 1,230 | 101 lb (46 kg) | 1,160 gpd (4.4 m³/d) |
| Swing-8-2-4 | 2 × 4 | 1,080 ft² (100 m²) | 1,250 × 700 × 1,830 | 379 lb (172 kg) | 9,250 gpd (35 m³/d) |
| Swing-8-2.5-8 | 2.5 × 8 | 2,690 ft² (250 m²) | 2,300 × 700 × 2,160 | 822 lb (373 kg) | 23,100 gpd (87.5 m³/d) |
| Swing-8-3-8 | 3 × 8 | 3,230 ft² (300 m²) | 2,300 × 700 × 2,430 | 974 lb (442 kg) | 27,700 gpd (105 m³/d) |
| Swing-8-6-8 | 6 × 8 (two sections) | 6,460 ft² (600 m²) | 2,400 × 700 × 4,250 | 1,480 lb (670 kg) | 55,500 gpd (210 m³/d) |
| Swing-9-1-1 | 1 × 1 | 248 ft² (23 m²) | 400 × 1,100 × 1,230 | On quotation | 2,140 gpd (8.1 m³/d) |
| Swing-9-4-12 | 4 × 12 | 11,900 ft² (1,104 m²) | 3,300 × 1,100 × 3,000 | On quotation | 102,000 gpd (386 m³/d) |
*Listed municipal net capacity is the published technical-manual net (8.6 gal/ft²·d / 0.35 m³/m²·d). Wastewater design flux is 9–12 GFD (15–20 LMH), peak 15 GFD (25 LMH). Septic and low oversight is 6 GFD (10 LMH) or less. Lower flux means longer membrane life and more time between cleanings. Zyramic confirms design capacity on the project. Many more X-Y combinations are available.
Sizing guidance
Size flux to the membrane life you want.
Wastewater design flux is 9–12 GFD (15–20 LMH), with a peak of 15 GFD (25 LMH), the same for all Zyramic products. Septic and low-oversight duty is 6 GFD (10 LMH) or less. Lower flux means longer membrane life and more time between cleanings.
These are Zyramic design guidance values. Your project proposal sets the design flux for your feed.
Air scour
Specific air falls as decks are added.
| Decks | Specific air (approx.) |
|---|---|
| 1 | ~13.5 L/min·m² |
| 2 | ~9.0 L/min·m² |
| 3 | ~6.5–7 L/min·m² |
| 4 | ~5.5–6 L/min·m² |
The same air lifts mixed liquor through a taller stack. MBR duty uses continuous coarse-bubble scour; UF duty uses intermittent scour at about twice the MBR air. Air is confirmed per project.
Tall modules
Going taller: four design rules.
- Up to four decks per section — our standard field practice.
- Beyond four decks, stack sections with a gap between them.
- Enclose all four sides so mixed liquor circulates bottom to top through every section.
- Feed scour air to every section so each one is scoured top to bottom.
Submerge with more than 50 cm of liquid above the membrane top (more than 30 cm on small modules). Allow 40–60 cm between modules.
Retrofit & footprint
Often a 1:1 retrofit in your existing tanks.
Swing's footprint is close to hollow fiber, so existing tanks often take Swing one-for-one with new permeate plumbing and guide rails. You keep your concrete and gain coarse-bubble scour, cartridge service and uptime.
How Swing keeps MBR running smoothly
| What operators want | How Swing delivers it |
|---|---|
| Clean, open membrane channels | Open flat channels, continuous scour |
| Steady scour at high MLSS and with chemical P removal | Coarse-bubble scour resists plugging |
| A sheet that stays bonded through pressure swings | Thick composite sheet, no routine backwash |
| Short, planned service windows | Cartridge swap in about two hours |
Cleaning
CIP chemicals, plainly.
| Clean | Chemical | Dose | When |
|---|---|---|---|
| Maintenance (municipal) | Sodium hypochlorite or citric acid | NaClO 300–500 mg/L or citric 500–1,000 mg/L · 2.0 L/m² · >30 min | Every 7–10 days |
| Recovery (municipal) | Sodium hypochlorite, then citric acid | NaClO 3,000–5,000 mg/L, then citric 1–2% · each 2.5 L/m² · >4 h | TMP up ~2.9 psi (20 kPa), or every 6 months |
| Recovery (industrial) | Sodium hypochlorite, then citric acid | NaClO 5,000 mg/L, then citric 2% | Per project |
Hypochlorite removes organics and biofilm; citric acid removes scale. Always purge residual hypochlorite before the acid step. Confirm the site recipe with Zyramic.
Swing parts
Replacement cartridges S-20 to S-24 for Swing-8 and Swing-9, plus guide rails and lifting tools.
Swing parts →Put Swing in your tank.
Send flow, MLSS and tank drawings — we size Swing for your plant.