Why Yangon Residential and Camp Projects Need a Containerized MBR
Containerized membrane bioreactors combine activated-sludge biology with submerged ultrafiltration inside a 20-ft or 40-ft high-cube ISO container, eliminating the secondary clarifier and shrinking the plot footprint — a direct answer to Yangon's tight residential land cost and the same constraint at NGO and construction camps on the city's peri-urban fringe. For camps, the skid is pre-engineered, factory-tested and shipped as a plug-and-play unit, which removes the need for on-site civil tank construction and shortens the path from delivery to first-treated-effluent.
The UF barrier is a physical one with pore sizes inside the 2–100 nm range, which the MENA-Water product page credits with a 99.9999% reduction of virus and bacteria, an effluent quality that fits reuse for landscape irrigation, toilet flushing or camp laundry without a polishing step in many cases. For a Yangon residential block or a 1,000-person displacement camp, that combination — small footprint, packaged delivery, near-potable effluent — is the technical case for selecting a containerized MBR over a poured-concrete conventional STP.
Step 1: Define the Design Population and Per-Capita Flow
Designers must separate the population into two streams: full-time residents on a stable daily routine, and peak-occupancy camp users (workers, students, displaced persons) whose day shifts through kitchens, showers and laundry rooms. Their hydraulic and organic loads diverge sharply, and a single averaged number will misrepresent both. Pure Aqua's MBR-C datasheet uses 50 gpd per capita as a planning figure, which is a vendor reference rather than a Myanmar regulatory value, so anchor your base number to it but then add load for any on-site canteens, communal laundry, school blocks or healthcare posts. Convert the gallons figure to cubic metres using the IDA Water Security Handbook conversion of 1 m³ = 264.2 US gallons, so 50 gpd per capita corresponds to roughly 0.19 m³ per capita per day before any peak or surge adjustment. Document the assumed per-capita number, the population split and the load sources in one place — this is the assumption a YCDC or donor reviewer will challenge first.
Step 2: Add the Right Peaking Factor for Yangon Conditions
Peaking factors account for morning and evening usage surges in residential blocks and shift-change loads in worker camps. For Yangon specifically, monsoon rainfall drives inflow and infiltration into the shallow collection networks that serve most peri-urban developments, so a conservative wet-weather peaking factor must be carried through into the membrane flux check rather than absorbed in the biological stage. The peaking factor also controls the equalization volume you specify upstream of the ISO container; without it, the membrane tank sees the wet-weather surge directly and the flux check fails. Document the chosen peaking factor and the rainfall return period you assumed — it is one of the most common points a reviewer will challenge on a Yangon submittal.
Step 3: Match the Plant to a Container Size and Membrane Type
Pure Aqua's MBR-C ships in 20-ft or 40-ft high-cube containers with submerged hollow-fiber UF modules at a 0.04 µm nominal pore size in TIPS PVDF — a proven configuration for municipal and industrial sewage. MENA-Water states that more than 1,200 m³/day can be filtered in one 40-ft ISO container using stainless-steel internal tanks, but most Yangon residential and camp projects fall well below that, usually in the 10–200 m³/day band where a single 20-ft unit is often sufficient. As an alternative, the DF series flat-sheet MBR module at 0.1 µm is available in 80–225 m² configurations producing 32–135 m³/day per set, with individually replaceable elements and an integrated aeration box — useful when the operator wants simpler maintenance and lower cross-flow energy use. Specify an anoxic zone ahead of the aeration tank where the discharge or reuse target requires denitrification; Pure Aqua lists this as a standard option on MBR-C, and the containerized MBR membrane bioreactor frame can house it without extending the ISO envelope.
| Parameter | Pure Aqua MBR-C (hollow-fiber) | DF series (flat-sheet) |
|---|---|---|
| Nominal pore size | 0.04 µm (≈40 nm) | 0.1 µm (≈100 nm) |
| Membrane material | TIPS PVDF hollow-fiber | Flat-sheet PVDF |
| ISO container options | 20-ft or 40-ft high-cube | Module sets integrated into skid/ISO frame |
| Indicative per-set capacity | Container-scale; MENA-Water cites >1,200 m³/day in a 40-ft ISO | 32–135 m³/day per set (80–225 m²) |
| Element replacement | Module-level | Individually replaceable flat-sheet elements |
| Anoxic zone option | Listed as standard option (denitrification) | Add as separate zone in skid |
Step 4: Check Power, Ambient Temperature and Effluent Targets
Pure Aqua's MBR-C is rated for 460V/3Ph/60Hz and an operating window of 68–86°F (20–30°C); a Yangon site must either be supplied with a step-down transformer or specified at 400V/3Ph/50Hz, and any sustained ambient above 30°C needs a flux derating because biological activity and membrane permeability both drift with temperature. The MENA-Water product literature places the UF pore range at 2–100 nm — MBR-C's 0.04 µm (≈40 nm) and the DF series' 0.1 µm (≈100 nm) are both UF-grade, so either will deliver very high bacterial and viral log reduction without an additional barrier. Tie the effluent target to the reuse end-use: irrigation of landscaping, toilet flush, or discharge to a YCDC sewer; camp projects often benefit from a chlorine dioxide generator or UV sterilizer polishing step for reuse confidence, sized to the post-MBR flow.
Step 5: Sizing Worksheet and Container Count
Use 1 m³ = 264.2 US gallons (IDA Water Security Handbook) to convert the design flow; for a 200-person residential block at 50 gpd per capita, base flow is roughly 10,000 gpd or about 37.8 m³/day before peaking. After a typical peak factor for Yangon wet-weather inflow, that 200-person block will require treatment capacity in the order of 50–60 m³/day, which is comfortably handled by a single 20-ft ISO MBR-C or by one DF module set producing 32–135 m³/day. A 1,000-person camp with kitchens and laundry should be sized from scratch rather than scaled from the residential figure, and may need a 40-ft unit or two 20-ft units in parallel to keep the membrane flux conservative. Always cross-check the chosen capacity against MENA-Water's reference that more than 1,200 m³/day fits in one 40-ft ISO container, to confirm you are well within the manufacturer's hydraulic envelope. The same workflow pattern is documented in the containerized MBR sizing workflow for Almaty and the Tokyo containerized MBR sizing guide, which both step through population → per-capita load → peaking → flux check → container count.
| Project type | Population | Base flow (50 gpd/cap, 0.19 m³/cap/d) | After Yangon peaking (illustrative) | Suggested container |
|---|---|---|---|---|
| Residential block | 200 | ≈37.8 m³/day | 50–60 m³/day | 1 × 20-ft ISO MBR-C, or 1 DF set (32–135 m³/day) |
| Mid-size residential | 500 | ≈95 m³/day | 120–140 m³/day | 1 × 40-ft ISO MBR-C, or 2 DF sets in parallel |
| Worker / NGO camp | 1,000 (kitchen + laundry) | ≥190 m³/day before surge | 240–300 m³/day | 1 × 40-ft ISO MBR-C, sized fresh rather than scaled from residential |
| Manufacturer reference envelope | — | — | Up to >1,200 m³/day | 1 × 40-ft ISO (MENA-Water) |
Step 6: Pretreatment, Sludge and Reuse Integration
Specify a drum screen or fine bar screen upstream of the MBR-C; Pure Aqua includes a 1.5 mm perforation drum screen as standard pre-treatment to protect the UF membranes from hair, fibre and grit that would otherwise foul the modules. Plan for sludge handling downstream of the MBR — for small Yangon residential and camp sites, a packaged plate-and-frame filter press or a lamella clarifier on the sludge line is typically the simplest fit, with a rotary mechanical bar screen protecting the sludge train. If the treated effluent is to be reused for irrigation or toilet flushing, add a polishing disinfection step such as a chlorine dioxide generator or UV sterilizer, sized to the post-MBR flow, and confirm the residual matches the reuse end-use.
Frequently Asked Questions
What per-capita flow should I use for a Yangon residential MBR?
Use a vendor planning figure such as 50 gpd per capita (≈0.19 m³/capita/day) as a starting point, then adjust upward for any on-site kitchens, laundry or schools and document the assumption. The exact number you adopt is less important than the load audit behind it, because the per-capita flow drives every downstream choice from equalization volume to container count.
Can a single 20-ft container handle a 200-person residential block?
Yes. A 20-ft ISO MBR-C or a DF series flat-sheet set producing 32–135 m³/day covers the typical 50–60 m³/day peak flow for a 200-person block after peaking. Confirm the chosen configuration against your peaking-factor assumption and the membrane flux envelope before locking the procurement order.
What is the realistic lead time for a containerized MBR STP shipped to Yangon?
Containerized plants are pre-engineered and pre-tested in the factory, so the critical path is sea freight to Yangon port plus customs clearance rather than on-site fabrication. Request the supplier's current production slot, the bill of lading schedule and the Myanmar import-duty classification for the skid before locking the project programme, because those three items drive the realistic handover date more than the build time.
How do I choose between hollow-fiber and flat-sheet MBR modules for a camp?
Hollow-fiber (0.04 µm, MBR-C) gives the highest packing density and is well proven in municipal sewage, while flat-sheet (0.1 µm, DF) is easier to maintain on a remote site because elements are individually replaceable, which matters for NGO and worker camps with limited operator skill. If your supplier shortlist is local or regional, also weigh the availability of spare elements and the service response time, since both module types are robust when supported and fragile when abandoned.
