Start With the Right Three Inputs: Population, Per-Capita Flow, and Peaking Factor
Three inputs convert a headcount into a flow number that maps onto a standard containerized MBR model: design population, per-capita wastewater flow, and a peaking factor. The design population is peak occupancy, not the nominal number on a housing list. Labour and refugee camps fluctuate across shift changes, and residential compounds in Sharjah peak on weekends, holidays, and during the summer influx of visiting relatives. For sizing purposes, use the realistic maximum number of people who will be on site and producing wastewater at the same hour.
The per-capita flow basis depends on the project type. The Pure Aqua MBR-C datasheet uses 50 gallons per capita per day (≈ 190 L/p/d) as its published sizing basis for camp-style loads (S3, S5). Residential design codes in the region typically use a different litre-per-day figure that should be confirmed with Sharjah Municipality at the start of a project rather than carried over from a neighbouring emirate. If the authority figure and the supplier figure differ, the more conservative of the two should drive the calculation, and the basis used must be stated on the RFQ so all bidders are quoting against the same number.
Apply a peaking factor of 1.3 to 1.5 on top of the average daily flow to capture morning and shift surges; for camp-style occupancies, err toward the higher end because the peak-to-average ratio is sharper when many users share one kitchen and one ablution block. A worked example: 500 residents at 150 L/p/d produces 75 m³/d on average, which becomes 105 m³/d after a 1.4 peaking factor. That result sits between MENA-Water's MW-M75 and MW-M150 models in the published capacity table (S2) — a sizing decision point, not a single answer.
For Sharjah-specific context on labour accommodation rules and reuse compliance, the UAE industrial wastewater treatment cost and compliance guide sets out the local authority angles that any camp STP sizing calculation must be checked against.
Match the Daily Flow to a Standard MBR Package Plant Model
MENA-Water containerized MBR plants are published in 25, 75, 150, 300, 450, 600, and 1,000 m³/day per single unit (S1, S2), and the rule is to select the smallest standard model that covers the peaked flow once it has been rounded up. Up to 1,000 m³/day can be filtered in one 40-foot ISO container; higher capacities are reached through modular arrangement of multiple units on the same plot (S1, S2). That modular framing matters in Sharjah because many residential compounds and labour camps are built in phases, and a phased MBR layout avoids overcommitting the plot to a single oversized skid.
The package plant is delivered pre-assembled in ISO container format, with internal tanks in stainless steel, factory quality-tested, and intended as a plug-and-play installation (S1, S4). The scope of supply typically includes the raw wastewater pump station, pretreatment, biological treatment, membrane filtration, permeate storage, sludge treatment, and odour control, with a containerized operator room option (S2). Effluent from the MBR is suitable for irrigation reuse (no microorganisms, no smell) per the MENA-Water datasheet, which is directly relevant to Sharjah's landscaping irrigation reuse targets (S2).
Round up to the next standard model rather than downsizing. A 105 m³/d camp load should be specified against the MW-M150, not the MW-M75, because the smaller unit will run at capacity during peaks and leave no hydraulic headroom for population growth or morning surges. The MENA-Water datasheet notes that "other sizes on demand" are available (S2), so non-standard flows do not force a complete redesign, but each non-standard build is a longer lead-time item and should be confirmed in writing before it appears on a procurement schedule.
| Step | Input | Source / basis |
|---|---|---|
| 1. Design population | Peak occupancy, not nominal | Project-specific; confirm with Sharjah Municipality for camp permits |
| 2. Per-capita flow | ≈ 50 gpd (≈ 190 L/p/d) for camp loads | Pure Aqua MBR-C datasheet (S3, S5) |
| 3. Peaking factor | 1.3–1.5; use 1.5 for camps | Standard hydraulic practice for residential/camp STPs |
| 4. Peaked daily flow | Population × per-capita × peaking factor | Calculation result, e.g. 500 × 150 L × 1.4 = 105 m³/d |
| 5. Model selection | Smallest standard model ≥ peaked flow | MENA-Water 25–1,000 m³/d range (S1, S2) |
MENA-Water Containerized MBR — Model, Capacity, and Footprint Reference
The MENA-Water "Plant data for different throughputs" table (S2) links a standard containerized MBR model to an approximate population equivalent and a footprint. Bring this table into a site meeting or RFQ as the baseline; any non-standard population or plot constraint can then be discussed against the same reference.
| Model | Capacity (m³/day) | Approx. population (persons) | Footprint L × W (m) |
|---|---|---|---|
| MW-M25 | 25 | 166 | 7 × 2 |
| MW-M75 | 75 | 500 | 13 × 3 |
| MW-M150 | 150 | 1,000 | 14 × 4 |
| MW-M300 | 300 | 2,000 | 16 × 5 |
| MW-M450 | 450 | 3,000 | 18 × 6 |
| MW-M600 | 600 | 4,000 | 22 × 6 |
| MW-M1000 | 1,000 | 6,600 | 28 × 6 |
Other sizes are available on demand, so a flow that does not land on one of the seven standard models does not require a complete redesign (S2) — ask the supplier to confirm the non-standard lead time and price premium before signing. For a tropical-climate comparison point, the Colombo containerized MBR sizing guide walks the same MENA-Water model table through a different ambient envelope.
Sharjah-Specific Sizing Overlays: Climate, Container Layout, and Reuse
Four Sharjah-specific overlays determine whether the unit performs in service. The design temperature envelope is critical: the Pure Aqua MBR-C datasheet specifies an operating range of 20–30°C with a design temperature of 20°C (S3, S5). In Sharjah's summer, ambient and feed temperatures regularly exceed 30°C, so determine with the supplier whether enclosure shading, ventilation, or influent cooling is required, and at whose cost.
The second overlay is the container layout. MENA-Water offers two configurations (S1): the I-Version is fully integrated inside the ISO container, which is the right choice for mobile camps where the plant must be lifted and shifted. The U-Version keeps mechanical equipment inside the container but puts aeration and buffering in underground water tanks, which reduces the visible footprint on a residential compound. Both versions share the same membrane and biological process, so the choice is plot-driven, not treatment-driven.
The third overlay is the reuse target. The MBR membrane reduces viruses and bacteria by 99.9999% (S1) / 99.999% (S2), and the Pure Aqua MBR-C uses ultrafiltration at a 0.04 µm pore size (S3), so the permeate is microbiologically suitable for landscape irrigation. Before sizing the permeate storage tank, confirm with Sharjah Municipality the permitted reuse boundaries — what can be irrigated, what signage is required, and whether the buffer tank needs to be sized for a specific number of irrigation days at peak summer evapotranspiration. The final overlay is electrical compatibility: the MBR-C datasheet specifies 460V/3Ph/60Hz (S3, S5), which should be matched against the UAE grid supply at the proposal stage to ensure any transformer or wiring change is priced early.
For a Sharjah buyer comparing equipment configurations, the HydropureWater integrated MBR membrane bioreactor system describes a comparable integrated package concept, and the HydropureWater DF series flat sheet MBR membrane module is the replacement-membrane reference that the supplier should be asked to match.
Validate the Footprint, Logistics, and Expansion Path on the Sharjah Site
Pressure-test the chosen model against the actual Sharjah plot before issuing a PO. The MENA-Water reference (S2) gives a footprint per model: MW-M150 is 14 × 4 m (56 m²), MW-M300 is 16 × 5 m (80 m²), and so on. The plot must accommodate the container, the feed/buffer tank, the permeate storage, a truck access lane for desludging, and a setback from any accommodation block. The standard ISO container format simplifies road or sea transport into Sharjah and allows the unit to be relocated if the camp moves (S1).
Plan modular expansion up front. A 300 m³/d requirement that may double in three years is cheaper and lower-risk to specify as 2 × MW-M150 than as a single oversized unit, because the second unit can be commissioned only when population growth materialises (S1, S2). MENA-Water FZC operates from Plot D3-11, SAIF Zone, Sharjah (S2), which is relevant for local service response, spares holding, and commissioning support — ask the supplier in writing to confirm the local spares list and the maximum response time for a service engineer on a Sharjah site.
Frequently Asked Questions
What is the minimum population that justifies a containerized MBR over a packaged septic tank in Sharjah?
The MENA-Water capacity range starts at the MW-M25, published at 25 m³/day and approximately 166 persons (S2). Below that loading, a packaged septic or a smaller packaged STP is usually the more cost-effective route. The exact break-even depends on the discharge consent and reuse targets, not just the headcount, so request a written comparison from the supplier covering both options before specifying.
What is a realistic budget range for a containerized MBR STP in Sharjah, and what drives the price?
The published MENA-Water range (S2) lists standard models from 25 to 1,000 m³/day but does not include a price list, so the supplier must be asked for a quotation against the specific model, the I-Version or U-Version choice (S1), and the influent temperature envelope (S3, S5). Request a line-item quotation that separates the container, the membrane modules, the buffer/permeate tanks, electrical works, and commissioning.
How do I verify a supplier's Sharjah track record before placing the order?
Ask the supplier for a reference list of installed containerized MBR plants in Sharjah and the wider UAE, including model, capacity, year of commissioning, and a contact at the operating site. MENA-Water FZC's Sharjah office is in SAIF Zone (S2), which supports local service, but on-the-ground performance at a comparable camp is the test that matters — request a site visit to a working reference before signing.
What lead time should I plan for a Sharjah delivery, and what affects it?
Standard models in the 25–1,000 m³/day range (S1, S2) are published as having fast delivery and
