Containerized Plant Fabricators
ISO-container fabricators packaging full treatment trains for off-grid, emergency, and rapid-deploy projects.
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Buyer's guide
The buyer's guide to containerized plant fabricators
Containerized Water Treatment Fabrication: Modular Plants in ISO Containers
Containerized fabrication places complete water and wastewater treatment plants inside 20 ft, 40 ft, or 40 ft HC ISO containers (CSC-certified per ISO 1496-1) for plug-and-play deployment to remote, temporary, or rapid-mobilization sites. Capacities range from 5 m³/day (single 20 ft potable RO unit) to 5,000 m³/day (multi-container ZLD trains). Typical applications: oil-and-gas field water treatment, emergency disaster response, military forward bases, mining camp water supply, construction-site sewage, rural water supply, and pilot/demonstration plants for new technology de-risking.
Fabrication workflow: 3D plant-design CAD modeling, factory assembly with 100% pre-commissioning (hydrostatic, electrical, controls FAT) before shipment, road/sea transport to site, site-installation 1–7 days, commissioning 7–30 days. Internal layout maximizes serviceability: walk-in clearances 600+ mm aisles, equipment on common skids accessible via roof hatches or end doors, all valves/instruments labeled per ISA 5.1. Insulation (50–100 mm rockwool) and HVAC for cold-climate (−40°C) or hot-climate (+50°C) operation. Power options: grid 380–480 VAC 3-phase, on-board diesel genset, or solar+battery hybrid.
Standards: ISO 668/1496-1 for container structural integrity, ATEX/IECEx Zone 1 for hydrocarbon-presence sites, NSF/ANSI 61 for potable water contact, EN 1717 for backflow prevention, ASME BPVC Section VIII for pressure vessels, IEC 61439 for electrical assemblies. Pre-tested at factory then shipped reduces site commissioning from 6–18 months (stick-built) to 2–6 weeks. Aguato lists containerized-fabrication shops across desalination (BWRO/SWRO), MBR, sewage treatment, drinking water, and produced-water sectors with global delivery references.
Frequently asked questions
What capacity range fits inside a single ISO container?
20 ft container (33 m³ internal): up to 50 m³/day BWRO, 25 m³/day SWRO, 100 m³/day MBR, 150 m³/day clarifier-based potable. 40 ft container (67 m³ internal): up to 200 m³/day BWRO, 100 m³/day SWRO, 500 m³/day MBR, 800 m³/day rapid sand filtration. Multi-container trains (2–8 containers) deliver 5,000+ m³/day across desalination, MBR, and ZLD. Sizing limit is typically not the water capacity but the auxiliary equipment (chemical day tanks, blower noise enclosure, MCC clearance); these often spill over into additional containers.
How does containerized cost compare to stick-built?
Containerized plants typically cost 10–25% more than equivalent stick-built per m³/day capacity due to space-optimization premium and factory overhead allocation. However, total project cost (TIC) is usually 15–40% lower: 60–80% reduction in site civil works, 70–90% shorter site labor, 50–70% shorter commissioning, and pre-tested reliability reduces commissioning risk premium. The lifecycle TCO crossover vs. stick-built is at ~$3–8M project size, below which containerized always wins. Above $20–30M, stick-built becomes more competitive on capex but loses on schedule.
What is the typical lifecycle of a containerized treatment unit?
Process equipment lifecycle inside container matches stick-built: RO membranes 5–10 years, pumps 10–25 years, instrumentation 15–25 years, structural steel 30–50 years. Container shell (CSC-certified ISO box) has 25–30 year service life with periodic exterior recoating every 10–15 years to prevent corrosion. Modular replacement (swap-out failed container with refurbished unit) is the deployment-flexibility advantage: typical refurbishment cost 30–50% of new build, vs. 80–100% for stick-built major overhaul.
Can containerized plants meet drinking-water and discharge standards?
Yes. Properly designed containerized plants meet US EPA SDWA, EU DWD 2020/2184, WHO Guidelines, and equivalent discharge standards (US NPDES, EU UWWTD). The certification path includes: all wetted parts NSF/ANSI 61 for potable contact, factory acceptance test (FAT) per ASME/ISO 9001 with documented hydrostatic, electrical, controls, and process performance testing, site acceptance test (SAT) after installation with a 30-day reliability run, and regulatory compliance sampling against permit limits. Pre-tested factory builds are often more compliance-reliable than stick-built construction because of the controlled fabrication environment.
Illustrative scenario · Remote mining camp, Western Australia, 1,800 workers, no mains water or sewer connection
A composite drawn from typical projects in this category, not a single client engagement. Figures are indicative.
- Challenge
- A mining camp 380 km from the nearest regional town required a self-contained water and wastewater solution for 1,800 workers. Raw water was a saline groundwater at 3,800 mg/L TDS. Sewage had to meet Australian state discharge standard of BOD below 20 mg/L and TSS below 30 mg/L. All equipment had to be operational within 12 weeks of order.
- Approach
- Three 40-foot BWRO containers (combined 900 m3/day capacity, 78% recovery) and two 40-foot MBR containers (combined sewage treatment at 180 m3/day) were factory-built and FAT-tested in Western Australia before transport. Installation on concrete pads was completed in 4 days. Commissioning and reliability run took 18 days.
- Outcome
- Potable water delivered at TDS 95 mg/L, meeting WHO GDWQ. Sewage effluent averaged BOD 7 mg/L, TSS 11 mg/L. Both systems were in full compliance from day 22 post-arrival on site. Total project time from order to compliance was 11 weeks. Capital cost was 22% lower than equivalent stick-built design estimated at tender stage.
Questions to ask shortlisted providers
5
- 01
What factory acceptance test (FAT) protocol do you conduct before shipping, and can we witness it?
FAT is the last opportunity to detect installation errors, instrumentation failures, and process performance gaps before equipment is shipped. Vendors who do not offer witnessed FAT are transferring all commissioning risk to the site. FAT should include a full process performance run at design flow for minimum 8 hours.
- 02
What site access and ground preparation do you require, and what civil works are outside your supply scope?
Many containerized system failures arise from undefined scope boundaries. Vendors should specify exactly what civil works (concrete pads, bund walls, electrical supply point, drainage connection) are the client's responsibility, with dimensional and load specifications provided at contract award.
- 03
How is the container insulated and heated/cooled for our site temperature range, and what is the guaranteed operating range?
Containerized plants designed for temperate climates can suffer pipe freeze failures in arctic deployments or control-system overheating in desert environments above 45 degrees C. Operating temperature range, insulation specification, and HVAC sizing must be explicitly guaranteed for the site-specific climate extremes.
- 04
What spares package is included and what is the lead time for the most critical spare parts?
In remote deployments, a failed dosing pump diaphragm or UV lamp can shut down a plant for weeks if spares are not on-site. Vendors should specify the recommended 2-year spares package at contract stage, including duty/standby pump heads, UV lamps, membrane elements, and control system components.
- 05
What remote monitoring and SCADA capability does the plant include, and does it support GSM/satellite connectivity for remote sites?
Remote camps without a resident instrument technician need plant SCADA accessible via satellite or GSM to allow remote diagnostics. Vendors without remote monitoring shift all fault-diagnosis cost to the client, requiring on-site technical visits at GBP 3,000 to GBP 10,000 per visit including travel.
What drives cost in this category
4
- Factory fabrication and integration versus site-assembled equivalent
- Containerized plants cost 10 to 25% more per m3/day capacity in equipment cost than site-assembled equivalents. However, factory assembly eliminates 60 to 80% of site labour and 50 to 70% of commissioning duration, typically delivering 15 to 35% lower total installed cost (TIC) for projects below GBP 8M.
- Shipping and transport to remote site
- International sea freight for a 40-foot container runs USD 2,000 to USD 8,000 per container (port to port). Road transport from port to remote site can add USD 3,000 to USD 20,000 per container depending on distance, road quality, and permits for oversized loads. Shipping cost is proportionately highest for the smallest plants.
- ATEX and hazardous area equipment specification
- Oil-and-gas and mining sites with ATEX Zone 1 or Zone 2 classification require ATEX-rated electrical equipment (motors, instruments, control panels), adding 20 to 40% to electrical capital cost. Non-ATEX equipment on a Zone 1 site is a criminal safety breach under DSEAR 2002.
- On-site civil works (concrete pads, bunds, drainage, electrical supply point)
- Civil works for a 3-container potable plant (3 concrete pads, secondary containment bund, drainage, earthing) typically cost GBP 40K to GBP 120K. These are frequently excluded from containerized plant supply scope and must be budgeted separately by the client.
Key regulations and standards
4
- ISO 1496-1:1990 Series 1 Freight Containers Specification and Testing
- Containerized plants shipped by sea must be transported in ISO 1496-1 certified containers that have been structurally modified with engineering calculations and load-testing documentation. Non-certified containers may be refused at ports or require additional structural inspections.
- DSEAR 2002 (Dangerous Substances and Explosive Atmospheres Regulations)
- UK sites with flammable or explosive atmospheres (oil-and-gas, ATEX Zone 1 or 2) require all electrical equipment in the hazardous zone to be rated to ATEX Directive 2014/34/EU categories. Containerized plants supplied to ATEX zones require a Site ATEX document and equipment group/category certification.
- WRAS Approval and DWI List of Approved Products
- All wetted materials in potable water containerized plants for UK applications must carry WRAS approval or be on the DWI approved products list. This includes membranes, housings, pipework, valves, gaskets, and chemical dosing wetted parts. Non-approved materials require DWI risk assessment before use.
- UK Water Supply (Water Quality) Regulations 2016
- Containerized plants supplying drinking water in England and Wales must comply with WS(WQ)R 2016 in terms of water quality parameters. DWI must be notified of any new water supply undertaking, including temporary or emergency containerized supplies lasting more than 30 days.