BWC100 Containerized Brackish Water Reverse Osmosis System
In small-scale water-consuming scenarios (such as island residential areas and small agricultural bases) where brackish water is widely distributed but fresh water resources are scarce, compact and efficient integrated desalination equipment is key to meeting water demand. The FENIGAL BWC100 Containerized Brackish Water Reverse Osmosis System, with a 20ft standardized container as its carrier, integrates a full set of core components for brackish water desalination. Relying on advantages such as flexible deployment, stable water production and low energy consumption, it provides a professional solution for small-scale brackish water desalination needs.
As the basic containerized model for small-scale brackish water desalination in the Desal BWC series, the BWC100 integrates all core modules (pretreatment system, reverse osmosis unit, chemical cleaning and dosing system, electrical control unit) into one 20ft standardized container. No additional workshops need to be built, significantly reducing on-site construction costs and land requirements. Designed based on the working condition of "4,000 ppm, 20°C brackish water", its rated daily fresh water output reaches 120 cubic meters (calculated based on a rated water production flow rate of 5 m³/h and 24-hour daily operation). This capacity can meet the daily drinking water needs of approximately 500 people, or support water demand for small-scale agricultural irrigation and remote mining camps.
Rapid Installation and Commissioning: Over 90% of component installation, pipeline connection and commissioning work is completed in the factory. On-site operations only require connecting water inlet, power supply and drainage interfaces. The cycle from equipment delivery to official commissioning can be shortened to less than 10 days, which is much faster than traditional decentralized desalination systems.
Strong Corrosion Resistance: High-pressure pipelines and fittings are made of Sch10 SS316 stainless steel; the container frame and inner wall are coated with heavy-duty marine anti-corrosion paint; core components in wet areas (such as membrane housings and dosing tanks) are made of UPVC or FRP corrosion-resistant materials. These designs enable the system to withstand brackish water erosion for a long time, with a designed service life of more than 10 years.
Low-Energy Operation: Equipped with a high-efficiency high-pressure pump, IE3-class energy-saving motor and low-energy reverse osmosis membrane, the energy consumption per unit water production is only 1.58 kWh/m³, which is 15% lower than the average energy consumption of similar small-scale brackish water desalination equipment in the industry, ensuring controllable long-term electricity costs.
Three-Level Filtration Protection: Adopting a three-level filtration process of "sand filter + pre-filter + main filter", it can trap particulate impurities, colloids and microorganisms with a particle size ≥ 5μm in brackish water, avoiding wear of the high-pressure pump and pollution of the reverse osmosis membrane. The service life of membrane modules can be extended to more than 3 years.
Easy Maintenance and Rapid Recovery: Core components use standardized universal models (such as 8040-type reverse osmosis membranes and general pressure gauges). In case of failure, the system can be quickly restored to operation by replacing parts, reducing downtime to less than 2 hours and lowering maintenance difficulty and losses.
BWC100 adopts the core technology of "pretreatment + single-stage reverse osmosis" and realizes efficient desalination of brackish water through the closed-loop process of "water intake-storage-purification-desalination-product water storage". The specific steps are as follows:
Water Intake and Storage: Brackish water is extracted by an Intake Pump and sent to a Feed Tank (volume ≥ 10 m³) for temporary storage. The water tank is equipped with a liquid level sensor to balance the inlet water flow and pressure, avoiding the impact of inlet water fluctuations on subsequent processes.
Pretreatment and Purification:
The Feed Pump pressurizes the water to 4-6 barg, and simultaneously doses Poly Aluminium Chloride (PAC) to flocculate impurities and Sodium Hypochlorite (NaClO) to kill microorganisms in the water (residual chlorine controlled at 0.5-1.0 mg/L).
The water flows through sand filters (Φ600mm × 3 sets) to filter particulate impurities with a particle size > 10 μm (the sand filter can be switched to bypass mode if the inlet water turbidity is < 0.3 NTU).
Sodium Bisulfite (NaHSO₃) is dosed to remove residual chlorine (residual chlorine < 0.1 mg/L to prevent oxidation of the reverse osmosis membrane), and an Anti-scalant (dosage 2 ppm) is dosed to inhibit scaling of calcium and magnesium ions. Finally, the water passes through a Safety Filter (precision 5 μm) to trap tiny impurities, providing a final protection for the reverse osmosis membrane.
Single-Stage Reverse Osmosis Desalination: A High-Pressure Pump (HPP, power 7.9 kW) pressurizes the pretreated water to 20 barg (maximum system pressure) and sends it to the 8040-type reverse osmosis membrane module (6 pieces, series design). Water molecules pass through the membrane to form fresh water (TDS < 500 mg/L), and the high-salinity concentrated water is discharged through a pressure relief valve, which can be recycled for non-drinking scenarios such as slag flushing and dust suppression on demand.
Product Water and Membrane Maintenance: Fresh water is stored in a Product Tank (volume ≥ 20 m³) and transported to water points by a frequency-conversion product water pump; the system is equipped with a small-scale Cleaning in Place (CIP) device (including a 200L CIP tank and a single CIP pump), which can regularly perform chemical cleaning on the reverse osmosis membrane to restore membrane flux and desalination efficiency. The cleaning cycle can be manually set through the control system.
The following parameters are all designed based on "4,000 ppm, 20°C brackish water". The data is extracted from the BWC series parameter table in the "Technical specifications" section of the document Desal BWC series Containerized BWRO system (苦咸水的 可用数据 做一些单页).pdf, and the table can be fully viewed on a single page:
| Technical Parameter | Unit | BWC100 Configuration | Remarks |
|---|
| Rated Product Flow | m³/h | 5 | Corresponding to a daily output of 120 m³; when the inlet water TDS is < 3,000 ppm, the output can be slightly increased by 5%-8% |
| Rated Product Flow | L/S | 1.39 | - |
| Rated Recovery Rate | % | 70 | 70% of the inlet water is converted into fresh water, and 30% is concentrated water (TDS ≈ 13,000 ppm); the recovery rate can be fine-tuned according to needs |
| Rated Feed Flow | m³/h | 7.14 | Designed to match the single-stage RO membrane, ensuring stable membrane surface velocity (1.0-1.2 m/s) |
| Maximum System Pressure | barg | 20 | Normal operating pressure is 18-20 barg; a high-pressure version of 25 barg can be customized for high-TDS (> 5,000 ppm) inlet water scenarios |
| RO Membrane Specification | inch | 8040 | Industry-standard membrane type, compatible with mainstream brands such as Dow and Hydranautics, easy to replace |
| Quantity of RO Membranes | pcs | 6 | Single-stage series design, ensuring a desalination rate ≥ 97% |
| Dry Weight of Equipment | ton | 5 | Does not include operating water in the system, facilitating land transportation, sea transportation and on-site hoisting (a crane of 5 tons or more is required for matching) |
| Container Size | ft | 20 | 20ft standard container (length 6.1m × width 2.44m × height 2.59m), compatible with general transportation tools |
| Rated Power (Core Equipment) | kW | 7.9 | Includes power of high-pressure pump, CIP pump and dosing pump; excludes intake pump (additional configuration required, power ≥ 2.2 kW) |
| Energy Consumption per Unit Product Water | kWh/m³ | 1.58 | Low-energy design, saving more than 15% energy compared with traditional small-scale desalination equipment |
| Installed Power (Including Auxiliary Equipment) | kW | 18.9 | Includes power of core equipment + lighting + control cabinet; a three-phase power supply line of ≥ 20 kW is required for matching |
| Power Input | - | 3PH, 380VAC±10%, 50Hz | Three-phase AC power; versions with 220V voltage and 60Hz frequency can be customized to adapt to power grids in different regions |
Note: Rated parameters are designed based on standard brackish water. If the inlet water quality (such as TDS, turbidity) exceeds the conventional range, please contact the manufacturer to adjust the pretreatment or membrane module configuration; rated power does not include the power of the intake pump, product water transfer pump and air conditioner.
The BWC100 has clear restrictions on inlet water quality; simple pretreatment is required if the quality exceeds the specified range. The product water fully meets the WHO drinking water standards, with specific parameters as follows:
| Category | Indicator | Requirement | Remarks |
|---|
| Feed Water Standards | Salinity (TDS) | 1,000-5,000 mg/L | Simple nanofiltration pretreatment is required if TDS > 5,000 mg/L to prevent membrane scaling |
| Temperature | 5-35°C | An electric heating device is required if the temperature is < 5°C; natural cooling or a small cooling tower should be installed if the temperature is > 35°C to avoid a decrease in membrane flux |
| Turbidity | ＜40 NTU | A sedimentation tank pretreatment is required if turbidity > 40 NTU to ensure the inlet water turbidity is < 5 NTU |
| Chemical Oxygen Demand (COD) | ＜10 mg/L | Activated carbon filtration is required if COD > 10 mg/L to prevent organic matter from polluting membrane modules |
| Ferrous (Fe²⁺) | ＜0.1 mg/L | A small amount of oxidant (such as sodium hypochlorite) needs to be dosed if exceeding the standard to oxidize Fe²⁺ to Fe³⁺ for removal by filtration |
| Manganese (Mn²⁺) | ＜0.1 mg/L | Manganese sand filtration pretreatment needs to be added if exceeding the standard to avoid manganese scaling on the membrane surface |
| Oil and Grease | 0 mg/L | A simple oil separator screen must be installed before water intake to ensure no oil pollution (grease can permanently damage reverse osmosis membranes) |
| Product Water Standards (Drinking Water) | Salinity (TDS) | ＜500 mg/L | Meets the WHO "Guidelines for Drinking Water Quality" (4th edition, 2012) and is safe for direct drinking |
| pH Value | 6-8 | No additional adjustment needed; the water quality is mild and suitable for human physiological needs |
| Turbidity | ＜0.2 NTU | The water quality is clear and transparent with no visible suspended impurities, requiring no subsequent filtration |
With its compact design and flexible adaptability, the BWC100 can cover a variety of small-scale brackish water desalination demand scenarios:
Island Residential Areas/Remote Villages: Solve the daily drinking water needs of small communities lacking municipal water supply, replacing high-cost fresh water transportation.
Small Agricultural Planting Bases: Treat underground brackish water to provide fresh water that meets irrigation standards for fruits, vegetables and cash crops, improving crop yield.
Remote Mining Camps: Provide stable fresh water for employee living areas in small mining areas, ensuring water supply for dozens to hundreds of people in production and daily life.
Small Hotels/Resorts: Meet the domestic water and service water needs of small accommodation facilities in coastal or inland brackish water areas.
Emergency Water Supply Scenarios: Quickly build a temporary water supply system after natural disasters (such as floods and droughts) to solve short-term emergency water problems.
The model and supporting kit codes of the BWC100 are clear, facilitating accurate procurement:
| Item | Specific Content | Description |
|---|
| System Model | BWC100 | Containerized brackish water reverse osmosis system, 20ft container specification |
| System Code Number | 204A003 | Unique internal identifier of the manufacturer, used for order confirmation, production tracking and after-sales docking |
| Filter Kit Code Number | 244P003 | Includes filter elements of all levels (sand filter media, safety filter elements, CIP filter elements) for 1 year of use; additional procurement is required if the inlet water contains many impurities |
| Insulation Kit Code Number | 254P003 | Includes container insulation layer (30mm thickness, made of flame-retardant foam) and small air conditioner, suitable for environments of -5℃-40℃, avoiding temperature affecting membrane efficiency |
Note: The filter kit dosage is calculated based on conventional inlet water quality; additional spare filter elements need to be purchased if the inlet water has high turbidity or high impurity content (such as near industrial areas).
If the equipment operates in strict accordance with the specifications in the Operation Manual for BWC100 Containerized Brackish Water Reverse Osmosis System, the manufacturer provides a dual warranty guarantee:
Core Equipment Warranty: 12-month warranty for core components such as high-pressure pumps, reverse osmosis membranes and control cabinets (starting from the date of qualified commissioning);
Overall System Warranty: 6-month warranty for the entire system except for vulnerable parts (such as filter elements and O-rings) (starting from the date of qualified commissioning);
Maximum Warranty Period: A maximum 12-month warranty from the date of equipment delivery (whichever expires first);
Warranty Service: In case of quality problems within the warranty period, the manufacturer will respond within 48 hours and provide repair or replacement services within 72 hours (except for remote areas).
For inquiries about technical details (such as inlet water quality adaptation and capacity fine-tuning), obtaining quotations, or procurement, please contact us through the following methods:
Landline: +86 0510 85163211
Mobile Phone: +86 13646187144
Address: Room 511, Block B, 100 Dicui Road, Binhu, Wuxi, Jiangsu, China
Official Website: www.fgwater.com
Email: [email protected]
For more products, please visit: https://www.fgwater.com/Containerized-Water-Purification-System/
PDF manual download address:Desal BWC series Containerized BWRO system