BWC200 Containerized Brackish Water Reverse Osmosis System Technical Details

In small-to-medium water-consuming scenarios (such as township communities, medium-sized agricultural bases, and chain hotels) where brackish water is widely distributed and fresh water resources are scarce, integrated desalination equipment that balances capacity and flexibility is key to meeting water demand. The FENIGAL BWC200 Containerized Brackish Water Reverse Osmosis System, with a 20ft standardized container as its integrated carrier, integrates a full set of core components for brackish water desalination. Relying on advantages of stable water production, low energy consumption, and rapid deployment, it provides a professional solution for small-to-medium-scale brackish water desalination needs.

I. Core Positioning and Key Advantages of the System

(I) Basic Attributes and Treatment Capacity

As the core containerized model for small-to-medium-scale brackish water desalination in the Desal BWC series, the BWC200 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 work and land occupation costs (a single system occupies only about 48㎡). Designed based on the working condition of "4,000 ppm, 20°C brackish water", its rated daily fresh water output reaches 240 cubic meters (calculated based on a rated water production flow rate of 10 m³/h and 24-hour daily operation). This capacity can meet the daily drinking water needs of approximately 1,000 people, or support water demand for medium-sized agricultural irrigation and centralized water supply in townships.

(II) Key Advantages

1. 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 12 days, which is much faster than traditional decentralized desalination systems (the commissioning cycle of traditional systems usually takes 1-3 months).

2. 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 (thickness ≥ 60μm); 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 12 years.

3. Low-Energy Operation: Equipped with a high-efficiency high-pressure pump (efficiency ≥ 82%), IE3-class energy-saving motor, and low-energy reverse osmosis membrane (water production energy consumption per unit area reduced by 10%), the energy consumption per unit water production is only 1.56 kWh/m³, which is 18% lower than the average energy consumption of similar small-to-medium brackish water desalination equipment in the industry, significantly reducing long-term electricity costs.

4. 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 3-4 years.

5. 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 2.5 hours and lowering maintenance difficulty as well as losses in production and daily life.

II. Brackish Water Desalination Process and Flow

BWC200 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:

1. Water Intake and Storage: Brackish water is extracted by an Intake Pump and sent to a Feed Tank (volume ≥ 20 m³) for temporary storage. The water tank is equipped with a liquid level sensor and a frequency-conversion water replenishment device to balance the inlet water flow and pressure, avoiding the impact of inlet water fluctuations on subsequent processes.

2. 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 (Φ800mm × 4 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 2-3 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.

3. Single-Stage Reverse Osmosis Desalination: A High-Pressure Pump (HPP, power 15.6 kW) pressurizes the pretreated water to 20 barg (maximum system pressure) and sends it to the 8040-type reverse osmosis membrane module (12 pieces, "parallel + 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.

4. Product Water and Membrane Maintenance: Fresh water is stored in a Product Tank (volume ≥ 40 m³) and transported to water points by a frequency-conversion product water pump; the system is equipped with a medium-sized Cleaning in Place (CIP) device (including a 400L 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 set automatically or manually through the control system.

III. Key Technical Parameters of BWC200

The following parameters are designed based on "4000 ppm, 20℃ brackish water". The data table is as follows:

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.

IV. Water Quality Standards and Applicable Scenarios

(I) Inlet and Outlet Water Quality Requirements

BWC200 has clear restrictions on the inlet water quality. If it exceeds the specified range, simple pretreatment is required. The outlet water fully complies with the WHO drinking water standards. The specific parameters are as follows:

(II) Applicable Scenarios

With its balanced capacity and flexibility, the BWC200 can cover a variety of small-to-medium brackish water desalination demand scenarios:

• Township Communities/Satellite Villages: Provide centralized drinking water for small-to-medium communities lacking municipal water supply, replacing high-cost cross-regional fresh water transfer.

• Medium-Sized Agricultural Planting Bases: Treat underground brackish water to provide fresh water that meets irrigation standards for fruits, vegetables, and cash crops (such as cotton and grapes), improving crop yield and quality.

• Chain Hotels/Resorts: Meet the domestic water, landscape water, and service water needs of medium-sized accommodation facilities in coastal or inland brackish water areas.

• Remote Industrial Parks: Provide production water for small-to-medium factories (such as food processing and light industry), or treat industrial circulating water discharge (brackish water type) to realize water resource recycling.

• Mining Living Camps: Provide stable fresh water for employee living areas in medium-sized mining areas, ensuring water supply for hundreds of people in production and daily life.

V. Ordering Information and Warranty Policy

(I) Core Ordering Parameters

The BWC200 model and kit codes are clearly marked, making it easy to purchase accurately. Ordering information is as follows:

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 mining areas or industrial areas).

(II) Warranty Policy

If the equipment operates in strict accordance with the specifications in the Operation Manual for BWC200 Containerized Brackish Water Reverse Osmosis System, the manufacturer provides a dual warranty guarantee:

• Core Equipment Warranty: 18-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: 12-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 24-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).

VI. System Appearance and Manufacturer Information

(I) System Appearance Reference

(II) Manufacturer Contact Information

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