BWC500-H Containerized Brackish Water Reverse Osmosis System

In medium-to-large water-consuming scenarios where brackish water reserves are abundant but fresh water resources are scarce, highly integrated and efficient desalination equipment is crucial for ensuring stable water supply. The FENIGAL BWC500-H Containerized Brackish Water Reverse Osmosis System, with a 40-foot standardized container as its carrier, integrates high-performance desalination components and an intelligent control unit. Relying on large capacity, low energy consumption, and strong adaptability, it provides large-scale brackish water desalination solutions for scenarios such as towns, large agricultural bases, and industrial parks.

I. Core Positioning and Key Advantages of the System

(I) Basic Attributes and Treatment Capacity

As a dedicated containerized model for medium-to-large-scale brackish water desalination in the Desal BWC series, the BWC500-H integrates all core modules (pretreatment system, reverse osmosis unit, chemical cleaning and dosing system, electrical control system, etc.) into one 40-foot standardized container. No additional workshops need to be built, significantly reducing on-site construction work and land occupation costs. Its design is based on the working condition of "4,000 ppm, 20°C brackish water", with a rated daily fresh water output of 528 cubic meters (calculated based on a rated water production flow rate of 22 m³/h and 24-hour daily operation). This capacity can meet the daily drinking water needs of approximately 2,500 people, or support thousand-acre-level agricultural irrigation and medium-sized industrial production water demand.

(II) Key Advantages

1. High-Efficiency Integration and Rapid 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, greatly shortening the cycle from equipment delivery to commissioning and avoiding the lengthy construction of traditional decentralized systems.

2. Strong Corrosion Resistance and Durability: 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; wet-area components are made of corrosion-resistant materials such as duplex steel, SS904L, or UPVC. These designs enable the system to withstand brackish water erosion for a long time, extending the equipment's service life to more than 10 years.

3. Low Energy Consumption and Controllable Costs: Equipped with a high-efficiency high-pressure pump, IE3-class energy-saving motor, and low-energy reverse osmosis membrane, the energy consumption per unit of water production is only 1.04 kWh/m³, which is more than 15% lower than the average energy consumption of similar medium-to-large brackish water desalination equipment in the industry, significantly reducing long-term operating costs.

4. Three-Stage Filtration and Membrane Protection: Adopting a three-stage filtration process of "sand filter + pre-filter + main filter", it can effectively trap particulate impurities, colloids, and microorganisms in brackish water, avoiding wear of the high-pressure pump and pollution of the reverse osmosis membrane, and ensuring stable operation of the system.

5. Flexible Maintenance and Rapid Recovery: Core components use standardized universal models; in case of failure, the system can be quickly restored to operation by replacing parts. At the same time, it supports remote data collection and fault early warning (sensors can be upgraded on demand), reducing the cost of manual inspection.

II. Brackish Water Desalination Process and Flow

The BWC500-H uses a mature reverse osmosis (RO) core process to achieve efficient desalination of brackish water through a complete process of "water intake - pretreatment - high-pressure desalination - produced water storage - membrane maintenance". The specific steps are as follows:

1. Water Intake and Storage: Brackish water is pumped by an Intake Pump and sent to a Feed Tank for temporary storage 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, and at the same time, Poly Aluminium Chloride (PAC) is dosed for impurity flocculation, and Sodium Hypochlorite (NaClO) is dosed to kill microorganisms in the water.

• The water flows through a Sand Filter to filter particulate impurities with a particle size larger than 10 μm (the Sand Filter can be omitted if the inlet water turbidity is less than 0.3 NTU).

• Sodium Bisulfite (NaHSO₃) is dosed to remove residual chlorine in the water (to prevent oxidation of the reverse osmosis membrane), and an Anti-scalant is dosed to inhibit scaling of calcium and magnesium ions. Finally, the water passes through a Safety Filter (with a precision of 5 μm) to trap tiny impurities, providing a final protection for the reverse osmosis membrane.

3. Reverse Osmosis Desalination: The High-Pressure Pump (HPP) pressurizes the pretreated water to 20 barg (maximum system pressure) and sends it to the 8040-type reverse osmosis membrane module. Driven by pressure, water molecules pass through the membrane to form fresh water, while the concentrated water with high salinity is discharged through a pressure relief valve.

4. Product Water and Membrane Maintenance: Fresh water is stored in a Product Tank and transported to water points as needed; the system is equipped with a Cleaning in Place (CIP) device (including a CIP tank, CIP pump, and filter), which can regularly perform chemical cleaning on the reverse osmosis membrane to restore membrane flux and desalination efficiency.

III. Key Technical Parameters of BWC500-H

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

IV. Water Quality Standards and Applicable Scenarios

(I) Inlet and Outlet Water Quality Requirements

BWC500-H has clear restrictions on the quality of influent water. If it exceeds the specified range, additional pre-treatment is required. The effluent fully complies with WHO drinking water standards. The specific parameters are as follows:

(II) Applicable Scenarios

BWC500-H has large production capacity and strong adaptability, and can cover a variety of medium and large brackish water desalination demand scenarios:

• Towns and Small Cities: Provides large-scale drinking water for remote towns lacking municipal water supply, replacing high-cost fresh water transfer.

• Large Agricultural Planting Bases: Treats underground brackish water to provide fresh water that meets irrigation standards for cash crops such as cotton, fruits, and vegetables, improving crop yield.

• Industrial Parks: Provides production water for industries such as chemical engineering and electronics, or treats industrial circulating water discharge (brackish water type) to realize water resource recycling.

• Golf Courses and Resorts: Meets the landscape water, irrigation water, and domestic water needs of large-scale leisure and entertainment facilities, suitable for coastal or inland brackish water areas.

• Mining Areas and Energy Bases: Provides stable fresh water for employee living areas in remote mining areas and power plant cooling systems, ensuring the normal operation of production and life.

V. Ordering Information and Warranty Policy

(I) Core Ordering Parameters

The BWC500-H model and supporting kit codes are clearly marked, facilitating accurate purchasing:

(II) Warranty Policy

If the equipment operates in strict accordance with the specifications in the Operation Manual for BWC Series Brackish Water Desalination System, the manufacturer provides a dual warranty guarantee:

• Warranty Period 1: A 12-month warranty from the date when the system passes on-site commissioning and the acceptance report is signed.

• Warranty Period 2: A maximum 18-month warranty from the date of equipment delivery (whichever expires first).

• Warranty Scope: Covers quality issues of core equipment (high-pressure pump, reverse osmosis membrane, control cabinet), excluding component damage caused by excessive inlet water quality or improper operation.

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 customization), 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

• E-mail: [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