Arsenic Treatment Systems

One of the most serious water quality problems encountered in industrial facilities, well water, and network systems is heavy metal contamination. Among these contaminants, arsenic is a compound that is colorless, odorless, and tasteless, making its presence in water physically undetectable, yet posing serious risks to human health and industrial processes. Arsenic treatment systems are professional engineering solutions designed to reduce this hazardous substance, which occurs naturally in water sources or as a result of industrial waste, to safe levels in accordance with international standard limits.

A properly designed arsenic treatment plant not only complies with legal regulations, but also protects worker health and ensures the safety of water-dependent production processes.

Arsenic can occur naturally in groundwater through the dissolution of rocks, but it can also enter water sources through mining activities, agricultural spraying, and various industrial wastes. It exists in water in two different forms: As(III) and As(V). It is a legal requirement that the amount of arsenic in drinking water and food production processes be below 10 µg/L (micrograms per liter).

If arsenic removal is not performed in water, the structure of food products may be compromised, products may fail to meet export standards, and long-term health risks may arise in internal facility use. At this point, surface or coarse filtration methods are insufficient for arsenic retention; specific technological infrastructure is required.

The process of removing arsenic from water varies depending on the chemical characteristics of the water, its pH value, and the form of arsenic (As+3 or As+5). The following professional methods are generally preferred for industrial arsenic treatment:a

Arsenic is usually found in water in a dissolved form. Oxidizing agents such as chlorine, ozone, or potassium permanganate are injected into the water via dosing pumps to convert the arsenic into a filterable solid form. It is then physically removed from the water by passing it through special media filter tanks.

It is a highly effective method, particularly in systems with flow rates below a certain level and in waters with low sulfate content. Using specially manufactured arsenic-removing anionic ion exchange resins, arsenic ions in the water are retained in the resin bed. When these resins reach saturation, they are cleaned through a regeneration process and made ready for reuse.

Reverse osmosis, which is based on the principle of water filtration through semi-permeable membranes under high pressure, also offers high efficiency as an arsenic filter. It ensures that arsenic, along with other dissolved minerals in the water, is purified at a rate of 90-99%. It is preferred as a comprehensive water purification scenario, especially in facilities that carry out sensitive production.

Advanced arsenic removal technologies have become a standard requirement in many different areas where water quality is critical:

• Municipalities and City Networks: To protect public health in facilities that provide centralized drinking water.
• Food and Beverage Industry: Processes where the water used in product formulation must be completely free of heavy metals.
• Independent Facilities and Sites: Large residential projects and hotels where mains water is unavailable and well water requires arsenic treatment.
• Agriculture and Livestock: For optimizing animal health in precision farming applications and on farms.

Although many products are sold on the market under the name of standard drinking water arsenic removal devices, there is no “one-size-fits-all” solution for industrial and high-capacity applications. The selection must be based on engineering data to ensure the system works correctly and operating costs are optimized.

A detailed water analysis must be performed before designing the system. Other components in the water, such as iron, manganese, sulfate, and silicate, directly affect arsenic removal efficiency. The choice of ion exchange resin, oxidation, or membrane technology should be determined by evaluating the daily water consumption rate (flow rate), the water’s pH value, and the existing infrastructure of the facility.

For professional engineering services that ensure your water treatment processes meet standards, comply with legal limits, and protect your business from risks, contact our team of professional engineers to determine the most suitable solutions for your facility.