How Can High-Salt Wastewater Be Treated and Recovered as a Resource?

In industrial environmental management, high-salt wastewater treatment remains one of the most challenging problems. Wastewater containing high concentrations of salts and complex organic and inorganic components is difficult to treat with conventional biological processes, creating a major barrier to sustainable industrial development.

As a professional supplier of industrial waste salt resource recovery systems, Myande Group leverages core technologies and equipment such as MVR evaporation systems to provide integrated solutions for high-salt wastewater treatment, salt separation, and resource recovery. The goal is to help industrial companies achieve both environmental compliance and economic value.

Why Is High-Salt Wastewater Difficult to Treat?

High-salt wastewater is commonly generated by industries such as chemical manufacturing, pharmaceuticals, agrochemicals, and coal chemicals. Its composition varies significantly depending on the production process and may contain high concentrations of ions such as F⁻, Cl⁻, SO₄²⁻, and PO₄³⁻, together with a wide range of complex organic compounds.

The main challenges of high-salt wastewater treatment include:

🔸Microbial inhibition: High salinity can significantly inhibit microorganisms and disrupt conventional activated sludge systems.

🔸Equipment corrosion: High concentrations of salts and corrosive components can accelerate equipment corrosion and increase maintenance requirements.

🔸Scaling and fouling: Salt crystallization can cause severe scaling in heat-transfer equipment, affecting system stability and efficiency.

🔸High treatment costs: Complex wastewater compositions often require multiple treatment stages, increasing energy and operating costs.

These challenges make conventional wastewater treatment technologies insufficient for many high-salt industrial applications. More flexible solutions are needed to combine wastewater treatment, salt separation, energy efficiency, and resource recovery.

How Can High-Salt Wastewater Be Converted into Recoverable Salt?

Rather than treating high-salt wastewater solely as waste, an integrated evaporation and crystallization system can concentrate dissolved salts and recover them as usable by-products.

With more than two decades of experience in energy-efficient evaporation technologies, Myande has developed mature solutions covering evaporation, flash evaporation, and freeze crystallization. Different technologies can be combined according to wastewater composition, salt characteristics, and the required recovery process.

Key equipment includes:

🔸Forced-circulation evaporators

🔸Falling-film evaporators

🔸Flash evaporators

🔸Freeze crystallization systems

By combining these technologies, Myande's systems can support the separation of different mixed-salt streams, including sodium chloride/sodium sulfate (NaCl/Na₂SO₄) and sodium chloride/potassium chloride (NaCl/KCl) systems.

The recovered individual salts can meet applicable by-product salt standards, enabling a shift from conventional wastewater disposal toward waste salt resource recovery. This approach can reduce waste generation while creating additional economic value from recovered materials.

Why Is MVR Evaporation Important for High-Salt Wastewater Treatment?

MVR evaporation technology can play an important role in energy-efficient industrial wastewater treatment. By mechanically recompressing secondary steam and reusing its thermal energy, MVR systems can reduce the demand for external steam compared with conventional evaporation processes.

For high-salt wastewater applications, MVR evaporation can be integrated with crystallization and salt separation technologies to create a more efficient treatment route. The actual system configuration depends on factors such as wastewater composition, target salt purity, treatment capacity, and energy conditions.

From Wastewater Treatment to Resource Recovery

Myande's evaporation equipment has been applied across industries including chemicals, lithium batteries, metallurgy, and pharmaceuticals, supporting customers with complex industrial wastewater treatment requirements.

Behind these solutions is an integrated manufacturing and engineering capability. Myande operates a more than 130,000-square-meter intelligent manufacturing base and has obtained certifications and qualifications including ISO 9001, ASME, CE, CUTR, and UL, as well as a special equipment manufacturing license.

The company also provides turnkey engineering services, covering system design, equipment manufacturing, project implementation, and other stages of project delivery. This integrated approach allows solutions to be adapted to different wastewater characteristics and production requirements.

Building More Sustainable Industrial Wastewater Treatment Systems

The future of high-salt wastewater treatment is moving beyond simple pollutant removal toward a combination of resource recovery, energy efficiency, and waste reduction.

Through evaporation, crystallization, flash evaporation, and freeze crystallization technologies, Myande aims to help industrial companies recover valuable salts while improving wastewater treatment performance and reducing resource consumption.

As industries accelerate their transition toward lower-carbon production, integrated high-salt wastewater treatment and waste salt recovery systems can provide a pathway for turning an environmental challenge into an opportunity for greater resource efficiency and economic value.